CN223193987U

CN223193987U - Mobile terminal

Info

Publication number: CN223193987U
Application number: CN202421728318.7U
Authority: CN
Inventors: 冯堃; 孙利滨; 王吉康; 刘棋; 薛亮; 余冬
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2024-05-07
Filing date: 2024-07-19
Publication date: 2025-08-05
Anticipated expiration: 2034-07-19
Also published as: CN120914485A

Abstract

The utility model provides a mobile terminal which comprises three shells and an antenna system which are connected in turn in a rotating mode. The antenna system comprises a satellite antenna, wherein the satellite antenna comprises a satellite radio frequency link, a first radiator, a second radiator, a third radiator, a first tuning circuit and a second tuning circuit, and the satellite radio frequency link is coupled with the third radiator. The first radiator, the second radiator and the third radiator are respectively arranged on different shells, and the three radiators are positioned at one end of the mobile terminal. The first radiator is coupled with the first tuning circuit, and the second radiator is coupled with the second tuning circuit. By adopting the scheme, when the satellite antenna is in a working state, the first radiator, the first tuning circuit, the second radiator, the second tuning circuit and the third radiator can be utilized to jointly generate the target pattern of the satellite antenna, which is beneficial to optimizing the pattern and/or the gain of the satellite antenna, so that the communication performance of the satellite antenna can be improved.

Description

Mobile terminal

The present utility model claims priority from the chinese patent application filed in the intellectual property office of the people's republic of China, application number 202410555767.4, entitled "a folding terminal device" at day 5 and day 7 of 2024, the entire contents of which are incorporated herein by reference.

Technical Field

The utility model relates to the technical field of communication, in particular to a mobile terminal.

Background

With the development of human society, mobile terminals such as mobile phones have become an indispensable tool in life. People's dependence on mobile terminals has affected aspects of life. With the rise of technologies for realizing communication by using communication satellites by mobile terminals, practical use requirements of communication satellites of mobile terminals are getting stronger.

In order to enable communication using a communication satellite, it is first necessary to establish a communication connection between a satellite antenna of a mobile terminal and the communication satellite, and a pattern of the satellite antenna is one of factors affecting a communication connection speed and connection stability. For mobile terminals of different forms, such as bar-type terminal products and foldable terminal products, as well as foldable terminal products in different folded states, they generally have different floor dimensions, which have different effects on the pattern. Therefore, the design of the satellite antenna can be realized by analyzing the patterns of the satellite antenna of the mobile terminal under different floor size forms, so as to achieve the aim of improving the satellite communication performance of the mobile terminal.

Disclosure of utility model

The utility model provides a mobile terminal which is used for improving satellite communication performance of the mobile terminal.

The mobile terminal provided by the utility model comprises a first shell, a second shell, a third shell, a first rotating shaft mechanism, a second rotating shaft mechanism and an antenna system. The first shell is rotationally connected with the second shell through a first rotating shaft mechanism, and the second shell is rotationally connected with the third shell through a second rotating shaft mechanism. The antenna system comprises a satellite antenna, wherein the satellite antenna comprises a satellite radio frequency link, a first radiator, a second radiator, a third radiator, a first tuning circuit and a second tuning circuit, the first radiator is connected with the first tuning circuit in a coupling way, the second radiator is connected with the second tuning circuit in a coupling way, and the third radiator is connected with the satellite radio frequency link in a coupling way. In addition, the first radiator, the second radiator and the third radiator are respectively arranged on different shells. And the first radiator, the second radiator and the third radiator are positioned at one end of the mobile terminal along the axial direction of the mobile terminal. Based on this, in the antenna system of the mobile terminal provided by the utility model, when the satellite antenna is in an operating state, the first radiator and the first tuning circuit, the second radiator and the second tuning circuit, and the third radiator are used for jointly generating a target pattern of the satellite antenna. Therefore, one resonant structure can be formed by the first tuning circuit and the first radiator, and the other resonant structure can be formed by the second tuning circuit and the second radiator, so that the two resonant structures can be used for influencing the resonant mode of resonance generated by the third radiator, the purposes of adjusting the target pattern of the satellite antenna and/or improving the gain of the satellite antenna can be achieved, and the communication performance of the satellite antenna can be improved.

By adopting the design scheme of the antenna system provided by the utility model, the first radiator can be connected into the corresponding branch of the first tuning circuit and the second radiator can be connected into the corresponding branch of the second tuning circuit according to the folding state of the mobile terminal, so that the resonant structure formed by the first radiator through the first tuning circuit and the resonant structure formed by the second radiator through the second tuning circuit can influence the resonant mode of resonance generated by the third radiator.

Specifically, when the mobile terminal is in a flattened state and the third radiator is disposed in the second housing, if the satellite antenna is in an operating state, the first radiator is coupled to the floor through a branch of the first tuning circuit and is used to generate a first resonance. The second radiator is coupled to the floor through a branch of the second tuning circuit to form a first resonant structure, the first resonant structure corresponding to the first frequency. In addition, a third radiator is used to generate a third resonance. The first frequency and the resonance point frequency of the third resonance are in the first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band. In this way, through the coupling between the first radiator and the third radiator, the current of the third radiator flows to the first radiator and is grounded, so as to suppress the current of the third radiator, and the pattern of the satellite antenna is tilted towards one side of the third housing. In addition, the current of resonance generated by the third radiator can flow to the second radiator and then to the floor more through the coupling between the second radiator and the third radiator. Because the floor of the mobile terminal is larger in size in the flattened state, current on the floor can flow along the frame and the floor in the traveling wave state so as to generate an orthogonal polarization radiation field, thereby enhancing the circular polarization gain of the satellite antenna, being beneficial to increasing the beam width of the directional diagram so as to meet the satellite antenna satellite alignment requirement, and further improving the communication performance of the satellite antenna.

In practical application, when the mobile terminal is in a flattened state and the third radiator is arranged on the second shell, if the satellite antenna is in an operating state, the first radiator is coupled and connected with the floor through one branch of the first tuning circuit to form a first resonance structure, and the first resonance structure corresponds to the first frequency. The second radiator is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponding to the second frequency. The third radiator is for generating a third resonance. The frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance can be made to be equal to or less than 10% f3, so that the current of the third radiator can be suppressed through the coupling between the first radiator and the third radiator. In addition, the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance can be satisfied that f23 is more than 10% f3, so that the coupling between the second radiator and the third radiator enables the floor current and the current between the second radiator and the third radiator to generate an orthogonal polarization radiation field, and the circular polarization gain of the satellite antenna is improved.

In one possible implementation, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies that 0≤f13≤100 MHz. In addition, the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23>100MHz.

In another possible implementation of the present utility model, when the mobile terminal is in the flattened state and the third radiator is disposed in the second housing, if the satellite antenna is in an operating state, the first radiator is coupled to the floor through a branch of the first tuning circuit and is configured to generate the first resonance. The second radiator is coupled to the floor through a branch of the second tuning circuit to form a first resonant structure, the first resonant structure corresponding to the first frequency. In addition, a third radiator is used to generate a third resonance. The frequency of the resonance point of the third resonance is in the first communication frequency band of the satellite antenna, the first frequency is higher than the first communication frequency band, and the second frequency is higher than the first communication frequency band. Therefore, the circular polarization gain of the satellite antenna can be enhanced through the orthogonal polarization radiation field comprehensively generated by the floor and the frame radiator, so that the communication performance of the satellite antenna is improved.

In practical application, when the mobile terminal is in a flattened state and the third radiator is arranged on the second shell, if the satellite antenna is in an operating state, the first radiator is coupled and connected with the floor through one branch of the first tuning circuit to form a first resonance structure, and the first resonance structure corresponds to the first frequency. The second radiator is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponding to the second frequency. The third radiator is for generating a third resonance. The frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies that f13 is greater than 10% f3, so that the coupling between the first radiator and the third radiator enables the floor current and the current between the first radiator and the third radiator to generate an orthogonal polarization radiation field, and the circular polarization gain of the satellite antenna is enhanced. In addition, the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23>10% f3 is satisfied to generate an orthogonal polarization radiation field between the floor current and the first and third radiators through coupling between the second and third radiators, thereby enhancing the circular polarization gain of the satellite antenna.

In one possible implementation, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies that f13>100MHz, and the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23>100MHz.

In another possible implementation manner of the present utility model, when the mobile terminal is in a flattened state, the first radiator is disposed on the first housing, the second radiator is disposed on the second housing, and the third radiator is disposed on the third housing, if the satellite antenna is in an operating state, the first radiator may be coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, and the second radiator may be coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency. In addition, a third radiator is used to generate a third resonance. The frequency of the resonance point of the third resonance is in the first communication frequency band of the satellite antenna, the first frequency is higher than the first communication frequency band, and the second frequency is higher than the first communication frequency band. Therefore, the first resonant structure formed by the first radiator through the first tuning circuit and the second resonant structure formed by the second radiator through the second tuning circuit can have a larger influence on the resonant mode of resonance generated by the third radiator, so that the purposes of adjusting the directional diagram of the satellite antenna and the circular polarization gain of the satellite antenna are achieved, and the improvement of the communication performance of the satellite antenna can be facilitated.

In practical application, when the mobile terminal is in a flattened state, the first radiator is arranged on the first shell, the second radiator is arranged on the second shell, and the third radiator is arranged on the third shell, if the satellite antenna is in an operating state, the first radiator can be coupled and connected with the floor through one branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, and the second radiator can be coupled and connected with the floor through one branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency. In addition, a third radiator is used to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies that f13 is greater than 10% f3, so that the current between the first radiator and the third radiator and the floor current generate an orthogonal polarization radiation field, and the circular polarization gain of the satellite antenna is enhanced. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23 is more than 10% f3, so that a circuit between the second radiator and the third radiator and the floor current generate an orthogonal polarization radiation field, and the circular polarization gain of the satellite antenna is enhanced.

In one possible implementation, the frequency difference f13 of the first frequency f1 and the third frequency f3 satisfies that f13>100MHz. In addition, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies that f23>100MHz.

In one possible embodiment of the present utility model, when the mobile terminal is in a flattened state, the first radiator is disposed on the first housing, the second radiator is disposed on the second housing, and the third radiator is disposed on the third housing, if the satellite antenna is in an operating state, the first radiator is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, and the first resonant structure corresponds to the first frequency. The second radiator is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponding to the second frequency. The third radiator is used for generating third resonance, wherein the first frequency and the resonance point frequency of the third resonance are in the first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band. Therefore, the circular polarization gain of the satellite antenna can be improved, and the maximum radiation direction of the directional diagram of the satellite antenna can be adjusted.

In practical application, when the mobile terminal is in a flattened state, the first radiator is arranged on the first shell, the second radiator is arranged on the second shell, and the third radiator is arranged on the third shell, if the satellite antenna is in an operating state, the first radiator can be coupled and connected with the floor through one branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, and the second radiator can be coupled and connected with the floor through one branch of the second tuning circuit to form a second resonant structure, and the second resonant structure corresponds to a second frequency. In addition, a third radiator is used to generate a third resonance. The frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies that f13 is less than or equal to 10 percent and f3 is satisfied, so that the current of the third radiator is suppressed through the coupling between the first radiator and the third radiator, and the maximum radiation direction of the directional diagram is adjusted. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23>10% f3 to generate an orthogonal polarization radiation field by coupling between the second radiator and the third radiator and the floor current, thereby enhancing the circular polarization gain of the satellite antenna.

In one possible implementation, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies that 0≤f13≤100 MHz. In addition, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies that f23>100MHz.

In the mobile terminal provided by the utility model, the first shell comprises a first supporting surface for supporting the flexible display screen, the second shell comprises a second supporting surface for supporting the flexible display screen, and the third shell comprises a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface is intersected with the second supporting surface, and the third radiator is arranged on the second shell, namely when the mobile terminal is in a hovering state, if the satellite antenna is in an operating state, the first radiator is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, the third radiator is used for generating a sixth resonance, and the resonance point frequencies of the fifth frequency and the sixth resonance are in a second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band. When the mobile terminal is in the hovering state, the size of the floor is large, and the current of the satellite antenna can be vertically distributed on the floor, so that circular polarization is realized, and the performance of the satellite antenna is improved.

In practical application, the first housing comprises a first supporting surface for supporting the flexible display screen, the second housing comprises a second supporting surface for supporting the flexible display screen, and the third housing comprises a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface is intersected with the second supporting surface, and the third radiator is arranged on the second shell, namely when the mobile terminal is in a hovering state, if the satellite antenna is in an operating state, the first radiator is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to the fifth frequency, the third radiator is used for generating sixth resonance, and the frequency difference f46 between the resonance point frequency f4 of the fourth resonance and the resonance point frequency f6 of the sixth resonance is satisfied, so that the coupling between the first radiator and the third radiator enables the floor current and the current between the first radiator and the third radiator to generate an orthogonal polarization radiation field, and circular polarization gain of the satellite antenna is enhanced. In addition, the frequency difference f56 between the resonance point frequency f5 of the fifth resonance and the resonance point frequency f6 of the sixth resonance satisfies that f56 is less than or equal to 10 percent f3, and the coupling between the second radiator and the third radiator plays a role in suppressing the current of the third radiator, so that the maximum radiation direction of the directional diagram is adjusted.

In one possible implementation, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance may satisfy that f46>100MHz. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance may satisfy that f56 is 0≤100 MHz.

In another possible implementation manner of the present utility model, in a mobile terminal provided by the present utility model, the first housing includes a first supporting surface for supporting the flexible display screen, the second housing includes a second supporting surface for supporting the flexible display screen, and the third housing includes a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface is intersected with the second supporting surface, the first radiator is arranged on the first shell, the second radiator is arranged on the second shell, the third radiator is arranged on the second shell, the satellite antenna is in an operating state, the first radiator is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonance structure, the fourth resonance structure corresponds to a fourth frequency, the second radiator is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonance structure, the fifth resonance structure corresponds to a fifth frequency, the third radiator is used for generating a sixth resonance, the resonance point frequency of the fifth frequency and the sixth resonance is in a second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band. When the mobile terminal is in the hovering state, the size of the floor is large, and the current of the satellite antenna can be vertically distributed on the floor, so that circular polarization is realized, and the performance of the satellite antenna is improved.

