CN119153928B

CN119153928B - Antenna devices and electronic equipment

Info

Publication number: CN119153928B
Application number: CN202310709788.2A
Authority: CN
Inventors: 任锐
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2025-12-05
Anticipated expiration: 2043-06-14
Also published as: CN119153928A

Abstract

This application discloses an antenna device and electronic device. The antenna device comprises a first radiator and a second radiator spaced apart. A second tuning module is electrically connected to the second radiator, and a first tuning module is electrically connected between a first feed and the first radiator. In a first state where the second tuning module is tuning and the first tuning module is in a first tuning mode, the first and second radiators support a first wireless signal, a first frequency band, and a second wireless signal in a second frequency band. In a second state where the second tuning module is tuning and the first tuning module is in a second tuning mode, the first and second radiators support the first wireless signal, the first frequency band, and a second wireless signal in a third frequency band. Based on this, the first wireless signal has relatively stable radiation performance, and the antenna device can be miniaturized.

Description

Antenna device and electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to an antenna apparatus and an electronic device.

Background

With the development of communication technology, electronic devices such as smart phones have more and more functions, communication modes of the electronic devices have more and more diversified, and antenna radiators arranged inside the electronic devices have more and more.

In the related art, antenna radiators supporting different wireless signals are often arranged separately, so that more antenna radiators are required to be arranged in the electronic equipment, the production cost of the electronic equipment is increased, and the miniaturization design of the electronic equipment is not facilitated.

Disclosure of Invention

The application provides an antenna device and an electronic device, which can realize miniaturization design.

In a first aspect, the present application provides an antenna device comprising:

A first radiator including a first end and a second end, a first feeding point disposed between the first end and the second end, the second end being grounded;

the first feed source is electrically connected with the first feed point;

The first tuning module is electrically connected between the first feed source and the first feed point;

a second radiator including a third end and a fourth end, and an electrical connection point between the third end and the fourth end, the third end being spaced from the first end, the fourth end extending away from the first radiator and being grounded, and

One end of the second tuning module is electrically connected with the electrical connection point, and the other end of the second tuning module is grounded, wherein,

In a first state that the second tuning module performs tuning and the first tuning module is in a first tuning mode, the first feed source is used for exciting at least one of a first wireless signal, a second wireless signal of a first frequency band and a second wireless signal of a second frequency band supported by the first radiator and the second radiator;

and in a second state that the second tuning module is tuned and the first tuning module is in a second tuning mode, the first feed source is used for exciting the first radiator and the second radiator to support at least one of the first wireless signal, a second wireless signal of the first frequency band and a second wireless signal of a third frequency band, and the third frequency band is different from the frequencies of the first frequency band, the second frequency band and the first wireless signal.

In a second aspect, the present application also provides an antenna device, including:

the first feed source is electrically connected with the first feed point;

The second radiator comprises a third end, a fourth end, an electric connection point and a second feed point, wherein the electric connection point and the second feed point are arranged between the third end and the fourth end;

A second feed source electrically connected to the second feed point, and

The band-stop circuit is connected in series between the second feed source and the second feed point,

The first feed source is used for exciting the first radiator and the second radiator to support first wireless signals, the second feed source is used for exciting the second radiator to generate a resonant mode and support second wireless signals of a fourth frequency band, the band elimination circuit is used for stopping a frequency multiplication signal corresponding to a frequency multiplication resonant mode of the resonant mode, and the frequency band range of the frequency multiplication signal is at least partially overlapped with the frequency band range of the first wireless signals.

In a third aspect, the application also provides an electronic device comprising an antenna arrangement as described above.

According to the antenna device and the electronic equipment, whether the first tuning module is in the first tuning mode so that the first tuning module and the second tuning module are in the first state or in the second tuning mode so that the first tuning module and the second tuning module are in the second state, the first feed source can excite the first radiator and the second radiator to support the first wireless signal and the second wireless signal of the first frequency band, and the first wireless signal and the second wireless signal of the first frequency band can be in a constant state and are basically not influenced by the tuning mode of the first tuning module, so that the first wireless signal and the second wireless signal of the first frequency band have stable radiation performance. Meanwhile, when the first tuning module is in a first tuning mode, the first feed source can also excite the first radiator and the second radiator to support a second wireless signal of a second frequency band; when the first tuning module is in a second tuning mode, the first feed source can excite the first radiator and the second radiator to support a second wireless signal of a third frequency band; the antenna device can cover at least three frequency bands of the second wireless signal, can support multiple wireless signals through the two radiators, achieves multiplexing of the radiators, can achieve miniaturization design of the antenna device, and meanwhile can enable the first wireless signal and the second wireless signal of the first frequency band to always keep stable radiation performance when the second wireless signal is switched between different frequency bands, and improves communication quality when the first wireless signal and the second wireless signal coexist.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the application and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a first structure of an antenna device according to an embodiment of the present application.

Fig. 2 is a schematic diagram of an electrical connection of the antenna device shown in fig. 1.

Fig. 3 is a schematic diagram of a first current distribution of the antenna device shown in fig. 1.

Fig. 4 is a schematic diagram of a second current distribution of the antenna device shown in fig. 1.

Fig. 5 is a schematic diagram of a third current distribution of the antenna device shown in fig. 1.

Fig. 6 is a schematic diagram of a second structure of an antenna device according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a current distribution of the antenna device shown in fig. 6.

Fig. 8 is a schematic diagram of an electrical connection of the antenna device shown in fig. 6.

Fig. 9 is a schematic diagram of a third structure of an antenna device according to an embodiment of the present application.

Fig. 10 is a schematic diagram of a fourth structure of an antenna device according to an embodiment of the present application.

Fig. 11 is a schematic diagram of a first antenna parameter of the antenna device shown in fig. 10.

Fig. 12 is a schematic diagram of a second antenna parameter curve of the antenna device shown in fig. 10.

Fig. 13 is a schematic diagram of a third antenna parameter curve of the antenna device shown in fig. 10.

Fig. 14 is a schematic diagram of a fourth antenna parameter of the antenna device shown in fig. 10.

Fig. 15 is a schematic diagram of a fifth antenna parameter curve of the antenna device shown in fig. 10.

Fig. 16 is a schematic diagram of a sixth antenna parameter of the antenna device shown in fig. 10.

Fig. 17 is a schematic diagram of a first structure of an electronic device according to an embodiment of the present application.

Fig. 18 is a schematic diagram of a second structure of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to fig. 1 to 18 in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

The embodiment of the application provides an antenna device and electronic equipment, wherein the antenna device can realize a wireless communication function, for example, the antenna device can support transmission of wireless fidelity (WIRELESS FIDELITY, wi-Fi) signals, global positioning system (Global Positioning System, GPS) signals, third Generation mobile communication technology (3 rd-Generation, 3G, 4th-Generation, 4G, fifth Generation mobile communication technology (5 th-Generation, 5G), near field communication (NEAR FIELD communication, NFC) signals, bluetooth (BT) signals, ultra Wide Band communication (UWB) signals and the like.

Referring to fig. 1, fig. 1 is a schematic diagram of a first structure of an antenna device 100 according to an embodiment of the application. The antenna device 100 includes a first radiator 110, a second radiator 120, a first feed 130, a first tuning module 140, and a second tuning module 150.

The first radiator 110 includes a first end 111 and a second end 112, and the second end 112 may be electrically connected to the ground system 160 to implement grounding, so that the second end 112 may be a ground end of the first radiator 110, and the first end 111 may be a free end/open end of the first radiator 110. The first radiator 110 further includes a first feeding point 113, the first feeding point 113 may be disposed between the first end 111 and the second end 112, the first feed 130 may be directly or indirectly electrically connected to the first feeding point 113, and the first feed 130 may provide an excitation signal to the first radiator 110 to excite at least one of the first radiator 110 and the second radiator 120 to support a wireless signal. The second radiator 120 may be disposed on a side of the first end 111 of the first radiator 110 facing away from the second end 112, the second radiator 120 includes a third end 121 and a fourth end 122, the third end 121 may be disposed at a distance from the first end 111 and form a coupling gap, the fourth end 122 may extend toward a direction away from the first radiator 110, and the fourth end 122 may be electrically connected to the ground system 160 to achieve grounding, such that the fourth end 122 is a grounding end of the second radiator 120, and the third end 121 is a free end/open end of the second radiator 120. The second radiator 120 and the first radiator 110 may form a common aperture antenna.

It is understood that the ground system 160 may form a common ground for the antenna arrangement 100 or the electronic device. Ground system 160 may be a plane or structure with zero potential. The ground system 160 may be formed by a conductor, a printed wiring, a metal printed layer, or the like in the antenna device 100 or the electronic apparatus, the ground system 160 may be formed on a circuit board, a board, or other carrier board of the antenna device 100 or the electronic apparatus, or the ground system 160 may be formed on a housing of the antenna device 100 or the electronic apparatus. The specific location of the ground system 160 is not limited in this embodiment of the present application.

