CN120711103A

CN120711103A - Foldable mobile terminal

Info

Publication number: CN120711103A
Application number: CN202410357365.3A
Authority: CN
Inventors: 余冬; 陈弋凌; 王吉康; 原琳; 薛亮; 胡飞扬; 张彬彬
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2024-03-26
Filing date: 2024-03-26
Publication date: 2025-09-26
Also published as: WO2025200673A1

Abstract

The foldable mobile terminal provided in the present application includes a first shell, a second shell, a first rotating shaft and an antenna system. The first shell and the second shell can be folded or unfolded relative to the first rotating shaft. The above-mentioned antenna system includes a first radio frequency chip, a first main radiator and a second main radiator. In the folded state, the orthographic projection of the side where the first main radiator is located in the thickness direction of the foldable mobile terminal coincides with the orthographic projection of the side where the second main radiator is located in the thickness direction of the foldable mobile terminal. The first main radiator is connected to a first phase shifter, and the second main radiator is connected to a second phase shifter. The first main radiator and the second main radiator of the foldable mobile terminal are both connected to phase shifters, which can be phase-shifted according to the different forms of the foldable mobile terminal, so that the first main radiator and the second main radiator work together to enhance the communication capability of the foldable mobile terminal provided in the present application.

Description

Foldable mobile terminal

Technical Field

The application relates to the technical field of electronic equipment, in particular to a foldable mobile terminal.

Background

With the rapid development of mobile communication technology and the popularization of smart phones, the demands of mobile terminals are increasing. Conventional smartphones are already powerful enough in functionality, but have certain limitations in portability and flexibility. To solve this problem, foldable mobile terminals have been developed. The foldable mobile terminal comprises a foldable support and a flexible screen, and the foldable support drives the flexible screen to unfold and fold. The user can unfold the mobile terminal to obtain a larger screen when needed, and can fold the mobile terminal when not needed, so that the size of the foldable mobile terminal is reduced, and the mobile terminal is convenient to carry.

However, the existing foldable mobile terminals have some problems in antenna system design. Due to the limitation of the layout and the connection mode of the antenna system, the antenna radiation efficiency and the working bandwidth of the antenna system of the foldable mobile terminal are still to be further improved, so that the communication performance and the communication stability of the foldable mobile terminal are improved.

Disclosure of Invention

The foldable mobile terminal provided by the application comprises the antenna system, and the communication capacity of the foldable mobile terminal is stronger by improving the antenna system.

In a first aspect, the present application provides a foldable mobile terminal. The foldable mobile terminal includes a first housing, a second housing, a first axis of rotation, and an antenna system. Wherein the first housing and the second housing are foldable or unfoldable with respect to the first rotation axis, thereby adjusting a display area of the foldable mobile terminal. The antenna system comprises a first radio frequency chip, a first main radiator and a second main radiator. The first main radiator is located at one side of the first shell, the second main radiator is located at one side of the second shell, and the first radio frequency chip is mounted on the first shell and/or the second shell. In the folded state, the orthographic projection of the side edge of the first main radiator in the thickness direction of the foldable mobile terminal coincides with the orthographic projection of the side edge of the second main radiator in the thickness direction of the foldable mobile terminal. It can be understood that the side edge of the first main radiator is parallel to the side edge of the second main radiator, and the side edge of the first main radiator and the side edge of the second main radiator are located at the same side of the foldable mobile terminal when the foldable mobile terminal is in a folded state. The first main radiator is connected with a first phase shifter, the first phase shifter is connected between the first main radiator and the first radio frequency chip, and the first phase shifter is used for adjusting the phase of a signal fed into the first main radiator. The second main radiator is connected with a second phase shifter, and the second phase shifter is connected between the second main radiator and the first radio frequency chip and is used for adjusting the phase of a signal fed into the second main radiator.

In the technical scheme of the application, the first main radiator and the second main radiator of the foldable mobile terminal are both connected with the phase shifter, so that the signal phase fed into the first main radiator and the signal phase fed into the second main radiator can be adjusted according to different forms of the foldable mobile terminal, so that the first main radiator and the second main radiator work cooperatively, and the antenna system is in a required better working state, for example, the working bandwidth of the antenna system is increased, and the antenna system has better radiation pattern distribution and the like. Thereby improving the communication capability of the foldable mobile terminal.

In one technical scheme, when the first shell and the second shell are in a folded state, the current distribution on the first main radiator and the current distribution on the second main radiator are in the same direction. Specifically, the phase of the signal fed into the first main radiator is adjusted by the first phase shifter, and/or the phase of the signal fed into the second main radiator is adjusted by the second phase shifter, so that the phase of the signal radiated on the first main radiator and the phase of the signal radiated on the second main radiator are in the same direction or opposite directions, and in a word, the feeding schemes of the first main radiator and the second main radiator are equivalent to symmetrical feeding. The first main radiator and the second main radiator work in the same frequency state, and the first main radiator and the second main radiator work cooperatively to improve the working bandwidth of the antenna system. The first main radiator and the second main radiator work in different working frequency bands, so that the working frequency band and the radiation efficiency of the antenna system are improved.

When the first shell and the second shell are in a folded state, the first main radiator and the second main radiator can be arranged opposite to each other or can be arranged in a staggered manner. For example. And when the first shell and the second shell are in a folded state, the orthographic projection of the first main radiator along the thickness direction of the foldable mobile terminal is at least partially overlapped with the orthographic projection of the second main radiator along the thickness direction of the foldable mobile terminal. The larger the area of the orthographic projection of the first main radiator along the thickness direction of the foldable mobile terminal, which coincides with the orthographic projection of the second main radiator along the thickness direction of the foldable mobile terminal, the more favorable the layout of the first main radiator and the second main radiator, so as to fully utilize the layout space of the antenna of the foldable mobile terminal.

In a specific technical scheme, the first shell comprises a first side, a second side and a third side which are sequentially connected, wherein the first side and the third side are respectively perpendicular to the extending direction of the first rotating shaft. The second shell comprises a fourth side edge, a fifth side edge and a sixth side edge which are sequentially connected, wherein the fourth side edge and the sixth side edge are respectively perpendicular to the extending direction of the first rotating shaft. In the folded state of the first and second shells, the first and fourth sides at least partially overlap, i.e. the first and second sides are on the same side. In this technical scheme, first main radiator is located the first side of first casing at least partially, and the second main radiator is located the fourth side of second casing at least partially. In this technical scheme, first main radiator is located the side adjacent with first pivot at least partially, and second main radiator is located the side also adjacent with first pivot at least partially, and first main radiator and second main radiator are located the same side of collapsible mobile terminal. In the scheme, the antenna system can have better performance in a folding state, a hovering state and a flattening state.

Specifically, the first side edge and the fourth side edge are both located at the top of the foldable mobile terminal. The scheme is beneficial to the foldable mobile terminal having better communication performance in the state that the user frequently uses the foldable mobile terminal.

The antenna system is a satellite antenna system and the antenna system of the foldable mobile terminal is used for communication with a communication satellite.

The foldable mobile terminal provided by the application can be a two-fold mobile terminal or a three-fold mobile terminal. When the foldable mobile terminal is a three-fold mobile terminal, the foldable mobile terminal further comprises a second rotating shaft and a third shell. Wherein the first shell, the first rotating shaft, the third shell, the second rotating shaft and the second shell are sequentially connected. I.e. the first housing and the second housing are located on both sides, it is convenient for the main radiator located in the first housing and the second housing to transmit or receive signals.

In a second aspect, the present application also provides a foldable mobile terminal including a first housing, a second housing, a first axis of rotation, and an antenna system. Wherein the first housing and the second housing are foldable or unfoldable with respect to the first rotation axis, thereby adjusting a display area of the foldable mobile terminal. The first shell comprises a first side edge, a second side edge and a third side edge which are sequentially connected, and the first side edge and the third side edge are respectively perpendicular to the extending direction of the first rotating shaft. The second shell comprises a fourth side, a fifth side and a sixth side which are sequentially connected, the fourth side and the sixth side are respectively perpendicular to the extending direction of the first rotating shaft, and the first side and the fourth side are located at the top of the foldable mobile terminal. The antenna system comprises a first radio frequency chip and a plurality of radiators, wherein the radiators are respectively connected with the first radio frequency chip, and the first radio frequency chip is used for feeding the radiators. The frequency range of the signals transmitted by the plurality of radiators is 1.7 GHz-5 GHz, and specifically, the antenna system works in a medium-high frequency band. The plurality of radiators comprise a first radiator, a second radiator, a third radiator, a fourth radiator and a fifth radiator, wherein the first radiator is positioned on the first side, the second radiator and the third radiator are respectively positioned on the second side, the fourth radiator is positioned on the third side, and the fifth radiator is positioned on the fourth side. Four radiators of the plurality of radiators work at the same frequency, at least one radiator of the four radiators is used for transmitting signals at the same time, and the four radiators are used for receiving signals at the same time. In the scheme, the radiating body working at the same frequency in the antenna system realizes a 1T4R working mode, so that the communication efficiency of the antenna system is improved, and the communication capacity of the foldable mobile terminal is improved.

According to the technical scheme, the foldable mobile terminal is in any pose, at least four radiators can work simultaneously through reasonable distribution, so that blind spots are not easy to occur in a directional diagram of the antenna system in any pose, and the communication effect of the foldable mobile terminal is improved.