In practical application, the first housing comprises a first supporting surface for supporting the flexible display screen, the second housing comprises a second supporting surface for supporting the flexible display screen, and the third housing comprises a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface is intersected with the second supporting surface, the first radiator is arranged on the first shell, the second radiator is arranged on the second shell, the third radiator is arranged on the second shell, the satellite antenna is in an operating state, the first radiator is coupled and connected with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator is coupled and connected with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to the fifth frequency, the third radiator is used for generating sixth resonance, the frequency difference f46 of the resonance point frequency f6 of the fourth frequency f4 and the sixth resonance is satisfied, f46 is greater than 10% f6, and the coupling between the first radiator and the third radiator enables the floor current to generate an orthogonal polarization radiation field between the first radiator and the third radiator, so that the circular polarization gain of the satellite antenna is enhanced. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56 is less than or equal to 10% f6, so that the current of the third radiator is suppressed through the coupling between the second radiator and the third radiator, and the maximum radiation direction of the pattern is adjusted. The circular polarization characteristic of the satellite antenna in a hovering state is improved, and therefore the communication performance of the satellite antenna is improved.

In one possible implementation, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies that f46>100MHz. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56 is less than or equal to 100MHz.

In one possible implementation of the utility model, the first housing comprises a first support surface for supporting the flexible display screen, the second housing comprises a second support surface for supporting the flexible display screen, and the third housing comprises a third support surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface is intersected with the second supporting surface, the first radiator is arranged on the first shell, the second radiator is arranged on the second shell, the third radiator is arranged on the second shell, the satellite antenna is in an operating state, the first radiator is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonance structure, the fourth resonance structure corresponds to a fourth frequency, the second radiator is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonance structure, the fifth resonance structure corresponds to a fifth frequency, and the third radiator is used for generating sixth resonance, wherein the fourth frequency, the fifth frequency and the resonance point frequency of the sixth resonance are all in a second communication frequency band of the satellite antenna. Therefore, the current of the satellite antenna can be vertically distributed on the floor, so that circular polarization is realized, the performance of the satellite antenna is improved, and the adjustment of the maximum radiation direction of the directional diagram can be realized.

In practical application, the first housing comprises a first supporting surface for supporting the flexible display screen, the second housing comprises a second supporting surface for supporting the flexible display screen, and the third housing comprises a third supporting surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface is intersected with the second supporting surface, the first radiator is arranged on the first shell, the second radiator is arranged on the second shell, the third radiator is arranged on the second shell, the satellite antenna is in an operating state, the first radiator is coupled and connected with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator is coupled and connected with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, the third radiator is used for generating sixth resonance, and the frequency difference f46 of the resonance point frequency f6 of the fourth frequency f4 and the sixth resonance satisfies that f46 is less than or equal to 10 percent f6. The frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56 is 10% or less and f6 is satisfied. Therefore, circular polarization can be realized, the performance of the satellite antenna is improved, and the adjustment of the maximum radiation direction of the directional diagram is realized.

In one possible implementation, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies that 0≤f46≤100 MHz. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56 is not less than 0 and not more than 100MHz.

When the mobile terminal is in the hovering state in the above implementation, the angle α between the third supporting surface and the second supporting surface satisfies 45 ° -135 °, such as 60 ° -120 ° or 80 ° -100 °, in practical application α=90°.

In another possible implementation of the present utility model, the first housing includes a first support surface for supporting the flexible display screen, the second housing includes a second support surface for supporting the flexible display screen, and the third housing includes a third support surface for supporting the flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface and the second supporting surface are opposite, namely when the mobile terminal is in a folded state, if the satellite antenna is in an operating state, the first radiator is coupled and connected with the floor through the other branch of the first tuning circuit to form a seventh resonance structure, the seventh resonance structure corresponds to a seventh frequency, the second radiator is coupled and connected with the floor through the other branch of the second tuning circuit to form an eighth resonance structure, the eighth resonance structure corresponds to an eighth frequency, and the third radiator is used for generating a ninth resonance. The frequency of the resonance point of the ninth resonance is in the third communication frequency band of the satellite antenna, the frequency of the resonance point of the seventh resonance is higher than the third communication frequency band, and the frequency of the resonance point of the eighth resonance is higher than the third communication frequency band. When the mobile terminal is in the folded state, the second radiator can be used as a parasitic radiator of the third radiator, and the distribution of current excited by the first resonance structure formed by the second radiator through the first tuning circuit is similar to that of current excited by the ninth resonance generated by the third radiator, so that the radiation efficiency of the satellite antenna, which is caused by the folding of the third shell, can be effectively reduced, and the satellite antenna can still meet certain communication requirements.

In addition, when the mobile terminal is in the folded state, the third radiator may be disposed in the second housing, or may be disposed in the third housing or the first housing. The second radiator can be used as a parasitic radiator of the third radiator to reduce the radiation efficiency reduction of the satellite antenna caused by the folding of the third shell, so that the satellite antenna can still meet certain communication requirements.

In practical application, the first casing includes the first holding surface that is used for supporting flexible display screen, and the second casing includes the second holding surface that is used for supporting flexible display screen, and the third casing includes the third holding surface that is used for supporting flexible display screen. When the first supporting surface and the second supporting surface are coplanar, the third supporting surface and the second supporting surface are opposite, namely when the mobile terminal is in a folded state, if the satellite antenna is in an operating state, the first radiator is coupled and connected with the floor through the other branch of the first tuning circuit to form a seventh resonance structure, the seventh resonance structure corresponds to a seventh frequency, the second radiator is coupled and connected with the floor through the other branch of the second tuning circuit to form an eighth resonance structure, the eighth resonance structure corresponds to an eighth frequency, and the third radiator is used for generating a ninth resonance. The frequency difference f79 between the seventh frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies that f79>10% f9 is satisfied, so that the coupling between the first radiator and the third radiator enables the floor current and the current between the first radiator and the third radiator to generate an orthogonal polarization radiation field, and the circular polarization gain of the satellite antenna is enhanced. In addition, the frequency difference f89 between the eighth frequency f8 and the resonance point frequency f9 of the ninth resonance satisfies that f89>10% f9 to generate an orthogonal polarization radiation field by coupling between the floor current and the current between the first and third radiators through the coupling between the second and third radiators, thereby enhancing the circular polarization gain of the satellite antenna. Therefore, the effect of reducing the radiation efficiency of the satellite antenna caused by folding the third shell can be reduced, and the satellite antenna can still meet certain communication requirements.

Specifically, the frequency difference f79 between the seventh frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies that f79>100MHz. In addition, the frequency difference f89 between the eighth frequency f8 and the resonance point frequency f9 of the ninth resonance satisfies that f89>100MHz.

In the present utility model, the satellite antenna further includes a first feeding point, and the satellite radio frequency link may be coupled to the third radiator through the first feeding point. When the first radiator is arranged on the first shell, the second radiator is arranged on the third shell, and the third radiator is arranged on the second shell, the distance between the first feeding point and the axis of the first rotating shaft structure is larger than that between the first feeding point and the axis of the second rotating shaft structure. This may facilitate the reinforcement of the pattern of the satellite antenna towards the third housing, thereby obtaining a desired pattern, which may facilitate the improvement of the radiation efficiency of the satellite antenna.

In one possible implementation manner of the present utility model, the satellite antenna further includes a third switch component, and the third switch component is coupled to the third radiator, so that the transmitting state and the receiving state of the satellite antenna can be switched by switching the conducting state of the third switch component. The satellite antenna is illustratively in a transmitting state when the third switch assembly is in the first conductive state and in a receiving state when the third switch assembly is in the second conductive state.

In addition, when the satellite antenna is in a transmitting state, the first radiator can be connected to the first branch of the first tuning circuit. When the satellite antenna is in a receiving state, the first radiator can be connected to the second branch of the first tuning circuit. Therefore, when the satellite antenna is in a transmitting state and a receiving state, the first radiator can be correspondingly controlled through the corresponding branch of the first tuning circuit, so that the communication requirement of the satellite antenna is met, and the intelligent of the antenna system is improved.

In another possible implementation of the present utility model, the first radiator may also be connected to the same branch of the first tuning circuit when the satellite antenna is in the transmitting state or the receiving state. Thus, the satellite communication requirement of the mobile terminal can be met, and the simplification of an antenna system is realized.

As described above, the mobile terminal provided by the utility model has at least two folding states, and for any two folding states, when the satellite antenna is in an operating state, the first radiator can be respectively connected to different branches of the first tuning circuit, and the second radiator can be respectively connected to different branches of the second tuning circuit. The first frequency corresponding to the first resonance structure formed by the first radiator through the first tuning circuit and the second frequency corresponding to the second resonance structure formed by the second radiator through the second tuning circuit meet the relation between the first frequency and the resonance point frequency of resonance generated by the third radiator, so that the radiation efficiency of the satellite antenna when the mobile terminal is in each folding state is improved.

In another possible implementation, the mobile terminal is in a different folded state, and the satellite antenna is in an operating state, so that the first radiator is also connected to the same branch of the first tuning circuit. The first radiator can be connected to a branch circuit for enabling the resonance point frequency f of the first radiator to be 2500MHz less than or equal to f less than or equal to 2700MHz, so that the first radiator can work in the fixed working frequency band when the mobile terminal is in various folding states. Therefore, the satellite communication requirements of the mobile terminal in different folding states can be met, and the simplification of an antenna system is facilitated.

In the utility model, the mobile terminal is in different folding states, and when the satellite antenna is in an operating state, the first radiator is connected to the same branch of the first tuning circuit, which can be understood that when the mobile terminal is in different folding states, the state of the first tuning circuit is controlled by the radio frequency link of the fixed operating frequency band. The antenna system may further comprise a cellular radio frequency link, and the mobile terminal may control a state of the first tuning circuit through the cellular radio frequency link, such that the first tuning circuit controls the first radiator to operate in the fixed operating frequency band.

In one possible implementation of the present utility model, when the satellite antenna is in a non-operating state, the first radiator is coupled to the radio frequency link of the first antenna, and is configured to generate a first resonance, and a resonance point frequency of the first resonance is within a communication frequency band of the first antenna. In practical applications, the first antenna radio frequency link may be a cellular radio frequency link, and when the satellite antenna is in a non-operating state, the first radiator is used as a radiator of the cellular antenna, and when the satellite antenna is in an operating state, the first radiator and the first tuning circuit may form a resonant structure for affecting a pattern of the satellite antenna. It can be understood that the frequency corresponding to the first resonant structure when the satellite antenna is in the operating state can be the same as the frequency of the resonant point of the first resonance generated by the first radiator when the satellite antenna is in the non-operating state, so that the multiplexing of the cellular antenna can be realized, and the purpose of simplifying the antenna system can be achieved.

In addition, in the present utility model, the mobile terminal may control the state of the second tuning circuit through a cellular radio frequency link or a satellite link so that the second radiator generates a corresponding resonance.

In another possible implementation of the utility model, the antenna system further comprises a cellular radio frequency link, the first radiator comprising a second feeding point, the cellular radio frequency link being coupled to the second feeding point. When the mobile terminal is in a closed state and the satellite antenna is in a non-working state, the second radiator is used as a radiator of the cellular antenna, and at the moment, the resonance point frequency of the third radiator can be made to be larger than that of the first radiator, and the resonance point frequency of the second radiator is made to be larger than that of the first radiator. In this way, the second radiator and the third radiator can be used as parasitic radiators of the first radiator, so that the resonance efficiency of the first radiator is improved, and the cellular communication performance of the antenna system is improved.

Drawings

FIG. 1 is a schematic diagram of a mobile terminal performing satellite communication according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a mobile terminal in a flattened state according to an embodiment of the present utility model;

Fig. 3 is a schematic structural diagram of a mobile terminal in a hovering state according to an embodiment of the present utility model;

Fig. 4 is a schematic diagram of a structure of a mobile terminal in a flattened state according to an embodiment of the present utility model;

fig. 5a is a schematic diagram of a distribution structure of an antenna system when a mobile terminal provided in an embodiment of the present utility model is in a flattened state;

Fig. 5b is a schematic diagram of another distribution structure of an antenna system when the mobile terminal provided in the embodiment of the present utility model is in a flattened state;

Fig. 6a is a schematic diagram of a distribution structure of an antenna system in a hovering state of a mobile terminal according to an embodiment of the present utility model;

Fig. 6b is a schematic diagram of another distribution structure of an antenna system when a mobile terminal according to an embodiment of the present utility model is in a hovering state;

Fig. 7a is a schematic diagram of a distribution structure of an antenna system of a mobile terminal in a folded state according to an embodiment of the present utility model;

FIG. 7B is an enlarged view of a partial structure at B of the structure shown in FIG. 7 a;

fig. 7c is a schematic diagram of another distribution structure of an antenna system of a mobile terminal in a folded state according to an embodiment of the present utility model;

Fig. 8 is a schematic diagram of another structure of an antenna system when the mobile terminal provided in the embodiment of the present utility model is in a flattened state;

Fig. 9 is a schematic diagram of a pattern of the satellite antenna of the mobile terminal shown in fig. 8 in a transmitting state according to an embodiment of the present utility model;

Fig. 10 is a schematic diagram of a pattern of the satellite antenna of the mobile terminal shown in fig. 6a in a transmitting state according to an embodiment of the present utility model;

Fig. 11 is a schematic diagram of a pattern of the satellite antenna of the mobile terminal shown in fig. 7a in a transmitting state according to an embodiment of the present utility model.

Reference numerals:

100-foldable stand, 1-first shell, 101-first supporting surface, 2-second shell, 201-second supporting surface, 3-third shell;

301-third supporting surface, 4-first rotating shaft mechanism and 5-second rotating shaft mechanism;

6-first radiator, 7-second radiator, 8-third radiator, 9-first feeding point, 10-first switch component;

SW 1-first switching device, SW 2-second switching device, 11-second switching component, SW 3-third switching device, C1-first capacitor;

SW 4-fourth switching device, 12-third switching component, SW 5-fifth switching device, C2-second capacitor, SW 6-sixth switching device;

200-flexible display screen.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail with reference to the accompanying drawings.

The terminology used in the following examples is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification of the present utility model and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary.

Reference in the specification to "one embodiment" or "a particular embodiment" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

In order to facilitate understanding of the mobile terminal provided by the embodiment of the present utility model, an application scenario thereof is first described below.