Wherein the first tuning module 140 may be electrically connected between the first feed 130 and the first feed point 113, the first tuning module 140 may change the electrical length of the first radiator 110. The second tuning module 150 may be electrically connected to the second radiator 120, for example, an electrical connection point 123 is further disposed on the second radiator 120, the electrical connection point 123 may be disposed between the third end 121 and the fourth end 122, one end of the second tuning module 150 may be directly or indirectly electrically connected to the electrical connection point 123, and the other end of the second tuning module 150 may be electrically connected to the ground system 160 to implement grounding. The second tuning module 150 may change the electrical length of the second radiator 120.

It is understood that the electrical length refers to the length of the radiator when it radiates a signal, and the electrical length of the radiator may be greater than, less than, or equal to its stub length. The electrical length of the radiator may be associated with the frequency supported by the radiator, and the radiator may support a lower frequency wireless signal when the electrical length of the radiator is longer, and may support a higher frequency wireless signal when the electrical length of the radiator is shorter. The radiator may adjust the frequency of the supported wireless signal by electrically connecting circuits of different impedances to change its electrical length.

It is understood that the first tuning module 140 and the second tuning module 150 may include a plurality of tuning branches, and when the first tuning module 140 and the second tuning module 150 select different tuning branches so that the first tuning module 140 and the second tuning module 150 are in different tuning modes, the first tuning module 140 and the second tuning module 150 may change a resonance mode of at least one of the first radiator 110 and the second radiator 120, so as to tune a frequency of a wireless signal supported by the first radiator 110 and the second radiator 120.

For example, when the second tuning module 150 is tuned and the first tuning module 140 is in the first state of the first tuning mode, the first feed 130 may excite the first radiator 110 and the second radiator 120 to support at least one of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the second frequency band.

As another example, when the second tuning module 150 is tuned and the first tuning module 140 is in the second state of the second tuning mode, the first feed 130 may excite the first radiator 110 and the second radiator 120 to support at least one of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the third frequency band. The third frequency band is different from the frequency of the first frequency band, also different from the frequency of the second frequency band, and also different from the frequency of the first wireless signal.

It will be appreciated that the first tuning module 140 may be placed in either the first tuning mode or the second tuning mode by selecting a different tuning leg to electrically connect between the first feed 130 and the first feed point 113. Of course, the first tuning module 140 may also control a tuning branch to switch between different states, so that the first tuning module 140 is in the first tuning mode or in the second tuning mode. The embodiment of the present application is not limited to a specific manner in which the first tuning module 140 is in different tuning modes.

In the antenna device 100 according to the embodiment of the present application, whether the first tuning module 140 is in the first tuning mode and the first tuning module 140 and the second tuning module 150 are in the first state, or the first tuning module 140 is in the second tuning mode and the first tuning module 140 and the second tuning module 150 are in the second state, the first feed source 130 can excite the first radiator 110 and the second radiator 120 to support the first wireless signal and the second wireless signal of the first frequency band, and the first wireless signal can be in the constant state and is not substantially affected by the tuning mode of the first tuning module 140, and the first wireless signal and the second wireless signal of the first frequency band have a relatively stable radiation performance. Meanwhile, when the first tuning module 140 is in the first tuning mode, the first feed source 130 can also excite the first radiator 110 and the second radiator 120 to support the second wireless signal of the second frequency band, and when the first tuning module 140 is in the second tuning mode, the first feed source 130 can excite the first radiator 110 and the second radiator 120 to support the second wireless signal of the third frequency band, so that the antenna device 100 of the embodiment of the application can at least cover three frequency bands of the second wireless signal and basically cover the full frequency band of the second wireless signal. The antenna device 100 of the embodiment of the application can support various wireless signals through two radiators, the radiators can realize multiplexing, and the miniaturization design of the antenna device 100 can be realized, meanwhile, the antenna device 100 can realize that the first wireless signal and the second wireless signal of the first frequency range always keep stable radiation performance when the second wireless signal is switched between different frequency ranges, and the communication quality when the first wireless signal and the second wireless signal coexist is improved.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating an electrical connection of the antenna device 100 shown in fig. 1. The first tuning module 140 may include a first switching circuit 141, a first frequency selection circuit 1421, and a second frequency selection circuit 1422.

The first frequency selective circuit 1421 and the second frequency selective circuit 1422 may be sequentially connected in series between the first feed 130 and the first feed point 113. The first switching circuit 141 includes at least a first inductive load branch 1411 with zero ohms, one end of the first inductive load branch 1411 may be electrically connected between the first frequency selective circuit 1421 and the second frequency selective circuit 1422, and the other end of the first inductive load branch 1411 may be switchably connected to or disconnected from the electrical connection between the second frequency selective circuit 1422 and the first feeding point 113, such that the first inductive load branch 1411 may be electrically connected to both ends of the second frequency selective circuit 1422, or the first inductive load branch 1411 may be disconnected from the electrical connection to both ends of the second frequency selective circuit 1422.

It is appreciated that the first switching circuit 141 may turn on the other end of the first inductive load branch 1411 to be electrically connected between the second frequency selective circuit 1422 and the first feeding point 113, so as to place the first tuning module 140 in the first tuning mode. The first switching circuit 141 may also disconnect the electrical connection between the other end of the first inductive load branch 1411 and the second frequency selective circuit 1422 and the first feed point 113 to place the first tuning module 140 in the second tuning mode.

The first feed 130 may excite the first radiator 110 and the second radiator 120 to support at least one wireless signal of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the second frequency band when the first switching circuit 141 turns on the other end of the first inductive load branch 1411 and is electrically connected between the second frequency selecting circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 is in a first tuning mode electrically connected to the two ends of the second frequency selecting circuit 1422 and in a first state where the second tuning module 150 performs tuning.

The first feed 130 may excite the first radiator 110 and the second radiator 120 to support at least one wireless signal of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the third frequency band when the first switching circuit 141 breaks the electrical connection between the other end of the first inductive load branch 1411 and the second frequency selecting circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 is in a second tuning mode in which the second switching circuit is electrically disconnected from the two ends of the second frequency selecting circuit 1422 and the second tuning module 150 performs tuning.

It is appreciated that the first frequency selective circuit 1421 and the second frequency selective circuit 1422 may be bandpass circuits compared to signals in certain frequency bands. When the first inductive load branch 1411 is electrically connected to two ends of the second frequency selective circuit 1422, the second frequency selective circuit 1422 may be shorted, the electrical length of the first radiator 110 may be shortened, and the first radiator 110 may support a radio signal with a higher frequency. When the first inductive load branch 1411 is disconnected from the two ends of the second frequency selective circuit 1422, the second frequency selective circuit 1422 is not shorted, and compared with the shorted state of the second frequency selective circuit 1422, the electrical length of the first radiator 110 is longer, and the first radiator 110 can support a wireless signal with a lower frequency.

It is understood that the first wireless signal may be different from the second wireless signal. For example, the first wireless signal and the second wireless signal may be different types of wireless signals. By way of example, the first wireless signal may be, but is not limited to being, a 2.4G Wi-Fi signal, a 5G Wi-Fi signal, a BT signal, a GPS-L1 band signal, a GPS-L5 band signal, and the like. The second wireless signal may be, but is not limited to, a cellular signal such as a full band signal of 5G or a full band signal of 4G. Illustratively, the first frequency band may be, but is not limited to, an N40 frequency band, an N41 frequency band, a B40 frequency band, or a B41 frequency band, the second frequency band may be, but is not limited to, an N78 frequency band, an N79 frequency band, and the third frequency band may be, but is not limited to, a B1 frequency band, a B3 frequency band, an N1 frequency band, or an N3 frequency band. Of course, the first wireless signal and the second wireless signal may be other signals, which is not limited in the embodiment of the present application.

It is understood that a frequency selective circuit refers to a circuit structure that works by utilizing the principle of the phase frequency characteristic and the amplitude characteristic of the circuit so that an input signal in a certain frequency range is output. The frequency selective circuit is also called a filter, and the frequency selective circuit can filter out certain frequency components in the excitation signal or amplify certain frequency components. A common frequency selective circuit may include a capacitive element and an inductive element in series. The embodiment of the application does not limit the specific structure of the frequency selection circuit.

It is understood that an inductive load branch refers to a circuit or structure that allows current to flow but lags the voltage, and that the inductive load branch primarily loads an inductive reactance element (e.g., inductance). In an ac circuit, when a current passes through an inductance, an induced electromotive force is generated in the inductance, resulting in the storage and release of energy in the circuit, and thus is called an inductive load. Typical inductive loads include transformers, inductors, and the like. When the inductance value of the inductance element is zero, the inductance element with zero inductance value may be the first inductive load branch 1411 with zero ohms according to the embodiment of the present application.

When the first switching circuit 141 is turned on and the other end of the first inductive load branch 1411 is electrically connected between the second frequency selecting circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 is in a first tuning mode electrically connected to two ends of the second frequency selecting circuit 1422, the first inductive load branch 1411 of the first switching circuit 141 is constantly equivalent to a series inductive load for the first frequency band, the second frequency band and the first wireless signal with higher frequency, and the second frequency selecting circuit 1422 can be shorted because the first inductive load branch 1411 is zero ohm, and the first feed 130 is equivalent to directly feeding the first radiator 110. Under the combined action of the second tuning module 150, the second radiator 120 may act as a parasitic branch of the first radiator 110, and the two may jointly excite to generate a resonant mode and support at least one of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the second frequency band.