In one embodiment, the plurality of radiators of the antenna system are connected to the same first rf chip. The antenna system is formed as a multiple-input multiple-output antenna system, and the capacity and the spectrum utilization rate of the communication system are improved in a multiple way without increasing the bandwidth.

For the arrangement of the first radio frequency chip, in one technical scheme, the first radio frequency chip is arranged on the first shell, and the radiator positioned on the second shell in the antenna system is connected with the first radio frequency chip through the flexible electric connecting piece. The scheme is beneficial to reducing the number of radio frequency chips of the foldable mobile terminal and reducing the cost of the foldable mobile terminal.

Further, a power amplifier is connected between the first radio frequency chip and a radiator positioned in the second shell. The power amplifier is used for processing signals emitted by the radiator outwards. The problem of large loss between the radiator of the second shell and the first radio frequency chip can be solved by arranging the power amplifier, and the working effect of the radiator positioned in the second shell is improved.

In addition, a low noise amplifier is also connected between the first radio frequency chip and the radiator positioned in the second shell. The low-noise amplifier is used for processing signals received by the radiator, so that the quality of the signals received by the radiator of the antenna system positioned on the second shell is improved, and the working effect of the antenna system is improved.

In another technical scheme, the antenna system comprises two first radio frequency chips, wherein one first radio frequency chip is arranged on the first shell and connected with a radiator positioned on the first shell. The other first radio frequency chip is arranged on the second shell and connected with the radiator positioned on the second shell. Each radiator is connected with the first radio frequency chip which is closer to the radiator, so that the loss of a signal transmission path can be reduced, and the communication capacity of the antenna system is improved.

The antenna system further comprises a control switch connected between the radiator of the antenna system and the first radio frequency chip. In addition, the control switch can be combined with the pose of the foldable mobile terminal to communicate the plurality of radiators with the first radio frequency chip. The control switch is used for communicating the plurality of radiators and the first radio frequency chip according to the intensity of signals transmitted by the radiators of the antenna system. The radiator with stronger transmission signal strength is favorable for being in a working state, so that the communication capacity of the foldable mobile terminal is improved.

In a third aspect, the present application also provides a foldable mobile terminal. The foldable mobile terminal includes a first housing, a second housing, a first axis of rotation, and an antenna system. Wherein the first housing and the second housing are foldable or unfoldable with respect to the first rotation axis, thereby adjusting a display area of the foldable mobile terminal. The first shell comprises a first side, a second side and a third side which are sequentially connected, wherein the first side and the third side are respectively perpendicular to the extending direction of the first rotating shaft, the second shell comprises a fourth side, a fifth side and a sixth side which are sequentially connected, the fourth side and the sixth side are respectively perpendicular to the extending direction of the first rotating shaft, and the first side and the fourth side are positioned at the top of the foldable mobile terminal. The antenna system comprises a first radio frequency chip and a plurality of radiators, the radiators are respectively connected with the first radio frequency chip, and the first radio frequency chip is used for feeding the radiators. The frequency range of the signals transmitted by the plurality of radiators is 600 MHz-960 MHz, namely the foldable mobile terminal works in a low-frequency band. The plurality of radiators comprises a sixth radiator, a seventh radiator, an eighth radiator and a ninth radiator, wherein the sixth radiator is located on the second side, the seventh radiator is located on the third side, the eighth radiator is located on the fifth side, and the ninth radiator is located on the sixth side. Two radiators in the plurality of radiators work at the same frequency, at least one radiator in the two radiators is used for transmitting signals, and the two radiators are simultaneously used for receiving signals. In the scheme, the radiating body working at the same frequency in the antenna system realizes a 1T2R working mode, so that the communication efficiency of the antenna system is improved, and the communication capacity of the foldable mobile terminal is improved.

The plurality of radiators of the antenna system are connected to the same first radio frequency chip. The antenna system is formed as a multiple-input multiple-output antenna system, and the capacity and the spectrum utilization rate of the communication system are improved in a multiple way without increasing the bandwidth.

When the radiator is specifically arranged, the distance between the upper edge of the sixth radiator facing the first side edge and the first side edge is smaller than the distance between the sixth radiator facing the first side edge and the third side edge. The distance between the upper edge of the eighth radiator facing the fourth side edge and the fourth side edge is smaller than that between the eighth radiator facing the fourth side edge and the sixth side edge. The scheme is beneficial to users in the state of using the foldable mobile terminal conventionally (hands are held at one side of the bottom of the foldable mobile terminal), the hands are not easy to shade signals, and the foldable mobile terminal has good communication performance.

Drawings

Fig. 1 is an expanded schematic view of a foldable mobile terminal according to an embodiment of the present application;

Fig. 2 is an expanded schematic view of a foldable mobile terminal according to an embodiment of the present application;

fig. 3 is a schematic folding view of a foldable mobile terminal according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application;

FIG. 5 is a schematic diagram of an antenna system according to an embodiment of the present application;

FIG. 6 is a schematic diagram of an antenna system according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an antenna system according to an embodiment of the present application;

FIG. 8 is a schematic diagram of an antenna system according to an embodiment of the present application;

FIG. 9 is a schematic side view of a foldable mobile terminal according to an embodiment of the present application;

fig. 10 is a schematic diagram illustrating an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application;

Fig. 11 is a schematic diagram illustrating an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application;

Fig. 12 is a schematic diagram showing the operation of an antenna system of the foldable mobile terminal of the comparative example in a folded state;

Fig. 13 is a graph comparing radiation efficiency of the antenna system of the foldable mobile terminal shown in fig. 10 and the antenna system of the foldable terminal shown in fig. 12;

Fig. 14 is a schematic diagram illustrating an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application;

fig. 15 is a schematic diagram illustrating an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application;

fig. 16 is a schematic diagram illustrating an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application;

Fig. 17 is a schematic diagram illustrating an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application;

Fig. 18 is a schematic diagram showing a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

fig. 19 is a schematic view showing a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

fig. 20 is a schematic diagram showing a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

fig. 21 is a schematic diagram showing a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application;

FIG. 22 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a hover state in an embodiment of the present application;

FIG. 23 is a left-hand polarization pattern of an antenna system with a foldable mobile terminal in a hover state in an embodiment of the present application;

FIG. 24 is a right hand polarization pattern of an antenna system with a foldable mobile terminal in a hover state in an embodiment of the present application;

fig. 25 is a schematic view showing a partial structure of an antenna system of the foldable mobile terminal in a flattened state according to an embodiment of the present application;

fig. 26 is a diagram of an antenna system of a foldable mobile terminal in a flattened state in accordance with an embodiment of the present application;

Fig. 27 is a schematic diagram illustrating the operation of an antenna system in different states of a foldable mobile terminal according to an embodiment of the present application;

Fig. 28 is a schematic diagram illustrating the operation of an antenna system in different states of a foldable mobile terminal according to an embodiment of the present application;

fig. 29 is a schematic diagram illustrating the operation of an antenna system in different states of a foldable mobile terminal according to an embodiment of the present application;

fig. 30 is a schematic structural view of a foldable mobile terminal according to an embodiment of the present application;

fig. 31 is a schematic structural view of a foldable mobile terminal according to an embodiment of the present application;

fig. 32 is a schematic structural view of a foldable mobile terminal according to an embodiment of the present application;

FIG. 33 is a schematic view of a foldable mobile terminal according to an embodiment of the present application;

34 a-34 e are schematic diagrams of the operation of the antenna system of the foldable mobile terminal in different positions;

fig. 35 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application.

Reference numerals:

11-a first housing;

111-first side, 112-second side;

113-a third side, 12-a second housing;

121-fourth side, 122-fifth side;

123-sixth side, 13-first rotating shaft;

14-a third shell, 15-a second rotating shaft;

a 2-flexible screen, a 3-antenna system;

31-a first radio frequency chip, 32-a first main radiator;

321-a first feed point, 322-a first end;

323-a second end, 33-a second primary radiator;

331-a second feed point, 332-a third end;

333-fourth terminal 34-first phase shifter;

35-a second phase shifter; a 36-power amplifier;

a first radiator, a second radiator, a third radiator, a fourth radiator, a fifth radiator, a sixth radiator, a fifth radiator;

39-a second radiator, 310-a third radiator;

311-fourth radiator, 312-fifth radiator;

313-tenth radiator, 314-eleventh radiator;

315-twelfth radiator, 316-sixth radiator;

317-seventh radiator, 318-eighth radiator;

319-ninth radiator, 4-system-on-chip;

5-son branches;

Z-thickness direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application 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 application. As used in the specification of the application 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 application. 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 application, an application scenario thereof is first described below. Fig. 1 is an expanded schematic view of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 1, the foldable mobile terminal according to an embodiment of the present application may include a foldable stand 1 and a flexible screen 2, the flexible screen 2 is mounted on the foldable stand 1, and the foldable stand 1 may change an expanded or folded configuration of the flexible screen 2 to form the foldable mobile terminal. Under different use demands, the foldable mobile terminal can have different display areas, so that the foldable mobile terminal has a larger display area, and meanwhile, the foldable mobile terminal has better portability.

Referring to fig. 1, the foldable stand 1 includes a first housing 11, a second housing 12, and a first rotating shaft 13, and the first housing 11 and the second housing 12 can be folded or unfolded with each other through the first rotating shaft 13. In the embodiment shown in fig. 1, the foldable mobile terminal is a two-fold mobile terminal, and in this embodiment, the first housing 11, the first rotating shaft 13, and the second housing 12 of the foldable mobile terminal are sequentially connected, and the first rotating shaft 13 is capable of moving, so that the first housing 11 and the second housing 12 are relatively folded or unfolded around the first rotating shaft 13, and the first housing 11 and the second housing 12 are switched between unfolding and folding.

