Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment. The antenna assembly comprises a first antenna radiator; a second antenna radiator and a third antenna radiator. The second antenna radiator is connected to one end of the first antenna radiator, and the second antenna radiator is coupled with the first antenna radiator. One part of the third antenna radiator is opposite to the first antenna radiator and is arranged at an interval, the third antenna radiator is coupled with the first antenna radiator, the other part of the third antenna radiator is opposite to the second antenna radiator and is arranged at an interval, and the third antenna radiator is coupled with the second antenna radiator; wherein a first coupling path for direct coupling and a second coupling path for indirect coupling through the third antenna radiator are arranged between the first antenna radiator and the second antenna radiator, and the current phase of the second coupling path is opposite to the current phase of the first coupling path. The antenna assembly and the electronic equipment provided by the invention are relatively good in isolation degree.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to an antenna assembly and an electronic device. Background Art

[0002] With the development of wireless communication technology, the number of antennas in electronic devices is increasing, and the isolation between antennas is gradually getting worse. Therefore, how to improve the isolation between antennas has become a technical problem that needs to be solved. Summary of the invention

[0003] The present application provides an antenna assembly and an electronic device capable of improving isolation.

[0004] In one aspect, the present application provides an antenna assembly, comprising:

[0005] a first antenna radiator;

[0006] A second antenna radiator is connected to one end of the first antenna radiator, and the second antenna radiator is coupled to the first antenna radiator; and

[0007] a third antenna radiator, part of the third antenna radiator being opposite to and spaced from the first antenna radiator, and the third antenna radiator being coupled to the first antenna radiator, and another part of the third antenna radiator being opposite to and spaced from the second antenna radiator, and the third antenna radiator being coupled to the second antenna radiator;

[0008] There is a first coupling path for direct coupling and a second coupling path for indirect coupling via the third antenna radiator between the first antenna radiator and the second antenna radiator, and a current phase of the second coupling path is opposite to a current phase of the first coupling path.

[0009] On the other hand, the present application also provides an electronic device, including a frame and the antenna assembly, wherein the first antenna radiator and the second antenna radiator are arranged on the frame, and the third antenna radiator is located inside the frame.

[0010] The antenna assembly provided in the present application includes a first antenna radiator, a second antenna radiator and a third antenna radiator. The second antenna radiator is directly coupled to the first antenna radiator to form a first coupling path; the third antenna radiator is coupled to the first antenna radiator, and the third antenna radiator is also coupled to the second antenna radiator. Therefore, the second antenna radiator and the first antenna radiator are also coupled with each other through the third antenna radiator. The path of the second antenna radiator and the first antenna radiator coupled with each other through the third antenna radiator is the second coupling path; by making the current phase of the second coupling path opposite to the current phase of the first coupling path, the coupling energy between the first antenna radiator and the second antenna radiator can be offset against each other, thereby improving the isolation between the second antenna radiator and the first antenna radiator, which is also beneficial to the high-frequency and multi-frequency development of the antenna assembly and the layout of the antenna assembly in electronic devices with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments are briefly introduced below.

[0012] Figure 1 A schematic diagram of the appearance structure of an electronic device provided in an embodiment of the present application;

[0013] Figure 2 for Figure 1 The electronic device shown includes a planar structural schematic diagram of a frame and an antenna assembly;

[0014] Figure 3 for Figure 1 The electronic device shown includes another planar structural schematic diagram of a frame and an antenna assembly;

[0015] Figure 4 for Figure 2 A schematic diagram of a planar structure in which a third antenna radiator of the electronic device is arranged on a back cover;

[0016] Figure 5 for Figure 2 A schematic diagram of a planar structure in which a third antenna radiator of the electronic device is arranged on a mainboard;

[0017] Figure 6 A schematic diagram of the structure of an antenna assembly provided in an embodiment of the present application;

[0018] Figure 7 for Figure 6 A schematic diagram of a coupling current generated by a second antenna radiator of the antenna assembly under the excitation of a first antenna radiator;

[0019] Figure 8 for Figure 6A schematic diagram showing a first coupling path directly coupled between a first antenna radiator and a second antenna radiator of the antenna assembly and a second coupling path indirectly coupled through a third antenna radiator;

[0020] Fig. 9 for Figure 8 A schematic diagram of the current direction of the first coupling path and the second coupling path of the antenna assembly at a certain moment;

[0021] Fig.10 for Figure 8 A schematic diagram showing a case where the spacing distance between the third antenna radiator and the first antenna radiator of the antenna assembly is a first preset distance, and the spacing distance between the third antenna radiator and the first antenna radiator is a second preset distance;

[0022] Fig.11 for Figure 8 The antenna assembly shown also includes a planar structural schematic diagram of a radio frequency signal source and a reference ground;

[0023] Fig.12 for Fig.11 A schematic diagram of a planar structure in which the first antenna radiator of the antenna assembly includes a first free end, a first feeding point and a first grounding end, and the second antenna radiator includes a second grounding end, a second feeding point and a second free end;

[0024] Fig.13 for Fig.12 A schematic diagram of a planar structure in which a first free end, a first feeding point, a first grounding end, a second free end, a second feeding point and a second grounding end of the antenna assembly are arranged in sequence;

[0025] Fig.14 for Fig.12 A schematic diagram of a planar structure in which the first ground terminal and the second ground terminal of the antenna assembly overlap;

[0026] Fig.15 for Fig.14 A schematic diagram of a planar structure in which the third antenna radiator of the antenna assembly is arranged opposite to and spaced from the first antenna radiator and the second antenna radiator along a second direction;

[0027] Fig.16 for Fig.15 A schematic diagram of a planar structure of a third antenna radiator of the antenna assembly shown includes a first edge, a second edge, a third edge and a fourth edge;

[0028] Fig.17 for Fig.16 A schematic diagram of a planar structure in which the size of a first edge of the antenna assembly is smaller than the size of a second edge;

[0029] Fig.18 for Fig.16 A schematic diagram of a planar structure in which the size of the second edge and the size of the fourth edge of the antenna assembly are greater than or equal to 1 / 2 wavelength of the electromagnetic wave signal received and sent by the third antenna radiator;

[0030] Fig.19 for Fig.18 A schematic diagram of current directions of the first antenna radiator, the second antenna radiator and the third antenna radiator of the antenna assembly;

[0031] Fig. 20 for Fig.18 A schematic diagram of a planar structure of a third antenna radiator of the antenna assembly including a third feeding point located at a third edge;

[0032] Fig.21 for Fig. 20 The antenna assembly shown also includes a planar structural schematic diagram of at least one capacitor;

[0033] Fig. 22 Another structural schematic diagram of an antenna assembly provided in an embodiment of the present application;

[0034] Fig.23 for Fig. 22 An S parameter curve of the first antenna radiator, the second antenna radiator and the third antenna radiator of the antenna assembly when working simultaneously;

[0035] Fig.24 for Fig. 22 S parameter curves of the first antenna radiator and the second antenna radiator of the antenna assembly when the first antenna radiator and the second antenna radiator are working without the third antenna radiator;

[0036] Fig.25 for Fig. 22 The S-parameter curve of the third antenna radiator of the antenna assembly shown in FIG. 1 when working alone.