For example, referring to fig. 3, fig. 3 is a schematic diagram of a first current distribution of the antenna device 100 shown in fig. 1. In a first state in which the first switching circuit 141 conducts an electrical connection between the other end of the first inductive load branch 1411 and the second frequency selective circuit 1422 and the first feeding point 113, such that the first inductive load branch 1411 is in a first tuning mode in which it is electrically connected to both ends of the second frequency selective circuit 1422, and the second tuning module 150 performs tuning, the first inductive load branch 1411 may be electrically connected to both ends of the second frequency selective circuit 1422, and the first feed 130 may excite the first radiator 110 and the second radiator 120 to jointly generate a first resonance mode, which may form a first resonance current I1 flowing in a direction from the first feeding point 113 to the electrical connection point 123 on the first radiator 110 and the second radiator 120, so that the first resonance mode may support at least one of the first wireless signal, the second wireless signal of the first frequency band.

It may be appreciated that the first feed 130 may excite a radiation segment between the first feeding point 113 and the first end 111 of the first radiator 110 as a main radiation segment, and a radiation segment between the third end 121 and the electrical connection point 123 of the second radiator 120 as an auxiliary radiation segment together support the first wireless signal in a first resonant mode, where a first resonant current I1 generated by excitation in the first resonant mode may flow in a direction from the first feeding point 113 to the first end 111, and be electromagnetically coupled to the second radiator 120, and may return from the second tuning module 150 electrically connected to the electrical connection point 123, where a current distribution density of the first resonant current I1 on the first radiator 110 may be greater than a current distribution density on the second radiator 120, so that the radiation segment between the first feeding point 113 and the first end 111 serves as the main radiation segment.

It can be understood that the first inductive load branch 1411 of the first switching circuit 141 is constantly equivalent to a series inductive load for the first wireless signal with higher frequency and the second wireless signal with the first frequency band, the second frequency selecting circuit 1422 can be shorted, the first feed source 130 is equivalent to directly feeding the first radiator 110, at this time, the second radiator 120 can form a parasitic mode with a quarter wavelength mode under the cooperation of the second tuning module 150, and the parasitic mode can enhance the radiation efficiency of the first radiator 110 supporting the first wireless signal and the second wireless signal, thereby improving the radiation efficiency of the antenna device 100.

When the first frequency band of the second wireless signal is similar to the frequency range of the first wireless signal (the frequency ranges of the first frequency band and the first frequency band at least partially overlap in the frequency spectrum), in the first state, the first feed 130 may also excite the radiation segment between the first feeding point 113 and the first end 111 to serve as a main radiation segment, and the radiation segment between the third end 121 and the electrical connection point 123 to serve as an auxiliary radiation segment to jointly support the second wireless signal of the first frequency band.

It will be appreciated that the first frequency band may also be different from the frequency of the first wireless signal, for example, the first frequency band may be completely spaced apart, or the center frequencies of the first frequency band and the second frequency band may be different in frequency spectrum, and that the first feed 130 may excite the second wireless signal supporting the first frequency band in other resonant modes. The embodiment of the present application is not limited thereto.

It can be appreciated that the first feed 130 may also excite the first radiator 110 and the second radiator 120 to support the first wireless signal in other resonant modes, for example, but not limited to, the entire second radiator 120 may be used as an auxiliary radiating section and support the first wireless signal together with the first radiator 110, and the specific resonant modes of the first wireless signal and the second wireless signal in the first frequency band are not limited in the embodiments of the present application.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating a second current distribution of the antenna device 100 shown in fig. 1. In a first state in which the first switching circuit 141 conducts an electrical connection between the other end of the first inductive load branch 1411 and the second frequency selective circuit 1422 and the first feed point 113, such that the first inductive load branch 1411 is in a first tuning mode electrically connected to both ends of the second frequency selective circuit 1422 and the second tuning module 150 is tuned, the first feed 130 may excite the first radiator 110 and the second radiator 120 to jointly generate a second resonance mode, the second resonance mode forms a current zero point a between the electrical connection point 123 and the fourth terminal 122, and the second resonance mode may form a second resonance current I2 flowing in a direction from the first feed point 113 to the current zero point a and flowing in a direction from the fourth terminal 122 to the current zero point a, so that the second resonance mode may support a second wireless signal of the second frequency band.

It will be appreciated that the first feed 130 may excite a radiating segment between the first feed point 113 and the first end 111 as a primary radiating segment, and a radiating segment between the fourth end 122 of the third end 121 (i.e., the entire second radiator 120) to support the second wireless signal of the second frequency band in the second resonant mode together with the three-quarter wavelength mode as a secondary radiating segment. The second resonant current I2 generated by the second resonant mode excitation may flow in a direction from the first feeding point 113 to the first end 111, be electromagnetically coupled to the second radiator 120, and flow on the second radiator 120, and a current distribution density of the second resonant current I2 on the first radiator 110 may be greater than a current distribution density thereof on the second radiator 120.

It is understood that the second frequency band may be different from the first frequency band. For example, the second frequency band may be higher than the first frequency band. The first inductive load branch 1411 of the first switching circuit 141 is constantly equivalent to a series inductive load for the second frequency band with higher frequency, the second frequency selecting circuit 1422 can be shorted, the first feed source 130 is equivalent to directly feeding the first radiator 110, at this time, the second radiator 120 can form a parasitic mode with a three-quarter wavelength mode under the cooperation of the second tuning module 150, and the parasitic mode can enhance the radiation efficiency of the second wireless signal supported by the first radiator 110 in the second frequency band.

It may be understood that the first feed source 130 may separately excite the first radiator 110 and the second radiator 120 to support the first wireless signal, the second wireless signal in the first frequency band, or the second wireless signal in the second frequency band, and the first feed source 130 may also simultaneously excite the first radiator 110 and the second radiator 120 to support any two or three signals of the first wireless signal, the second wireless signal in the first frequency band, and the second wireless signal in the second frequency band under the action of a combiner, a power divider, and other devices.

It should be noted that, the first feed source 130 may also excite the first radiator 110 and the second radiator 120 to support the second wireless signal in the second frequency band in other resonant modes, and the specific resonant mode of the second wireless signal in the second frequency band is not limited in the embodiment of the present application.

Wherein, when the first switching circuit 141 breaks the electrical connection between the other end of the first inductive load branch 1411 and the second frequency-selecting circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 is in a second tuning mode of breaking the electrical connection with the two ends of the second frequency-selecting circuit 1422 and tuning the second tuning module 150, the first inductive load branch 1411 breaks the electrical connection with the two ends of the second frequency-selecting circuit 1422, the first inductive load branch 1411 of the first switching circuit 141 is equivalent to a series capacitance load for a third frequency band with low frequency, the second frequency-selecting circuit 1422 is not shorted, and the first feed 130 is equivalent to coupling feeding the first radiator 110. Under the combined action of the second tuning module 150, the second radiator 120 may act as a parasitic branch of the first radiator 110, and the two may jointly excite to generate a second wireless signal in a resonant mode and support a third frequency band.

For example, please refer to fig. 5, fig. 5 is a third current distribution diagram of the antenna device 100 shown in fig. 1. The first switching circuit 141 breaks the electrical connection between the other end of the first inductive load branch 1411 and the second frequency selective circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 is in a second state of breaking the second tuning mode electrically connected to the two ends of the second frequency selective circuit 1422 and tuning by the second tuning module 150, the first feed 130 may excite the first radiator 110 and the second radiator 120 to generate a third resonance mode, and the third resonance mode may form a third resonance current I3 flowing in a direction from the second end 112 to the electrical connection point 123 on the first radiator 110 and the second radiator 120, so that the third resonance mode may support the second wireless signal of the third frequency band.

It is understood that the first feed 130 may excite a radiation segment between the second end 112 and the first end 111 of the first radiator 110 (i.e. the entire first radiator 110) as a main radiation segment, and a radiation segment between the third end 121 and the electrical connection point 123 of the second radiator 120 as an auxiliary radiation segment together support the second wireless signal of the third frequency band in the third resonance mode. The third resonant current I3 generated by the third resonant mode excitation may flow in a direction from the second end 112 to the first end 111, and be electromagnetically coupled to the second radiator 120 and grounded from the second tuning module 150, and a current distribution density of the third resonant current I3 on the first radiator 110 may be greater than a current distribution density thereof on the second radiator 120.

It is understood that the third frequency band may be different from the first frequency band and also different from the second frequency band, e.g., the third frequency band may be lower than the first frequency band and the second frequency band. The first inductive load branch 1411 of the first switching circuit 141 is equivalent to a serial capacitive load for the third frequency band with lower frequency, the first switching circuit 141 can be equivalently opened, the first feed source 130 is equivalent to coupling feeding the first radiator 110, at this time, the second radiator 120 can form a parasitic mode in a quarter wavelength mode under the cooperation of the second tuning module 150, and the parasitic mode can enhance the radiation efficiency of the second wireless signal supported by the first radiator 110 in the third frequency band.