Fig. 2 is an unfolding schematic diagram of a foldable mobile terminal according to an embodiment of the present application, and fig. 3 is a folding schematic diagram of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 2 and fig. 3, the foldable mobile terminal according to an embodiment of the present application may also be a three-fold mobile terminal, and the foldable mobile terminal includes a first housing 11, a first rotating shaft 13, a third housing 14, a second rotating shaft 15, and a second housing 12, where the first housing 11, the first rotating shaft 13, the third housing 14, the second rotating shaft 15, and the second housing 12 are sequentially connected. In this embodiment, the first housing 11 and the third housing 14 are rotated about the first rotation axis 13 to be folded or unfolded, and the third housing 14 and the second housing 12 are rotated about the second rotation axis 15 to be folded and unfolded, and the first housing 11 and the second housing 12 are also in a folded or unfolded relationship based on the first rotation axis 13, the third housing 14 and the second rotation axis 15 in between. The first housing 11 and the second housing 12 in the three-fold mobile terminal can also be folded or unfolded with each other by the first rotation shaft 13. The first housing 11, the third housing 14 and the second housing 12 are sequentially arranged in a state in which the foldable mobile terminal is unfolded, and the first housing 11, the third housing 14 and the second housing 12 are sequentially stacked in a state in which the foldable mobile terminal is folded. The first and second housings 11 and 12 are located at both sides in a folded state of the foldable mobile terminal, so that the main radiators located at the first and second housings 11 and 12 can transmit or receive signals.

In summary, the foldable mobile terminal in each embodiment of the present application may be a two-fold mobile terminal or a three-fold mobile terminal.

The first housing 11, the second housing 12, and/or the third housing 14 may respectively form an installation space for installing electronic components such as a circuit board, a battery, a receiver, a speaker, a camera, and the like of the electronic device. The circuit board can integrate electronic components such as a main controller, a storage unit, an antenna module, a power management module and the like of the electronic equipment, and the battery can supply power for the electronic components such as the flexible screen 2, the circuit board, the receiver, the loudspeaker, the camera and the like. In one possible design, at least two of the first housing 11, the second housing 12 and the third housing 14 are provided with installation spaces, and components of the electronic device are distributed in the respective housings. In another possible design, only one of the first housing 11, the second housing 12, or the third housing 14 may be provided with an installation space, and the components of the electronic device may be intensively distributed in the accommodation space.

The flexible screen 2 can be used to display information and provide an interactive interface for a user, and in embodiments of the present application, the flexible screen 2 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 LIGHT EMITTING diodes (QLED) display screen, or the like.

In an embodiment, taking a two-fold mobile terminal as an example, the flexible screen 2 is fixed on the surface of the foldable stand 1, and in particular, the flexible screen 2 may be continuously covered on the first housing 11, the first rotating shaft 13, and the second housing 12 of the foldable stand 1. The first housing 11 and the second housing 12 are respectively mounted on the first rotating shaft 13, and the first housing 11 and the second housing 12 are close to each other or far away from each other through the first rotating shaft 13, so as to realize folding or unfolding of the foldable mobile terminal. When the electronic device is folded, the first housing 11 and the second housing 12 of the foldable stand 1 are folded towards the flexible screen 2 by the first rotation shaft 13, and the flexible screen 2 is located between the first housing 11 and the second housing 12 in the folded state of the foldable mobile terminal. That is, the flexible screen 2 is positioned on the inner side surface of the foldable stand 1 when the electronic device is folded, forming an inward folding type foldable mobile terminal. Or when the electronic device is folded, the first housing 11 and the second housing 12 of the foldable stand 1 are folded away from the flexible screen 2 by the first rotation shaft 13, and the flexible screen 2 is located outside the first housing 11 and the second housing 12 in the folded state of the foldable mobile terminal. That is, the flexible screen 2 is positioned on the outer side surface of the foldable stand 1 when the electronic device is folded, forming an out-folded type foldable mobile terminal.

The first housing 11, the second housing 12, or the third housing 14 includes a frame, which may be formed of a conductive material such as metal or a nonconductive material such as plastic. The bezel may be disposed between the display screen and the rear cover and extend circumferentially around the periphery of the foldable mobile terminal. The bezel may have four sides surrounding the display screen to help secure the display screen.

In one implementation, the bezel, which primarily includes conductive material, may be referred to as a conductive bezel or a metal bezel of the foldable mobile terminal, suitable for use in industrial designs (industrial design, ID) of metallic 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 a foldable 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 foldable 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 exterior of the foldable 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.

By way of example, foldable mobile terminals may include, but are not limited to, cell phones, tablet computers, notebook computers, electronic book readers, cameras, wearable devices, home electronics devices, and the like. For ease of understanding, in the embodiments of the present application, a foldable mobile terminal will be described by taking a mobile phone as an example.

Hereinafter, terms that may appear in the embodiments of the present application will be explained.

As foldable mobile terminals include a variety of configurations during use, for example, foldable mobile terminals include a folded state, a hovering state, and a flattened state. For convenience of description, the angle between the first housing 11 and the second housing 12 described above is considered to be a first angle.

The folded state may also be referred to as a closed state, in which the first housing 11 and the second housing 12 of the foldable mobile terminal are completely folded and closed, and the first angle between the first housing 11 and the second housing 12 is 0 °, or in some embodiments, the first angle between the first housing 11 and the second housing 12 may be further between 0 ° and 45 °.

The hovering state refers to a state in which the first casing 11 and the second casing 12 are unfolded to a certain angle but are not completely flattened, for example, in the hovering state, the first angle between the first casing 11 and the second casing 12 may be between 45 ° and 175 °.

The flattened state refers to a state in which the first housing 11 and the second housing 12 of the foldable mobile terminal are fully unfolded, for example, in the flattened state, a first angle between the first housing 11 and the second housing 12 may be between 175 ° and 185 °, and specifically, a first angle between the first housing 11 and the second housing 12 may be 180 °.

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.

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 as part of the antenna system 3 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).

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.

The phase shifter is arranged between the radiator and the radio frequency chip and is positioned on a connecting line between the radiator and the radio frequency chip and used for adjusting the phase of a signal fed into the radiator. The phase of the signal fed into the radiator can be adjusted in particular by adjusting the electrical length of the connection line between the radiator and the radio frequency chip.

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.

Fig. 4 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application, and fig. 5 is a schematic structural diagram of an antenna system according to an embodiment of the present application, as shown in fig. 4 and fig. 5, in order to implement a communication function of the foldable mobile terminal, the foldable mobile terminal provided by the present application includes an antenna system 3, where the antenna system 3 includes a first radio frequency chip 31, a first main radiator 32, a second main radiator 33, a first phase shifter 34 and a second phase shifter 35. The first phase shifter 34 is connected to the first main radiator 32 and connected to the first rf chip 31 to realize feeding of the first main radiator 32, and the first phase shifter 34 is used for adjusting the phase of the signal fed into the first main radiator 32. Specifically, the first phase shifter 34 is coupled to the first main radiator 32 through a matching circuit. The second phase shifter 35 is connected between the second main radiator 33 and the first rf chip 31 to realize feeding of the second main radiator 33, and the second phase shifter 35 is used for adjusting the phase of the signal fed into the second main radiator 33. Specifically, the second phase shifter 35 is coupled to the second main radiator 33 through a matching circuit.

With continued reference to fig. 5, in an embodiment of the present application, the first rf chip 31 may be disposed in a plurality of ways, for example, in a specific embodiment, the foldable movement may include a first rf chip 31, the first rf chip 31 is mounted on the first housing 11, the first main radiator 32 located in the first housing 11 does not need to be connected to the first rf chip 31 by a span axis, and the second main radiator 33 located in the second housing 12 is connected to the first rf chip 31 by a span axis of a flexible electrical connector, for example, the flexible electrical connector may be an electrical connector such as a flexible circuit board, a strip line or a jumper. The above-mentioned "span axis" means that the electrical connector spans the first rotation axis between the first housing 11 and the second housing 12.

With continued reference to fig. 5, in order to improve the signal transmission efficiency between the second main radiator 33 and the first rf chip 31 of the second housing 12, in one embodiment, a low noise amplifier (low noise amplifier, LNA) 37 is connected between the first rf chip 31 and the second main radiator 33 of the second housing 12, and the low noise amplifier 37 is connected to a receiving port (RX) of the first rf chip 31 for processing signals received by the second main radiator 33. The low noise amplifier 37 can compensate for the problem of larger loss between the second main radiator 33 of the second housing 12 and the first radio frequency chip 31, and improve the signal receiving capability of the antenna system 3, thereby improving the working effect of the antenna system 3. In a specific embodiment, a power amplifier 36 is connected to each of the second main radiators 33 of the second housing 12, which radiate signals outwards.

Fig. 6 is a schematic structural diagram of an antenna system according to an embodiment of the present application, as shown in fig. 6, in an embodiment, a Power Amplifier (PA) 36 is connected between the rf chip and a radiator located in the second housing 12, or the power amplifier 36 and the low noise amplifier 37 are connected together. The power amplifier 36 is connected to a transmit port (TX) of the first radio frequency chip 31 for processing the signal emitted by the radiator. The power amplifier 36 can compensate for the problem of larger loss between the second main radiator 33 of the second housing 12 and the first radio frequency chip 31, and improve the signal transmitting capability of the antenna system 3, thereby improving the working effect of the antenna system 3. In a specific embodiment, each of the second main radiators 33 of the second housing 12 receiving a radiation signal is connected with a low noise amplifier 37, and each low noise amplifier 37 corresponds to one signal transmission channel. For example, the low noise amplifier 37 connected by a broken line in fig. 6 indicates that if the second housing is provided with another second main radiator 33, the low noise amplifier 37 is provided in a connection manner of the signal transmission path shown by a broken line.