[0037] Description of reference numerals:

[0038] Electronic device 100; frame 20; antenna assembly 10; first sub-frame 201; second sub-frame 202; third sub-frame 203; fourth sub-frame 204; first antenna radiator 101; second antenna radiator 102; third antenna radiator 103; back cover 30; main board 40; first coupling path AB; second coupling path CD; first sub-coupling path ab; second sub-coupling path ef; third sub-coupling path cd; RF signal source 50; reference ground 60; first free end 110; first feeding point 111; first grounding end 112; second grounding end 120; second feeding point 121; second free end 122; first sub-antenna radiator 135; second sub-antenna radiator 136; first edge 130; second edge 131; third edge 132; fourth edge 133; third feeding point 134; capacitor 104. DETAILED DESCRIPTION

[0039] The technical solution provided by the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments described in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0040] References to "embodiments" and "implementations" in this application mean that the specific features, structures, or characteristics described in conjunction with the embodiments or implementations may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0041] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order; in addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0042] like Figure 1 As shown, Figure 1 This is a schematic diagram of the appearance structure of an electronic device 100 provided in an embodiment of the present application. The electronic device 100 may be a mobile phone, a tablet computer, a watch, a drone, a robot, or other device with a wireless communication function. The present embodiment of the present application takes a mobile phone as an example.

[0043] Please refer to Figure 2 and Figure 3 , the electronic device 100 includes a frame 20 and an antenna assembly 10 . Figure 2The electronic device 100 provided in the embodiment of the present application includes a planar structural diagram of a frame 20 and an antenna assembly 10. Figure 3 The electronic device 100 provided in the embodiment of the present application includes another planar structural schematic diagram of a frame 20 and an antenna assembly 10 .

[0044] Among them, the frame 20 can be a conductive frame or a non-conductive frame. When the frame 20 is a conductive frame, the material of the frame 20 can be metal, alloy, etc. When the frame 20 is a non-conductive frame, the material of the frame 20 can be plastic, glass, ceramic, etc. In the embodiment of the present application, the frame 20 is roughly rectangular. The frame 20 includes a first sub-frame 201, a second sub-frame 202, a third sub-frame 203 and a fourth sub-frame 204 connected end to end. In the embodiment of the present application, the first sub-frame 201 can be understood as a top frame. The second sub-frame 202 can be understood as a left side frame. The third sub-frame 203 can be understood as a right side frame. The fourth sub-frame 204 can be understood as a bottom frame. Of course, in other embodiments, the frame 20 can be square, circular, etc.

[0045] The antenna assembly 10 includes a first antenna radiator 101, a second antenna radiator 102 and a third antenna radiator 103. The first antenna radiator 101 and the second antenna radiator 102 are disposed on the frame 20. The third antenna radiator 103 is located inside the frame 20.

[0046] In the embodiment of the present application, the first antenna radiator 101 and the second antenna radiator 102 are provided on the first sub-frame 201. Of course, in other possible embodiments, the first antenna radiator 101 and the second antenna radiator 102 may be provided on at least one of the second sub-frame 202, the third sub-frame 203 and the fourth sub-frame 204. The first antenna radiator 101 and the second antenna radiator 102 may be frame-type antenna radiators or embedded antenna radiators.

[0047] In a possible embodiment, Figure 2As shown, the first antenna radiator 101 and the second antenna radiator 102 are both frame-type antenna radiators. In other words, the first antenna radiator 101 reuses part of the first sub-frame 201. The second antenna radiator 102 reuses part of the first sub-frame 201. In this embodiment, the first sub-frame 201 needs to be a conductive frame 20. By making the first antenna radiator 101 and the second antenna radiator 102 as frame-type antenna radiators, it is beneficial for the first antenna radiator 101 and the second antenna radiator 102 to radiate directly toward the outside of the electronic device 100, and it can avoid the radiation signal of the first antenna radiator 101 and the radiation signal of the second antenna radiator 102 from being lost when passing through the frame 20, thereby improving the communication performance of the electronic device 100. In addition, the first antenna radiator 101 reuses part of the frame 20, and the second antenna radiator 102 reuses part of the frame 20, which can reduce the internal space occupied by the first antenna radiator 101 and the second antenna radiator 102 in the electronic device 100, and facilitate the arrangement of other internal components in the electronic device 100.

[0048] In another possible embodiment, Figure 3 As shown, the first antenna radiator 101 and the second antenna radiator 102 are both embedded antenna radiators. It can be understood that the first antenna radiator 101 is embedded in the first sub-frame 201. The second antenna radiator 102 is embedded in the first sub-frame 201. In this embodiment, the first sub-frame 201 can be a frame made of plastic, glass, ceramic, etc. By making the first antenna radiator 101 and the second antenna radiator 102 as embedded antenna radiators, the restrictions on the material of the frame 20 can be reduced, and the application range of the antenna assembly 10 can be expanded.

[0049] In the following embodiments, if not explicitly stated, it is taken that both the first antenna radiator 101 and the second antenna radiator 102 are antenna radiators of the frame 20 .

[0050] The third antenna radiator 103 is located in the frame 20. In a possible embodiment, Figure 4As shown, the electronic device 100 may further include a back cover 30 connected to one side of the frame 20. The third antenna radiator 103 may be located within the frame 20 and disposed on the back cover 30. The manner in which the third antenna radiator 103 is disposed on the back cover 30 includes but is not limited to that the third antenna radiator 103 is directly molded on the back cover 30; or, the third antenna radiator 103 is molded and then fixedly connected to the back cover 30. Optionally, the third antenna radiator 103 is located on the inner surface of the back cover 30; or, the third antenna radiator 103 is located on the outer surface of the back cover 30; or, the third antenna radiator 103 is located in the interlayer of the back cover 30. Among them, the inner surface of the back cover 30 can be understood as the surface of the back cover 30 facing the internal space of the electronic device 100; and the outer surface of the back cover 30 can be understood as the surface of the back cover 30 facing the outside of the electronic device 100. In another possible embodiment, as Figure 5 As shown, the electronic device 100 may further include a mainboard 40 located in the frame 20. The third antenna radiator 103 may be located in the frame 20 and disposed on the mainboard 40. The manner in which the third antenna radiator 103 is disposed on the mainboard 40 includes but is not limited to directly molding the third antenna radiator 103 on the mainboard 40; or, the third antenna radiator 103 is molded and then fixedly connected to the mainboard 40. The third antenna radiator 103 may be one of a flexible printed circuit (FPC) antenna radiator, a laser direct structuring (LDS) antenna radiator, and a printed circuit board (PCB) antenna radiator.

[0051] like Figure 6 As shown, Figure 6 The schematic diagram of the structure of an antenna assembly 10 provided in an embodiment of the present application is as follows. The antenna assembly 10 includes a first antenna radiator 101 , a second antenna radiator 102 and a third antenna radiator 103 .

[0052] The first antenna radiator 101 can be one of a receiving antenna radiator, a transmitting antenna radiator, and an antenna radiator with integrated transceiver. In the embodiment of the present application, an antenna radiator with integrated transceiver is taken as an example. It can be understood that the first antenna radiator 101 can receive and transmit electromagnetic wave signals.

[0053] The second antenna radiator 102 may be one of a receiving antenna radiator, a transmitting antenna radiator, and an antenna radiator with integrated transceiver. In the embodiment of the present application, an antenna radiator with integrated transceiver is taken as an example. It can be understood that the second antenna radiator 102 can receive and transmit electromagnetic wave signals. The second antenna radiator 102 is connected to one end of the first antenna radiator 101. Among them, the second antenna radiator 102 can be directly connected to one end of the first antenna radiator 101, or it can be indirectly connected to one end of the first antenna radiator 101. In the embodiment of the present application, the second antenna radiator 102 is directly connected to the first antenna radiator 101. The second antenna radiator 102 is coupled to the first antenna radiator 101. It can be understood that the current of the first antenna radiator 101 can be coupled to the second antenna radiator 102. The current of the second antenna radiator 102 can be coupled to the first antenna radiator 101. In other words, the second antenna radiator 102 can generate a coupling current under the excitation of the first antenna radiator 101. The first antenna radiator 101 can generate a coupling current under the excitation of the second antenna radiator 102 .