It should be noted that, the first feed source 130 may also excite the first radiator 110 and the second radiator 120 to support the second wireless signal in the third frequency band in other resonant modes, which is not limited in the embodiment of the present application.

It should be noted that, since the first inductive load branch 1411 of the first switching circuit 141 is constantly equivalent to a series inductive load for both the first wireless signal with a higher frequency and the second wireless signal with the first frequency band, the first switching circuit 141 breaks the electrical connection between the other end of the first inductive load branch 1411 and the second frequency selective circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 is in the second state of breaking the second tuning mode electrically connected to the two ends of the second frequency selective circuit 1422 and the second tuning module 150 performs tuning, the first feed 130 may also excite the first radiator 110 and the second radiator 120 to jointly generate the first resonant mode, and the first resonant mode may form a first resonant current I1 flowing in a direction from the first feeding point 113 to the electrical connection point 123 on the first radiator 110 and the second radiator 120, so that the first resonant mode may support at least one of the first wireless signal and the second wireless signal with the first frequency band.

In the antenna device 100 of the embodiment of the present application, whether the first inductive load branch 1411 is electrically connected to two ends of the second frequency selective circuit 1422 and is in the first tuning mode, or the first inductive load branch 1411 is disconnected from the two ends of the second frequency selective circuit 1422 and the first tuning mode 140 is in the second tuning mode, the first feed source 130 can excite the first radiator 110 and the second radiator 120 to support the first wireless signal and the second wireless signal of the first frequency band, and the first wireless signal and the second wireless signal of the first frequency band can be in a constant state and are not substantially affected by the state of the first inductive load branch 1411, and the first wireless signal and the second wireless signal of the first frequency band have more stable radiation performance. Meanwhile, when the first inductive load branch 1411 is electrically connected to two ends of the second frequency selective circuit 1422, the first feed 130 can also excite the first radiator 110 and the second radiator 120 to support the second wireless signals of the first frequency band and the second frequency band, and when the first inductive load branch 1411 is disconnected from the two ends of the second frequency selective circuit 1422, the first feed 130 can excite the first radiator 110 and the second radiator 120 to support the second wireless signals of the third frequency band, so that the antenna device 100 of the embodiment of the application can cover at least three frequency bands of the second wireless signals and basically cover the full frequency band of the second wireless signals. The antenna device 100 of the embodiment of the application can support various wireless signals through two radiators, the radiators can realize multiplexing, and the miniaturization design of the antenna device 100 can be realized, meanwhile, the antenna device 100 can realize that the first wireless signal and the second wireless signal of the first frequency range always keep stable radiation performance when the second wireless signal is switched between different frequency ranges, and the communication quality when the first wireless signal and the second wireless signal coexist is improved.

Referring to fig. 2 again, the first switching circuit 141 may further include a plurality of (two or more) load branches, for example, a plurality of first load branches 1412.

One end of each first load branch 1412 is switchably connected to or disconnected from electrical connection with the second frequency selective circuit 1422 and the first feed point 113, and the other end of each first load branch 1412 is grounded. The first switching circuit 141 switches among the plurality of first load branches 1412, and may adjust the frequency range of the third frequency band.

It is understood that each first load branch 1412 may be an inductive load branch or a capacitive load branch, and the first switching circuit 141 may include at least one of an inductive load branch and a capacitive load branch. By capacitive load branch is meant a circuit or structure that prevents current from flowing through, but current leads voltage. A circuit mainly using a capacitive element as a main load in a capacitive load branch circuit. In an ac circuit, when a voltage is applied to a capacitor, the capacitor accumulates charge, forms an electric field, and discharges charge when the voltage is changed, and is therefore called a capacitive load. Typical capacitive loads include capacitive elements. Considering that the frequency range of the third frequency band is low, the plurality of first load branches 1412 of the first switching circuit 141 in the embodiment of the present application may be inductive load branches, so as to increase the electrical length of the second radiator 120.

It will be appreciated that the first switching circuit 141 may further comprise a switch, an input end of which may be electrically connected between the second frequency selective circuit 1422 and the first radiator 110, and another end of which may be electrically connected to the first inductive load branch 1411 and each first load branch 1412, respectively, so as to select at least one load branch to operate between the plurality of first load branches 1412 and the first inductive load branch 1411. Of course, the first switching circuit 141 may not include a switch, and the first inductive load branch 1411 and the plurality of first load branches 1412 of the first switching circuit 141 may be parameter-adjustable branches, and may be turned on or off by changing parameters thereof. The embodiment of the present application is not limited to the specific structure of the first switching circuit 141.

It is understood that the switch, the plurality of first load branches 1412 and the first inductive load branch 1411 may be integrated in the same module such that the first switch circuit 141 may be an integrated circuit. Of course, the switch, the plurality of first load branches 1412, and the first inductive load branch 1411 may also be, but are not limited to, disposed on the carrier plate relatively independently. The embodiment of the present application is not limited to the specific structure of the first switching circuit 141.

The first switching circuit 141 in the embodiment of the present application includes a first inductive load branch 1411 and a plurality of first load branches 1412, where the first switching circuit 141 can not only switch the wireless signals supported by the antenna device 100 among the first frequency band, the second frequency band and the third frequency band of the second wireless signals, but also control the antenna device 100 to support the second wireless signals of the first frequency band of different sub-frequency bands, the second wireless signals of the second frequency band of different sub-frequency bands or the second wireless signals of the third frequency band of different sub-frequency bands, so that the antenna device 100 can cover more wireless signals.

Referring to fig. 6, fig. 6 is a schematic diagram of a second structure of an antenna device 100 according to an embodiment of the application. The antenna apparatus 100 may also include a second feed 170 and a third tuning module 180.

The second feed 170 may be electrically connected to the second radiator 120, for example, the second radiator 120 may further include a second feeding point 124, the second feeding point 124 being located between the electrical connection point 123 and the fourth end 122, and the second feed 170 may be directly or indirectly electrically connected to the second feeding point 124. The third tuning module 180 may be electrically connected between the second feed 170 and the second feed point 124, and the third tuning module 180 may change the electrical length of the second radiator 120 to adjust the resonant mode of the second radiator 120. The second feed source 170 may excite the second radiator 120 to generate a fourth resonant mode and support a second wireless signal of a fourth frequency band under the action of the third tuning module 180.

It is understood that the fourth frequency band may be different from the first, second, and third frequency bands, e.g., the fourth frequency band may be spectrally lower than the first, second, and third frequency bands.

As shown in fig. 7, fig. 7 is a schematic diagram of a current distribution of the antenna device 100 shown in fig. 6. The fourth resonance mode may form a fourth resonance current I4 flowing in a direction from the second feeding point 124 to the fourth end 122 of the second radiator 120 on the second radiator 170 such that the fourth resonance mode supports the second wireless signal of the fourth frequency band.

It is understood that the second feed 170 may excite a radiation segment between the second feeding point 124 to the fourth end 122 of the second radiator 120 to support the second wireless signal of the fourth frequency band in a fourth resonance mode of the eighth wavelength mode, and a fourth resonance current I4 generated by the fourth resonance mode excitation may flow along the second feeding point 124 to the fourth end 122 and return to the ground from the fourth end 122.

It is understood that, when the fourth frequency band is a frequency band with a lower frequency, the eighth wavelength mode may make the radiation branch of the second radiator 120 supporting the fourth frequency band shorter, so as to further implement the miniaturized design of the antenna apparatus 100. It should be noted that, the second feed source 170 may also excite the second radiator 120 to support the second wireless signal in the fourth frequency band in other radiation modes, which is not limited in the embodiment of the present application.

Referring to fig. 8, fig. 8 is a schematic diagram illustrating an electrical connection of the antenna device 100 shown in fig. 6. The third tuning module 180 includes a band reject circuit 1821.

The band-stop circuit 1821 is connected in series between the second feed source 170 and the second feed point 124, the band-stop circuit 1821 can cut off the multiple frequency signal corresponding to the multiple frequency resonance mode of the fourth resonance mode when the second radiator 120 supports the fourth frequency band, the frequency band range of the multiple frequency signal at least partially overlaps with the frequency band range of the first wireless signal, and the band-stop circuit 1821 can cut off the multiple frequency signal to avoid the interference of the multiple frequency signal on the first wireless signal.

It will be appreciated that the band reject circuit 1821 is a circuit structure that is capable of passing most of the frequency components, but attenuating some range of frequency components to very low levels. For example, but not limited to, the band reject circuit 1821 may include an inductive load element and a capacitive load element in parallel with each other, or the resistive circuit may include a series-parallel circuit formed by an integral body of an inductive load element and a capacitive load element in parallel with each other and in series with a capacitive element. The specific structure of the band stop circuit 1821 is not limited in the embodiment of the present application.