Fig. 1 is a schematic diagram of satellite communication performed by a mobile terminal according to an embodiment of the present utility model, where, as shown in fig. 1, the communication satellite communication belongs to a non-terrestrial network (non terrestrial network, NTN) communication, and can be used to communicate with the mobile terminal. Communication satellite communications may provide wider coverage than terrestrial communications. In particular, in an area where the cellular communication base station is less or difficult to cover, communication can be performed by using the communication satellite. Satellite communication systems can be classified into three types, geostationary orbit (geostationary earth orbit, GEO) satellite communication systems (also known as geostationary orbit communication satellites), medium earth orbit (medium earth orbit, MEO) satellite communication systems, and Low Earth Orbit (LEO) satellite communication systems, according to the orbital heights of the satellites. GEO satellites orbit at a altitude of 35786km have the major advantage of being able to remain stationary relative to the ground and of providing a large coverage area. The orbit height of the MEO satellite is 2000-35786 km, and the method has the advantage that the global coverage can be realized through a relatively small number of satellites. Integrating the advantages and disadvantages of MEO satellite communication, MEO satellites are mainly applied to positioning and navigation at present. The orbit height of the LEO satellite is 300-2000 km, and the LEO satellite is lower than the MEO orbit height and the GEO orbit height, and has the advantages of small data propagation delay, small transmission loss and relatively low transmitting cost.

As satellite communication technology matures, it is increasingly applied to various types of mobile terminals. By way of example, the satellite communication functionality of a foldable mobile terminal may be implemented by providing a satellite antenna in a currently popular foldable mobile terminal product.

Currently, in order to simultaneously meet the requirements of users on large display images and portability of foldable mobile terminals, foldable mobile terminal products in multi-fold forms such as three-fold, four-fold, five-fold and the like are gradually applied to daily life of people. Taking a three-fold mobile terminal as an example, referring to fig. 2, fig. 2 is a schematic structural diagram of the mobile terminal in a flattened state according to an embodiment of the present utility model. The mobile terminal may include a foldable stand 100 and a flexible display screen 200, the flexible display screen 200 being mounted to the foldable stand 100. In addition, in this flattened state, the flexible display screen 200 is in a fully unfolded state, at which time the display area of the mobile terminal is maximized.

With continued reference to fig. 2, the foldable stand 100 of the mobile terminal may include three housings, which are designated as a first housing 1, a second housing 2, and a third housing 3, respectively, and two hinge mechanisms, which are designated as a first hinge mechanism 4 and a second hinge mechanism 5, respectively, for convenience of description. Wherein the first rotating shaft mechanism 4 is located between the first housing 1 and the second housing 2, and the first housing 1 and the second housing 2 are rotatably connected through the first rotating shaft mechanism 4. The second rotating shaft mechanism 5 is located between the second casing 2 and the third casing 3, and the second casing 2 and the third casing 3 are rotatably connected through the second rotating shaft mechanism 5. When the mobile terminal is used, the first shell 1 and the second shell 2 can rotate oppositely or reversely under the action of the first rotating shaft mechanism 4, and the second shell 2 and the third shell 3 can rotate oppositely or reversely under the action of the second rotating shaft mechanism 5, so that the mobile terminal can be closed and unfolded according to different use scenes.

In order to enable communication using a communication satellite, it is first necessary to establish a communication connection between a satellite antenna of a mobile terminal and the communication satellite, and a pattern of the satellite antenna is one of factors affecting a communication connection speed and connection stability. For mobile terminals of different forms, for example foldable terminal products in different folded states, they often have different floor dimensions, which have different effects on the pattern. Therefore, the design of the satellite antenna can be realized by analyzing the patterns of the satellite antenna of the mobile terminal under different floor size forms, so as to achieve the aim of improving the satellite communication performance of the mobile terminal.

In view of this, the mobile terminal provided by the utility model utilizes the plurality of radiators to jointly generate the target pattern of the satellite antenna so as to optimize the satellite antenna pattern, thereby improving the communication performance of the satellite antenna.

In the present utility model, the foldable mobile terminal may include, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electronic book reader, a camera, a wearable device, a home electronic device, or the like. For ease of understanding, in the embodiments of the present utility model, a foldable mobile terminal is described as an example of a mobile phone.

In the present utility model, the first casing 1, the second casing 2, and the third casing 3 may respectively form a mounting space for mounting electronic components such as a circuit board, a battery, a receiver, a speaker, or a camera of the mobile terminal. The circuit board may integrate electronic components such as a main controller, a storage unit, an antenna module, a power management module, and the like of the electronic device, and the battery may supply power to the electronic components such as the flexible display 200, the circuit board, the receiver, the speaker, the camera, and the like. In one possible design, at least two of the first housing 1, the second housing 2 and the third housing 3 are provided with mounting spaces to distribute components of the mobile terminal to the respective housings. In another possible design, only one of the first housing 1, the second housing 2, or the third housing 3 may be provided with an installation space to intensively distribute components of the mobile terminal in the accommodation space.

The flexible display screen 200 can be used to display information and provide an interactive interface for a user, and in various embodiments of the present utility model, the flexible display screen 200 may be, but not limited to, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini-light-emitting diode (mini organic light-emitting diode) display screen, a micro-light-emitting diode (micro organic light-emitting diode) display screen, a micro-organic light-emitting diode (micro organic light-emitting diode) display screen, a quantum dot LIGHT EMITTING diodes (QLED) display screen, or the like.

In addition, in order to facilitate understanding of the present utility model, terms which may appear in embodiments of the present utility model are explained below.

As foldable mobile terminals include a variety of configurations during use, for example, foldable mobile terminals include a flattened state, a hovering state, and a folded state. For convenience of description, the angle between the first housing 1 and the second housing 2 described above is considered to be a first angle, and the angle between the second housing 2 and the third housing 3 is considered to be a second angle.

The flattened state refers to a state in which the first casing 1, the second casing 2, and the third casing 3 of the foldable mobile terminal are fully unfolded, and as shown in fig. 2, in the flattened state, a first angle between the first casing 1 and the second casing 2 may be located between 175 ° and 185 °, and a second angle between the second casing 2 and the third casing 3 may be located between 175 ° and 185 °, and specifically may be a state in which a first angle between the first casing 1 and the second casing 2 is 180 °, and a second angle between the second casing 2 and the third casing 3 is 180 °.

The hovering state refers to a state in which the first casing 1 and the second casing 2 are unfolded to a certain angle but are not completely flattened. Referring to fig. 3, fig. 3 is a schematic structural diagram of the mobile terminal in a hovering state according to an embodiment of the present utility model, in the hovering state, a first angle between the first housing 1 and the second housing 2 may be between 45 ° and 175 °, and a second angle between the second housing 2 and the third housing 3 may be between 45 ° and 175 °.

The folded state may also be called a closed state, in which the first housing 1 and the second housing 2 of the foldable mobile terminal are completely folded and closed, and the second housing 2 and the third housing 3 are completely folded and closed, so that the first angle is 0 ° and the second angle is 0 °, or in some embodiments, the first angle between the first housing 1 and the second housing 2 may be further 0 ° to 45 °, and in addition, the second angle between the second housing 2 and the third housing 3 may be further 0 ° to 45 °.

The radiator is a device for receiving/transmitting electromagnetic wave radiation in the antenna. In some cases, an "antenna" is understood in a narrow sense as a radiator that converts guided wave energy from a transmitter into radio waves, or converts radio waves into guided wave energy for radiating and receiving radio waves. The modulated high frequency current energy (or guided wave energy) produced by the transmitter is transmitted via the feeder to the transmitting radiator, where it is converted into electromagnetic wave energy of a certain polarization and radiated in a desired direction. The receiving radiator converts electromagnetic wave energy from a certain polarization in a particular direction in space into modulated high frequency current energy which is fed via a feeder to the receiver input.

Ground/floor may refer broadly to at least a portion of any ground layer, or ground plate, or ground metal layer, etc., within a communication terminal (such as a cell phone), or at least a portion of any combination of any of the above ground layers, or ground plates, or ground components, etc., and "ground/floor" may be used for grounding of components within the communication terminal. In one embodiment, the "ground/floor" may include any one or more of a ground layer of a circuit board of a communication terminal, a ground plate formed of a middle frame of a communication terminal, a ground metal layer formed of a metal film under a screen, a conductive ground layer of a battery, and a conductive member or metal member electrically connected to the above ground layer/ground plate/metal layer. In one embodiment, the circuit board may be a printed circuit board (printed circuit board, PCB), such as an 8-, 10-, 13-, or 12-14 layer board with 8, 10-, 12-, 13-, or 14 layers of conductive material, or elements separated and electrically insulated by a dielectric or insulating layer such as fiberglass, polymer, or the like.

Any of the above ground layers, or ground plates, or ground metal layers are made of conductive materials. In one embodiment, the conductive material may be any one of copper, aluminum, stainless steel, brass, and alloys thereof, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver plated copper foil on an insulating substrate, silver foil on an insulating substrate and tin plated copper, cloth impregnated with graphite powder, a graphite coated substrate, a copper plated substrate, a brass plated substrate, and an aluminized substrate. Those skilled in the art will appreciate that the ground layer/plate/metal layer may be made of other conductive materials.

The casing of mobile terminal includes the frame, and the frame sets up around the periphery circumference of casing. The frame mainly comprising conductive material may be referred to as a conductive frame or a metal frame of the mobile terminal, and is suitable for industrial design (industrial design, ID) of metal appearance. In one implementation, the outer surface of the bezel is primarily a conductive material, such as a metallic material, thereby forming the appearance of a metallic bezel. In these implementations, the conductive portion of the bezel including the outer surface may be used as an antenna radiator for the mobile terminal and is commonly referred to as a bezel antenna.

In another implementation, the outer surface of the bezel is primarily a non-conductive material, such as plastic, that forms the appearance of a non-metallic bezel that is suitable for non-metallic IDs. In one implementation, the inner surface of the bezel may include a conductive material, such as a metallic material. In such an implementation, the conductive portion of the inner surface of the bezel may serve as an antenna radiator for the mobile terminal. It should be appreciated that the radiator (or, the conductive material of the inner surface) disposed on the inner surface of the frame may be disposed against the non-conductive material of the frame, so as to minimize the volume occupied by the radiator, and be closer to the outside of the mobile terminal, so as to achieve better signal transmission effect, and may also be referred to as a frame antenna. The non-conductive material of the frame against which the antenna radiator is disposed means that the antenna radiator may be disposed close to an inner surface of the non-conductive material, may be disposed embedded in the non-conductive material, or may be disposed close to the inner surface of the non-conductive material, for example, a certain small gap may be formed between the antenna radiator and the inner surface of the non-conductive material. It should be appreciated that both the conductive material and the non-conductive material may be considered as part of the bezel.

Radio frequency chip is the combination of all the components of the antenna for the reception and transmission of radio frequency waves. In the case of a receive antenna, the radio frequency chip may be considered the antenna portion from the first amplifier to the front-end transmitter. In a transmit antenna, the radio frequency chip may be considered as the part after the last power amplifier. In some cases, the radio frequency chip may also be understood as a feed unit. The radio frequency chip has a function of converting radio waves into electric signals and transmitting them to the receiver assembly. In general, it is considered to be part of an antenna system for converting radio waves into electrical signals and vice versa. The antenna design should take into account the maximum power transmission possibilities and efficiency. For this purpose, the antenna feed impedance must be matched to the load resistance. The antenna feed impedance is a combination of resistance, capacitance and inductance. To ensure maximum power transfer conditions, the two impedances (load resistance and feed impedance) should be matched. Matching may be accomplished by considering frequency requirements and design parameters of the antenna (e.g., gain, directivity, and radiation efficiency).

A feed power/feed circuit is a combination of all circuits for the reception and transmission of radio frequency signals. The feed circuit may include a transceiver (transmitter) and a radio frequency front end circuit (RF front end). In some cases, the "feed circuit" is understood in a narrow sense to be a radio frequency chip (radio frequency integrated circuit, RFIC), which may be considered to include a radio frequency front end chip and transceiver. The feed circuit has a function of converting radio waves (e.g., radio frequency signals) and electric signals (e.g., digital signals). Typically, it is considered to be part of the radio frequency.

In some embodiments, a test socket (alternatively referred to as a radio frequency socket or radio frequency test socket) may also be included in the electronic device. The test socket can be used for inserting a coaxial cable, and testing the characteristics of a radio frequency front-end circuit or a radiator of an antenna through the cable. The radio frequency front end circuit may be considered to be the portion of the circuit coupled between the test socket and the transceiver.

In some embodiments, the radio frequency front-end circuitry may be integrated as a radio frequency front-end chip in the electronic device, or the radio frequency front-end circuitry and transceiver may be integrated as a radio frequency chip in the electronic device.

It will be appreciated that any two of the N-th feed circuits in the present utility model may share the same transceiver, for example transmitting signals via a radio frequency channel (e.g. a port (pin) of a radio frequency chip) in a transceiver, or may share a radio frequency front-end circuit, for example processing signals via a switch or amplifier in a radio frequency front-end.

It should also be appreciated that the two of the first/second/. Nth feed circuits in the present utility model typically correspond to two radio frequency test seats in an electronic device.

The feeder line is also called a transmission line and refers to a connecting line between the radio frequency chip of the antenna and the radiator. The transmission line may directly transmit current waves or electromagnetic waves depending on frequency and form. The connection to the transmission line on the radiator is often referred to as the feed point. The transmission line includes a wire transmission line, a coaxial line transmission line, a waveguide, a microstrip line, or the like. The transmission line may include a bracket antenna body, a glass antenna body, or the like, depending on the implementation. The transmission line may be implemented by a liquid crystal polymer material (liquid crystal polymer, LCP), a flexible printed circuit board (flexible printed circuit, FPC), a printed circuit board (printed circuit board, PCB), or the like, depending on the carrier.

Resonant frequency-resonant frequency is also known as resonant frequency. The resonance frequency may have a frequency range, i.e. a frequency range in which resonance occurs. The resonant frequency may be a frequency range with return loss characteristics less than-6 dB. The resonance strongest point may be referred to as a resonance point, and the frequency corresponding to the resonance point is the center frequency point frequency. The return loss characteristic of the center frequency may be less than-20 dB. It should be appreciated that, unless otherwise specified, the antenna/radiator referred to herein produces a "first/second..resonance", wherein the first resonance should be the fundamental mode resonance produced by the antenna/radiator, or the lowest frequency resonance produced by the antenna/radiator. It should be appreciated that the antenna/radiator may generate one or more antenna modes depending on the particular design, each of which may correspond to a fundamental mode resonance.