[0054] In a possible application scenario, Figure 7 As shown, Figure 7 The solid arrow indicates the radiation current of the first antenna radiator 101. The dotted arrow indicates the coupling current generated by the second antenna radiator 102 under the excitation of the first antenna radiator 101. The amplitude of the coupling current generated by the second antenna radiator 102 is smaller than the amplitude of the radiation current of the first antenna radiator 101 itself.

[0055] The third antenna radiator 103 may be one of a receiving antenna radiator, a transmitting antenna radiator, and an antenna radiator with integrated transceiver. In the embodiment of the present application, an antenna radiator with integrated transceiver is taken as an example. It can be understood that the third antenna radiator 103 can receive and transmit electromagnetic wave signals. Part of the third antenna radiator 103 is opposite to and spaced from the first antenna radiator 101, and the third antenna radiator 103 is coupled to the first antenna radiator 101. It can be understood that the current of the first antenna radiator 101 can be coupled to the third antenna radiator 103. The current of the third antenna radiator 103 can be coupled to the first antenna radiator 101. In other words, the third antenna radiator 103 can generate a coupling current under the excitation of the first antenna radiator 101. The first antenna radiator 101 can generate a coupling current under the excitation of the third antenna radiator 103. Another part of the third antenna radiator 103 is opposite to and spaced from the second antenna radiator 102, and the third antenna radiator 103 is coupled to the second antenna radiator 102. It can be understood that the current of the second antenna radiator 102 can be coupled to the third antenna radiator 103. The current of the third antenna radiator 103 can be coupled to the second antenna radiator 102. In other words, the third antenna radiator 103 can generate a coupled current under the excitation of the second antenna radiator 102. The second antenna radiator 102 can generate a coupled current under the excitation of the third antenna radiator 103.

[0056] Among them, Figure 8 As shown, there is a first coupling path for direct coupling between the first antenna radiator 101 and the second antenna radiator 102 and a second coupling path for indirect coupling via the third antenna radiator 103. The first coupling path can be referred to in the attached Figure 8 The second coupling path can be found in the attached Figure 8The CD arc shown. In the following embodiments, the first coupling path is directly described as the first coupling path AB; the second coupling path is directly described as the second coupling path CD. It can be understood that the first coupling path AB represents the path of the current directly coupled from the first antenna radiator 101 to the second antenna radiator 102; or, represents the path of the current directly coupled from the second antenna radiator 102 to the first antenna radiator 101. The second coupling path CD represents the path of the current first coupled from the first antenna radiator 101 to the third antenna radiator 103, and then coupled from the third antenna radiator 103 to the second antenna radiator 102; or, represents the path of the current first coupled from the second antenna radiator 102 to the third antenna radiator 103, and then coupled from the third antenna radiator 103 to the first antenna radiator 101. In the following embodiments, the coupling path formed between the first antenna radiator 101 and the third antenna radiator 103 is described as the first sub-coupling path ab. The current path inside the third antenna radiator 103 is described as the second sub-coupling path ef. The coupling path formed between the second antenna radiator 102 and the third antenna radiator 103 is described as a third sub-coupling path cd. It can be understood that the second coupling path CD includes a first sub-coupling path ab, a second sub-coupling path ef and a third sub-coupling path cd.

[0057] The current phase of the second coupling path CD is opposite to the current phase of the first coupling path AB. In other words, the current phase of the second coupling path CD is 180° different from the current phase of the first coupling path AB. For example: when the current phase of the first coupling path AB is 90°, the current phase of the second coupling path CD is -90°; when the current phase of the first coupling path AB is 0°, the current phase of the second coupling path CD is 180°. In other words, at the same time, the current direction of the second coupling path CD is opposite to the current direction of the first coupling path AB. It can be understood that the current phase of the first sub-coupling path ab is opposite to the current phase of the first coupling path AB; the current phase of the second sub-coupling path ef is opposite to the current phase of the first coupling path AB; the current phase of the third sub-coupling path cd is opposite to the current phase of the first coupling path AB. In other words, the current phase of the first sub-coupling path ab is 180° different from the current phase of the first coupling path AB; the current phase of the second sub-coupling path ef is 180° different from the current phase of the first coupling path AB; the current phase of the third sub-coupling path cd is 180° different from the current phase of the first coupling path AB. In other words, at the same time, the current direction of the first sub-coupling path ab is opposite to the current direction of the first coupling path AB, the current direction of the second sub-coupling path ef is opposite to the current direction of the first coupling path AB, and the current direction of the third sub-coupling path cd is opposite to the current direction of the first coupling path AB.

[0058] In a possible application scenario, Fig. 9 As shown, Fig. 9 The arrow on the AB arc indicates the current direction of the first coupling path AB at a certain moment. The arrow on the CD arc indicates the current direction of the second coupling path CD at that moment. At that moment, the current direction of the first coupling path AB is opposite to the current direction of the second coupling path CD.

[0059] By making the current phase of the second coupling path CD opposite to the current phase of the first coupling path AB, at least part of the current on the second coupling path CD can be offset with at least part of the current on the first coupling path AB, that is, by introducing the third antenna radiator 103 coupled to both the first antenna radiator 101 and the second antenna radiator 102, a second coupling path CD can be formed between the first antenna radiator 101, the second antenna radiator 102 and the third antenna radiator 103, and the coupling energy on the second coupling path CD can be offset with the coupling energy on the first coupling path AB directly coupled between the first antenna radiator 101 and the second antenna radiator 102, thereby improving the isolation between the first antenna radiator 101 and the second antenna radiator 102. In other words, the third antenna radiator 103 in the present application can be used as a decoupling structure between the first antenna radiator 101 and the second antenna radiator 102.

[0060] The antenna assembly 10 provided in the present application includes a first antenna radiator 101, a second antenna radiator 102 and a third antenna radiator 103. The second antenna radiator 102 is directly coupled to the first antenna radiator 101 to form a first coupling path AB; the third antenna radiator 103 is coupled to the first antenna radiator 101, and the third antenna radiator 103 is also coupled to the second antenna radiator 102. Therefore, the second antenna radiator 102 is also coupled to the first antenna radiator 101 through the third antenna radiator 103. 2 and the first antenna radiator 101 through the third antenna radiator 103, and the path of the interval coupling is the second coupling path CD; by making the current phase of the second coupling path CD opposite to the current phase of the first coupling path AB, the coupling energy between the first antenna radiator 101 and the second antenna radiator 102 can be offset, so that the isolation between the second antenna radiator 102 and the first antenna radiator 101 can be improved, which is also beneficial to the high-frequency and multi-frequency development of the antenna assembly 10 and the layout of the antenna assembly 10 in the electronic device 100 with limited space.