With continued reference to fig. 6, in one embodiment, a power amplifier 36 and a low noise amplifier 37 are connected to the second main radiator 33 in the second housing 12 for both transmitting and receiving signals. Fig. 7 is a schematic structural diagram of an antenna system according to an embodiment of the present application, as shown in fig. 7, when the antenna system is specifically configured, a power amplifier 36 and a low noise amplifier 37 are connected to the second main radiator 33 located in the second housing 12, so that the power amplifier 36 and the low noise amplifier 37 can be integrated into a front-end module (FEM) to improve the integration level of the antenna system 3.

Fig. 8 is a schematic structural diagram of an antenna system according to an embodiment of the present application, as shown in fig. 8, in which the antenna system 3 of a foldable mobile terminal includes two first rf chips 31, wherein one of the first rf chips 31 is mounted on the first housing 11, and the first rf chip 31 located in the first housing 11 is connected to a radiator located in the first housing 11. The other first rf chip 31 is mounted on the second housing 12, and the first rf chip 31 located in the second housing 12 is connected to the radiator located in the second housing 12. In a specific embodiment, the two first rf chips 31 of the antenna system 3 are respectively connected to the system-on-chip 4 to cooperatively work. In this embodiment, each radiator is connected to the first rf chip 31 that is closer to the radiator, so that the loss of the signal transmission path can be reduced, and the communication capability of the antenna system 3 can be improved.

In a specific embodiment, the two first rf chips 31 may have various configurations, for example, the first rf chip 31 located in the first housing 11 may support communication of 2T4R, and the first rf chip 31 located in the second housing 12 may support communication of 1T 2R. Alternatively, the first rf chip 31 located in the first housing 11 may be made to support communication of 1T4R, and the first rf chip 31 located in the second housing 12 may be made to support communication of 1T 4R. Alternatively, the first rf chip 31 located in the first housing 11 may be made to support communication of 1T4R, and the first rf chip 31 located in the second housing 12 may be made to support communication of 1T 2R. Alternatively, the first rf chip 31 located in the first housing 11 may be made to support communication of 1T2R, and the first rf chip 31 located in the second housing 12 may be made to support communication of 1T 2R.

Note that, in xTyR of the present application, xT (x transmit) represents x radiators of the radiators connected to the radio frequency chip of the antenna system for transmitting signals, and yR (y receive) represents y radiators of the radiators connected to the radio frequency chip of the antenna system for receiving signals. Wherein x and y are positive integers respectively.

In alternative embodiments, the first rf chip 31 may be a cellular chip, or the first rf chip 31 may also be a satellite rf chip. In summary, the antenna system 3 in the technical solution provided by the present application may be applied to implement cellular communication as well as satellite communication. When the first rf chip 31 is a satellite rf chip, the antenna system 3 of the foldable mobile terminal is a satellite antenna system 3 for communicating with a communication satellite. Satellite communications include at least one of receiving and/or sending short messages (also known as short messages), calling and/or answering calls, data services (e.g., surfing the internet), etc.

Fig. 9 is a schematic side view of a foldable mobile terminal according to an embodiment of the present application, and referring to fig. 4 and 9, the first main radiator 32 is located on one side of the first housing 11, and the second main radiator 33 is located on one side of the second housing 12. In the folded state, the front projection of the side edge of the first main radiator 32 in the thickness direction Z of the foldable mobile terminal coincides with the front projection of the side edge of the second main radiator 33 in the thickness direction Z of the foldable mobile terminal. It will be appreciated that the side edge of the first main radiator 32 on the first housing 11 is parallel to the side edge of the second main radiator 33 on the second housing 12, and that the side edge of the first main radiator 32 and the side edge of the second main radiator 33 are on the same side of the foldable mobile terminal when the foldable mobile terminal is in the folded state.

In the technical scheme of the application, in one embodiment, when the first main radiator 32 and the second main radiator 33 of the foldable mobile terminal are used as transmitting antennas, the same transmitting radio frequency channel can be shared to be used as one transmitting antenna, and in one embodiment, when the first main radiator 32 and the second main radiator 33 are used as receiving antennas, the same receiving radio frequency channel can be shared to be used as one receiving antenna. For ease of understanding, the first main radiator 32 and the second main radiator 33, which share one radio frequency channel and operate simultaneously, can be regarded as constituting an antenna array. In one embodiment, the first main radiator 32 and the second main radiator 33 of the foldable mobile terminal are connected with phase shifters, so that the signal phase fed into the first main radiator 32 and the signal phase fed into the second main radiator 33 can be adjusted according to different forms of the foldable mobile terminal, so that the first main radiator 32 and the second main radiator 33 work cooperatively, and the antenna system 3 is in a better working state as required, for example, the working bandwidth of the antenna system 3 is increased, the antenna system 3 has better radiation pattern distribution, and the like. Thereby improving the communication capability of the foldable mobile terminal.

In one embodiment, the frequency range of the signal transmitted by the antenna system 3 of the foldable mobile terminal is 1.7 ghz-5 ghz, which can be understood that the antenna system 3 works in a middle-high frequency band.

Fig. 10 is a schematic diagram illustrating an operation of an antenna system of the foldable mobile terminal in a folded state according to an embodiment of the present application, as shown in fig. 9 and 10, in an embodiment, in which the first housing 11 and the second housing 12 are in a folded state, by adjusting the signal phase fed into the first main radiator 32 and the signal phase of the second main radiator 33, the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are in the same direction. For example, in a specific embodiment, the phase of the signal fed to the first main radiator 32 is adjusted by the first phase shifter 34, and/or the phase of the signal fed to the second main radiator 33 is adjusted by the second phase shifter 35 such that the phase of the signal radiated on the first main radiator 32 is the same or opposite to the phase of the signal radiated on the second main radiator 33. In one embodiment, the feeding scheme of the first main radiator 32 and the second main radiator 33 can be regarded as equivalent to symmetrical feeding. Specifically, the same or opposite phases of the signals on the two main radiators are related to the positions of the feeding points of the two main radiators. For example, in the embodiment shown in fig. 10, the first feeding point 321 of the first main radiator 32 and the arrangement direction of the first main radiator 32, and the second feeding point 331 of the second main radiator 33 and the arrangement direction of the second main radiator 33 are the same. In a specific embodiment, the first feeding point 321 is located at an end of the first main radiator 32 away from the first rotation axis 13, and the second feeding point 331 is also located at an end of the second main radiator 33 away from the first rotation axis 13. The phase of the signal radiated on the first main radiator 32 and the phase of the signal radiated on the second main radiator 33 can be adjusted to be in the same direction during the actual operation of the antenna system 3, so that the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are in the same direction. Or fig. 11 is a schematic diagram illustrating an operation of an antenna system of the foldable mobile terminal in a folded state according to an embodiment of the present application, in the embodiment shown in fig. 11, the first feeding point 321 of the first main radiator 32 is aligned with the first main radiator 32, and the second feeding point 331 of the second main radiator 33 is aligned with the second main radiator 33 in the opposite direction. In a specific embodiment, the first feeding point 321 is located at an end of the first main radiator 32 away from the first rotation axis 13, and the second feeding point 331 is also located at an end of the second main radiator 33 close to the first rotation axis 13. The phase of the signal radiated on the first main radiator 32 and the phase of the signal radiated on the second main radiator 33 can be adjusted to be opposite during the actual operation of the antenna system 3, so that the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are in the same direction.

In the operating state, the first main radiator 32 and the second main radiator 33 in the antenna system 3 of the foldable mobile terminal operate in the same frequency state, and the first main radiator 32 and the second main radiator 33 cooperate to improve the operating bandwidth of the antenna system 3.

The current distribution on the first and second main radiators 33 mentioned in the embodiments of the present application is the same/opposite, and it is understood that the directions of the main currents on the first and second main radiators are the same/opposite. The main current on the radiator can be understood as the main current of the radiator at the center frequency point of its operating frequency band. It should also be understood that in the embodiments of the present application, the first main radiator and the second main radiator are both linearly extending main radiators, and the main current refers to a current flowing from one end to the other end of the main radiator.

Fig. 12 is a schematic diagram showing the operation of an antenna system of the foldable mobile terminal in the folded state in the comparative example, and the comparative example shown in fig. 12 is different from the antenna system 3 of the foldable mobile terminal in the embodiment shown in fig. 10 in that, of the first main radiator 32 and the second main radiator 33, only the second main radiator 33 includes one feeding point, the second main radiator 33 serves as a main feeding radiator, and the first main radiator 32 serves as a parasitic radiator. In the comparative example shown in fig. 12, each main radiator includes two currents, so that the entire antenna system 3 forms two sets of current distributions. Wherein, a group of current distribution is the current shown by the broken line in the figure, wherein, the current generated by the second main radiator 33 is stronger, and the current generated by the first main radiator 32 is weaker, so that the energy distribution of the first main radiator 32 and the second main radiator 33 is uneven. Further, another set of current distribution is the current shown by the solid line in the figure, wherein the direction of the current distribution generated by the first main radiator 32 is opposite to the direction of the current distribution generated by the second main radiator 33, and the energy of the first main radiator 32 attenuates the energy of the second main radiator 33. And as the operating frequency band increases, energy is limited between the first housing 11 and the second housing 12, and it is difficult to radiate to the external space, and therefore, the bandwidth of the antenna system 3 in the comparative example is also difficult to increase.