The range of the resonant frequency is the resonant frequency, and the return loss characteristic of any frequency point in the resonant frequency can be less than-6 dB or-5 dB.

Communication band/operating band-whatever the type of antenna, always operates within a certain frequency range (band width). For example, the operating band of the antenna supporting the B40 band includes frequencies in the range of 2300mhz to 240mhz, or that is, the operating band of the antenna includes the B40 band. The frequency range meeting the index requirements can be regarded as the operating frequency band of the antenna. The width of the operating band is referred to as the operating bandwidth. The operating bandwidth of an omni-directional antenna may reach 3-5% of the center frequency. The operating bandwidth of the directional antenna may reach 5-10% of the center frequency. The bandwidth may be considered as a range of frequencies on either side of a center frequency (e.g., the resonant frequency of a dipole), where the antenna characteristics are within an acceptable range of values for the center frequency.

The resonant frequency band and the operating frequency band may be the same or different, or their frequency ranges may partially overlap. In one embodiment, the resonant frequency band of the antenna may cover multiple operating frequency bands of the antenna.

Medium wavelength refers to the wavelength at which electromagnetic waves propagate in a medium in the operating frequency band. For example, the operating band is [ f1, f2], and the corresponding medium wavelength is also a range value [ w1, w2]. Or for simplifying the calculation, the medium wavelength may also refer to a wavelength of an electromagnetic wave propagating in the medium at the center frequency f0 of the operating frequency band, where the medium wavelength is a specific value w0.

Antenna return loss is understood to be the ratio of the power of the signal reflected back to the antenna port by the antenna circuit to the power transmitted by the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, the greater the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the smaller the radiation efficiency of the antenna.

The antenna return loss can be represented by an S11 parameter, S11 belonging to one of the S parameters. S11 represents a reflection coefficient, which can characterize the quality of the antenna transmission efficiency.

In one embodiment, the S11 diagram may be understood as a schematic diagram for representing the resonance generated by the antenna. In one embodiment, the resonance shown in the S11 plot at a portion less than-6 dB may be understood as the resonant frequency/frequency range/operating frequency band produced by the antenna. The S11 parameter is usually a negative number, the smaller the S11 parameter is, the smaller the return loss of the antenna is, that is, the more energy reflected by the antenna is, that is, the more energy actually enters the antenna, the higher the radiation efficiency of the antenna is, and the larger the S11 parameter is, the greater the return loss of the antenna is, and the lower the radiation efficiency of the antenna is.

It should be noted that, engineering generally uses an S11 value of-6 dB as a standard, and when the S11 value of the antenna is smaller than-6 dB, the antenna can be considered to work normally, or the transmission efficiency of the antenna can be considered to be better.

Antenna pattern, also known as radiation pattern. Refers to a pattern of the relative field strength (normalized modulus) of the antenna radiation field as a function of direction at a distance from the antenna, typically represented by two mutually perpendicular planar patterns passing through the antenna's maximum radiation direction.

The antenna pattern typically has a plurality of radiation beams. The radiation beam with the highest radiation intensity is called a main lobe, and the rest radiation beams are called side lobes or side lobes. Among the side lobes, the side lobe in the opposite direction to the main lobe is also called the back lobe.

Radiation efficiency is the ratio of the power radiated by the antenna to space (i.e., the power that effectively converts the electromagnetic wave portion) to the active power input to the antenna. Wherein active power input to the antenna = input power of the antenna-loss power, the loss power mainly comprising return loss power and ohmic loss power and/or dielectric loss power of the metal. Both metal loss and dielectric loss are factors affecting radiation efficiency.

It will be appreciated by those skilled in the art that the radiation efficiency is generally expressed in terms of a percentage, which has a corresponding scaling relationship with dB, the closer the radiation efficiency is to 0dB, the better the radiation efficiency characterizing the antenna.

DB is decibel, which is a ten-base logarithmic concept. Decibels are used only to evaluate the proportional relationship between one physical quantity and another, and do not have physical dimensions themselves. The difference between the two amounts can be expressed as 10 decibels for every 10-fold increase in the ratio between them. For example, a= "100", b= "10", c= "5", d= "1", a/d=20 dB, B/d=10 dB, C/d=7 dB, and B/c=3 dB. That is, two differences are 10db to 10 times, 20db to 100 times, and so on. The difference 3dB is the difference of 2 times between the two quantities.

The term "end" in the first end/second end/third end/fourth end/ground end/open end of the main radiator is not to be construed narrowly as an end point or end physically disconnected from the other radiators, but may also be considered as a section of the main radiator comprising a first end point, which is the end point of the main radiator at the slit. For example, the first end of the main radiator may be considered as a section of the main radiator within a first wavelength range of one eighth of the first end, where the first wavelength may be a wavelength corresponding to an operating frequency band of the main radiator, may be a wavelength corresponding to a center frequency of the operating frequency band, or may be a wavelength corresponding to a resonance point. In one embodiment, an "end/point" may include a connection/coupling region on the radiator to which other conductive structures are coupled, e.g., a feed end/feed point may be a coupling region on the antenna radiator to which a feed structure is coupled (e.g., a region facing a portion of the feed structure), and a ground end/ground point may be a connection/coupling region on the antenna radiator to which a ground structure is coupled.

Open end and closed end-in some embodiments, the open end and closed end are, for example, grounded, and the open end is not grounded, relative to whether or not it is grounded. In one embodiment, the open end may also be referred to as a floating end, a free end, an open end, or an open end. In one embodiment, the closed end may also be referred to as a ground end, or a shorted end. It should be appreciated that in some embodiments, other electrical conductors may be connected through open-ended coupling to transfer coupling energy (which may be understood as transferring current).

In some embodiments, the open end and the closed end are, for example, relative to other electrical conductors, the closed end being electrically connected to the other electrical conductors, the open end not being electrically connected to the other electrical conductors.

It is simply understood that the "open end" of the radiator may be such that one end of the radiator is spaced from the floor or coupled to the floor by a capacitive device, and may then be considered the open end of the radiator.

It is simply understood that the "ground" of the radiator may be such that one end of the radiator is directly connected to the floor or coupled to the floor through an inductive device, and may then be considered the ground of the radiator.

In some embodiments, the "closed end" may also be understood from the perspective of current distribution, closed end or ground end, etc., may be understood as a large current point on the radiator, and may also be understood as a small electric field point on the radiator, in one embodiment, the current distribution characteristics of the large current point/small electric field point may not be changed by coupling an electronic device (e.g., an inductive device, etc.) through the closed end, and in one embodiment, the current distribution characteristics of the large current point/small electric field point may not be changed by slotting (e.g., filling a gap of insulating material) at or near the closed end.

In some embodiments, the understanding of "open end" may also be from a current distribution perspective, open end or floating end, etc., may be understood as a small current point on the radiator, and may also be understood as a large electric field point on the radiator, and in one embodiment, the current distribution characteristics of its small current point/large electric field point may not be changed by the open end coupling electronics (e.g., capacitive devices, etc.).

It will be appreciated that the radiator end at one slot (similar to the radiator at the opening of the open or floating end in terms of the structure of the radiator) may be made to be a large current point/small electric field point by coupling electronics (e.g., capacitance, inductance, etc.), in which case it will be appreciated that the radiator end at that slot is actually a closed or grounded end, etc.

Capacitance-can be understood as lumped capacitance and/or distributed capacitance. The lumped capacitor comprises capacitive components, such as capacitive elements, and the distributed capacitor (or distributed capacitor) comprises an equivalent capacitor formed by two conductive elements with a certain gap.

In embodiments of the present utility model, a wavelength in a certain wavelength mode (e.g., a half wavelength mode, etc.) of an antenna may refer to a wavelength of a signal radiated by the antenna. It will be appreciated that the wavelength of the radiated signal in air can be calculated as wavelength = speed of light/frequency, where frequency is the frequency of the radiated signal. The wavelength of the radiation signal in the medium can be calculated as follows: Where ε is the relative permittivity of the medium and the frequency is the frequency of the radiated signal.

Coupling in the present utility model is understood to be an indirect coupling and "coupled connection" is understood to be an indirect coupling connection. An "indirect coupling" is understood to mean that the two conductors are electrically conductive by means of a space/no contact. In one embodiment, the indirect coupling may also be referred to as capacitive coupling, such as by coupling between a gap between two conductive elements to form an equivalent capacitance to effect signal transmission.

The definitions of symmetry (e.g., axi-symmetry, or center symmetry, etc.), parallel, perpendicular, identical (e.g., identical in length, identical in width, etc.), etc., mentioned in the embodiments of the present utility model are all intended to be relative to the state of the art and are not strictly defined in a mathematical sense. There may be a deviation of a predetermined angle between two structures parallel or perpendicular to each other. In one embodiment, the predetermined threshold may be less than or equal to a threshold of 1mm, for example the predetermined threshold may be 0.5mm, or may be 0.1mm. In one embodiment, the predetermined angle may be an angle in the range of ±10°, for example, the predetermined angle deviation is ±5°.

It should be noted that, in the embodiment of the present utility model, the two are "perpendicular" to each other, and a deviation of a predetermined angle may exist between the two. For example, the predetermined angle may be 85 °, 86 °, 87 °, 88 °, 89 °, 90 °, 91 °, 92 °, 93 °, 94 °, 95 °, or the like.

It should be noted that, in the embodiment of the present utility model, the two are "parallel" to each other, which means that there may be a deviation of a predetermined angle between the two. For example, the predetermined angle may be 0 °, 0.5 °,1 °, 1.5 °,2 °,3 °,4 °, 4.5 °, or 5 °, or the like.

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 4 is a schematic diagram of a structure of a mobile terminal in a flattened state according to an embodiment of the present utility model. As shown in fig. 4, in the embodiment of the present utility model, the mobile terminal includes an antenna system in addition to the above-described first housing 1, second housing 2, third housing 3, first rotation axis mechanism 4, and second rotation axis mechanism 5. The antenna system includes a satellite antenna for receiving/transmitting electromagnetic waves, and in particular, a satellite antenna for receiving electromagnetic waves of a communication satellite or transmitting electromagnetic waves to a communication satellite. This allows the satellite communication function of the mobile terminal to be achieved by the transmission of electromagnetic waves between the satellite antenna and the communication satellite. In a specific embodiment, the mobile terminal may implement at least one of satellite short message, satellite phone, or satellite internet access through a satellite antenna.

When the satellite antenna is specifically provided, the satellite antenna includes a first radiator 6, a second radiator 7, and a third radiator 8. In the present utility model, the first radiator 6, the second radiator 7, and the third radiator 8 may be provided to different housings of the mobile terminal, respectively.

In addition, along the axial direction of the mobile terminal, the first radiator 6, the second radiator 7 and the third radiator 8 may be located at one end of the mobile terminal, and an exemplary embodiment thereof may be located at an a end of the mobile terminal shown in fig. 2. In a specific embodiment, as shown in fig. 4, the first radiator 6 is disposed at an end of the first housing 1, the second radiator 7 is disposed at an end of the third housing 3, and the third radiator 8 is disposed at an end of the second housing 2.

In order to realize the communication function, the satellite antenna further comprises a satellite radio frequency link, a first tuning circuit and a second tuning circuit, wherein the satellite radio frequency link is coupled and connected with the third radiator 8 to realize the feeding of the third radiator 8 by the satellite radio frequency link, so that the third radiator 8 is used as a main radiator of the satellite antenna to communicate with a communication satellite. While the first radiator 6 is coupled to the first tuning circuit and the second radiator 7 is coupled to the second tuning circuit. It should be noted that the specific positions of the satellite radio frequency link, the first tuning circuit and the second tuning circuit are not limited, and the satellite radio frequency link, the first tuning circuit and the second tuning circuit can be exemplarily arranged on a circuit board in the mobile terminal and are accommodated in an installation space formed by the housing.

In this way, a resonant structure can be formed by the first tuning circuit and the first radiator, and another resonant structure can be formed by the second tuning circuit and the second radiator 7, so that the two resonant structures can affect the resonant mode of the resonance generated by the third radiator 8, and the purposes of adjusting the target pattern of the satellite antenna and/or improving the gain of the satellite antenna can be achieved. By adopting the design scheme of the antenna system provided by the utility model, when the satellite antenna is in a working state, the first radiator 6, the first tuning circuit, the second radiator 7, the second tuning circuit and the third radiator 8 are used for jointly generating the target pattern of the satellite antenna, which is beneficial to realizing the optimization of the satellite antenna pattern and/or improving the satellite antenna gain, thereby improving the communication performance of the satellite antenna.

It should be noted that the above description of "the first radiator 6 and the first tuning circuit, the second radiator 7 and the second tuning circuit, and the third radiator 8 are used to jointly generate the target pattern of the satellite antenna" may be understood as "the first radiator 6 and the first tuning circuit", "the second radiator 7 and the second tuning circuit", and the third radiator 8 may each have an influence on the target pattern of the satellite antenna, such as affecting the maximum radiation direction of the target pattern.

As is apparent from the above description, for a foldable mobile terminal, the floor dimensions are different when in different folded states, and the influence of different floor dimensions on the pattern is different. In order to understand the optimization effect of the antenna system provided by the utility model on the pattern of the satellite antenna, the communication performance of the satellite antenna of the mobile terminal in different folding states is analyzed.

Fig. 5a is a schematic diagram of a distribution structure of an antenna system when a mobile terminal provided in an embodiment of the present utility model is in a flattened state. In the state shown in fig. 5a, the floor of the mobile terminal is composed of three housings, which are sequentially connected in the arrangement direction thereof, the overall size of the floor of the mobile terminal is maximized. In the antenna system shown in fig. 5a, the third radiator 8 is provided in the second housing 2, the first radiator 6 is provided in the first housing 1, and the second radiator 7 is provided in the third housing 3. In this embodiment, the first radiator 6 is coupled to the floor via a branch of the first tuning circuit to form a first resonant structure, which corresponds to the first frequency. The second radiator 7 is coupled to the floor via a branch of the second tuning circuit to form a second resonant structure, which corresponds to the second frequency. In addition, feeding the third radiator 8 via the satellite radio frequency link may cause the third radiator 8 to be used to generate a third resonance.