[0061] Among them, when the structural dimension of the third antenna radiator 103 is a preset dimension, the current phase of the second coupling path CD is opposite to the current phase of the first coupling path AB. In other words, the current phase of the second coupling path CD can be adjusted by adjusting the structural dimension of the third antenna radiator 103, so as to achieve that the current phase of the second coupling path CD is opposite to the current phase of the first coupling path AB. The specific preset dimension value can be designed according to the isolation requirement between the first antenna radiator 101 and the second antenna radiator 102, the frequency band supported by the first antenna radiator 101, and the frequency band supported by the second antenna radiator 102. For example: the preset dimension can be less than 1 / 4 wavelength of the electromagnetic wave signal of the second coupling path CD; or, the preset dimension is 1 / 4 wavelength to 1 / 2 wavelength of the electromagnetic wave signal of the second coupling path CD; or, the preset dimension is 1 / 2 wavelength to 3 / 4 wavelength of the electromagnetic wave signal of the second coupling path CD, etc.

[0062] The difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB is less than or equal to the preset difference. Wherein, the preset difference may be zero or close to zero. In a possible embodiment, the preset difference may be zero, that is, the current amplitude of the second coupling path CD may be equal to the current amplitude of the first coupling path AB. In other words, at the same time, the current magnitude of the second coupling path CD may be the same as the current magnitude of the first coupling path AB. It can be understood that the current amplitude of the first sub-coupling path ab is equal to the current amplitude of the first coupling path AB, the current amplitude of the second sub-coupling path ef is equal to the current amplitude of the first coupling path AB, and the current amplitude of the third sub-coupling path cd is equal to the current amplitude of the first coupling path AB. In other words, at the same time, the current magnitude of the first sub-coupling path ab is the same as the current magnitude of the first coupling path AB, the current magnitude of the second sub-coupling path ef is the same as the current magnitude of the first coupling path AB, and the current magnitude of the third sub-coupling path cd is the same as the current magnitude of the first coupling path AB.

[0063] By making the difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB less than or equal to the preset difference, the current of the second coupling path CD and the current of the first coupling path AB can be offset as much as possible, thereby weakening the coupling between the first antenna radiator 101 and the second antenna radiator 102 and improving the isolation between the first antenna radiator 101 and the second antenna radiator 102. In a possible application scenario, the current amplitude of the second coupling path CD can be equal to the current amplitude of the first coupling path AB. At this time, the current of the second coupling path CD and the current of the first coupling path AB can be exactly completely offset, so as to maximize the isolation between the first antenna radiator 101 and the second antenna radiator 102.

[0064] When the spacing distance between the third antenna radiator 103 and the first antenna radiator 101 is the first preset distance and the spacing distance between the third antenna radiator 103 and the second antenna radiator 102 is the second preset distance, the difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB is less than or equal to the preset difference. In other words, the current amplitude of the second coupling path CD can be adjusted by adjusting the spacing distance between the third antenna radiator 103 and the first antenna radiator 101, so that the difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB is less than or equal to the preset difference; similarly, the current amplitude of the second coupling path CD can also be adjusted by adjusting the spacing distance between the third antenna radiator 103 and the second antenna radiator 102, so that the difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB is less than or equal to the preset difference.

[0065] like Fig.10 As shown, the spacing distance between the third antenna radiator 103 and the first antenna radiator 101 can be referred to in the attached Fig.10 The distance between the third antenna radiator 103 and the second antenna radiator 102 can be referred to in the attached Fig.10 L2 in. The spacing distance between the third antenna radiator 103 and the first antenna radiator 101, and the spacing distance between the third antenna radiator 103 and the second antenna radiator 102 can be designed according to the isolation requirements between the first antenna radiator 101 and the second antenna radiator 102, the frequency band supported by the first antenna radiator 101, and the frequency band supported by the second antenna radiator 102. In other words, the first preset distance and the second preset distance can be designed according to the isolation requirements between the first antenna radiator 101 and the second antenna radiator 102, the frequency band supported by the first antenna radiator 101, and the frequency band supported by the second antenna radiator 102. The first preset distance and the second preset distance may be the same or different. In a possible embodiment, the first preset distance is the same as the second preset distance. By reducing the first preset distance, the current amplitude of the second coupling path CD can be increased, so as to facilitate adjusting the current amplitude of the second coupling path CD to a difference between the current amplitude of the first coupling path AB and the current amplitude of the first coupling path AB that is less than or equal to the preset difference. By increasing the first preset distance, the current amplitude of the second coupling path CD can be reduced, so as to facilitate adjusting the current amplitude of the second coupling path CD to a difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB that is less than or equal to the preset difference.

[0066] Furthermore, if Fig.11As shown, the antenna assembly 10 also includes a radio frequency signal source 50 and a reference ground 60. Among them, the radio frequency signal source 50 may include a radio frequency chip, a radio frequency module, etc. The radio frequency signal source 50 may be arranged on the mainboard 40. Specifically, the manner in which the radio frequency signal source 50 is arranged on the mainboard 40 includes but is not limited to the radio frequency signal source 50 being directly formed on the mainboard 40; or, the radio frequency signal source 50 is fixedly connected to the mainboard 40 after being formed. The radio frequency signal source 50 can provide radio frequency current. The reference ground 60 is a point that provides a common reference potential in the electronic device 100. For example: the reference ground 60 may be a ground layer of the mainboard 40, a component electrically connected to the ground layer of the mainboard 40, a frame 20 that is not used as an antenna radiator, etc. In this application, the current obtained by the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 from the radio frequency signal source 50 are all described as radiation currents. The currents generated by the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 due to mutual coupling are all described as coupling currents, which will not be repeated later.

[0067] like Fig.12 As shown, the second antenna radiator 102 and the first antenna radiator 101 are arranged along a first direction. In the embodiment of the present application, the first direction is taken as an example of a horizontal direction. Fig.12The first antenna radiator 101 includes a first free end 110, a first feeding point 111 and a first grounding terminal 112 arranged in sequence. The first feeding point 111 is electrically connected to the RF signal source 50. The first feeding point 111 is used to obtain the radiation current from the RF signal source 50. The first feeding point 111 and the RF signal source 50 can be directly electrically connected or indirectly electrically connected. When the first feeding point 111 and the RF signal source 50 are indirectly electrically connected, the first feeding point 111 and the RF signal source 50 can be electrically connected through a conductive spring, a conductive column, a feeder, etc. The first grounding terminal 112 is electrically connected to the reference ground 60. The first grounding terminal 112 is used to form a current loop. The first grounding terminal 112 and the reference ground 60 can be directly electrically connected or indirectly electrically connected. When the first grounding terminal 112 and the reference ground 60 are indirectly electrically connected, the first grounding terminal 112 and the reference ground 60 can be electrically connected through a conductive spring, a conductive column, a feeder, etc. The first free end 110 is in an open circuit state. Specifically, the first free end 110 is disconnected or insulated from the frame 20. The second antenna radiator 102 includes a second ground terminal 120, a second feeding point 121, and a second free end 122 arranged in sequence. The second feeding point 121 is electrically connected to the RF signal source 50. The second feeding point 121 is used to obtain radiation current from the RF signal source 50. The second feeding point 121 and the RF signal source 50 can be directly electrically connected or indirectly electrically connected. When the second feeding point 121 and the RF signal source 50 are indirectly electrically connected, the second feeding point 121 and the RF signal source 50 can be electrically connected through a conductive spring, a conductive column, a feeder, etc. The second ground terminal 120 is electrically connected to the reference ground 60. The second ground terminal 120 is used to form a current loop. The second ground terminal 120 and the reference ground 60 can be directly electrically connected or indirectly electrically connected. When the second grounding terminal 120 is indirectly electrically connected to the reference ground 60, the second grounding terminal 120 and the reference ground 60 can be electrically connected through a conductive spring, a conductive column, a feeder, etc. The second free end 122 is in an open circuit state. Specifically, the second free end 122 and the frame 20 are disconnected or insulated.