In the antenna device 100 of the embodiment of the application, when the radiation section between the second feeding point 124 and the fourth end 122 of the second radiator 120 supports the second wireless signal in the fourth frequency band in the eighth wavelength mode, the resonance mode is the fundamental mode, the resonance mode may also generate a multiple frequency resonance mode, and if the multiple frequency signal corresponding to the multiple frequency resonance mode at least partially overlaps the first wireless signal, the multiple frequency signal may interfere with the first wireless signal. The band reject circuit 1821 of the present embodiment may cut off the multiple frequency signal, when the second radiator 120 supports the second wireless signal of the fourth frequency band, the higher order mode generated by the resonance mode of the fourth frequency band may not fall within the band of the first wireless signal, so as to avoid generating an efficiency pit for the first wireless signal, thereby, when the second radiator 120 supports the fourth frequency band, the first wireless signal may also have relatively stable radiation performance, and no obvious efficiency pit may be generated.

Referring to fig. 8 again, the third tuning module 180 may further include a second switching circuit 181.

One end of the second switching circuit 181 is directly or indirectly electrically connected between the band-stop circuit 1821 and the second feeding point 124, and the other end of the second switching circuit 181 is electrically connected to the ground system 160 to realize grounding. The second switching circuit 181 may adjust the frequency range of the fourth frequency band.

It will be appreciated that the second switching circuit 181 may include, but is not limited to, a plurality (two or more) of load branches, for example, the second switching circuit 181 may include a plurality of second load branches 1811, one end of each second load branch 1811 may switchably connect or disconnect an electrical connection to a region between the band stop circuit 1821 and the second feeding point 124, and one end of each second load branch 1811 may be grounded. The second switching circuit 181 may switch between the plurality of second load branches 1811, so that under the switching action of the second switching circuit 181, the second feed source 170 may excite the second radiator 120 to support the second wireless signals of the fourth frequency band of different sub-frequency bands. For example, when the second wireless signal in the fourth frequency band is a low frequency signal of 5G, the second radiator 120 may support wireless signals in the frequency band range from 600MHz to 1GHz under the action of the second switching circuit 181. Of course, the second wireless signal in the fourth frequency band is not limited thereto, and the embodiment of the present application is not limited thereto.

It is understood that the plurality of second load branches 1811 of the second switching circuit 181 may include at least one of an inductive load branch and a capacitive load branch, but not limited to, the second switching circuit 181 may also include a switch, and of course, the second switching circuit 181 may not include a switch. The embodiment of the present application is not limited to the specific structure of the second switching circuit 181.

The third tuning module 180 of the embodiment of the present application includes the second switching circuit 181, where the second switching circuit 181 can control the antenna device 100 to support the second wireless signal of the fourth frequency band of different sub-frequency bands, so that the antenna device 100 can support to cover more wireless signals.

Based on the above structure of the antenna device 100, the embodiment of the present application further provides specific structures of the first tuning module 140, the second tuning module 150, and the third tuning module 180. Referring to fig. 9 and 10, fig. 9 is a schematic diagram illustrating a third structure of an antenna device 100 according to an embodiment of the application.

The first frequency selection circuit 1421 of the first tuning module 140 includes a first capacitor C1 and a first inductor L1, the second frequency selection circuit 1422 includes a second capacitor C2 and a second inductor L2, and the first capacitor C1, the first inductor L1, the second inductor L2 and the second capacitor C2 may be sequentially connected in series between the first feed 130 and the first feed point 113. The first tuning module 140 may further include a first tuning branch 1423, the first tuning branch 1423 may include a third capacitor C3 and a third inductor L3, one end of the third capacitor C3 may be electrically connected between the first inductor L1 and the second inductor L2, the other end of the third capacitor C3 may be electrically connected to one end of the third inductor L3, and the other end of the third inductor L3 is grounded. The first inductive load branch 1411 of the first switching circuit 141 of the first tuning module 140 may be a fourth inductance L4 with zero ohm, the first switching circuit 141 may include three first load branches 1412, for example, the first switching circuit 141 may include a fifth inductance L5, a sixth inductance L6, and a seventh inductance L7, one end of the fourth inductance L4 may be electrically connected between the first frequency selection circuit 1421 and the second frequency selection circuit 1422, the other end of the fourth inductance L4 may be electrically connected between the second frequency selection circuit 1422 and the first feeding point 113 through the first switching circuit 141, one ends of the fifth inductance L5, the sixth inductance L6, and the seventh inductance L7 may be grounded, and the other ends may be electrically connected between the second frequency selection circuit 1422 and the first feeding point 113 through the first switching circuit 141. The first switching circuit 141 may selectively turn on the two ends of the first inductive load branch 1411 with zero ohms and be electrically connected with the two ends of the second frequency selective circuit 1422 respectively to be connected with the second frequency selective circuit 1422 in parallel and make the second frequency selective circuit 1422 short-circuited, and the first switching circuit 141 may also disconnect the two ends of the first inductive load branch 1411 with zero ohms and the two ends of the second frequency selective circuit 1422 from each other. The first switching circuit 141 may also selectively turn on different first load branches 1412 so that the first radiator 110 and the second radiator 120 support wireless signals in different frequency bands or sub-frequency bands. The first tuning module 140 may further include a second tuning branch 1424, where the second tuning branch 1424 may include, but is not limited to, an eighth inductor L8, and one end of the eighth inductor L8 may be electrically connected between the first switching circuit 141 and the first feeding point 113, and the other end of the eighth inductor L8 may be grounded.

It is understood that the first capacitor C1 and the second capacitor C2 may be, but are not limited to, 1pf (picofarad), the first inductor L1 may be, but are not limited to, 3.0nh (nanohenry), the second inductor L2 may be, but are not limited to, 4.7nh, the third capacitor C3 may be, but are not limited to, 0.5pf, the fourth inductor L4 may be, but are not limited to, 1.0nh, the fifth inductor L5 may be, but are not limited to, 3.9nh, the sixth inductor L6 may be, but are not limited to, 15nh, the seventh inductor L7 may be, but are not limited to, 7.5nh, and the eighth inductor L8 may be, but are not limited to, 13nh.

It is appreciated that the first frequency selective circuit 1421, the second frequency selective circuit 1422, the first tuning leg 1423, and the second tuning leg 1424 may form the first matching circuit 142. That is, the first tuning module 140 may include a first matching circuit 142 and a first switching circuit 141, the first matching circuit 142 may perform impedance matching adjustment on the excitation signal provided by the first feed 130, and the first switching circuit 141 may adjust the frequency of the wireless signal supported by the first radiator 110 and the second radiator 120. The matching circuit is also called a matching network, and can perform impedance matching adjustment on an excitation signal provided by a feed source. The impedance refers to an impedance acting as a barrier to an excitation current in a circuit, and when the internal resistance of a feed source is equal in magnitude and phase to the characteristic impedance of a transmission line or the characteristic impedance of the transmission line is equal in magnitude and phase to a load impedance connected thereto, the input end or the output end of the transmission line is in an impedance matching state, or simply impedance matching.

It should be noted that, the first matching circuit 142, the first switching circuit 141, and the first tuning module 140 in the embodiment of the present application may also include other circuit structures, and the specific structures of the above components are not limited in the embodiment of the present application.

The band reject circuit 1821 of the second tuning module 150 may include a fourth capacitance C4, a ninth inductance L9, and a fifth capacitance C5. The fourth capacitor C4 and the ninth inductor L9 may be connected in parallel to each other to form a first whole, one end of the first whole may be electrically connected to the second feed source 170, the other end of the whole may be electrically connected to one end of the fifth capacitor C5, and the other end of the fifth capacitor C5 may be electrically connected to the second radiator 120. The second tuning module 150 further includes a third tuning branch 1822, a fourth tuning branch 1823, and a fifth tuning branch 1824, where the third tuning branch 1822 may include a tenth inductor L10, one end of the tenth inductor L10 may be electrically connected between the fifth capacitor C5 and the second radiator 120, and the other end of the tenth inductor L10 is grounded. The fourth tuning branch 1823 may include a sixth capacitance C6 and an eleventh inductance L11, and the sixth capacitance C6 and the eleventh inductance L11 may be connected in parallel to each other to form a second integral body, one end of which may be electrically connected between the first integral body and the second feed 170, and the other end of which may be grounded. The fifth tuning branch 1824 may include a twelfth inductance L12, and the twelfth inductance L12 may be connected in series between one end of the second integer and the second feed 170. The second switching circuit 181 of the second tuning module 150 may include four second load branches 1811, and the second switching circuit 181 may include a seventh capacitor C7, a thirteenth inductor L13, a fourteenth inductor L14, and a fifteenth inductor L15, where one ends of the seventh capacitor C7, the thirteenth inductor L13, the fourteenth inductor L14, and the fifteenth inductor L15 are grounded, and the other ends thereof may be electrically connected between one end of the tenth inductor L10 and one end of the fifth capacitor C5.

It is understood that the fourth capacitance C4 may be, but is not limited to, 0.5pf, the ninth inductance L9 may be, but is not limited to, 8.2nh, the fifth capacitance C5 may be, but is not limited to, 1.2pf, the tenth inductance L10 may be, but is not limited to, 62nh, the sixth capacitance C6 may be, but is not limited to, 5.6pf, the eleventh inductance L11 may be, but is not limited to, 8.2nh, the twelfth inductance L12 may be, but is not limited to, 0 ohm inductance, the seventh capacitance C7 may be, but is not limited to, 1.0pf, the thirteenth inductance L13 may be, but is not limited to, 27nh, the fourteenth inductance L14 may be, but is not limited to, 13nh, and the fifteenth inductance L15 may be, but is not limited to, 12nh.