It is noted that in the present utility model, the resonant structure may refer to a structure that generates resonance itself or does not generate significant resonance, but is capable of influencing the resonance of the third radiator 8, for example, the resonant structure may play a role in guiding the resonance current of the third radiator 8 to influence the resonance mode of the resonance of the third radiator 8.

The frequency corresponding to the resonant structure is the frequency corresponding to the electrical length of the branch of the tuning circuit to which the radiator is connected. When feeding a resonant structure, the frequency of the resonance that the resonant structure can produce can be considered as the frequency to which the resonant structure corresponds. It will be appreciated that the frequency corresponding to the resonant structure is related to the branch of the tuning circuit to which the radiator is connected.

While different branches of the first tuning circuit may be understood as having different conducting states, each conducting state may be considered as a branch of the first tuning circuit. Based on this, the adjustment of the first frequency corresponding to the first resonant structure can be achieved by switching the first radiator 6 into the corresponding branch of the first tuning circuit.

Similarly, a different branch of the second tuning circuit may be understood as a second tuning circuit having different conducting states, each of which may be considered as a branch of the second tuning circuit. This allows the adjustment of the second frequency corresponding to the second resonant structure to be achieved by switching the second radiator 7 into the corresponding branch of the second tuning circuit.

In one embodiment, in the scheme shown in fig. 5a, the first frequency and the resonance point frequency of the third resonance are both within the first communication band of the satellite antenna. This allows the current of the third radiator 8 to pass through the first radiator 6 and to the ground when flowing to the first radiator 6. So that the pattern of the satellite antenna is tilted in the direction of the third housing 3.

In an embodiment, where the second frequency is higher than the resonance point frequency of the third resonance, the coupling between the second radiator 7 and the third radiator 8 causes a current (arrow shown as a single-dot chain line in fig. 5 a) of the third radiator 8 to flow to the second radiator 7 and thus to the floor. Also, since the floor size of the mobile terminal is large in the flattened state shown in fig. 5a, current on the floor (arrow shown by dotted line in fig. 5 a) flows in the traveling wave state along the frame and the floor direction to generate the orthogonal polarized radiation field. Therefore, the circular polarization gain of the satellite antenna is enhanced, so that the circular polarization gain of the satellite antenna is beneficial to increasing the beam width of the directional diagram to meet the satellite alignment requirement of the satellite antenna, and the communication performance of the satellite antenna is improved.

It will be appreciated that in fig. 5a, the general shape of the pattern of the satellite antenna and the beam width are only schematically shown. In practical application, as long as the beam width of the upper hemisphere of the pattern of the satellite antenna meets the requirement of regulations (more than or equal to + -15 degrees in an exemplary manner), the satellite antenna can meet the satellite requirement.

It should be noted that the present utility model is not limited to the first communication frequency band of the satellite antenna, and may be an exemplary working frequency band of the satellite antenna in a receiving state when the mobile terminal is in a flattened state, or may be an operating frequency band of the satellite antenna in a transmitting state. In addition, it will be appreciated that when the satellite antenna is in communication with different communication satellites, the operating frequency band of the receiving state of the satellite antenna may be different, and the operating frequency band of the transmitting state of the satellite antenna may also be different. However, in the antenna system provided by the utility model, when the mobile terminal is in a flattened state, the resonant point frequencies of the first frequency, the second frequency and the resonance of the third radiator 8 can be adjusted according to different application scenes so as to meet the above relation, so that the directional diagram of the satellite antenna is optimized under the combined action of the first radiator, the first tuning circuit, the second radiator, the second tuning circuit and the third radiator, and/or the gain of the satellite antenna is improved so as to improve the satellite communication performance of the mobile terminal.

In the present utility model, the satellite antenna further comprises a first feeding point 9, and the satellite radio frequency link may be coupled to the third radiator 8 via the first feeding point 9. In addition, when the mobile terminal is in the flattened state shown in fig. 5a, the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the third housing 3, and the third radiator 8 is disposed in the second housing 2, as shown in fig. 4, the distance L1 between the first feeding point 9 and the axis of the first rotating shaft mechanism 4 is greater than the distance L2 between the first feeding point 9 and the axis of the second rotating shaft mechanism 5. This is advantageous in that the pattern of the satellite antenna is reinforced toward the third housing 3, thereby facilitating the improvement of the radiation efficiency of the satellite antenna.

In one embodiment, in the scheme shown in fig. 5a, in order to enable the first resonant structure to suppress the current of the third resonance, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance may be satisfied that f13+≤10% f3. In a specific embodiment, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies 0≤f13≤100 MHz, and for example, f13=50 MHz, f13=65 MHz, f13=90 MHz, etc.

In one embodiment, the frequency difference f23 between the second frequency f2 and the third resonance f3 satisfies that f23>10% f3, for example, f23 is equal to or greater than 20% f3. So that the second resonant structure can guide the current of the third resonance to the floor and the frame to enhance the orthogonal polarization characteristics of the floor current and the current between the second radiator 7 and the third radiator 8, thereby being beneficial to improving the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23>100MHz, and for example, f23+.300 MHz, such as f23=350 MHz, f23=500 MHz, f23=600 MHz, f23=700 MHz, f23=1000 MHz, or the like, can be made.

It should be noted that, in the embodiment shown in fig. 5a, the first frequency corresponding to the first resonant structure is set in the first communication frequency band, so that the pattern of the satellite antenna is tilted toward the third housing 3. In another possible embodiment of the present utility model, when the mobile terminal is in the flattened state and the third radiator 8 is disposed in the second housing 2, if the satellite antenna is in the working state, the frequency of the resonance point of the third resonance may also be in the first communication frequency band of the satellite antenna, where the first frequency is higher than the first communication frequency band, and the second frequency is higher than the first communication frequency band. The circular polarization gain of the satellite antenna is enhanced by the orthogonal polarization radiation field comprehensively generated by the floor and the frame radiator, so that the communication performance of the satellite antenna can be improved.

In one embodiment, when the mobile terminal is in the flattened state and the third radiator 8 is disposed in the second housing 2, if the satellite antenna is in an operating state, in a possible embodiment of the present utility model, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance may also be satisfied that f13>10% f3, and exemplary, f13 is greater than or equal to 20% f3, so that the coupling between the first radiator 6 and the third radiator 8 causes the floor current and the current between the first radiator 6 and the third radiator 8 to generate an orthogonal polarization radiation field, thereby enhancing the circular polarization gain of the satellite antenna. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23>10% f3, and for example, f23 is greater than or equal to 20% f3, so that the coupling between the second radiator 7 and the third radiator 8 can enable the floor current and the current between the second radiator 7 and the third radiator 8 to generate an orthogonal polarization radiation field, thereby being beneficial to improving the circular polarization gain of the satellite antenna.

In one embodiment, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies that f13>100MHz, and for example, f13+.300 MHz, such as f13=350 MHz, f13=500 MHz, f13=600 MHz, f13=700 MHz, f13=1000 MHz, etc., may be provided. In addition, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies that f23>100MHz, and for example, f23≥300 MHz, such as f23=350 MHz, f23=500 MHz, f23=600 MHz, f23=700 MHz, f23=1000 MHz, or the like, can be made.

In the above-described embodiment, the description will be made mainly with respect to the effect of the pattern generated by the three radiators in common, taking the case where the third radiator 8 is provided in the second case 2 as an example. In practical application, the setting positions of the three radiators can be adjusted according to specific design requirements. For example, reference may be made to fig. 5b, and fig. 5b is a schematic diagram of another distribution structure of an antenna system when the mobile terminal is in a flattened state according to an embodiment of the present utility model. Unlike the above-described positions of the respective radiators in the mobile terminal shown in fig. 5a, in fig. 5b, the first radiator 6 is provided in the first housing 1, the second radiator 7 is provided in the second housing 2, and the third radiator 8 is provided in the third housing 3.

In the embodiment shown in fig. 5b, when the satellite antenna is in operation, the first radiator 6 is coupled to the floor via a branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, the second radiator 7 is coupled to the floor via a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency, and the third radiator 8 is configured to generate a third resonance.

In one embodiment, the third resonance has a resonance point frequency within the first communication band of the satellite antenna, but a first frequency higher than the first communication band and a second frequency higher than the first communication band. Therefore, the first resonant structure formed by the first radiator 6 through the first tuning circuit and the second resonant structure formed by the second radiator 7 through the second tuning circuit can have a larger influence on the resonant mode of resonance generated by the third radiator 8, so that the purposes of adjusting the pattern of the satellite antenna and the circular polarization gain of the antenna are achieved, and the improvement of the radiation efficiency of the satellite antenna can be facilitated.

In addition, in one possible embodiment, when the mobile terminal is in the state shown in fig. 5b, the frequency difference f13 between the first frequency f1 and the frequency f3 of the resonance point of the third resonance may be further satisfied that f13>10% f3, and for example, f23 may be greater than or equal to 20% f3. So that the current between the first radiator 6 and the third radiator 8 and the floor current generate an orthogonal polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In a particular embodiment, the frequency difference f13 between the resonance point frequency f1 of the first resonance and the resonance point frequency f3 of the third resonance satisfies that f13>100MHz, for example f13≥300 MHz, such as f13=350 MHz, f13=500 MHz, f13=600 MHz, f13=700 MHz, f13=1000 MHz, etc., may be provided.

The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23 is greater than 10% f3, and for example, f13 is greater than or equal to 20% f3. So that the current between the second radiator 7 and the third radiator 8 and the floor current generate an orthogonal polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f23 between the second resonant frequency f2 and the third resonant frequency f3 is such that f23>100MHz, for example, f23≥300 MHz, such as f23=350 MHz, f23=500 MHz, f23=600 MHz, f23=700 MHz, f23=1000 MHz, etc., may be provided.

Other structures of the mobile terminal shown in fig. 5b may be set with reference to the mobile terminal shown in fig. 5a, and will not be described herein.

In one embodiment, when the mobile terminal is in the flattened state, the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3, if the satellite antenna is in an operating state, the first frequency and the resonance point frequency of the third resonance can be further within the first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band. Therefore, the circular polarization gain of the satellite antenna can be improved, and the maximum radiation direction of the directional diagram of the satellite antenna can be adjusted.

In one embodiment, when the mobile terminal is in a flattened state, the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3, if the satellite antenna is in an operating state, the frequency difference f13 between the first frequency f1 and the resonance point frequency f3 of the third resonance satisfies that f13+.10%) f3, so as to suppress the current of the third radiator 8 through the coupling between the first radiator 6 and the third radiator 8, thereby adjusting the maximum radiation direction of the pattern. The frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies that f23>10% f3, and for example, f23 can be greater than or equal to 20% f3, so that the coupling between the second radiator 7 and the third radiator 8 can enable the floor current and the current between the second radiator 7 and the third radiator 8 to generate an orthogonal polarization radiation field, thereby enhancing the circular polarization gain of the satellite antenna.

In one embodiment, the frequency difference f13 between the first frequency f1 and the third frequency f3 satisfies 0≤f13≤100 MHz, and for example, f13=50 MHz, f13=65 MHz, f13=90 MHz, or the like. In addition, the frequency difference f23 between the second frequency f2 and the third frequency f3 satisfies that f23>100MHz, and for example, f23≥300 MHz, such as f23=350 MHz, f23=500 MHz, f23=600 MHz, f23=700 MHz, f23=1000 MHz, or the like, can be made.

Fig. 6a is a schematic diagram of a distribution structure of an antenna system in a hovering state of a mobile terminal according to an embodiment of the present utility model. As shown in fig. 6a, the first housing 1 comprises a first support surface 101 for supporting a flexible display, the second housing 2 comprises a second support surface 201 for supporting a flexible display, and the third housing 3 comprises a third support surface 301 for supporting a flexible display. Wherein in this hovering state the first supporting surface 101 and the second supporting surface 201 are coplanar, the third supporting surface 301 intersects the second supporting surface 201.

It should be noted that, in the present utility model, the first supporting surface 101 and the second supporting surface 201 are coplanar, which is understood that an included angle between the first supporting surface 101 and the second supporting surface 201 is 175 ° to 185 °. In practical applications, the angle between the first supporting surface 101 and the second supporting surface 201 may be 180 °. In addition, the intersection of the third supporting surface 301 and the second supporting surface 201 may be such that the angle α between the third supporting surface 301 and the second supporting surface 201 satisfies 45 ° or more and less than or equal to 135 °, for example, 60 ° or more and less than or equal to 120 ° or 80 ° or less than or equal to 100 °, in practical application, α=90°.

In the embodiment shown in fig. 6a, the first radiator 6 is arranged in the first housing 1, the third radiator 8 is arranged in the second housing 2, and the second radiator 7 is arranged in the third housing 3. The first radiator 6 is coupled to the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator 7 is coupled to the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, the third radiator 8 is used for generating a sixth resonance, the resonance point frequencies of the fifth frequency and the sixth resonance are in a second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band.

Since the floor of the mobile terminal is large in size and the current on the floor is vertically distributed in the state shown in fig. 6a, circular polarization can be achieved, so that it is advantageous for improving the performance of the satellite antenna.

It should be noted that the second communication band of the satellite antenna is not limited by the present utility model, and may be an operating band of the satellite antenna in a receiving state when the mobile terminal is in a hovering state, or may be an operating band of the satellite antenna in a transmitting state. In addition, it will be appreciated that when the satellite antenna is in communication with different communication satellites, the operating frequency band of the receiving state of the satellite antenna may be different, and the operating frequency band of the transmitting state of the satellite antenna may also be different. However, in the antenna system provided by the utility model, when the mobile terminal is in a hovering state, the fourth frequency, the fifth frequency and the resonant point frequency of the resonance of the third radiator 8 can be adjusted according to different application scenes so as to meet the above relation, so that the directional diagram of the satellite antenna is optimized under the combined action of the first radiator, the first tuning circuit, the second radiator, the second tuning circuit and the third radiator, and/or the gain of the satellite antenna is improved so as to improve the satellite communication performance of the mobile terminal.

In one embodiment of the present utility model, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance may be satisfied that f46>10% f6, and for example, f46 may be equal to or greater than 20% f6, so that the coupling between the first radiator 6 and the third radiator 8 causes the floor current and the current between the first radiator 6 and the third radiator 8 to generate an orthogonal polarization radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies that f46>100MHz, and for example, f46 is greater than or equal to 300MHz, such as f46=350 MHz, f46=500 MHz, f46=600 MHz, f46=700 MHz, f46=1000 MHz, or the like.