[0068] In a possible embodiment, Fig.12As shown, the first antenna radiator 101 can extend along the first direction. The second antenna radiator 102 can extend along the first direction. The first free end 110, the first feeding point 111, the first grounding end 112, the second grounding end 120, the second feeding point 121 and the second free end 122 can be arranged in sequence along the first direction. A first coupling path AB is formed between the first feeding point 111 and the second feeding point 121. By arranging the first free end 110, the first feeding point 111, the first grounding end 112, the second grounding end 120, the second feeding point 121 and the second free end 122 in sequence along the first direction, that is, the first grounding end 112 of the first antenna radiator 101 and the second grounding end 120 of the second antenna radiator 102 are close to each other, and the first feeding point 111 of the first antenna radiator 101 and the second feeding point 121 of the second antenna radiator 102 are far away from each other, and the first free end 110 of the first antenna radiator 101 and the second free end 122 of the second antenna radiator 102 are far away from each other, so that the first free end 110 coupled from the first feeding point 111, the first free end 110 and the second grounding end 120 are close to each other. The current coupled to the second antenna radiator 102 is reduced, and the current coupled from the second feeding point 121 and the second free end 122 to the first antenna radiator 101 is reduced, which can weaken the energy intensity of the direct coupling between the first antenna radiator 101 and the second antenna radiator 102, that is, the first coupling path AB is extended by moving the first feeding point 111 and the second feeding point 121 away from each other to weaken the energy intensity of the first coupling path AB, and the first ground terminal 112 and the second ground terminal 120 are brought close to each other to directly weaken the energy intensity of the first coupling path AB, thereby ensuring the isolation between the first antenna radiator 101 and the second antenna radiator 102.

[0069] Of course, in other embodiments, such as Fig.13 As shown, the first free end 110 , the first feeding point 111 , the first grounding end 112 , the second free end 122 , the second feeding point 121 and the second grounding end 120 may be arranged in sequence.

[0070] Optional, such as Fig.14 As shown, the first ground terminal 112 overlaps with the second ground terminal 120. It can be understood that the first antenna radiator 101 and the second antenna radiator 102 share the same ground terminal. By making the first ground terminal 112 overlap with the second ground terminal 120, the number of electrical connectors between the first ground terminal 112 and the reference ground 60 and between the second ground terminal 120 and the reference ground 60 can be reduced, and the connection distance between the first antenna radiator 101 and the second antenna radiator 102 can be shortened, thereby improving the compactness of the antenna assembly 10 and facilitating the layout of the antenna assembly 10 in the electronic device 100 with limited space.

[0071] Part of the third antenna radiator 103 is arranged opposite to the first antenna radiator 101 along the second direction and spaced apart. Another part of the third antenna radiator 103 is arranged opposite to the second antenna radiator 102 along the second direction and spaced apart. The second direction intersects with the first direction. It can be understood that part of the third antenna radiator 103 is coupled with the first antenna radiator 101, and a first sub-coupling path ab is formed between part of the third antenna radiator 103 and the first antenna radiator 101. Another part of the third antenna radiator 103 is coupled with the second antenna radiator 102, and a third sub-coupling path cd is formed between another part of the third antenna radiator 103 and the first antenna radiator 101. In the following embodiments, the part of the third antenna radiator 103 coupled with the first antenna radiator 101 is described as the first sub-antenna radiator 135; the part of the third antenna radiator 103 coupled with the second antenna radiator 102 is described as the second sub-antenna radiator 136.

[0072] In this embodiment, the second antenna radiator 102 and the first antenna radiator 101 are arranged along the first direction, part of the third antenna radiator 103 is opposite to and spaced from the first antenna radiator 101 along the second direction, and another part of the third antenna radiator 103 is opposite to and spaced from the second antenna radiator 102 along the second direction, and the second direction intersects with the first direction. This is beneficial for simultaneously achieving coupling of the third antenna radiator 103 with the first antenna radiator 101 and coupling of the third antenna radiator 103 with the second antenna radiator 102, ensuring the reliability of coupling of the third antenna radiator 103 with the first antenna radiator 101 and coupling of the third antenna radiator 103 with the second antenna radiator 102, and is beneficial for improving the compactness of the layout among the first antenna radiator 101, the second antenna radiator 102 and the third antenna radiator 103.

[0073] In a possible embodiment, Fig.15 As shown, the second direction is orthogonal to the first direction. In this embodiment, the second direction is a vertical direction. Fig.15By making the second direction orthogonal to the first direction, part of the third antenna radiator 103 and the first antenna radiator 101 can be arranged opposite and spaced along the second direction, that is, the first sub-coupling path ab can be arranged along the second direction, so as to facilitate adjustment of the spacing distance between the third antenna radiator 103 and the first antenna radiator 101 along the second direction, and achieve the spacing distance between the third antenna radiator 103 and the first antenna radiator 101 to be the first preset distance, which is conducive to achieving that the difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB is less than or equal to the preset difference. Similarly, by making the second direction orthogonal to the first direction, it is possible to achieve that another part of the third antenna radiator 103 and the second antenna radiator 102 are arranged opposite to and spaced apart along the second direction, that is, the third sub-coupling path cd can be achieved along the second direction, thereby facilitating adjustment of the spacing distance between the third antenna radiator 103 and the second antenna radiator 102 along the second direction, and achieving the spacing distance between the third antenna radiator 103 and the second antenna radiator 102 to be the second preset distance, which is further conducive to achieving that the difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB is less than or equal to the preset difference.

[0074] In addition, the first antenna radiator 101 extends along the first direction, the second antenna radiator 102 extends along the first direction, the third antenna radiator 103 and the first antenna radiator 101 are arranged opposite to and spaced apart along the second direction, and the third antenna radiator 103 and the second antenna radiator 102 are arranged opposite to and spaced apart along the second direction, and the second direction is orthogonal to the first direction, which is more conducive to increasing the coupling area between the third antenna radiator 103 and the first antenna radiator 101, and between the third antenna radiator 103 and the second antenna radiator 102, and improving the reliability of the third antenna radiator 103 being coupled to the first antenna radiator 101 and the second antenna radiator 102 at the same time, and is conducive to making the spacing distance between the third antenna radiator 103 and the first antenna radiator 101 equal to the spacing distance between the third antenna radiator 103 and the second antenna radiator 102, so as to facilitate adjusting one of the first preset distance and the second preset distance to achieve that the difference between the current amplitude of the second coupling path CD and the current amplitude of the first coupling path AB is less than or equal to the preset difference. In addition, the second direction is orthogonal to the first direction, which is beneficial to improving the compactness of the layout among the first antenna radiator 101 , the second antenna radiator 102 and the third antenna radiator 103 .