It is appreciated that third tuning leg 1822, fourth tuning leg 1823, fifth tuning leg 1824, and bandstop circuit 1821 may form second matching circuit 182. That is, the first tuning module 140 may include a second matching circuit 182 and a second switching circuit 181, the second matching circuit 182 may perform impedance matching adjustment on the excitation signal provided by the second feed source 170, and the second switching circuit 181 may adjust the frequency of the wireless signal supported by the first radiator 110 and the second radiator 120.

It should be noted that, the second matching circuit 182, the second switching circuit 181, and the second tuning module 150 in the embodiment of the present application may also include other circuit structures, and the specific structures of the above components are not limited in the embodiment of the present application.

The third tuning module 180 may include a third switching circuit 151, where the third switching circuit 151 may include a plurality (two or more) of third load branches 1511, one end of each third load branch 1511 may be electrically connected to the electrical connection point 123 of the second radiator 120, the other end of each third load branch 1511 may be grounded, and the third switching circuit 151 may switch among the plurality of third load branches 1511 to adjust the frequency ranges of the first wireless signal and the second wireless signal supported by the first radiator 110 and the second radiator 120. The third switching circuit 151 may include, but is not limited to, a sixteenth inductor L16, an eighth capacitor C8, a ninth capacitor C9, a seventeenth inductor L17, and a tenth capacitor C10, wherein one end of the sixteenth inductor L16 and one end of the tenth capacitor C10 may be electrically connected to the electrical connection point 123 of the second radiator 120, and the other end of the eighth capacitor C8 may be electrically connected to the electrical connection point 123 of the second radiator 120, the other end of the eighth capacitor C8 may be electrically connected to one end of the ninth capacitor C9, and the other end of the ninth capacitor C9 may be grounded. The third tuning module 180 may further include a sixth tuning branch 152, where the sixth tuning branch 152 may include, but is not limited to, an eighteenth inductor L18, and one end of the eighteenth inductor L18 may be electrically connected between the third switching circuit 151 and the electrical connection point 123, and the other end of the eighteenth inductor L18 is grounded.

It is understood that the sixteenth inductor L16 may be, but is not limited to, zero ohm inductor, the eighth capacitor C8 and the ninth capacitor C9 may be, but is not limited to, 0.5pf, the seventeenth inductor L17 may be, but is not limited to, 2.2nh, the tenth capacitor C10 may be, but is not limited to, 1.2pf, and the eighteenth inductor L18 may be, but is not limited to, 1.8nh.

The third tuning module 180 and the third switching circuit 151 in the embodiment of the present application may also include other structures, and the specific structures of the above-mentioned components are not limited in the embodiment of the present application.

Based on the structures of the first tuning module 140, the second tuning module 150 and the third tuning module 180, the following describes the working manner of the embodiment of the present application by taking a Wi-Fi signal with a first wireless signal of 2.4G and a full-band signal with a second wireless signal of 5G as examples:

When the antenna apparatus 100 needs to support the Wi-Fi signal of 2.4G and the second wireless signal of the first frequency band of the N40, N41 frequency bands, since the first frequency selection circuit 1421 and the second frequency selection circuit 1422 of the first matching circuit 142 of the first tuning module 140 are connected in series, the first frequency selection circuit 1421 and the second frequency selection circuit 1422 may be bandpass matching circuits. At this time, the first inductive load branch 1411 (RF 3 branch) of the first switching circuit 141 is always equivalent to a series inductance for Wi-Fi signals of 2.4G and second wireless signals of N40 and N41 frequency bands, which is equivalent to directly feeding the first radiator 110, and the second radiator 120 forms a parasitic branch under the ground return action of the load branches corresponding to the second radiator 120, the second tuning module 150 and the third switching circuit 151 of the second tuning module 150, which are formed in the mouth-to-mouth with the first radiator 110, so that the current paths of Wi-Fi signals of 2.4G and second wireless signals of N40 and N41 frequency bands can be increased, thereby enhancing the radiation efficiency of Wi-Fi signals of 2.4G and second wireless signals of N40 and N41 frequency bands. The first feed 130 may excite a radiation segment between the first feed point 113 and the first end 111 as a main radiation segment, and a radiation segment between the third end 121 and the electrical connection point 123 as an auxiliary radiation segment to support Wi-Fi signals of 2.4G and second wireless signals (direct feed+parasitic mode) of N40/N41 frequency band together. Because the N40 band/N41 band is closer to the Wi-Fi band of 2.4G, the mode of the N40 band/N41 band is similar (or identical) to the mode of the Wi-Fi band of 2.4G.

When the antenna device 100 needs to support the Wi-Fi signal of 2.4G and the second wireless signals of the B1 band and the B3 band, because the first frequency selecting circuit 1421 and the second frequency selecting circuit 1422 of the first matching circuit 142 of the first tuning module 140 are mutually connected in series and are bandpass matching circuits, when the first inductive load branch 1411 (RF 3 branch) of the first switching circuit 141 is disconnected, the equivalent of the intermediate frequency B1 and the B3 band is a series capacitor, which is equivalent to the coupling feeding of the first radiator 110, and simultaneously, under the action of the ground return of the load branches corresponding to the second radiator 120, the second tuning module 150 and the third switching circuit 151 of the second tuning module 150 which form the port-to-port with the first radiator 110, the radiation efficiency of the B1 band and the B3 band can be increased, and simultaneously, by automatically switching the parallel inductance (RF 1 branch, RE2 branch and RF4 branch) of the switch corresponding to the first switching circuit 141, the equivalent of the electrical lengths of the intermediate frequency different bands can be changed, and the switching between the intermediate frequency and the intermediate frequency 1.7GHz and the 2.17GHz can be realized. The first feed 130 may excite a radiation segment between the second end 112 and the first end 111 of the first radiator 110 as a main radiation segment, and a radiation segment between the third end 121 and the electrical connection point 123 of the second radiator 120 as an auxiliary radiation segment to support wireless signals (coupling feed+parasitic mode) of the B1/B3 frequency band together.

When the antenna device 100 needs to support 2.4G Wi-Fi signals and N78 band second wireless signals, because the first frequency selecting circuit 1421 and the second frequency selecting circuit 1422 of the first matching circuit 142 of the first tuning module 140 are band-pass matching circuits connected in series, when the first inductive load branch 1411 (RF 3 branch) of the first tuning module 141 is turned on, the second wireless signals of the high-frequency N78 band are equivalent to series inductances (at this time, the Wi-Fi signals of 2.4G are equivalent to series inductances and belong to constant states), which is equivalent to directly feeding the first radiator 110, at this time, the corresponding load branches (RF 1 branch, RE2 branch, RF4 branch) of the first tuning module 141 can be turned on or off according to actual needs, so as to realize frequency offset adjustment of N78, and simultaneously, under the effect of the ground of the load branches corresponding to the first inductive load branches of the first radiator 110, the second tuning module 150 and the third switching circuit 151 of the second tuning module 150, the first excitation branch 130 can be used as a common radiation mode enhancement mode of the third antenna device with the fourth wavelength band to the third antenna device 122, and the fourth antenna device can be used as a parasitic radiation mode radiation band between the fourth wavelength band and the third antenna device 122 and the fourth antenna device can be used as a parasitic radiation band of the third antenna device with the radiation band of the fourth wavelength band and the third antenna device with the fourth wavelength band and the antenna device can be supported by the radiation mode.

When the antenna device 100 needs to support the Wi-Fi signal of 2.4G and the second radio signal of low frequency, the band-stop circuit 1821 of the second tuning module 150 may be configured by connecting the fifth capacitor C5 with a capacitance of 1.2pf and the band-stop formed by connecting the fourth capacitor C4 with the ninth inductor L9 of 8.2nh in parallel to form a series-parallel circuit, where the series-parallel circuit may equivalently couple and feed the low frequency signal to the small series capacitor (about 1.5-1.8 pf), and simultaneously cooperate with the second switching circuit 181 to perform parallel connection with a large inductance (for example, 10nh-100 nh) or parallel connection with a small parallel capacitor (0.5 pf-1 pf) to perform low frequency switching, so as to implement frequency band switching between 600MHz and 1 GHz. The second feed 170 may excite a radiation segment between the second feeding point 124 to the fourth end 122 of the second radiator 120 to support a second wireless signal of a low frequency band in an eighth wavelength mode. The band stop formed by the parallel connection of the fourth capacitor C4 of 0.5pf and the ninth inductor L9 of 8.2nh can realize the frequency cut-off of 2.4GHz-2.5GHz, so that the second tuning module 150 comprises the band stop circuit 1821, and can ensure that the high-order mode generated by the low-frequency resonance cannot fall in the band of the Wi-Fi signal of 2.4G while the low-frequency is switched, so that the efficiency pit generated on the Wi-Fi signal of 2.4G can be avoided, and further, the condition of the Wi-Fi signal of 2.4G is relatively stable and no obvious efficiency pit is generated no matter whether the low frequency is switched or the medium-high frequency is switched in the frequency band.