In one embodiment of the present utility model, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56+.10% f3. So as to suppress the current of the third radiator 8 by coupling between the second radiator 7 and the third radiator 8, thereby adjusting the maximum radiation direction of the pattern. In a specific embodiment, the frequency difference f56 between the resonance point frequency f5 of the fifth resonance and the resonance point frequency f6 of the sixth resonance satisfies 0≤f56≤100 MHz, and exemplary f56=50 MHz, f56=65 MHz, f56=90 MHz, or the like.

It should be noted that, when the mobile terminal is in the hovering state shown in fig. 6a, the frequency of the resonance point of the sixth resonance may also be in the second communication frequency band of the satellite antenna, the fourth frequency is higher than the second communication frequency band, and the fifth frequency is higher than the second communication frequency band. The mobile terminal has larger floor size, and the current of the satellite antenna can be vertically distributed on the floor, so that circular polarization is realized, and the performance of the satellite antenna is improved.

It will be appreciated that in practical applications, the setting positions of the three radiators may be adjusted according to specific design requirements. As shown in fig. 6b, fig. 6b is a schematic diagram of another distribution structure of an antenna system when the mobile terminal is in a hovering state according to an embodiment of the present utility model. Unlike the above-described positions of the respective radiators in the mobile terminal shown in fig. 6a, in fig. 6b, the first radiator 6 is provided in the first housing 1, the second radiator 7 is provided in the second housing 2, and the third radiator 8 is provided in the third housing 3. The fifth frequency and the sixth resonance frequency that can be generated by the third radiator 8 are in the second communication frequency band of the satellite antenna, but the fourth frequency is higher than the second communication frequency band. When the mobile terminal is in a hovering state shown in fig. 6b, the current of the satellite antenna can be vertically distributed on the floor due to the large floor size, so that circular polarization is realized, and the performance of the satellite antenna is improved.

In addition, when the mobile terminal is in the state shown in fig. 6b, in a possible embodiment, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance may be further satisfied that f46>10% f6, and for example, f46 may be greater than or equal to 20% f6, so that the coupling between the first radiator 6 and the third radiator 8 causes the floor current and the current between the first radiator 6 and the third radiator 8 to generate an orthogonal polarized radiation field, thereby enhancing the circular polarization gain of the satellite antenna. In a specific embodiment, the frequency difference f46 between the resonance point frequency f4 of the fourth resonance and the resonance point frequency f6 of the sixth resonance satisfies that f46>100MHz, and for example, f46 is greater than or equal to 300MHz, such as f46=350 MHz, f46=500 MHz, f46=600 MHz, f46=700 MHz, f46=1000 MHz, or the like.

The frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56 is less than or equal to 10% f6, so that the current of the third radiator 8 is suppressed through the coupling between the second radiator 7 and the third radiator 8, and the maximum radiation direction of the pattern is adjusted. In a specific embodiment, the frequency difference f56 of the fifth frequency f5 and the sixth frequency f6 satisfies that f56≤100 MHz, and for example, f56=50 MHz, f56=65 MHz, f56=90 MHz, or the like.

Other structures of the mobile terminal shown in fig. 6b may be set with reference to the mobile terminal shown in fig. 6a, and will not be described herein.

It should be noted that, when the mobile terminal is in the hovering state shown in fig. 6b, the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3, if the satellite antenna is in an operating state, the first frequency, the second frequency, and the resonance point frequency of the third resonance may be further within the first communication frequency band of the satellite antenna. Therefore, the current of the satellite antenna can be vertically distributed on the floor, so that circular polarization is realized, the performance of the satellite antenna is improved, and the adjustment of the maximum radiation direction of the directional diagram can be realized.

In one embodiment of the present utility model, when the mobile terminal is in the hovering state shown in fig. 6b, the first radiator 6 is disposed in the first housing 1, the second radiator 7 is disposed in the second housing 2, and the third radiator 8 is disposed in the third housing 3, if the satellite antenna is in an operating state, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance may be further satisfied that f46 is less than or equal to 10% f6. The frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56 is 10% or less and f6 is satisfied. Therefore, circular polarization can be realized, the performance of the satellite antenna is improved, and the adjustment of the maximum radiation direction of the directional diagram is realized.

In another embodiment of the present utility model, the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies that 0≤f46≤100 MHz, and for example, f46=50 MHz, f46=65 MHz, f46=90 MHz, etc. In addition, the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56≤100 MHz, and for example, f56=50 MHz, f56=65 MHz, f56=90 MHz, or the like.

It should be noted that in the embodiment shown in fig. 6a and 6b, the third housing 3 is folded along the side of the second supporting surface 201 facing away from the flexible display screen, so that the flexible display screen can be used to display the portions of the first supporting surface 101 and the second supporting surface 201, and the display surface is larger, so that a better use experience can be provided for the user.

In other possible embodiments of the present utility model, the third housing 3 may be folded along the side of the second supporting surface 201 facing the flexible display screen, so that the mobile terminal may provide a larger display surface, and meanwhile, a certain privacy of use may be provided for the user by using the shielding of the third housing 3.

In summary, for the multi-folded mobile terminal, whether the third radiator 8 is disposed in the middle or on the adjacent one of the casings, in the fully unfolded state of the mobile terminal, the first resonant structure may be disposed on at least one of the casings adjacent to the casing in which the third radiator 8 is disposed, and the frequency corresponding to the first resonant structure may be higher than the operating frequency band of the third radiator 8 (for example, the frequency difference between the frequency corresponding to the first resonant structure and the frequency of the resonance point of the third radiator 8 is greater than 10%) so as to enhance the circular polarization gain of the satellite antenna, while the other casings on the multi-folded casing may be disposed with the second resonant structure, the third resonant structure, etc., where the frequency corresponding to any of the second resonant structure, the third resonant structure, etc. may be higher than the operating frequency band, so as to further enhance the circular polarization gain, or the frequency corresponding to any of the second resonant structure, the third resonant structure, etc. may fall within the operating frequency band, or the frequency corresponding to the any resonant structure and the frequency difference between the frequency corresponding to the third resonant structure and the frequency of the third radiator 8 may be less than or equal to 10% of the resonance point of the satellite antenna.

When the mobile terminal is in a hovering state, the third radiator 8 is arranged on one shell in an intersecting relation (for example, in an L shape), and the frequency corresponding to the resonance structure on the other shell in the intersecting relation falls in the working frequency band of the third radiator 8 (or the frequency difference between the frequency and the resonance point frequency of the third radiator 8 is less than or equal to 10%), based on the design in the hovering state, the circular polarization gain of the satellite antenna can be enhanced, the directional diagram can be improved, and any one of the frequencies corresponding to the resonance structure on the other shells on the multi-folded shell can be higher than the working frequency band of the third radiator 8, the circular polarization gain of the satellite antenna can be further enhanced, or the frequency corresponding to the resonance point frequency of the third radiator 8 can also fall in the working frequency band of the third radiator 8 (or the frequency difference between the frequency and the resonance point frequency of the third radiator 8 is less than or equal to 10%), so that the directional diagram can be improved.

Fig. 7a is a schematic diagram of a distribution structure of an antenna system of a mobile terminal in a folded state according to an embodiment of the present utility model. As shown in fig. 7a, the first housing 1 comprises a first support surface 101 for supporting a flexible display, the second housing 2 comprises a second support surface 201 for supporting a flexible display, and the third housing 3 comprises a third support surface 301 for supporting a flexible display. In the state shown in fig. 7a, the first supporting surface 101 and the second supporting surface 201 are coplanar, and the third supporting surface 301 is opposite to the second supporting surface 201, that is to say the third housing 3 is folded to the side of the second housing 2 facing away from the flexible display screen.

In the embodiment shown in fig. 7a, the third radiator 8 is arranged in the second housing 2, the first radiator 6 is arranged in the first housing 1, and the second radiator 7 is arranged in the third housing 3. If the satellite antenna is in an operating state, the first radiator 6 is coupled to the floor through the other branch of the first tuning circuit to form a seventh resonant structure, the seventh resonant structure corresponds to a seventh frequency, the second radiator 7 is coupled to the floor through the other branch of the second tuning circuit to form an eighth resonant structure, the eighth resonant structure corresponds to an eighth frequency, the third radiator 8 is used for generating a ninth resonance, a resonance point frequency of the ninth resonance is in a third communication frequency band of the satellite antenna, the seventh frequency is higher than the third communication frequency band, and the eighth frequency is higher than the third communication frequency band.

It should be noted that the third communication band of the satellite antenna is not limited by the present utility model, and may be an operating band of the satellite antenna in a receiving state when the mobile terminal is in the folded state shown in fig. 7a, or may be an operating band of the satellite antenna in a transmitting state. In addition, it will be appreciated that when the satellite antenna is in communication with different communication satellites, the operating frequency band of the receiving state of the satellite antenna may be different, and the operating frequency band of the transmitting state of the satellite antenna may also be different. However, in the antenna system provided by the utility model, when the mobile terminal is in the folded state shown in fig. 7a, the seventh frequency, the eighth frequency and the resonant point frequency of the resonance of the third radiator 8 can be adjusted according to different application scenarios so as to meet the above relationship, so that the pattern of the satellite antenna is optimized under the combined action of the first radiator and the first tuning circuit, the second radiator and the second tuning circuit and the third radiator, and/or the gain of the satellite antenna is improved, so as to improve the satellite communication performance of the mobile terminal.

Referring to fig. 7B, fig. 7B is an enlarged view of a partial structure at B of the structure shown in fig. 7 a. In this folded state of the mobile terminal, the second radiator 7 may act as a parasitic radiator for the third radiator 8. As shown in fig. 7b, the current distribution of the second radiator 7 is similar to that of the third radiator 8, which can effectively reduce the decrease of the radiation efficiency of the satellite antenna caused by folding the third casing 3, so that the satellite antenna can still meet certain communication requirements. In addition, the mobile terminal is in a folded state as shown in fig. 7a, and the floor size is slightly larger, so the satellite antenna also has a characteristic of a part of the traveling wave antenna.

In addition, when the mobile terminal is in the state shown in fig. 7a, in one possible embodiment, the frequency difference f79 between the seventh frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies that f79>10% f9, and for example, f79 may be greater than or equal to 10% f9, so that the coupling between the first radiator 6 and the third radiator 8 causes the floor current and the currents between the first radiator 6 and the third radiator 8 to generate an orthogonal polarized radiation field, which is beneficial for improving the circular polarization gain of the satellite antenna. In a particular embodiment, the frequency difference f79 between the seventh harmonic frequency f7 and the resonance point frequency f9 of the ninth resonance satisfies that f79>100MHz, for example, f79 may be greater than or equal to 300MHz, such as f79 = 350MHz, f79 = 500MHz, f79 = 600MHz, f79 = 700MHz, or f79 = 1000MHz, etc.

The frequency difference f89 between the eighth frequency f8 and the ninth frequency f9 satisfies that f89>10% f9, and for example, f89 is greater than or equal to 10% f9, so that the coupling between the second radiator 7 and the third radiator 8 can enable the floor current and the current between the second radiator 7 and the third radiator 8 to generate an orthogonal polarization radiation field, which is beneficial to improving the circular polarization gain of the satellite antenna. In a particular embodiment, the frequency difference f89 between the resonance point frequency f8 of the eighth resonance and the resonance point frequency f9 of the ninth resonance satisfies that f89>100MHz, for example, f 89. Gtoreq.300 MHz, such as f89=350 MHz, f89=500 MHz, f89=600 MHz, f89=700 MHz, or f89=1000 MHz, etc., may be provided.

Fig. 7c is a schematic diagram of another distribution structure of an antenna system of a mobile terminal in a folded state according to an embodiment of the present utility model. Unlike the above-described positions of the respective radiators in the mobile terminal shown in fig. 7a, in fig. 7b, the first radiator 6 is provided in the first housing 1, the second radiator 7 is provided in the second housing 2, and the third radiator 8 is provided in the third housing 3. If the satellite antenna is in operation, the frequency of the resonance point of the ninth resonance that can be generated by the third radiator 8 is in the third communication frequency band of the satellite antenna, the seventh frequency is higher than the third communication frequency band, and the eighth frequency is higher than the third communication frequency band. The antenna system of the mobile terminal adopts such a design manner, and the reduction of the radiation efficiency of the satellite antenna caused by the folding of the third shell 3 can be reduced by making the current distribution of the second radiator 7 similar to that of the third radiator 8, so that the satellite antenna can still meet certain communication requirements.

In the above embodiment of the present utility model, when the mobile terminal is in each folded state, the frequency corresponding to the first resonant structure and the frequency corresponding to the second resonant structure both change along with the frequency of the resonance point of the third radiator 8, and the frequency corresponding to the first resonant structure is controlled by the branch of the first tuning circuit to which the first radiator 6 is connected, and the frequency corresponding to the second resonant structure is controlled by the branch of the second tuning circuit to which the second radiator 7 is connected.

Based on this, in one possible embodiment of the utility model, the mobile terminal has at least two folded states, such as the flattened state, the hovering state and the folded state mentioned above. For any two folded states, when the satellite antenna is in an operating state, the first radiator 6 may be connected to a different branch of the first tuning circuit, and the second radiator 7 may be connected to a different branch of the second tuning circuit. Illustratively, when the mobile terminal is in a flattened state, the first radiator 6 is connected to a first branch of the first tuning circuit, the second radiator 7 is connected to a first branch of the second tuning circuit, when the mobile terminal is in a hovering state, the first radiator 6 is connected to a second branch of the first tuning circuit, the second radiator 7 is connected to a second branch of the second tuning circuit, and when the mobile terminal is in a folded state, the first radiator 6 is connected to a third branch of the first tuning circuit, and the second radiator 7 is connected to a third branch of the second tuning circuit. Therefore, the frequencies corresponding to the two resonant structures can meet the use requirements of the mobile terminal in different folding states, so that the two resonant structures can influence the resonant mode of resonance generated by the third radiator 8, the optimization of the pattern of the satellite antenna is realized, and the purpose of improving the communication performance of the satellite antenna is achieved.

In addition, it can be understood that when the mobile terminal is in the same folded state, but the setting positions of the three radiators are different, the first radiator 6 may be connected to different branches of the first tuning circuit, and the second radiator 7 may be connected to different branches of the second tuning circuit, so that the frequencies corresponding to the two resonant structures satisfy the relationship between the frequencies of the resonant points of the two resonant structures and the resonance generated by the third radiator 8, thereby improving the radiation efficiency of the satellite antenna.