Fig. 13 is a graph comparing radiation efficiency of the antenna system of the foldable mobile terminal shown in fig. 10 and that of the antenna system of the foldable mobile terminal shown in fig. 12, as shown in fig. 13, wherein a dotted line shows a radiation efficiency curve of the antenna system 3 in the comparative example shown in fig. 12, and the radiation efficiency curve of the antenna system 3 of the foldable mobile terminal provided by the present application is shown. As shown in fig. 13, the antenna system 3 of the comparative example shown in fig. 12 generates a radiation efficiency pit, and the antenna system 3 of the foldable mobile terminal of the present application has a good radiation efficiency in a wide operating bandwidth. In particular, the antenna system 3 of the foldable mobile terminal of the present application also has higher radiation efficiency in the frequency band where the antenna system 3 in the comparative example has the radiation efficiency pits. It can be seen that the antenna system 3 of the foldable mobile terminal of the present application has a relatively wide operating bandwidth.

In an operating state, the first main radiator 32 and the second main radiator 33 in the antenna system 3 of the foldable mobile terminal operate in different operating frequency bands. At this time, the first main radiator 32 operates in a first frequency band, and the second main radiator 33 operates in a second frequency band, which are different from each other but may be partially overlapped. The phase of the signal fed to the first main radiator 32 is adjusted by the first phase shifter 34 and/or the phase of the signal fed to the second main radiator 33 is adjusted by the second phase shifter 35 such that the current distribution on the first main radiator 32 is co-current with the current distribution on the second main radiator 33. The working frequency band and the radiation efficiency of the antenna system 3 are improved. For example, the first main radiator 32 operates at B3 and B1, and the second main radiator 33 operates at B7, so that the operating frequency band of the antenna system 3 may include b3+b1+b7. Wherein B1 is band1, which refers to a working frequency band of 1920MHz to 2170MHz, B3 is band3, which refers to a working frequency band of 1710MHz to 1880MHz, B7 is band7, which refers to a working frequency band of 2500MHz to 2690MHz.

The specific structure of the first and second main radiators 32 and 33 in the embodiment of the present application has various choices, for example, both ends of the first main radiator 32 in the present application include a first end 322 and a second end 323. As shown in fig. 10, in one embodiment, the first end 322 of the first main radiator 32 is an open end, and the first feeding point 321 is located at the first end 322, and the second end 323 is a ground end. In one embodiment, the middle of the first main radiator 32 is slotted such that the first main radiator 32 is formed of two knuckles. In one embodiment, the first main radiator 32 has a capacitor at both ends of the slit. In one embodiment, the first main radiator 32 may be implemented by a conductive portion of the bezel, the first end 322 of the first main radiator 32 may be implemented by a slit, and the second end 323 may not be slit. In one embodiment, the first end 322 and the second end 323 of the first main radiator 32 are respectively provided with slits, as shown in fig. 11, the first feeding point 321 is located at the second end 323, and the first end 322 is grounded to form a grounding end. Fig. 14 is a schematic diagram illustrating an operation of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application, as shown in fig. 14, in an embodiment, a first end 322 of a first main radiator 32 is an open end, a second end 323 is a ground end, and a middle of the first main radiator 32 is not slotted.

Similarly, the two ends of the second main radiator 33 include a third end 332 and a fourth end 333, as shown in fig. 10, in one embodiment, the third end 332 of the second main radiator 33 is an open end, and the second feeding point 331 is located at the third end 332, and the fourth end 333 is grounded. In one embodiment, the middle of the second main radiator 33 is slotted, so that the second main radiator 33 is formed by two knots. In one embodiment, capacitors are provided at both ends of the slit in the second main radiator 33. In one embodiment, the second main radiator 33 may be implemented by a conductive portion of the bezel, the first end 322 of the first main radiator 32 may be implemented by a slit, and the second end 323 may not be slit. In one embodiment, the third end 332 and the fourth end 333 of the second main radiator 33 are respectively slotted, as shown in fig. 11, the second feeding point 331 is located at the fourth end 333, and the third end 332 is grounded to form a ground end. In one embodiment, as shown in fig. 14, the third end 332 of the second main radiator 33 is an open end, the fourth end 333 is a ground end, and the middle of the second main radiator 33 is not slotted.

In the embodiment of the present application, the first main radiator 32 and the second main radiator 33 may be the same or different, which is not limited in the present application. As shown in fig. 14, in one embodiment, the first main radiator 32 and the second main radiator 33 are identical. Fig. 15 is a schematic diagram illustrating an operation of an antenna system of the foldable mobile terminal in a folded state according to an embodiment of the present application, as shown in fig. 15, in an embodiment, the first main radiator 32 and the second main radiator 33 are different.

The formation manner of the capacitor in the embodiment of the present application is not limited, and for example, the capacitor may be a lumped capacitor and/or a distributed capacitor. As shown in fig. 15, in one embodiment, a sub-branch 5 may be disposed beside the main radiator, with the sub-branch 5 being coupled with the branch of the main radiator to form a capacitor. In fig. 15, taking an example of providing a sub-branch 5 at a slit in the middle of the first main radiator 32, as shown in fig. 15, in one embodiment, the sub-branch 5 may be connected to the first main radiator 32, and the sub-branch 5 is used to form a capacitor of the first main radiator 32, so that the sub-branch 5 may be connected to the first main radiator 32. Fig. 16 is a schematic working diagram of an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 16, in an embodiment, the sub-branches 5 may be further separated from the main radiator by a certain coupling distance, without an actual physical connection relationship. The formation of the equivalent capacitance is illustrated in fig. 15 and 16 by taking one sub-branch 5 as an example, or in one embodiment, the equivalent capacitance may be formed by cross-coupling a plurality of sub-branches.

Fig. 17 is a schematic diagram of a partial structure of an antenna system of a foldable mobile terminal in a folded state according to an embodiment of the present application, as shown in fig. 17, in one embodiment, the first main radiator 32 may include two sections of radiators, where the two sections of radiators feed separately, but the two radiators are connected in series through an electrical device. In a specific embodiment, the electrical device may be a capacitor. When the electric device is specifically arranged, the electric device can be arranged on a printed circuit board or a flexible circuit board and other structures. Similarly, the second main radiator 33 may also include two sections of radiators, which are fed separately, but are connected in series through an electrical device. In a specific embodiment, the electrical device may be a capacitor.

It should be noted that, in the embodiment of the present application, a slit is formed in the middle of the main radiator, or the end of the main radiator and the adjacent metal structure are slit, where the slit may also form an equivalent capacitor, without adding any additional branches or devices.

The first main radiator 32 and the second main radiator 33 may be disposed opposite to each other or may be disposed offset from each other when the first housing 11 and the second housing 12 are folded. For example, in the embodiment shown in fig. 10 and 11, the orthographic projection of the first main radiator 32 in the thickness direction Z of the foldable mobile terminal is at least partially coincident with the orthographic projection of the second main radiator 33 in the thickness direction Z of the foldable mobile terminal. Specifically, as shown in fig. 10 and 11, in one embodiment, the front projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal completely coincides with the front projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal. Fig. 18 is a schematic diagram of a partial structure of an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 18, in one embodiment, an orthographic projection of a first main radiator 32 along a thickness direction Z of the foldable mobile terminal is partially overlapped with and partially staggered from an orthographic projection of a second main radiator 33 along the thickness direction Z of the foldable mobile terminal. Fig. 19 is a schematic view showing a partial structure of an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 19, in an embodiment, an orthographic projection of a first main radiator 32 along a thickness direction Z of the foldable mobile terminal is overlapped with an orthographic projection portion of a second main radiator 33 along the thickness direction Z of the foldable mobile terminal. Specifically, the length of the second main radiator 33 is smaller than the length of the first main radiator 32, and the orthographic projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal is completely located within the orthographic projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal. Fig. 20 is a schematic diagram of a partial structure of an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 20, in one embodiment, an orthographic projection of a first main radiator 32 along a thickness direction Z of the foldable mobile terminal is completely misaligned with an orthographic projection of a second main radiator 33 along the thickness direction Z of the foldable mobile terminal. The first main radiator 32 and the second main radiator 33 may be disposed in a staggered manner when the first housing 11 and the second housing 12 are in a folded state, so that the first main radiator 32 and the second main radiator 33 may cooperate. In the embodiment of the present application, when the first housing 11 and the second housing 12 are in the folded state, the larger the area of the front projection of the first main radiator 32 along the thickness direction Z of the foldable mobile terminal, which coincides with the front projection of the second main radiator 33 along the thickness direction Z of the foldable mobile terminal, the more advantageous is to layout the first main radiator 32 and the second main radiator 33, so as to make full use of the layout space of the antenna of the foldable mobile terminal.