[0075] like Fig.16As shown, the third antenna radiator 103 includes a first edge 130, a second edge 131, a third edge 132 and a fourth edge 133 connected end to end in sequence. The first edge 130 is arranged opposite to the third edge 132. The second edge 131 is arranged opposite to the fourth edge 133. It can be understood that the third antenna radiator 103 is a quadrilateral. In the following embodiments, the third antenna radiator 103 is a rectangle as an example. The first edge 130 and the third edge 132 of the third antenna radiator 103 both extend along the first direction. It can be understood that the extension direction of the first edge 130 and the extension direction of the third edge 132 of the third antenna radiator 103 can be the same as the extension direction of the first antenna radiator 101 and the extension direction of the second antenna radiator 102. The second edge 131 and the fourth edge 133 of the third antenna radiator 103 both extend along the second direction. The first edge 130 and the third edge 132 may be the long sides of the third antenna radiator 103, and the second edge 131 and the fourth edge 133 may be the short sides of the third antenna radiator 103; or, the first edge 130 and the third edge 132 may be the short sides of the third antenna radiator 103, and the second edge 131 and the fourth edge 133 may be the long sides of the third antenna radiator 103. In the embodiment of the present application, the size of the first edge 130 is the same as the size of the third edge 132. The size of the second edge 131 is the same as the size of the fourth edge 133.

[0076] By making the third antenna radiator 103 include a first edge 130, a second edge 131, a third edge 132 and a fourth edge 133 which are connected end to end in sequence, the first edge 130 and the third edge 132 of the third antenna radiator 103 extend along the first direction, and the second edge 131 and the fourth edge 133 extend along the second direction, which is conducive to realizing the second sub-coupling path ef along the first direction, thereby facilitating the adjustment of the structural dimensions of the third antenna radiator 103 along the first direction, and realizing the structural dimensions of the third antenna radiator 103 as a preset dimension, which is conducive to the current phase of the second coupling path CD being opposite to the current phase of the first coupling path AB.

[0077] In this embodiment, the structural dimensions of the third antenna radiator 103 include the dimensions of the third antenna radiator 103 along the first direction and the dimensions of the third antenna radiator 103 along the second direction. At this time, by adjusting the dimensions of the third antenna radiator 103 along the first direction, and / or adjusting the dimensions of the third antenna radiator 103 along the second direction, the current phase of the second coupling path CD can be opposite to the current phase of the first coupling path AB. Among them, when adjusting the dimensions of the third antenna radiator 103 along the first direction, the influence on the current phase of the second coupling path CD is greater, while when adjusting the dimensions of the third antenna radiator 103 along the second direction, the influence on the current phase of the second coupling path CD is smaller. In a possible implementation, the current phase of the second coupling path CD can be opposite to the current phase of the first coupling path AB only by designing the dimensions of the third antenna radiator 103 along the first direction.

[0078] Of course, in other embodiments, the extension direction of the first edge 130 and the extension direction of the third edge 132 may intersect with the first direction, and the extension direction of the second edge 131 and the extension direction of the fourth edge 133 may intersect with the first direction.

[0079] In a possible implementation, Fig.17 As shown, the size of the first edge 130 may be smaller than the size of the second edge 131. It can be understood that the first edge 130 and the third edge 132 are short sides of the third antenna radiator 103, and the second edge 131 and the fourth edge 133 are long sides of the third antenna radiator 103.

[0080] Please refer to Fig.18 and Fig.19 , the size of the second edge 131 and the size of the fourth edge 133 are both greater than or equal to 3 / 10 of the wavelength of the electromagnetic wave signal received and sent by the third antenna radiator 103, and less than or equal to 7 / 10 of the wavelength of the electromagnetic wave signal received and sent by the third antenna radiator. In a possible implementation, the size of the second edge 131 and the size of the fourth edge 133 can both be equal to 1 / 2 of the wavelength of the electromagnetic wave signal received and sent by the third antenna radiator 103. The size of the second edge 131 can refer to the attached Fig.18 The size of the fourth edge 133 can refer to the attached Fig.18 In the embodiment of the present application, the size of the second edge 131 is the same as the size of the fourth edge 133. Of course, in other embodiments, the size of the second edge 131 may be different from the size of the fourth edge 133.

[0081] In a possible embodiment, the third antenna radiator 103 can transmit and receive 2.4 GHz electromagnetic wave signals. At this time, the size of the second edge 131 and the size of the fourth edge 133 can be greater than or equal to 37.5 mm and less than or equal to 87.5 mm. For example, the size of the second edge 131 and the size of the fourth edge 133 can be 40 mm, 55 mm, 60 mm, 65 mm, 67 mm, etc. When considering the influence of the medium, environment, etc., the size of the second edge 131 and the size of the fourth edge 133 can be adjusted according to factors such as dielectric constant and environmental influence.

[0082] By making the size of the second edge 131 and the size of the fourth edge 133 greater than or equal to 3 / 10 of the wavelength of the electromagnetic wave signal received and transmitted by the third antenna radiator 103, and less than or equal to 7 / 10 of the wavelength of the electromagnetic wave signal received and transmitted by the third antenna radiator, the RF signal source 50 can excite a current flowing along the second direction on the third antenna radiator 103, which is beneficial for the current direction of the third antenna radiator 103 to be orthogonal to the current direction of the first antenna radiator 101 and the current direction of the second antenna radiator 102, thereby improving the isolation between the third antenna radiator 103 and the first antenna radiator 101, and improving the isolation between the third antenna radiator 103 and the second antenna radiator 102.

[0083] Please refer to Fig.19 and Fig. 20 , the first edge 130 of a part is located between the third edge 132 of a part and the first antenna radiator 101, the first edge 130 of another part is located between the third edge 132 of another part and the second antenna radiator 102, and the third antenna radiator 103 includes a third feeding point 134, and the third feeding point 134 is located at the third edge 132. Among them, the edge of the first sub-antenna radiator 135 includes the first edge 130 of a part, the second edge 131 and the third edge 132 of a part. The edge of the second sub-antenna radiator 136 includes the first edge 130 of another part, the fourth edge 133 and the third edge 132 of another part.

[0084] It can be understood that the third feeding point 134 is far away from the first antenna radiator 101 and the second antenna radiator 102. By locating the third feeding point 134 at the third edge 132, it is conducive to achieving that the current flow direction of the third antenna radiator 103 is orthogonal to the current flow direction of the first antenna radiator 101, and the current flow direction of the third antenna radiator 103 is orthogonal to the current flow direction of the second antenna radiator 102, which can reduce the interference between the third antenna radiator 103 and the first antenna radiator 101, improve the isolation between the third antenna radiator 103 and the first antenna radiator 101, and reduce the interference between the third antenna radiator 103 and the second antenna radiator 102, and improve the isolation between the third antenna radiator 103 and the second antenna radiator 102. In addition, the third feeding point 134 is located at the third edge 132, which can make the third feeding point 134 away from the first antenna radiator 101 and the second antenna radiator 102, thereby preventing the radiation current obtained by the third feeding point 134 from being directly coupled to the first antenna radiator 101 or the second antenna radiator 102, and can further improve the isolation between the third antenna radiator 103 and the first antenna radiator 101, and improve the isolation between the third antenna radiator 103 and the second antenna radiator 102.

[0085] Among them, the third feeding point 134 can be electrically connected to the RF signal source 50. The third feeding point 134 and the RF signal source 50 can be directly electrically connected or indirectly electrically connected. When the third feeding point 134 and the RF signal source 50 are indirectly electrically connected, the third feeding point 134 and the RF signal source 50 can be electrically connected through a conductive spring, a conductive column, a feeder, etc. In a possible application scenario, the RF signal source 50 can simultaneously excite the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 to radiate. In other words, the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 can receive the radiation current provided by the RF signal source 50, that is, the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 work simultaneously.