In another possible embodiment of the utility model, the first radiator 6 may also be connected to the same branch of the first tuning circuit when the mobile terminal is in a different folded state. For example, the first radiator 6 may be connected to a branch for making the resonance point frequency f of the first radiator 6 satisfy 2500MHz less than or equal to f less than or equal to 2700MHz, so that the first radiator 6 operates in the above-mentioned fixed operation frequency band when the mobile terminal is in various folded states. Therefore, the satellite communication requirements of the mobile terminal in different folding states can be met, and the simplification of an antenna system is facilitated.

Also considered is the process by which the satellite antenna communicates with the communications satellite, i.e., the process by which the satellite antenna receives and transmits electromagnetic waves. In practical applications, the frequency of the electromagnetic waves receivable by the satellite antenna is different from the frequency of the electromagnetic waves transmittable by the satellite antenna. In one possible embodiment of the utility model, the first radiator 6 may be connected to a first branch of the first tuning circuit when the satellite antenna is in the transmitting state. And when the satellite antenna is in the receiving state, the first radiator 6 can be connected to the second branch of the first tuning circuit. Therefore, when the satellite antenna is in a transmitting state and a receiving state, the corresponding frequency of the first resonant structure can be correspondingly adjusted through the corresponding branch of the first tuning circuit, so that the communication requirement of the satellite antenna is met, and the intelligent performance of the antenna system is improved.

In another possible embodiment of the utility model, the first radiator 6 may also be connected to the same branch of the first tuning circuit when the satellite antenna is in the transmitting state or the receiving state. That is, the first resonant structure corresponds to the same frequency, for example, the first resonant structure corresponds to a frequency in a 2500 mhz-2700 mhz band, when the satellite antenna is in a transmitting state or a receiving state. Thus, the satellite communication requirement of the mobile terminal can be met, and the simplification of an antenna system is realized.

As can be seen from the above description, the first radiator 6 can always be connected to the same branch of the first tuning circuit. Therefore, the satellite communication requirement of the antenna system can be met, and the cellular communication requirement of the antenna system can be met, so that the utilization rate of the branch of the first tuning circuit is improved.

In one possible embodiment of the utility model, the first radiator 6 is coupled to the radio frequency link of the first antenna when the satellite antenna is in a non-operational state, and is configured to generate a first resonance, a resonance point frequency of the first resonance being within a communication frequency band of the first antenna. In practical applications, the first antenna rf link may be a cellular rf link, and when the satellite antenna is in a non-operating state, the first radiator 6 is used as a radiator of the cellular antenna for cellular communication.

It should be noted that, since the first radiator 6 and the first tuning circuit form a resonant structure for affecting the pattern of the satellite antenna when the satellite antenna is in operation. In one possible embodiment, the frequency corresponding to the first resonant structure when the satellite antenna is in the operating state may be the same as the frequency of the resonance point of the first resonance generated by the first radiator 6 when the satellite antenna is in the non-operating state, so that the multiplexing of the cellular antenna may be achieved, so as to achieve the purpose of simplifying the antenna system.

In practical applications, since the operating state of the cellular antenna includes the B41 state, when the satellite antenna is in the non-operating state, the first radiator 6 may be connected to a branch of the first tuning circuit, so that the frequency of the resonance point of the first resonance that can be generated by the first radiator 6 is tuned to the frequency band corresponding to the B41 state through the branch of the first tuning circuit. When the satellite antenna is in operation, the first radiator 6 can still be connected to the branch of the first tuning circuit, so that the frequency corresponding to the first resonant structure falls within the frequency band corresponding to the B41 state.

It will be appreciated that the first radiator 6 may also be used for other antennas and may generate a target resonance corresponding to the target frequency of the other antennas. When the first radiator 6 is used as the first resonance structure, it is sufficient if the above-described target resonance satisfies the description of the first resonance structure in the above-described embodiment of the present utility model.

In addition, in the present utility model, when the mobile terminal is in the closed state and the satellite antenna is not in operation, the resonance point frequency of the third radiator 8 may be made larger than the resonance point frequency of the resonance generated by the first radiator 6, and the resonance point frequency of the resonance generated by the second radiator 7 may be made larger than the resonance point frequency of the first radiator 6. That is, when the mobile terminal is in a closed state and the satellite antenna is not in operation, the second radiator 7 and the third radiator 8 can both be used as parasitic radiators of the first radiator 6, so that the cellular communication performance of the antenna system is improved.

It will be appreciated that in the present utility model, the mobile terminal may also control the state of the first tuning circuit via the cellular radio frequency link, thereby causing the first radiator 6 to resonate accordingly. In addition, the mobile terminal may control the state of the second tuning circuit through a cellular radio frequency link or a satellite link so that the second radiator 7 generates a corresponding resonance.

As can be seen from the foregoing description, the different branches of the first tuning circuit are understood to be different conductive states of the first tuning circuit, and each conductive state is considered to be one branch of the first tuning circuit. In the present utility model, switching of different branches of the first tuning circuit may be achieved using a switching assembly. Similarly, the switching assembly may be used between different branches of the second tuning circuit. In a specific design, reference may be made to fig. 8, and fig. 8 is a schematic diagram of another structure of the antenna system when the mobile terminal provided in the embodiment of the present utility model is in a flattened state. In this embodiment, the first radiator 6 is provided to the first housing 1, the third radiator 8 is provided to the second housing 2, and the second radiator 7 is provided to the third housing 3. In addition, the first tuning circuit further comprises a first switch assembly 10 and the second tuning circuit further comprises a second switch assembly 11. Wherein the first switching component includes a first switching device SW1 and a second switching device SW2, and the second switching component includes a third switching device SW3 and a fourth switching device SW4.

In addition, when the mobile terminal is in different folded states, the resonance point frequency of the resonance generated by the third radiator 8 is different, so that the resonance point frequency of the third radiator 8 can be adjusted according to the communication requirements in different folded states, and the satellite antenna further comprises a third switch assembly 12, and the third switch assembly 12 is coupled with the third radiator 8. In addition, as shown in fig. 8, the third switching assembly 12 includes a fifth switching device SW5 and a sixth switching device SW6.

In embodiments of the present utility model, the mobile terminal may control the turning on and off of the third switch assembly 12 via, but not limited to, a cellular radio frequency link. In addition, when the third switch assembly 12 is in the on state, the satellite radio frequency link may control the on state of the third switch assembly 12 through the first feeding point, so as to implement switching between the receiving state and the transmitting state of the satellite antenna. Illustratively, the satellite antenna is in a receiving state when the third switch assembly 12 is in the first conductive state, and the satellite antenna is in a transmitting state when the third switch assembly 12 is in the second conductive state.

It will be appreciated that in practical applications, the switching states of the switching devices in each of the switching assemblies may be adjusted to switch each radiator into a different circuit branch, thereby causing each radiator to resonate accordingly.

It should be noted that in this embodiment of the utility model, a switching device with an inductance in parallel with the floor in each switching assembly can be used to tune the resonant point frequency of the radiator up, while a switching device with a transconnected capacitance can be used to tune the resonant frequency of the radiator down. In other embodiments of the present utility model, the switch assemblies may take other possible designs to achieve the function of adjusting the resonant frequency of the radiator accordingly, which are not listed here, but are understood to fall within the scope of the present utility model.

In addition, in the above-mentioned switching devices, the cross-slit capacitor, for example, the first capacitor C1 in the third switching device S3 and the second capacitor C2 in the fifth switching device S5, may also function to increase the radiation aperture, so as to increase the gain of the satellite antenna, thereby increasing the width of the beam width of the pattern.

In a specific embodiment, when the first switching device SW1 is in the first state, the second switching device SW2 is in the first state, the third switching device SW3 is in the first state, the fourth switching device SW4 is in the first state, the fifth switching device SW5 is in the first state, and the sixth switching device SW6 is in the first state in the flattened state shown in fig. 8, the satellite antenna is in the transmitting state. At this time, the frequency of the resonance point generated by the third radiator 8 is in a communication frequency band of the satellite antenna in the transmitting state, the frequency corresponding to the first resonance structure is modulated to the working frequency band of 2500 mhz-2700 mhz by the first switch assembly 10, and the frequency corresponding to the second resonance structure is modulated to a position higher than the communication frequency band by the second switch assembly 11.

Fig. 9 is a schematic diagram illustrating a direction of the satellite antenna of the mobile terminal shown in fig. 8 in a transmitting state according to an embodiment of the present utility model. As can be seen from fig. 9, by adopting the design scheme of the antenna system provided by the utility model, the beam angle α of the directional diagram of the satellite antenna of the mobile terminal can reach more than 15 °, that is, the beam width of the directional diagram can reach more than ±15°, for example, can reach ±20°, even ±30°, which can meet the satellite communication requirement of the mobile terminal in the flattened state.

With continued reference to fig. 8, when the first switching device SW1 is in the second state, the second switching device SW2 is in the second state, the third switching device SW3 is in the second state, the fourth switching device SW4 is in the second state, the fifth switching device SW5 is in the second state, and the sixth switching device SW6 is in the second state, the satellite antenna is in the receiving state. At this time, the frequency of the resonance point generated by the third radiator 8 is in a communication frequency band of the satellite antenna in a receiving state, the frequency corresponding to the first resonance structure is modulated to an operating frequency band of 2500 mhz-2700 mhz by the first switch assembly 10, and the frequency corresponding to the second resonance structure is modulated to a position higher than the communication frequency band by the second switch assembly 11.

In addition, it is verified that when the satellite antenna is in a receiving state, the beam angle alpha of the directional diagram can reach more than 15 degrees, and the satellite antenna still can meet the satellite communication requirement of the mobile terminal in a flattened state.

In addition, when the mobile terminal is in a hovering state as shown in fig. 6a, and the first radiator 6 is provided to the first casing 1, the third radiator 8 is provided to the second casing 2, and the second radiator 7 is provided to the third casing 3. When the first switching device SW1 is in the third state, the second switching device SW2 is in the third state, the third switching device SW3 is in the third state, the fourth switching device SW4 is in the third state, the fifth switching device SW5 is in the third state, and the sixth switching device SW6 is in the third state, the satellite antenna is in the transmitting state. At this time, the frequency of the resonance point generated by the third radiator 8 is in a communication frequency band of the satellite antenna in the transmitting state, the frequency corresponding to the first resonance structure is modulated to the working frequency band of 2500 mhz-2700 mhz by the first switch assembly 10, and the frequency corresponding to the second resonance structure is modulated to a position higher than the communication frequency band by the second switch assembly 11.

Fig. 10 is a schematic diagram of a pattern of the satellite antenna of the mobile terminal shown in fig. 6a in a transmitting state according to an embodiment of the present utility model. As can be seen from fig. 10, when the mobile terminal is in a hovering state, the beam angle α of the pattern of the satellite antenna can reach 15 ° or more, that is, the beam width of the pattern can reach ±15° or more, for example, 20 ° or even ±30°, which can meet the satellite communication requirement of the mobile terminal in the hovering state.

In addition, when the first switching device SW1 is in the fourth state, the second switching device SW2 is in the fourth state, the third switching device SW3 is in the fourth state, the fourth switching device SW4 is in the fourth state, the fifth switching device SW5 is in the fourth state, and the sixth switching device SW6 is in the fourth state, the satellite antenna is in the receiving state. At this time, the frequency of the resonance point generated by the third radiator 8 is in a communication frequency band of the satellite antenna in a receiving state, the frequency corresponding to the first resonance structure is modulated to an operating frequency band of 2500 mhz-2700 mhz by the first switch assembly 10, and the frequency corresponding to the second resonance structure is modulated to the communication frequency band by the second switch assembly 11.

Through verification, when the mobile terminal is in a hovering state and the satellite antenna is in a receiving state, the beam angle alpha of the directional diagram of the mobile terminal can reach more than 15 degrees, and the mobile terminal can meet satellite communication requirements of the mobile terminal in the hovering state.

For example, when the mobile terminal is in the folded state as shown in fig. 7a, the first radiator 6 is disposed in the first housing 1, the third radiator 8 is disposed in the second housing 2, and the second radiator 7 is disposed in the third housing 3. When the first switching device SW1 is in the fifth state, the second switching device SW2 is in the fifth state, the third switching device SW3 is in the fifth state, the fourth switching device SW4 is in the fifth state, the fifth switching device SW5 is in the fifth state, and the sixth switching device SW6 is in the fifth state, the satellite antenna is in the transmitting state. At this time, the frequency of the resonance point generated by the third radiator 8 is in a communication frequency band of the satellite antenna in the transmitting state, the frequency corresponding to the first resonance structure is modulated to the working frequency band of 2500 mhz-2700 mhz by the first switch assembly 10, and the frequency corresponding to the second resonance structure is modulated to the communication frequency band by the second switch assembly 11.

Fig. 11 is a schematic diagram of a pattern of the satellite antenna of the mobile terminal shown in fig. 7a in a transmitting state according to an embodiment of the present utility model. As can be seen from fig. 11, when the mobile terminal is in a folded state, the beam angle α of the antenna pattern of the satellite antenna can meet the requirements of regulations, and the beam width thereof can reach ±15°, for example, so as to meet the satellite communication requirements of the mobile terminal in a hovering state.

In addition, when the first switching device SW1 is in the sixth state, the second switching device SW2 is in the sixth state, the third switching device SW3 is in the sixth state, the fourth switching device SW4 is in the sixth state, the fifth switching device SW5 is in the sixth state, and the sixth switching device SW6 is in the sixth state, the satellite antenna is in the receiving state. At this time, the frequency of the resonance point generated by the third radiator 8 is in a communication frequency band of the satellite antenna in a receiving state, the frequency corresponding to the first resonance structure is modulated to an operating frequency band of 2500 mhz-2700 mhz by the first switch assembly 10, and the frequency corresponding to the second resonance structure is modulated to the communication frequency band by the second switch assembly 11.

Through verification, when the mobile terminal is in a folded state and the satellite antenna is in a receiving state, the beam angle alpha of the directional diagram can also reach 15 degrees, and the satellite communication requirement of the mobile terminal in the folded state can be met.