Referring to fig. 11 to 16, fig. 11 is a first antenna parameter curve of the antenna device 100 shown in fig. 10, fig. 12 is a second antenna parameter curve of the antenna device 100 shown in fig. 10, fig. 13 is a third antenna parameter curve of the antenna device 100 shown in fig. 10, fig. 14 is a fourth antenna parameter curve of the antenna device 100 shown in fig. 10, fig. 15 is a fifth antenna parameter curve of the antenna device 100 shown in fig. 10, and fig. 16 is a sixth antenna parameter curve of the antenna device 100 shown in fig. 10.

Curves S1 to S3 in fig. 11 are respectively an antenna S11 parameter curve, a radiation efficiency curve and a system total efficiency curve of the antenna device 100 supporting B3/N3/B40/n40+n41 in a Non-independent networking state (Non-Standalone, NSA for short). Curves S4 to S6 in fig. 12 are an antenna S11 parameter curve, a radiation efficiency curve, and a system total efficiency curve when the antenna device 100 supports N78/B41/N41, respectively. Curves S7 to S9 in fig. 13 are an antenna S11 parameter curve, a radiation efficiency curve and a system total efficiency curve when the antenna device 100 supports B32/N75, respectively. Curves S10 to S12 in fig. 14 are an antenna S11 parameter curve, a radiation efficiency curve, and a system total efficiency curve when the antenna device 100 supports N79, respectively. Curves S13 to S15 in fig. 15 are an antenna S11 parameter curve, a radiation efficiency curve, and a system total efficiency curve, respectively, when the antenna device 100 supports N71 (616 MHz-689 MHz). Curves S16 to S18 in fig. 16 are an antenna S11 parameter curve, a radiation efficiency curve, and a system total efficiency curve when the antenna device 100 supports N71 (616 MHz-689 MHz), respectively. As can be seen from fig. 11 to 16, when the second wireless signal of the antenna device 100 is switched to the middle-high frequency (B1, B3, B40, B41) band, the antenna efficiency is better at each frequency of the middle-high frequency, and is-3 dB to-4 dB (the antenna efficiency of B32 is-4.5 dB), when the second wireless signal of the antenna device 100 is switched to the UHB-N78 band, the antenna efficiency is better at-4 dB to-5 dB, when the second wireless signal of the antenna device 100 is switched to the UHB-N79 band, the antenna efficiency is better at-4 dB, and when the second wireless signal of the antenna device 100 is switched to the low frequency-N71 band, the antenna efficiency is better at-7 dB, and when the second wireless signal is in each frequency band, the Wi-Fi antenna efficiency of 2.4G is stable at-3.3 dB to-4.5 dB, thereby realizing the same antenna system, and the first radiator 110 and the second radiator 120 cover the full-cellular-2.4G Wi-Fi signal design.

The above is merely an exemplary description of the antenna device 100 according to the embodiment of the present application. The schemes of the antenna device 100 according to the embodiments of the present application may be arbitrarily combined without conflict.

For example, the embodiment of the present application further provides an antenna apparatus 100, including a first radiator 110, a first feed 130, a second radiator 120, a second feed 170, and a band-stop circuit 1821. The first radiator 110 includes a first end 111 and a second end 112, and a first feeding point 113 disposed between the first end 111 and the second end 112, the second end 112 being grounded. The first feed 130 is electrically connected to the first feed point 113. The second radiator 120 includes a third end 121 and a fourth end 122, an electrical connection point 123 and a second feeding point 124 disposed between the third end 121 and the fourth end 122, the third end 121 and the first end 111 are disposed at intervals, the fourth end 122 extends in a direction away from the first radiator 110 and is grounded, and the second feeding point 124 is disposed between the electrical connection point 123 and the fourth end 122. The second feed 170 is electrically connected to the second feed point 124. The band reject circuit 1821 is connected in series between the second feed 170 and the second feed point 124. The first feed 130 is configured to excite the first radiator 110 and the second radiator 120 to support the first wireless signal, the second feed 170 is configured to excite the second radiator 120 to generate a resonant mode and support a second wireless signal in a fourth frequency band, and the band reject circuit 1821 is configured to cut off a frequency multiplication signal corresponding to the frequency multiplication resonant mode of the resonant mode, where a frequency band range of the frequency multiplication signal at least partially overlaps a frequency band range of the first wireless signal.

The antenna device 100 further includes a first tuning module 140 and a second tuning module 150. When the second tuning module 150 performs tuning and the first tuning module 140 is in the first state of the first tuning mode, the first feed 130 may excite the first radiator 110 and the second radiator 120 to support at least one of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the second frequency band. When the second tuning module 150 performs tuning and the first tuning module 140 is in the second state of the second tuning mode, the first feed 130 may excite the first radiator 110 and the second radiator 120 to support at least one of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the third frequency band. The third frequency band is different from the first frequency band, the second frequency band, and the frequency of the first wireless signal.

It is understood that the first tuning module 140 includes a first switching circuit 141, and a first frequency selecting circuit 1421 and a second frequency selecting circuit 1422 serially connected in sequence between the first feed 130 and the first feeding point 113, the first switching circuit 141 includes a first inductive load branch 1411 with zero ohms, one end of the first inductive load branch 1411 is electrically connected between the first frequency selecting circuit 1421 and the second frequency selecting circuit 1422, and the other end of the first inductive load branch 1411 is switchably connected or disconnected between the second frequency selecting circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 can be electrically connected to both ends of the second frequency selecting circuit 1422, or the first inductive load branch 1411 can be disconnected from both ends of the second frequency selecting circuit 1422. The first switching circuit 141 may turn on the other end of the first inductive load branch 1411 to be electrically connected between the second frequency selective circuit 1422 and the first feeding point 113, so that the first tuning module 140 is in the first tuning mode. The first switching circuit 141 may also disconnect the electrical connection between the other end of the first inductive load branch 1411 and the second frequency selective circuit 1422 and the first feed point 113 to place the first tuning module 140 in the second tuning mode. The first feed 130 may excite the first radiator 110 and the second radiator 120 to support at least one wireless signal of the first wireless signal, the second wireless signal of the first frequency band, and the second wireless signal of the second frequency band when the first switching circuit 141 turns on the other end of the first inductive load branch 1411 and is electrically connected between the second frequency selecting circuit 1422 and the first feeding point 113, so that the first inductive load branch 1411 is in a first tuning mode electrically connected to the two ends of the second frequency selecting circuit 1422 and in a first state where the second tuning module 150 performs tuning.

The above is merely an exemplary description of the antenna device 100 according to the embodiment of the present application, and the antenna device 100 may have other structures, and the embodiment of the present application is not limited to the specific structure of the antenna device 100.

Based on the above structure of the electronic device 10, the embodiment of the present application further provides an electronic device 10, where the electronic device 10 may be a smart phone, a tablet computer, or other devices, and may also be a game device, an augmented reality (Augmented Reality, abbreviated as AR) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or the like. Referring to fig. 17, fig. 17 is a schematic diagram of a first structure of an electronic device 10 according to an embodiment of the application. The electronic device 10 may comprise the antenna arrangement 100 of any of the embodiments described above.

As shown in fig. 17, the electronic device 10 further includes a display screen 200, a center 300, a circuit board 400, a battery 500, and a rear case 600.

The display screen 200 may be mounted on the middle frame 300 and connected to the rear case 600 through the middle frame 300 to form a display surface of the electronic device 10. The display screen 200 may be used to display information such as images, text, and the like. The display screen 200 may be an Organic Light-Emitting Diode (Organic Light-Emitting Diode), an OLED display device or an Organic Light-Emitting Diode (OLED) display, or the like.

The middle frame 300 may include a rim 310 and a middle plate 320, the rim 310 may form an outer rim 310 of the electronic device 10, and the middle plate 320 may provide support for the electronics or electronics in the electronic device 10. The frame 310 and the middle plate 320 may form a receiving space, and electronic components and electronic devices in the electronic apparatus 10 may be mounted and fixed in the receiving space.

The circuit board 400 may be mounted on the middle frame 300. The circuit board 400 may be a motherboard of the electronic device 10. One, two or more of microphone, speaker, receiver, earphone interface, universal serial bus interface (USB interface), camera module, distance sensor, environmental sensor, gyroscope, and processor may be integrated on the circuit board 400. Wherein the display screen 200 may be electrically connected to the circuit board 400 to control the display of the display screen 200 by a processor on the circuit board 400.

The battery 500 may be mounted to the middle frame 300. Meanwhile, the battery 500 is electrically connected to the circuit board 400 to realize that the battery 500 supplies power to the electronic device 10. A power management circuit may be provided on the circuit board 400. The power management circuit is used to distribute the voltage provided by the battery 500 to the various electronic devices in the electronic device 10.

The rear case 600 may be connected with the middle frame 300. The rear case 600 is used to seal the electronic devices and functional components of the electronic device 10 inside the electronic device 10 together with the middle frame 300 and the display screen 200 to form a protective effect for the electronic devices and functional components of the electronic device 10.

