Antenna components and electronic devices

Abstract

This application provides an antenna assembly and electronic device. The antenna assembly includes 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 to the first antenna radiator. A portion of the third antenna radiator is positioned opposite and spaced apart from the first antenna radiator, and coupled to the first antenna radiator; another portion of the third antenna radiator is positioned opposite and spaced apart from the second antenna radiator, and coupled to the second antenna radiator. The first antenna radiator and the second antenna radiator have a first coupling path that is directly coupled and a second coupling path that is indirectly coupled through the third antenna radiator, the current phase of the second coupling path being opposite to the current phase of the first coupling path. The antenna assembly and electronic device provided in this application have good isolation.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, specifically to an antenna assembly and an electronic device. Background Technology

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

[0003] This application provides an antenna assembly and electronic device that can improve isolation.

[0004] On one hand, this application provides an antenna assembly, including:

[0005] 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] The third antenna radiator, in part, is opposite to and spaced apart from the first antenna radiator, and is coupled to the first antenna radiator; the other part of the third antenna radiator is opposite to and spaced apart from the second antenna radiator, and is coupled to the second antenna radiator.

[0008] The first antenna radiator and the second antenna radiator have a first coupling path that is directly coupled and a second coupling path that is indirectly coupled through the third antenna radiator, wherein the current phase of the second coupling path is opposite to the current phase of the first coupling path.

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

[0010] The antenna assembly provided in this 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 also to the second antenna radiator. Therefore, the second antenna radiator and the first antenna radiator are also coupled intermittently through the third antenna radiator. The intermittent coupling path between the second antenna radiator and the first antenna radiator 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 mutually canceled, thereby improving the isolation between the second antenna radiator and the first antenna radiator. This is also beneficial for the high-frequency and multi-frequency development of the antenna assembly and the layout of the antenna assembly in space-constrained electronic devices. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

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

[0013] Figure 2 for Figure 1 The electronic device shown is a schematic diagram of a planar structure including a frame and an antenna assembly.

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

[0015] Figure 4 for Figure 2 A schematic diagram of the planar structure of the electronic device shown, in which the third antenna radiator is located on the back cover.

[0016] Figure 5 for Figure 2 A schematic diagram of the planar structure of the electronic device shown, in which the third antenna radiator is located on the motherboard.

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

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

[0019] Figure 8 for Figure 6The diagram shows a first coupling path with direct coupling between the first antenna radiator and the second antenna radiator of the antenna assembly shown, and a second coupling path with indirect coupling through the third antenna radiator.

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

[0021] Figure 10 for Figure 8 The diagram shows the antenna assembly where the distance between the third antenna radiator and the first antenna radiator is a first preset distance, and the distance between the third antenna radiator and the first antenna radiator is a second preset distance.

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

[0023] Figure 12 for Figure 11 The first antenna radiator of the antenna assembly shown includes a first free end, a first feed point and a first ground end, and the second antenna radiator includes a second ground end, a second feed point and a second free end.

[0024] Figure 13 for Figure 12 A schematic diagram of the planar structure of the antenna assembly shown, in which the first free end, first feed point, first ground end, second free end, second feed point, and second ground end are arranged in sequence;

[0025] Figure 14 for Figure 12 A schematic diagram of the planar structure of the antenna assembly shown, in which the first ground terminal and the second ground terminal coincide.

[0026] Figure 15 for Figure 14 The diagram shows a planar structure in which the third antenna radiator of the antenna assembly is positioned relative to and spaced apart from the first antenna radiator and the second antenna radiator along the second direction.

[0027] Figure 16 for Figure 15 The diagram shows a planar structure of the third antenna radiator of the antenna assembly, including a first edge, a second edge, a third edge, and a fourth edge.

[0028] Figure 17 for Figure 16 The diagram shows a planar structure of an antenna assembly where the size of the first edge is smaller than the size of the second edge.