In summary, according to the antenna system of the mobile terminal provided by the embodiment of the utility model, according to the folding state of the mobile terminal, the setting positions of the radiators and the working state of the satellite antenna, the frequency corresponding to the first resonant structure formed by the first tuning circuit and the first radiator and the frequency corresponding to the second resonant structure formed by the second tuning circuit and the second radiator can be correspondingly adjusted, so that the first resonant structure and the second resonant structure can influence the resonant mode of the resonance of the third radiator, the satellite antenna can generate a target pattern, and the optimization of the pattern of the satellite antenna is facilitated, and the radiation efficiency of the satellite antenna can be improved.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. The utility model provides a mobile terminal, its characterized in that includes first casing (1), second casing (2), third casing (3), first pivot mechanism (4), second pivot mechanism (5) and antenna system, first casing (1) with second casing (2) are through first pivot mechanism (4) rotate to be connected, second casing (2) with third casing (3) are through second pivot mechanism (5) rotate to be connected, wherein:

the antenna system comprises a satellite antenna, wherein the satellite antenna comprises a satellite radio frequency link, a first radiator (6), a second radiator (7), a third radiator (8), a first tuning circuit and a second tuning circuit, the first radiator (6) is connected with the first tuning circuit in a coupling mode, the second radiator (7) is connected with the second tuning circuit in a coupling mode, the third radiator (8) is connected with the satellite radio frequency link in a coupling mode, the first radiator (6), the second radiator (7) and the third radiator (8) are respectively arranged in different shells, and the first radiator (6), the second radiator (7) and the third radiator (8) are located at one end of the mobile terminal along the axial direction of the mobile terminal;

The first radiator (6) and the first tuning circuit, the second radiator (7) and the second tuning circuit, and the third radiator (8) are configured to jointly generate a target pattern for the satellite antenna when the satellite antenna is in operation.

2. The mobile terminal according to claim 1, wherein when the mobile terminal is in a flattened state and the third radiator (8) is arranged in the second housing (2), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor via a branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, the second radiator (7) is coupled to the floor via a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency, the third radiator (8) is configured to generate a third resonance, wherein the first frequency and a resonance point frequency of the third resonance are within a first communication frequency band of the satellite antenna, and the second frequency is higher than the first communication frequency band.

3. The mobile terminal of claim 1, wherein when the mobile terminal is in a flattened state and the third radiator (8) is disposed in the second housing (2), the satellite antenna is in an operating state, the first radiator (6) is coupled to a floor through a branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, the second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency, and the third radiator (8) is configured to generate a third resonance, wherein a frequency difference f13 between a resonance point frequency f1 of the first frequency and a resonance point frequency f3 of the third resonance satisfies that f13+.10% f3, and a frequency difference f23 between a resonance point frequency f2 of the second frequency and a resonance point frequency f3 satisfies that f23×10% f3.

4. The mobile terminal of claim 3, wherein a frequency difference f13 between the first frequency f1 and a resonance point frequency f3 of the third resonance satisfies 0≤f13≤100 MHz, and a frequency difference f23 between the second frequency f2 and the resonance point frequency f3 of the third resonance satisfies f23>100MHz.

5. The mobile terminal according to claim 1, wherein when the mobile terminal is in a flattened state and the third radiator (8) is disposed in the second housing (2), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, the second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency, the third radiator (8) is configured to generate a third resonance, wherein a resonance point frequency of the third resonance is within a first communication frequency band of the satellite antenna, the first frequency is higher than the first communication frequency band, and the second frequency is higher than the first communication frequency band.

6. The mobile terminal of claim 5, wherein when the mobile terminal is in a flattened state and the third radiator (8) is disposed in the second housing (2), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, the second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency, and the third radiator (8) is configured to generate a third resonance, wherein a frequency difference f13 between a resonance point frequency f3 of the first frequency f1 and the third resonance satisfies f13>10% > -f 3, and a frequency difference f23 between a resonance point frequency f3 of the second frequency f2 and the third resonance satisfies f23>10% > -f 3.

7. The mobile terminal according to claim 1, wherein when the mobile terminal is in a flattened state and the first radiator (6) is disposed in the first housing (1), the second radiator (7) is disposed in the second housing (2), and the third radiator (8) is disposed in the third housing (3), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through one branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponding to a first frequency, the second radiator (7) is coupled to the floor through one branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponding to a second frequency, and the third radiator (8) is configured to generate a third resonance, wherein a resonance point frequency of the third resonance is within a first communication frequency band of the satellite antenna, the first frequency is higher than the first communication frequency band, and the second frequency is higher than the first frequency band.

8. The mobile terminal of claim 7, wherein when the mobile terminal is in a flattened state and the third radiator (8) is disposed in the second housing (2), the satellite antenna is in an operating state, the first radiator (6) is coupled to the floor through a branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, the second radiator (7) is coupled to the floor through a branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency, and the third radiator (8) is configured to generate a third resonance, wherein a frequency difference f13 between a resonance point frequency f1 of the first frequency and the third resonance satisfies f13>10% > -f 3, and a frequency difference f23 between a resonance point frequency f3 of the second frequency f2 and the third resonance satisfies f23>10% > -f 3.

9. The mobile terminal of claim 1, wherein the satellite antenna is in operation when the mobile terminal is in a flattened state and the first radiator (6) is disposed in the first housing (1), the second radiator (7) is disposed in the second housing (2), and the third radiator (8) is disposed in the third housing (3), the first radiator (6) is coupled to the floor through one leg of the first tuning circuit to form a first resonant structure, the first resonant structure corresponding to a first frequency, the second radiator (7) is coupled to the floor through one leg of the second tuning circuit to form a second resonant structure, the second resonant structure corresponding to a second frequency, and the third radiator (8) is configured to generate a third resonance, wherein the first frequency and the third resonant point frequency are within a first communications band of the satellite antenna, and the second frequency is higher than the first communications band.

10. The mobile terminal of claim 1, wherein when the mobile terminal is in a flattened state and the first radiator (6) is disposed in the first housing (1), the second radiator (7) is disposed in the second housing (2), and the third radiator (8) is disposed in the third housing (3), the satellite antenna is in operation, the first radiator (6) is coupled to the floor through one branch of the first tuning circuit to form a first resonant structure, the first resonant structure corresponds to a first frequency, the second radiator (7) is coupled to the floor through one branch of the second tuning circuit to form a second resonant structure, the second resonant structure corresponds to a second frequency, and the third radiator (8) is configured to generate a third resonance, wherein a frequency difference f13 between the first frequency f1 and a resonance point frequency f3 of the third resonance satisfies f13, the frequency f13 satisfies f13, and the frequency f3 satisfies f3 of the third resonance point of the second frequency f2 satisfies f 23.

11. The mobile terminal according to any of the claims 1-10, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) is intersected with the second supporting surface (201), and the third radiator (8) is arranged on the second shell (2), the satellite antenna is in an operating state, the first radiator (6) is coupled and connected with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled and connected with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, the third radiator (8) is used for generating a sixth resonance, the fifth frequency and the resonance point frequency of the sixth resonance are in a second communication frequency band of the satellite antenna, and the fourth frequency is higher than the second communication frequency band.

12. The mobile terminal according to any of the claims 1-10, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), and the third radiator (8) is arranged on the second shell (2), the satellite antenna is in an operating state, the first radiator (6) is coupled and connected with a floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled and connected with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, and the third radiator (8) is used for generating a sixth resonance, wherein the frequency difference f46 of the resonant point frequency f6 of the fourth frequency f4 and the sixth resonance satisfies f46>10%, and the frequency difference f5 of the resonant point frequency f6 of the fifth frequency f5 and the sixth resonance satisfies f 56% or less.

13. The mobile terminal of claim 12, wherein a frequency difference f46 between the fourth frequency f4 and a resonance point frequency f6 of the sixth resonance satisfies that f46>100MHz, and wherein a frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that 0≤f56≤100 MHz.

14. The mobile terminal according to any of the claims 1-10, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) is intersected with the second supporting surface (201), the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, the first radiator (6) is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, the third radiator (8) is used for generating a sixth resonance, wherein the fifth frequency and the sixth resonant point are in a second frequency band of the satellite antenna, and the fourth frequency is higher than the fourth frequency band.

15. The mobile terminal according to any of the claims 1-10, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) intersects with the second supporting surface (201), the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, the first radiator (6) is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, and the third radiator (8) is used for generating sixth resonance; the frequency difference f46 between the fourth frequency f4 and the resonance point frequency f6 of the sixth resonance satisfies that f46 is more than 10% f6, and the frequency difference f56 between the fifth frequency f5 and the resonance point frequency f6 of the sixth resonance satisfies that f56 is less than or equal to 10% f6.

16. The mobile terminal according to any of the claims 1-10, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) is intersected with the second supporting surface (201), the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, the first radiator (6) is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, the third radiator (8) is used for generating a sixth resonance, and the fourth frequency, the fifth frequency and the sixth frequency are all within a second resonant frequency band of the satellite antenna.

17. The mobile terminal according to any of the claims 1-10, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) is intersected with the second supporting surface (201), the first radiator (6) is arranged on the first shell (1), the second radiator (7) is arranged on the second shell (2), the third radiator (8) is arranged on the third shell (3), the satellite antenna is in an operating state, the first radiator (6) is coupled with the floor through the other branch of the first tuning circuit to form a fourth resonant structure, the fourth resonant structure corresponds to a fourth frequency, the second radiator (7) is coupled with the floor through the other branch of the second tuning circuit to form a fifth resonant structure, the fifth resonant structure corresponds to a fifth frequency, the third radiator (8) is used for generating sixth resonance, wherein the difference between the fourth frequency f4 and the sixth resonant frequency f6 satisfies the resonance frequency f6, and the difference between the fourth frequency f6 f46 and the sixth resonant frequency f6 satisfies the resonance frequency f6 is less than or equal to 10 f 10% and the fifth resonant structure is less than or equal to 6 f6.

18. The mobile terminal of any of claims 11-17, wherein an angle α between the third support surface and the second support surface satisfies 45 ° and less than or equal to α and less than or equal to 135 °.

19. The mobile terminal according to any of the claims 1-18, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) and the second supporting surface (201) are in back of each other, the satellite antenna is in an operating state, the first radiator (6) is coupled with the floor through the other branch of the first tuning circuit to form a seventh resonant structure, the seventh resonant structure corresponds to a seventh frequency, the second radiator (7) is coupled with the floor through the other branch of the second tuning circuit to form an eighth resonant structure, the eighth resonant structure corresponds to an eighth frequency, and the third radiator (8) is used for generating a ninth resonance, wherein a resonance point frequency of the ninth resonance is in a third communication frequency band of the satellite antenna, the seventh frequency is higher than the third communication frequency band, and the eighth frequency is higher than the third communication frequency band.

20. The mobile terminal according to any of the claims 1-18, wherein the first housing (1) comprises a first support surface (101) for supporting the flexible display screen (200), the second housing (2) comprises a second support surface (201) for supporting the flexible display screen (200), and the third housing (3) comprises a third support surface (301) for supporting the flexible display screen (200);

When the first supporting surface (101) and the second supporting surface (201) are coplanar, the third supporting surface (301) and the second supporting surface (201) are back to back, the satellite antenna is in an operating state, the first radiator (6) is coupled with the floor through the other branch of the first tuning circuit to form a seventh resonant structure, the seventh resonant structure corresponds to a seventh frequency, the second radiator (7) is coupled with the floor through the other branch of the second tuning circuit to form an eighth resonant structure, the eighth resonant structure corresponds to an eighth frequency, and the third radiator (8) is used for generating a ninth resonance, wherein a frequency difference f79 of a resonance point frequency f9 of the seventh frequency f7 and the ninth resonance satisfies f79>10% f9, and a frequency difference f89 of a resonance point frequency f9 of the eighth frequency f8 and the ninth resonance satisfies f89>10% f9.

21. The mobile terminal of claim 20, wherein a frequency difference f79 between the seventh frequency f7 and a resonance point frequency f9 of the ninth resonance satisfies f79>100MHz, and wherein a frequency difference f89 between the eighth frequency f8 and the resonance point frequency f9 of the ninth resonance satisfies f89>100MHz.

22. The mobile terminal of any of claims 1-21, wherein the satellite antenna further comprises a first feed point (9), the satellite radio frequency link is coupled to the third radiator (8) through the first feed point (9), and when the first radiator (6) is disposed in the first housing (1), the second radiator (7) is disposed in the third housing (3), and when the third radiator (8) is disposed in the second housing (2), the distance between the first feed point (9) and the axis of the first spindle mechanism (4) is greater than the distance between the first feed point (9) and the axis of the second spindle mechanism (5).

23. The mobile terminal according to any of the claims 1-22, wherein the satellite antenna further comprises a third switching element (12), the third switching element (12) being coupled to the third radiator (8);

The satellite antenna is in a transmitting state when the third switch component (12) is in a first conducting state, and is in a receiving state when the third switch component (12) is in a second conducting state.

24. A mobile terminal according to claim 23, characterized in that the first radiator (6) is connected to a first branch of the first tuning circuit when the satellite antenna is in the transmitting state;

When the satellite antenna is in a receiving state, the first radiator (6) is connected to the second branch of the first tuning circuit.

25. The mobile terminal of claim 24, wherein the first radiator is coupled to the same leg of the first tuning circuit when the satellite antenna is in a transmitting state or a receiving state.

26. The mobile terminal according to any one of claims 1-25, wherein the mobile terminal has at least two folded states, and for any two of the folded states, when the satellite antenna is in an operational state, the first radiator is respectively connected to different branches of the first tuning circuit, and the second radiator is respectively connected to different branches of the second tuning circuit.

27. The mobile terminal of any of claims 1-25, wherein the mobile terminal is in different folded states, and the first radiator is connected to a same branch of the first tuning circuit and the second radiator is connected to a same branch of the second tuning circuit when the satellite antenna is in operation.

28. The mobile terminal of any of claims 1-27, wherein the first radiator is coupled to the first antenna rf link and configured to generate a first resonance when the satellite antenna is in a non-operational state, and a resonance point frequency of the first resonance is within a communication frequency band of the first antenna.

29. The mobile terminal of claim 28, wherein the mobile terminal controls the state of the first tuning circuit via a cellular radio frequency link.

30. A mobile terminal according to any of claims 1 to 29, wherein the mobile terminal controls the state of the second tuning circuit via a cellular radio frequency link or a satellite radio frequency link.