Fig. 21 is a schematic view showing a partial structure of an antenna system in a folded state of a foldable mobile terminal according to an embodiment of the present application, where, as shown in fig. 10, 11 and 21, the first main radiator 32 and the second main radiator 33 are all slotted in the middle, and in the folded state of the foldable mobile terminal, the slots in the middle of the first main radiator 32 and the slots in the middle of the second main radiator 33 may be aligned. In an embodiment, the first main radiator 32 and the second main radiator 33 may be implemented by conductive portions of a frame, and in a possible implementation manner, the slits are visible on an outer section of the foldable mobile terminal, so that the scheme is beneficial to improving the regularity and the aesthetic appearance of the foldable mobile terminal. In a specific embodiment, as shown in fig. 10 and 11, the first end 322 of the first main radiator 32 is aligned with the third end 332 of the second main radiator 33, and the second end 323 of the first main radiator 32 is aligned with the fourth end 333 of the second main radiator 33. In a specific embodiment, as shown in fig. 21, in one embodiment, the first end 322 of the first main radiator 32 and the third end 332 of the second main radiator 33 are not aligned, and the second end 323 of the first main radiator 32 and the fourth end 333 of the second main radiator 33 are aligned. As shown in fig. 18, in one embodiment, a slot is formed in the middle of the first main radiator 32, and the slot in the middle of the first main radiator 32 is aligned with the third end 332 of the second main radiator 33. As shown in fig. 19, in one embodiment, the second main radiator 33 has a central slit, the slit in the middle of the second main radiator 33 being aligned with the first end 322 of the first main radiator 32, and the fourth end 333 of the second main radiator 33 being aligned with the second end 323 of the first main radiator 32. As shown in fig. 20, in one embodiment, the second end 323 of the first primary radiator 32 is aligned with the third end 332 of the second primary radiator 33.

Fig. 22 is a schematic diagram showing a partial structure of an antenna system of a foldable mobile terminal in a hovering state in an embodiment of the present application, as shown in fig. 22, in an embodiment, in which the first housing 11 and the second housing 12 are in a hovering state. By adjusting the signal phase fed to the first main radiator 32 and the signal phase of the second main radiator 33, the current distribution on the first main radiator 32 and the current distribution on the second main radiator 33 are adjusted. So that the circular polarization of the antenna system 3 is enhanced and the pattern characteristics are adjusted. In a specific embodiment, the first housing 11 and the second housing 12 are unfolded to a first angle, where the first angle is between 45 ° and 135 °, so that the user can use the foldable mobile terminal in a hovering state of the foldable mobile terminal.

Fig. 23 is a left-hand polarization pattern of an antenna system in a hovering state of a foldable mobile terminal according to an embodiment of the present application, specifically, fig. 23 shows a left-hand polarization pattern of the antenna system 3 when a first main radiator 32 and a second main radiator 33 of the antenna system 3 have different phase differences, and fig. 24 is a right-hand polarization pattern of the antenna system in a hovering state of a foldable mobile terminal according to an embodiment of the present application, specifically, fig. 24 shows a right-hand polarization pattern of the antenna system 3 when the first main radiator 32 and the second main radiator 33 of the antenna system 3 have different phase differences. Referring to fig. 23 and 24, in the embodiment of the present application, the phase of the signal fed into the first main radiator 32 is adjusted by the first phase shifter 34, and the phase of the signal fed into the second main radiator 33 is adjusted by the second phase shifter 35, so that the left-hand polarization direction and the right-hand polarization direction of the antenna system 3 can be adjusted, so as to improve the communication effect of the antenna system 3. For example, the antenna system 3 is a satellite antenna system 3 for communication with a satellite communication system. The antenna system 3 in this embodiment may adjust the left-hand polarization direction and the right-hand polarization direction of the antenna system 3, so that the maximum radiation direction in the left-hand planned direction and the maximum radiation direction in the right-hand polarization direction face the zenith direction, so as to facilitate communication with satellites in the sky. As shown in FIG. 23, the left-hand polarization direction of the antenna system 3 can be within the range of-80 DEG to-175 DEG, and as shown in FIG. 24, the right-hand polarization direction of the antenna system 3 can be within the range of-4 dBIC to-5 DEG to-263 deg. Specifically, the application adjusts the patterns of the first main radiator 32 and the second main radiator 33 in the left-hand direction and the right-hand direction through phase modulation, so that the left-hand direction can be improved according to the requirement, or the right-hand direction can be improved, and the left-hand direction and the right-hand direction can be improved, so that the foldable mobile terminal has good communication effect when being applied to different satellite scenes.

In a specific embodiment, the first angle of deployment of the first housing 11 and the second housing 12 is between 85 ° and 100 °. In this embodiment, the current distribution direction on the first main radiator 32 is in a substantially orthogonal angle relation with the current distribution direction on the second main radiator 33, which is advantageous for further enhancing the circular polarization of the antenna system 3.

Fig. 25 is a schematic view showing a partial structure of an antenna system of the foldable mobile terminal in a flattened state according to an embodiment of the present application, as shown in fig. 25, in an embodiment, in which the first housing 11 and the second housing 12 are in a flattened state. By adjusting the signal phase fed to the first main radiator 32 and the signal phase of the second main radiator 33, the current distribution on the first main radiator 32 is made to be the same as the current distribution on the second main radiator 33. So that the antenna system 3 achieves a narrow beam scan. In a specific embodiment, the first housing 11 and the second housing 12 are unfolded to a first angle, and the first angle is located between 175 ° and 185 °, so that the user can use the foldable mobile terminal in the flattened state of the foldable mobile terminal. In a specific embodiment, the first angle may be 180 ° when the first housing 11 and the second housing 12 are in the flattened state, which is beneficial to making the display screen of the foldable mobile terminal relatively flat.

Fig. 26 is a diagram of an antenna system of a foldable mobile terminal in a flattened state according to an embodiment of the present application, and specifically, fig. 26 shows a diagram of the antenna system 3 when the first main radiator 32 and the second main radiator 33 of the antenna system 3 exhibit different phase differences. In the embodiment of the present application, the signal phase fed into the first main radiator 32 is adjusted by the first phase shifter 34, and the signal phase of the second main radiator 33 is adjusted by the second phase shifter 35, so that the directivity pattern of the antenna system 3 can be adjusted, and a better directivity pattern can be obtained, so as to facilitate the improvement of the communication effect of the antenna system 3.

Fig. 27 is a schematic diagram of the operation of an antenna system in different states of a foldable mobile terminal according to an embodiment of the present application, and fig. 28 is a schematic diagram of the operation of an antenna system in different states of a foldable mobile terminal according to an embodiment of the present application. As shown in fig. 27 and 28, in one embodiment, the first housing 11 includes a first side 111, a second side 112, and a third side 113 that are sequentially connected, where the first side 111 and the third side 113 are perpendicular to the extending direction of the first rotation shaft 13, and the second side 112 may be parallel to the extending direction of the first rotation shaft 13. The second housing 12 includes a fourth side 121, a fifth side 122, and a sixth side 123 connected in sequence, the fourth side 121 and the sixth side 123 are perpendicular to the extending direction of the first rotating shaft 13, and the fifth side 122 may be parallel to the extending direction of the first rotating shaft 13. The first main radiator 32 is at least partially located on the first side 111 of the first housing 11, the second main radiator 33 is at least partially located on the fourth side 121 of the second housing 12, and the first side 111 and the fourth side 121 are located on the same side of the foldable mobile terminal. In one embodiment, the first side 111 and the fourth side 121 are connected by a first shaft 13, and the first housing 11 and the second housing 12 are in a folded state, and the first side 111 and the fourth side 121 at least partially overlap. In the unfolded state of the foldable mobile terminal, the first main radiator 32 and the second main radiator 33 extend along the straight line direction, and in the folded state of the foldable mobile terminal, the first main radiator 32 and the second main radiator 33 are coupled to operate, and specifically, the first main radiator 32 and the second main radiator 33 can be at least partially overlapped. The first main radiator 32 is at least partially located on the side adjacent to the first axis of rotation 13, and the second main radiator 33 is also at least partially located on the side adjacent to the first axis of rotation 13, and the first main radiator 32 and the second main radiator 33 are located on the same side of the foldable mobile terminal. In this solution, it is advantageous that the antenna system 3 can have better performance in the folded state, the hovering state and the flattened state.

As shown in fig. 27, the foldable mobile terminal in the embodiment of the present application may be a large-folded foldable mobile terminal, and the length of the second side 112 of the foldable mobile terminal is greater than the lengths of the first side 111 and the third side 113. In this embodiment, the first side 111 and the fourth side 121 are located at the top of the foldable mobile terminal, where the application icon is in an up state when the user uses the foldable mobile terminal in a normal state. In one embodiment, the top may refer to a direction in which an earpiece of the foldable mobile terminal is located, and the direction in which the microphone is located is a bottom of the foldable mobile terminal. The scheme is beneficial to the foldable mobile terminal having better communication performance in the state that the user frequently uses the foldable mobile terminal.

As shown in fig. 28, the foldable mobile terminal in the embodiment of the present application may be a small-folded foldable mobile terminal, and the sum of the lengths of the first side 111 and the fourth side 121 of the foldable mobile terminal is greater than the length of the second side 112. The first rotating shaft 13 extends transversely, and the second side 112 is located at the top of the foldable mobile terminal.

In the embodiment of the present application, the first main radiator 32 is at least partially located on the first side 111 of the first housing 11, and the second main radiator 33 is at least partially located on the fourth side 121 of the second housing 12. In a specific implementation, the distance of the first main radiator 32 from the first axis of rotation 13 may be made smaller than the distance of the first main radiator 32 from the second side 112, i.e. the first main radiator 32 is located on the side of the first side 111 close to the first axis of rotation 13. Specifically, the distance between the first main radiator 32 and the first shaft 13 refers to the distance between the edge of the first main radiator 32 facing the first shaft 13 and the axis of the first shaft 13, and the distance between the first and second sides 112 refers to the distance between the second main radiator 33 facing the second side 112 and the second side 112.