It is understood that the ground system 160 of the embodiment of the present application may be formed on the rear case 600, the circuit board 400, or the middle board 320, and a conductor area having a zero potential may be disposed on the rear case 600, the circuit board 400, or the middle board 320, and the ground system 160 may be disposed on the conductor area. For example, the middle plate 320 and the circuit board 400 may each be provided with a conductor region having a zero potential, the second end 112 of the first radiator 110 and the fourth end 122 of the second radiator 120 may be electrically connected to the middle plate 320 (the conductor region having a zero potential) to achieve grounding of the second end 112 and the fourth end 122, and the second tuning module 150 may be electrically connected to the circuit board 400 (the conductor region having a zero potential) to achieve grounding. It should be noted that when the electronic device 10 includes a plurality of grounded conductor areas, the plurality of grounded conductor areas may ultimately be electrically connected to form an integral ground system 160. It should be noted that, the second end 112 of the first radiator 110 and the fourth end 122 of the second radiator 120, and the second tuning module 150 of the embodiment of the present application may be electrically connected to the conductor region with the same potential being zero to implement grounding. The specific grounding modes of the electronic device 10 and the antenna device 100 are not limited in the embodiments of the present application.

It will be understood that one or more of the first feed 130, the second feed 170, the first tuning module 140, the second tuning module 150, and the third tuning module 180 in the embodiments of the present application may be, but not limited to, disposed on the circuit board 400, and of course, one or more of the foregoing components may also be disposed on a small board of the electronic device 10.

It is understood that when the frame 310 of the middle frame 300 is a conductor structure, the first radiator 110 and the second radiator 120 may be formed on the frame 310. For example, referring to fig. 18, fig. 18 is a schematic diagram of a second structure of an electronic device according to an embodiment of the present application, a plurality of slits may be formed on a frame 310 to form a first metal branch 311 and a second metal branch 312 on the frame 310, the first radiator 110 may include the first metal branch 311, and the second radiator 120 may include the second metal branch 312. The gaps may be filled with a non-conductive material having a color similar to that of the rear case 600, so as to improve the structural strength of the frame 310.

It should be noted that the first radiator 110 and the second radiator 120 may be disposed in other spaces of the electronic device 10, for example, but not limited to, the circuit board 400 may be printed, sprayed, or the like to form three radiators. The embodiment of the application does not limit the specific forming modes of the three radiators.

The antenna scheme of the embodiment of the present application is applicable to the electronic device 10 of the 5G bar type and the electronic device 10 of the curved screen, and may also be applicable to the electronic device 10 of the form of a roll, a fold, or the like. The embodiment of the present application is not limited to the specific form of the electronic device 10.

It should be noted that the above is merely an exemplary illustration of the electronic device 10 according to the embodiment of the present application, and the electronic device 10 may further include an image capturing module, an electroacoustic conversion module, etc., and the embodiment of the present application is not limited to the specific structure of the electronic device 10.

According to the antenna device 100 and the electronic equipment 10 provided by the embodiment of the application, the 5G mobile cellular full-band (600 MHz to 5 GHz) and the 2.4G Wi-Fi are integrated into one antenna system, the combined tuning is performed under the holding of three tuning modules, the performance of the 2.4G Wi-Fi signal is moderate and stable and good while the switching of any cellular band is ensured, the performance is moderate and maintained between-3.3 dB and-4.5 dB, the fluctuation is less than 1.5dB, and the daily use quality of the user cellular signal and the Wi-Fi signal is greatly improved. Meanwhile, the cellular frequency band signal and the 2.4G Wi-Fi signal are not split into two independent antennas, so that the space of the antennas is greatly saved, the number of the antennas is reduced, and the workload of decoupling, interference and the like of multiple antennas in the later stage is also reduced. In addition, the antenna system formed by the first radiator 110 and the second radiator 120 only needs to form a gap on the frame 310, so that the attractive appearance of the electronic device 10 is improved, and meanwhile, the Wi-Fi antenna is not independently designed in the form of an LDC or FPS antenna and the like, so that the product cost and the debugging man-hour are greatly saved.

In the description of the present application, it should be understood that terms such as "first," "second," and the like are used merely to distinguish between similar objects and should not be construed to indicate or imply relative importance or implying any particular order of magnitude of the technical features indicated.

The antenna device and the electronic device provided by the embodiment of the application are described in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application and are provided to aid in the understanding of the present application. Meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.

Claims

1. An antenna device, comprising:

the first feed source is electrically connected with the first feed point;

In a first state that the second tuning module performs tuning and the first tuning module is in a first tuning mode, the first feed source is used for exciting the first radiator and the second radiator to support a first wireless signal, a second wireless signal of a first frequency band and a second wireless signal of a second frequency band;

In a second state that the second tuning module performs tuning and the first tuning module is in a second tuning mode, the first feed source is used for exciting the first radiator and the second radiator to support the first wireless signal, a second wireless signal of the first frequency band and a second wireless signal of a third frequency band, and the third frequency band is different from the frequencies of the first frequency band, the second frequency band and the first wireless signal;

The first tuning module comprises a first switching circuit, a first frequency selecting circuit and a second frequency selecting circuit which are sequentially connected in series between the first feed source and the first feed point, wherein the first switching circuit comprises a first inductive load branch circuit with zero ohm, and one end of the first inductive load branch circuit is electrically connected between the first frequency selecting circuit and the second frequency selecting circuit;

the first switching circuit is used for conducting the other end of the first inductive load branch circuit and is electrically connected between the second frequency selection circuit and the first feed point, so that the first tuning module is in the first tuning mode;

the first switching circuit is further configured to disconnect the electrical connection between the other end of the first inductive load branch and the second frequency selection circuit and the first feed point, so that the first tuning module is in the second tuning mode.

2. The antenna device according to claim 1, wherein in the first state or the second state, the first feed is configured to excite the first radiator and the second radiator to generate a first resonant mode together, and the first resonant mode is configured to form a first resonant current flowing in a direction from the first feed point to the electrical connection point, so as to support at least one of the first wireless signal and the second wireless signal in the first frequency band.

3. The antenna device of claim 1, wherein in the first state the first feed is configured to excite the first radiator and the second radiator to collectively create a second resonant mode that forms a current zero between the electrical connection point and the fourth terminal, the second resonant mode being configured to form a second resonant current that flows in a direction from the first feed point to the current zero and in a direction from the fourth terminal to the current zero to support a second wireless signal in the second frequency band.

4. The antenna device of claim 1, wherein in the second state the first feed is configured to excite the first and second radiators to create a third resonant mode that forms a third resonant current flowing in a direction from the second end to the electrical connection point to support a second wireless signal in the third frequency band.

5. The antenna device according to claim 1, wherein said first switching circuit further comprises a plurality of load branches, one end of each of said load branches being switchably connected to or disconnected from electrical connection between said second frequency selection circuit and said first feed point, the other end of each of said load branches being grounded, said first switching circuit switching between said plurality of load branches to adjust a frequency range of at least one of said second frequency band and said third frequency band.

6. The antenna device according to any one of claims 1 to 5, wherein the second radiator further comprises a second feeding point, the second feeding point being located between the electrical connection point and the fourth end, the antenna device further comprising:

A second feed source electrically connected to the second feed point, and

A third tuning module electrically connected between the second feed source and the second feed point,

And under the action of the third tuning module, the second feed source is used for exciting the second radiator to generate a fourth resonance mode so as to support a second wireless signal of a fourth frequency band.

7. The antenna device according to claim 6, wherein the fourth resonant mode is used to form a fourth resonant current flowing in a direction from the second feed point to the fourth terminal to support the second wireless signal of the fourth frequency band.

8. The antenna device of claim 6, wherein the third tuning module comprises:

and the band-stop circuit is connected in series between the second feed source and the second feed point and is used for stopping the frequency multiplication signal corresponding to the frequency multiplication resonance mode of the fourth resonance mode, and the frequency range of the frequency multiplication signal is at least partially overlapped with the frequency range of the first wireless signal.

9. The antenna device of claim 8, wherein the third tuning module further comprises:

one end of the second switching circuit is electrically connected between the band-stop circuit and the second feed point, the other end of the second switching circuit is grounded, and the second switching circuit is used for adjusting the frequency range of the fourth frequency band.

10. The antenna device according to any one of claims 1 to 5, wherein the first wireless signal comprises a 2.4G wireless fidelity signal, a 5G wireless fidelity signal, a bluetooth signal, a GPS L1 band signal, or a GPS L5 band signal;

the second wireless signal includes a full-band signal of 5G or a full-band signal of 4G.

11. An electronic device comprising an antenna arrangement as claimed in any one of claims 1 to 10.

12. The electronic device of claim 11, further comprising a bezel on which a first metal branch and a second metal branch are formed by slotting, wherein the first radiator comprises the first metal branch, and wherein the second radiator comprises the second metal branch.

13. The electronic device of claim 11, further comprising a midplane and a circuit board, wherein the second and fourth ends are electrically connected to the midplane to achieve ground and the second tuning module is connected to the circuit board to achieve ground.