[0086] Since the third feeding point 134 can be electrically connected to the RF signal source 50, the RF signal source 50 simultaneously excites the first antenna radiator 101, the second antenna radiator 102 and the third antenna radiator 103 to radiate, so the first antenna radiator 101 and the second antenna radiator 102 can radiate with the help of the third antenna radiator 103, thereby widening the bandwidth of the first antenna radiator 101 and the second antenna radiator 102; the third antenna radiator 103 can also radiate with the help of the first antenna radiator 101 and the second antenna radiator 102, and can also widen the bandwidth of the third antenna radiator 103. In this way, the first antenna radiator 101, the second antenna radiator 102 and the third antenna radiator 103 can all obtain wider bandwidth performance than when working alone.

[0087] The current flow direction of the third antenna radiator 103 is orthogonal to the current flow direction of the first antenna radiator 101, and / or the current flow direction of the third antenna radiator 103 is orthogonal to the current flow direction of the second antenna radiator 102. In the embodiment of the present application, the current flow direction of the first antenna radiator 101 may be along the first direction. The current flow direction of the second antenna radiator 102 may be along the first direction. The current flow direction of the third antenna radiator 103 may be along the second direction. By making the current flow direction of the third antenna radiator 103 orthogonal to the current flow direction of the first antenna radiator 101, the isolation between the third antenna radiator 103 and the first antenna radiator 101 can be ensured without setting other decoupling structures. Similarly, by making the current flow direction of the third antenna radiator 103 orthogonal to the current flow direction of the second antenna radiator 102, the isolation between the third antenna radiator 103 and the second antenna radiator 102 can be ensured without setting other decoupling structures.

[0088] Furthermore, if Fig.21 As shown, the antenna assembly 10 also includes at least one capacitor 104. The capacitor 104 is electrically connected between the first ground terminal 112 and the reference ground 60. The present application does not specifically limit the number of capacitors 104. For example: the number of capacitors 104 can be one, two, three, etc. When the number of capacitors 104 is multiple, the multiple capacitors 104 can be connected in series or in parallel. In the following embodiments, one capacitor 104 is taken as an example. In this embodiment, since the first ground terminal 112 coincides with the second ground terminal 120, the capacitor 104 is electrically connected between the first ground terminal 112 and the reference ground 60, that is, the capacitor 104 is electrically connected between the second ground terminal 120 and the reference ground 60.

[0089] Due to the first antenna radiator 101 and the second antenna radiator 102 made of metal, and the matching circuit electrically connected between the first antenna radiator 101 and the RF signal source 50 and between the first antenna radiator 101 and the reference ground 60, and the matching circuit electrically connected between the second antenna radiator 102 and the RF signal source 50 and between the second antenna radiator 102 and the reference ground 60, the antenna component 10 is in an inductive state. By making the antenna component 10 also include at least one capacitor 104, the capacitor 104 is electrically connected between the first ground terminal 112 and the reference ground 60, which is equivalent to forming an LC filtering circuit, and the isolation between the first antenna radiator 101 and the second antenna radiator 102 can be further improved.

[0090] The operating frequency bands of the first antenna radiator 101 , the second antenna radiator 102 , and the third antenna radiator 103 at least partially overlap.

[0091] In a possible embodiment, the operating frequency bands of the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 all include 2 GHz to 2.5 GHz. Fig. 22As shown. The first antenna radiator 101 and the second antenna radiator 102 both extend along the first direction. The first free end 110, the first feeding point 111, the first grounding end 112, the second grounding end 120, the second feeding point 121 and the second free end 122 are arranged in sequence along the first direction. The first grounding end 112 overlaps with the second grounding end 120. The dimension L5 of the third antenna radiator 103 along the first direction is approximately 25mm to 35mm. The dimension L6 of the third antenna radiator 103 along the second direction is approximately 35mm to 45mm. The dimension L5 of the third antenna radiator 103 along the first direction is slightly smaller than the dimension L6 of the third antenna radiator 103 along the second direction. The spacing distance L1 between the third antenna radiator 103 and the first antenna radiator 101 is approximately 0.5mm to 2mm. The spacing distance L2 between the third antenna radiator 103 and the second antenna radiator 102 is approximately 0.5mm to 2mm. The spacing distance between the third antenna radiator 103 and the first antenna radiator 101 is the same as the spacing distance between the third antenna radiator 103 and the second antenna radiator 102. The third feeding point 134 is located at the third edge 132 of the third antenna radiator 103. The decoupling principle of the antenna component 10 is as follows: there are two coupling paths between the first antenna radiator 101 and the second antenna radiator 102, namely the first coupling path AB and the second coupling path CD. Among them, the first coupling path AB path includes the electric field and magnetic field coupling when the third antenna radiator 103 is not added. The second coupling path CD path is a coupling path in which the first antenna radiator 101 is first coupled to the third antenna radiator 103 after the third antenna radiator 103 is introduced, and then coupled to the second antenna radiator 102 through the third antenna radiator 103. The current amplitude and phase of the second coupling path CD can be adjusted by adjusting the spacing distance L1 between the third antenna radiator 103 and the first antenna radiator 101, the spacing distance L2 between the third antenna radiator 103 and the second antenna radiator 102, and the structural size (L5 and / or L6) of the third antenna radiator 103. As a result, the current amplitude of the first coupling path AB is equivalent to the current amplitude of the second coupling path CD, and the current phase of the first coupling path AB is opposite to the current phase of the second coupling path CD. In this way, the coupling between the first antenna radiator 101 and the second antenna radiator 102 will offset each other through the first coupling path AB and the second coupling path CD, thereby improving the isolation between the first antenna radiator 101 and the second antenna radiator 102. In addition, the current on the first antenna radiator 101 is distributed in the horizontal direction (first direction) (the current distribution direction on the second antenna radiator 102 is the same as the current distribution direction on the first antenna radiator 101), and the current on the third antenna radiator 103 is distributed in the vertical direction (second direction). The current distribution direction of the first antenna radiator 101 , the current distribution direction of the second antenna radiator 102 , and the current distribution direction of the third antenna radiator 103 are perpendicular.Therefore, there is good isolation between the first antenna radiator 101 and the third antenna radiator 103 , and between the second antenna radiator 102 and the third antenna radiator 103 .

[0092] like Fig.23 As shown, Fig.23 for Fig. 22 The S-parameter curves of the first antenna radiator 101 , the second antenna radiator 102 and the third antenna radiator 103 of the antenna assembly 10 when working simultaneously are shown. Fig.23 In the figure, curve 1 represents the return loss curve of the first antenna radiator 101. Curve 2 represents the return loss curve of the second antenna radiator 102. Curve 3 represents the return loss curve of the third antenna radiator 103. It can be seen from curves 1, 2 and 3 that the operating frequency bands of the first antenna radiator 101, the second antenna radiator 102 and the third antenna radiator 103 all include 2 GHz to 2.5 GHz. Curve 4 represents the isolation curve between the first antenna radiator 101 and the second antenna radiator 102. Curve 5 represents the isolation curve between the second antenna radiator 102 and the first antenna radiator 101. Curve 6 represents the isolation curve between the first antenna radiator 101 and the third antenna radiator 103. Curve 7 represents the isolation curve between the third antenna radiator 103 and the first antenna radiator 101. Curve 8 represents the isolation curve between the second antenna radiator 102 and the third antenna radiator 103. Curve 9 represents the isolation curve between the third antenna radiator 103 and the second antenna radiator 102. From curves 4 and 5, it can be seen that since the coupling currents of the first coupling path AB and the second coupling path CD cancel each other, there is an obvious concave point on the isolation curve between the first antenna radiator 101 and the second antenna radiator 102, that is, the isolation between the first antenna radiator 101 and the second antenna radiator 102 is significantly improved. From curves 6, 7, 8 and 9, it can be seen that the isolation between the first antenna radiator 101 and the third antenna radiator 103, and the isolation between the second antenna radiator 102 and the third antenna radiator 103 are also good.