In a further implementation, the ground of the first main radiator 32 is connected to the first shaft 13, and the ground of the second main radiator 33 is also connected to the first shaft 13, so that the common ground of the first main radiator 32 and the second main radiator 33 is achieved.

Fig. 29 is a schematic diagram illustrating the operation of the antenna system in different states of the foldable mobile terminal according to the embodiment of the present application, as shown in fig. 29, in some embodiments, the first main radiator 32 may be located at least partially on the second side 112 of the first housing 11, and the second main radiator 33 may be located at least partially on the fifth side 122 of the second housing 12. In this embodiment, the first main radiator 32 and the second main radiator 33 are apart in the unfolded state of the foldable mobile terminal, and the first main radiator 32 and the second main radiator 33 are close to each other in the folded state of the foldable mobile terminal.

Fig. 30 is a schematic structural view of a foldable mobile terminal according to an embodiment of the present application, and as shown in fig. 30, a first housing 11 of a foldable mobile terminal according to the present application further includes a first side 111, a second side 112, and a third side 113 sequentially connected, the first side 111 and the third side 113 being perpendicular to an extending direction of a first rotating shaft 13, respectively, and the second housing 12 includes a fourth side 121, a fifth side 122, and a sixth side 123 sequentially connected, the fourth side 121 and the sixth side 123 being perpendicular to the extending direction of the first rotating shaft 13, respectively, and the first side 111 and the fourth side 121 being located at a top of the foldable mobile terminal. The top is the top in which the application icon is in an upward state when the user uses the foldable mobile terminal in a normal state. In one embodiment, the top may refer to a direction in which an earpiece of the foldable mobile terminal is located, and the direction in which the microphone is located is a bottom of the foldable mobile terminal. The antenna system 3 comprises a first radio frequency chip 31 and a plurality of radiators connected to the first radio frequency chip 31. Specifically, each radiator has a feeding point, and the feeding point of the radiator is connected to a first rf chip 31, where the first rf chip 31 is configured to feed the plurality of radiators respectively, so as to implement a communication function of the radiator. In the embodiment of the present application, the frequency range of the signals transmitted by the plurality of radiators is 1.7 ghz-5 ghz, and specifically, the antenna system 3 works in the middle-high frequency band when the antenna system 3 works. The plurality of radiators includes a first radiator 38, a second radiator 39, a third radiator 310, a fourth radiator 311, and a fifth radiator 312, wherein the first radiator 38 is located at the first side 111, the second radiator 39 and the third radiator 310 are located at the second side 112, the fourth radiator 311 is located at the third side 113, and the fifth radiator 312 is located at the fourth side 121.

In this embodiment, the antenna system 3 in the foldable mobile terminal includes at least five radiators, and the operation states of a plurality of radiators in the antenna system 3 can be selected according to the need. In one embodiment, four radiators of the plurality of radiators of the antenna system 3 operate at the same frequency, and at least one radiator of the four radiators operating at the same frequency is used for transmitting signals at the same time, and the four radiators are used for receiving signals at the same time. In the scheme, the radiating body working at the same frequency in the antenna system 3 realizes a 1T4R working mode, so that the communication efficiency of the antenna system 3 is improved, and the communication capacity of the foldable mobile terminal is improved.

According to the technical scheme, the foldable mobile terminal is in any pose, at least four radiators can work simultaneously through reasonable distribution, so that blind spots are not easy to occur in the directional diagram of the antenna system 3 in any pose, and the communication effect of the foldable mobile terminal is improved.

Fig. 31 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 31, in an embodiment, the antenna system 3 of the foldable mobile terminal may further include a tenth radiator 313, so that the antenna system 3 includes at least six radiators, and the tenth main radiator is located on the fifth side 122. Fig. 32 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 32, in an embodiment, the antenna system 3 of the foldable mobile terminal may further include a tenth radiator 313 and an eleventh radiator 314, so that the antenna system 3 includes at least seven radiators, and the tenth radiator 313 and the eleventh radiator 314 are located on the fifth side 122, respectively. Fig. 33 is a schematic structural diagram of a foldable mobile terminal according to an embodiment of the present application, as shown in fig. 33, in an embodiment, the antenna system 3 of the foldable mobile terminal may further include a tenth radiator 313, an eleventh radiator 314, and a twelfth radiator 315, so that the antenna system 3 includes at least eight radiators, the tenth radiator 313 and the eleventh radiator 314 are located on the fifth side 122 and the twelfth radiator 315 is located on the sixth side 123, respectively.

Fig. 34a to fig. 34e are schematic diagrams illustrating the operation of the antenna system of the foldable mobile terminal in different positions, and fig. 34a to fig. 34e illustrate the operation of the antenna system 3 in different positions by taking eight radiators as an example, where the radiator in the solid line frame is a radiator in an operating state, and the radiator in the dashed line frame is a radiator not in an operating state. As shown in fig. 34a to 34e, in the embodiment of the present application, the antenna system 3 of the foldable mobile terminal includes a plurality of radiators, and when the foldable mobile terminal is in any position, and a user holds the foldable mobile terminal in a common holding position, at least four radiators in the antenna system 3 are simultaneously in a working state, so as to improve the communication capability of the foldable mobile terminal.

In a specific embodiment, a plurality of radiators in the antenna system 3 are connected to the same first rf chip 31, so that the antenna system 3 is formed as a multiple-input multiple-output (MIMO) antenna system 3. The mimo antenna system 3 refers to a communication system that uses multiple antennas at both a transmitting end and a receiving end, and increases the capacity and spectrum utilization of the communication system by a multiple without increasing the bandwidth.

In a specific embodiment, the antenna system 3 further comprises a control switch, which is connected between the radiator of the antenna system 3 and the first rf chip 31. The control switch is used for communicating the plurality of radiators with the first radio frequency chip 31 according to the intensity of the signal transmitted by each radiator of the antenna system 3. In a specific implementation manner, the control switch may select, according to the intensity of the transmission signals of the respective radiators of the antenna system 3, a preset number of the radiators with the strongest intensity of the communication transmission signals and the first rf chip 31, so as to perform communication by using the preset number of the communicated radiators. Specifically, the preset number may include four or five, and so on. Or in a specific implementation manner, the control switch may select, according to the intensity of the signal transmitted by each radiator of the antenna system 3, the radiator with the intensity of the signal transmitted being greater than the preset value to be communicated with the first rf chip 31, so as to use the communicated preset number of radiators to perform communication.

In addition, the control switch can also connect the plurality of radiators and the first radio frequency chip 31 in combination with the pose of the foldable mobile terminal. And judging the pose of the foldable mobile terminal. Specifically, the control switch may further select the radiator and the first rf chip 31 to be connected according to signals of a hall sensor (hall), a gyroscope, or an electromagnetic wave energy absorption rate sensor (specific absorption rate, SAR sensor).

Similar to the foregoing embodiments, the first rf chip 31 may be disposed in a variety of ways, for example, in a specific embodiment, the foldable movement may include a first rf chip 31, where the first rf chip 31 is mounted on the first housing 11, the radiator located in the first housing 11 is directly connected to the first rf chip 31, and the radiator located in the second housing 12 is connected to the first rf chip 31 through a flexible electrical connector, for example, the flexible electrical connector may be an electrical connector such as a flexible circuit board, a strip line, or a jumper.

In order to enhance the signal transmission effect between the radiator located in the second housing 12 and the first rf chip 31, in one embodiment, a power amplifier 36 (PA) is connected between the first rf chip 31 and the radiator located in the second housing 12, and the power amplifier 36 is used for processing the signal emitted by the radiator. The power amplifier 36 can compensate for the problem of larger loss between the radiator of the second housing 12 and the first rf chip 31, and improve the working effect of the radiator located in the second housing 12. In a specific embodiment, a power amplifier 36 is connected to each of the radiators of the second housing 12 that radiate signals outwardly.

In one embodiment, a low noise amplifier 37 (low noise amplifier, LNA) is connected between the first rf chip 31 and the radiator located in the second housing 12, and the low noise amplifier 37 is used for processing signals received by the radiator, so as to improve the quality of the signals received by the radiator of the antenna system 3 located in the second housing 12, and improve the working effect of the antenna system 3.

In a specific embodiment, for the radiator for both transmitting and receiving signals, a power amplifier 36 and a low noise amplifier 37 are connected, and the power amplifier 36 and the low noise amplifier 37 are integrated into a front-end module (FEM).

In one embodiment, the antenna system 3 of the foldable mobile terminal includes two first rf chips 31, wherein one of the first rf chips 31 is mounted on the first housing 11, and the first rf chip 31 located on the first housing 11 is connected to a radiator located on the first housing 11. The other first rf chip 31 is mounted on the second housing 12, and the first rf chip 31 located in the second housing 12 is connected to the radiator located in the second housing 12. In a specific embodiment, the two first rf chips 31 of the antenna system 3 are respectively connected to the system-on-chip 4 to cooperatively work. In this embodiment, each radiator is connected to the first rf chip 31 that is closer to the radiator, so that the loss of the signal transmission path can be reduced, and the communication capability of the antenna system 3 can be improved.