[0093] like Fig.24 As shown, Fig.24 for Fig. 22 The S parameter curves of the first antenna radiator 101 and the second antenna radiator 102 of the antenna assembly 10 are shown when the first antenna radiator 101 and the second antenna radiator 102 are working without the third antenna radiator 103 . Fig.24In FIG. 1 , curve 10 represents the return loss curve of the first antenna radiator 101 when the third antenna radiator 103 is not provided. Curve 11 represents the return loss curve of the second antenna radiator 102 when the third antenna radiator 103 is not provided. Curve 12 represents the isolation curve between the first antenna radiator 101 and the second antenna radiator 102 when the third antenna radiator 103 is not provided. Fig.23 Middle curve 4 and Fig.24 It can be seen from the middle curve 12 that when the third antenna radiator 103 is not provided, the isolation curve between the first antenna radiator 101 and the second antenna radiator 102 is obviously convex, and the isolation between the first antenna radiator 101 and the second antenna radiator 102 is poor. Fig.23 Middle curve 1 and Fig.24 middle curve 10, and Fig.23 Middle curve 2 and Fig.24 It can be seen from the middle curve 11 that when the third antenna radiator 103 is not provided, the bandwidth of the first antenna radiator 101 and the bandwidth of the second antenna radiator 102 are also relatively narrow.

[0094] like Fig.25 As shown, Fig.25 is an S parameter curve when the third antenna radiator 103 works alone. Fig.25 In FIG. 1 , curve 13 represents the return loss curve of the third antenna radiator 103. Fig.23 Middle curve 3 and Fig.25 It can be seen from the middle curve 13 that the bandwidth of the third antenna radiator 103 is relatively narrow when working alone.

[0095] In short, combined Figure 23 to Figure 25 It can be seen that the antenna assembly 10 has better isolation and working bandwidth when the first antenna radiator 101, the second antenna radiator 102 and the third antenna radiator 103 work at the same time, compared with when the first antenna radiator 101 and the second antenna radiator 102 work but the third antenna radiator 103 does not exist or the third antenna radiator 103 works alone.

[0096] The features mentioned in the description, claims and drawings can be combined with each other as desired as long as they are meaningful within the scope of the present application. The advantages and features described for the antenna assembly 10 apply to the electronic device 100 in a corresponding manner.

[0097] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application, and these improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. An antenna assembly, characterized in that: include: a first antenna radiator; A second antenna radiator, connected to one end of the first antenna radiator, the second antenna radiator is coupled to the first antenna radiator; and a third antenna radiator, part of the third antenna radiator being opposite to and spaced from the first antenna radiator, and the third antenna radiator being coupled to the first antenna radiator, and another part of the third antenna radiator being opposite to and spaced from the second antenna radiator, and the third antenna radiator being coupled to the second antenna radiator; There is a first coupling path for direct coupling and a second coupling path for indirect coupling via the third antenna radiator between the first antenna radiator and the second antenna radiator, and a current phase of the second coupling path is opposite to a current phase of the first coupling path.

2. The antenna assembly according to claim 1, characterized in that: When the structural size of the third antenna radiator is a preset size, the current phase of the second coupling path is opposite to the current phase of the first coupling path.

3. The antenna assembly according to claim 1, characterized in that: A difference between a current amplitude of the second coupling path and a current amplitude of the first coupling path is less than or equal to a preset difference.

4. The antenna assembly according to claim 3, characterized in that: When the spacing distance between the third antenna radiator and the first antenna radiator is a first preset distance and the spacing distance between the third antenna radiator and the second antenna radiator is a second preset distance, the difference between the current amplitude of the second coupling path and the current amplitude of the first coupling path is less than or equal to the preset difference.

5. The antenna assembly according to any one of claims 1 to 4, characterized in that: The antenna assembly also includes a radio frequency signal source and a reference ground, the second antenna radiator is arranged along the first direction with the first antenna radiator, the first antenna radiator includes a first free end, a first feeding point and a first grounding end arranged in sequence, the first feeding point is electrically connected to the radio frequency signal source, and the first grounding end is electrically connected to the reference ground, the second antenna radiator includes a second grounding end, a second feeding point and a second free end arranged in sequence, the second feeding point is electrically connected to the radio frequency signal source, and the second grounding end is electrically connected to the reference ground; the third antenna radiator of the part is opposite to the first antenna radiator and is spaced apart along the second direction, and the third antenna radiator of the other part is opposite to the second antenna radiator and is spaced apart along the second direction; wherein the second direction intersects with the first direction.

6. The antenna assembly according to claim 5, characterized in that: The first antenna radiator extends along the first direction, the second antenna radiator extends along the first direction, and the first ground end coincides with the second ground end.

7. The antenna assembly according to claim 5, characterized in that: The second direction is orthogonal to the first direction.

8. The antenna assembly according to claim 5, characterized in that: The third antenna radiator includes a first edge, a second edge, a third edge and a fourth edge connected end to end in sequence, the first edge and the third edge are arranged opposite to each other and both extend along the first direction, and the second edge and the fourth edge are arranged opposite to each other and both extend along the second direction.

9. The antenna assembly according to claim 8, characterized in that: The size of the second edge and the size of the fourth edge are both greater than or equal to 3 / 10 of the wavelength of the electromagnetic wave signal received and sent by the third antenna radiator, and less than or equal to 7 / 10 of the wavelength of the electromagnetic wave signal received and sent by the third antenna radiator.

10. The antenna assembly according to claim 8, characterized in that: The first edge of a portion is located between the third edge of a portion and the first antenna radiator, the first edge of another portion is located between the third edge of another portion and the second antenna radiator, and the third antenna radiator includes a third feeding point, and the third feeding point is located at the third edge.

11. The antenna assembly according to claim 10, characterized in that: The third feeding point is electrically connected to the radio frequency signal source, and the radio frequency signal source can simultaneously excite the first antenna radiator, the second antenna radiator and the third antenna radiator to radiate.

12. The antenna assembly according to any one of claims 1 to 4, characterized in that: The current flow direction of the third antenna radiator is orthogonal to the current flow direction of the first antenna radiator, and / or the current flow direction of the third antenna radiator is orthogonal to the current flow direction of the second antenna radiator.

13. The antenna assembly according to claim 6, characterized in that: The antenna assembly further includes at least one capacitor electrically connected between the first ground terminal and the reference ground.

14. The antenna assembly according to any one of claims 1 to 4, characterized in that: An operating frequency band of the first antenna radiator, an operating frequency band of the second antenna radiator, and an operating frequency band of the third antenna radiator at least partially overlap.

15. An electronic device, characterized in that: It comprises a frame and the antenna assembly according to any one of claims 1 to 14, wherein the first antenna radiator and the second antenna radiator are arranged on the frame, and the third antenna radiator is located inside the frame.

16. The electronic device according to claim 15, characterized in that: The first antenna radiator and the second antenna radiator are frame-type antenna radiators or embedded antenna radiators, and the third antenna radiator is one of an FPC antenna radiator, an LDS antenna radiator, and a PCB antenna radiator.

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