Fig. 35 is a schematic structural view of a foldable mobile terminal according to an embodiment of the present application, and as shown in fig. 35, a first housing 11 of a foldable mobile terminal according to the present application further includes a first side 111, a second side 112, and a third side 113 sequentially connected, where the first side 111 and the third side 113 are perpendicular to an extending direction of a first rotating shaft 13, respectively, and the second housing 12 includes a fourth side 121, a fifth side 122, and a sixth side 123 sequentially connected, where the fourth side 121 and the sixth side 123 are perpendicular to an extending direction of the first rotating shaft 13, respectively, and the first side 111 and the fourth side 121 are located at a top of the foldable mobile terminal. The top is the top in which the application icon is in an upward state when the user uses the foldable mobile terminal in a normal state. In one embodiment, the top may refer to a direction in which an earpiece of the foldable mobile terminal is located, and the direction in which the microphone is located is a bottom of the foldable mobile terminal. The antenna system 3 comprises a first radio frequency chip 31 and a plurality of radiators connected to the first radio frequency chip 31, respectively. Specifically, each radiator has a feeding point, and the feeding point of the radiator is connected to a first rf chip 31, where the first rf chip 31 is configured to feed the plurality of radiators, so as to implement a communication function of the radiator. In the embodiment of the present application, the frequency range of the signals transmitted by the plurality of radiators is 600 mhz-960 mhz, and specifically, the antenna system 3 works in the low frequency band when the antenna system 3 works. The plurality of radiators includes a sixth radiator 316, a seventh radiator 317, an eighth radiator 318, and a ninth radiator 319, where the sixth radiator 316 is located on the second side 112, the seventh radiator 317 is located on the third side 113, the eighth radiator 318 is located on the fifth side 122, and the ninth radiator 319 is located on the sixth side 123.

In this embodiment, the antenna system 3 comprises at least four radiators. Two radiators of the plurality of radiators in the antenna system 3 work at the same frequency, at least one radiator of the two radiators is used for transmitting signals, and the two radiators are used for receiving signals at the same time. In the scheme, the radiating body working at the same frequency in the antenna system 3 realizes a 1T2R working mode, so that the communication efficiency of the antenna system 3 is improved, and the communication capacity of the foldable mobile terminal is improved.

In a specific embodiment, the foldable mobile terminal is in any pose, at least two radiators can work simultaneously through reasonable distribution, and the two radiators work cooperatively, so that blind spots are not easy to appear in the directional diagram of the antenna system 3 in any pose, and the communication effect of the foldable mobile terminal is improved.

In a specific embodiment, a distance L1 between the upper edge of the sixth radiator 316 and the first side 111 is smaller than a distance L2 between the upper edge of the sixth radiator 316 and the third side 113, and a distance L3 between the upper edge of the eighth radiator 318 and the fourth side 121 is smaller than a distance L4 between the upper edge of the eighth radiator 318 and the sixth side 123. Specifically, the upper edge of the sixth radiator 316 refers to the upper edge of the sixth radiator 316 facing the first side 111, and the upper edge of the eighth radiator 318 refers to the upper edge of the eighth radiator 318 facing the fourth side 121. In this embodiment, the first side 111 and the fourth side 121 are located at the top of the foldable mobile terminal, where the application icon is in an up state when the user uses the foldable mobile terminal in a normal state. In one embodiment, the top may refer to a direction in which an earpiece of the foldable mobile terminal is located, and the direction in which the microphone is located is a bottom of the foldable mobile terminal. The scheme is beneficial to users in the state of using the foldable mobile terminal conventionally (hands are held at one side of the bottom of the foldable mobile terminal), the hands are not easy to shade signals, and the foldable mobile terminal has good communication performance.

The foregoing is merely illustrative embodiments of the present application, but the scope of the present application 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 application, and the application should be covered. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A foldable mobile terminal comprising a first housing, a second housing, a first axis of rotation, and an antenna system, wherein:

The first housing and the second housing are foldable or unfoldable with respect to the first rotation axis;

The antenna system comprises a first radio frequency chip, a first main radiator and a second main radiator, wherein the first main radiator is positioned on one side of the first shell, and the second main radiator is positioned on one side of the second shell; in a folded state, the orthographic projection of the side edge of the first main radiator in the thickness direction of the foldable mobile terminal is overlapped with the orthographic projection of the side edge of the second main radiator in the thickness direction of the foldable mobile terminal;

The first main radiator is connected with a first phase shifter, the first phase shifter is connected between the first main radiator and the first radio frequency chip, the second main radiator is connected with a second phase shifter, and the second phase shifter is connected between the second main radiator and the first radio frequency chip.

2. The foldable mobile terminal of claim 1, wherein the current distribution on the first main radiator is co-directional with the current distribution on the second main radiator in the folded state of the first housing and the second housing.

3. The foldable mobile terminal of claim 2, wherein an orthographic projection of the first primary radiator in a thickness direction of the foldable mobile terminal at least partially coincides with an orthographic projection of the second primary radiator in the thickness direction of the foldable mobile terminal when the first housing and the second housing are in a folded state.

4. The foldable mobile terminal of any one of claims 1-3, wherein the first housing comprises a first side, a second side and a third side connected in sequence, the first side and the third side being perpendicular to the extending direction of the first rotating shaft, respectively, the second housing comprises a fourth side, a fifth side and a sixth side connected in sequence, the fourth side and the sixth side being perpendicular to the extending direction of the first rotating shaft, respectively, the first side and the fourth side at least partially overlap when the first housing and the second housing are in a folded state;

The first main radiator is at least partially located on the first side of the first housing and the second main radiator is at least partially located on the fourth side of the second housing.

5. The foldable mobile terminal of claim 4, wherein the first side and the fourth side are both located on top of the foldable mobile terminal.

6. The foldable mobile terminal of any of claims 1-5, wherein the antenna system is a satellite antenna system for communicating with a communication satellite.

7. The foldable mobile terminal of any one of claims 1-6, further comprising a second shaft and a third housing, wherein:

The first shell, the first rotating shaft, the third shell, the second rotating shaft and the second shell are sequentially connected.

8. A foldable mobile terminal comprising a first housing, a second housing, a first axis of rotation, and an antenna system, wherein:

The first shell comprises a first side edge, a second side edge and a third side edge which are sequentially connected, and the first side edge and the third side edge are respectively perpendicular to the extending direction of the first rotating shaft; the second shell comprises a fourth side, a fifth side and a sixth side which are sequentially connected, the fourth side and the sixth side are respectively perpendicular to the extending direction of the first rotating shaft, and the first side and the fourth side are positioned at the top of the foldable mobile terminal;

The antenna system comprises a first radio frequency chip and a plurality of radiators, wherein the plurality of radiators are respectively connected with the first radio frequency chip, the first radio frequency chip is used for feeding the plurality of radiators, the frequency range of signals transmitted by the plurality of radiators is within 1.7 GHz-5 GHz, the plurality of radiators comprise a first radiator, a second radiator, a third radiator, a fourth radiator and a fifth radiator, the first radiator is positioned on the first side, the second radiator and the third radiator are respectively positioned on the second side, the fourth radiator is positioned on the third side, and the fifth radiator is positioned on the fourth side;

Four of the plurality of radiators work at the same frequency, at least one of the four radiators is used for transmitting signals at the same time, and the four radiators are used for receiving signals at the same time.

9. The foldable mobile terminal of claim 8, wherein the plurality of radiators of the antenna system are connected to the antenna system of the same first radio frequency chip.

10. The foldable mobile terminal of claim 9, wherein the first radio frequency chip is mounted to the first housing, and the radiator in the antenna system located in the second housing is connected to the first radio frequency chip through a flexible electrical connection.

11. The foldable mobile terminal of claim 10, wherein a power amplifier PA is connected between the first radio frequency chip and a radiator located in the second housing.

12. The foldable mobile terminal according to claim 10 or 11, characterized in that a low noise amplifier LNA is also connected between the first radio frequency chip and a radiator located in the second housing.

13. The foldable mobile terminal of claim 8, wherein the antenna system comprises two first radio frequency chips, one of the first radio frequency chips being mounted to the first housing and connected to a radiator located in the first housing, and the other of the first radio frequency chips being mounted to the second housing and connected to a radiator located in the second housing.

14. The foldable mobile terminal of any of claims 8-13, wherein the antenna system further comprises a control switch, the control switch being connected between the radiator of the antenna system and the first radio frequency chip;

The control switch is used for communicating a plurality of radiators with the first radio frequency chip according to the intensity of signals transmitted by the radiators of the antenna system.

15. A foldable mobile terminal comprising a first housing, a second housing, a first axis of rotation, and an antenna system, wherein:

The antenna system comprises a first radio frequency chip and a plurality of radiators, wherein the radiators are respectively connected with the first radio frequency chip, the first radio frequency chip is used for feeding the radiators, the frequency range of signals transmitted by the radiators is 600 MHz-960 MHz, the radiators comprise a sixth radiator, a seventh radiator, an eighth radiator and a ninth radiator, the sixth radiator is positioned on the second side, the seventh radiator is positioned on the third side, the eighth radiator is positioned on the fifth side, and the ninth radiator is positioned on the sixth side;

two radiators of the plurality of radiators work at the same frequency, at least one radiator of the two radiators is used for transmitting signals, and the two radiators are simultaneously used for receiving signals.

16. The foldable mobile terminal of claim 15, wherein a plurality of the radiators of the antenna system are connected to the same first radio frequency chip.

17. The foldable mobile terminal of claim 15 or 16, wherein an upper edge of the sixth radiator toward the first side is less distant from the first side than from the third side, and wherein an upper edge of the eighth radiator toward the fourth side is less distant from the fourth side than from the sixth side.