[0029] Figure 18 for Figure 16 The diagram shows a planar structure of the antenna assembly whose dimensions of the second and fourth edges are greater than or equal to half the wavelength of the electromagnetic wave signal transmitted and received by the third antenna radiator.

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

[0031] Figure 20 for Figure 18 The third antenna radiator of the antenna assembly shown is a schematic diagram of a planar structure including a third feed point located at the third edge.

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

[0033] Figure 22 Another structural schematic diagram of the antenna assembly provided in the embodiments of this application;

[0034] Figure 23 for Figure 22 The S-parameter curves of the first antenna radiator, the second antenna radiator, and the third antenna radiator of the antenna assembly shown are in operation simultaneously.

[0035] Figure 24 for Figure 22 The S-parameter curves of the first and second antenna radiators of the antenna assembly shown are displayed when the first and second antenna radiators are working and the third antenna radiator is not provided.

[0036] Figure 25 for Figure 22 The S-parameter curve of the third antenna radiator of the antenna assembly shown is displayed when it operates alone.

[0037] Explanation of reference numerals in the attached figures:

[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; rear cover 30; motherboard 40; first coupling path AB; second coupling path CD; first sub-coupling path ab; second sub-coupling path ef; third sub-coupling path cd; radio frequency signal source 50; reference ground 60; first free end 110; first feed point 111; first ground end 112; second ground end 120; second feed 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 feed point 134; capacitor 104. Detailed Implementation

[0039] The technical solutions provided in this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort are within the protection scope of this application.

[0040] In this application, the terms "embodiment" or "implementation" mean that a specific feature, structure, or characteristic described in connection with an embodiment or implementation can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0041] The terms “first,” “second,” etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, rather than to describe a particular order; furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] like Figure 1 As shown, Figure 1 This is a schematic diagram of the external structure of the electronic device 100 provided in this application embodiment. The electronic device 100 can be a mobile phone, tablet computer, watch, drone, robot, or other device with wireless communication capabilities. This application embodiment uses 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 2A schematic diagram of a planar structure of the electronic device 100 provided in this application embodiment, including a frame 20 and an antenna assembly 10. Figure 3 The electronic device 100 provided in the embodiments of this application includes another planar structure diagram of a frame 20 and an antenna assembly 10.

[0044] The border 20 can be either a conductive or non-conductive border. When the border 20 is conductive, its material can be metal, alloy, etc. When the border 20 is non-conductive, its material can be plastic, glass, ceramic, etc. In this embodiment, the border 20 is generally rectangular. The border 20 includes a first sub-border 201, a second sub-border 202, a third sub-border 203, and a fourth sub-border 204 connected end-to-end. In this embodiment, the first sub-border 201 can be understood as the top border. The second sub-border 202 can be understood as the left border. The third sub-border 203 can be understood as the right border. The fourth sub-border 204 can be understood as the bottom border. Of course, in other embodiments, the border 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 this embodiment, the first antenna radiator 101 and the second antenna radiator 102 are disposed 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 disposed 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 one possible embodiment, such as Figure 2As shown, both the first antenna radiator 101 and the second antenna radiator 102 are frame-type antenna radiators. In other words, the first antenna radiator 101 reuses a portion of the first sub-frame 201. The second antenna radiator 102 reuses a portion of the first sub-frame 201. In this embodiment, the first sub-frame 201 must be a conductive frame 20. By making the first antenna radiator 101 and the second antenna radiator 102 frame-type antenna radiators, it is beneficial for the first antenna radiator 101 and the second antenna radiator 102 to radiate directly towards the outside of the electronic device 100, and it can avoid the loss of the radiated signal of the first antenna radiator 101 and the second antenna radiator 102 when passing through the frame 20, thereby improving the communication performance of the electronic device 100. In addition, the reuse of a portion of the frame 20 by the first antenna radiator 101 and the second antenna radiator 102 can reduce the internal space occupied by the first antenna radiator 101 and the second antenna radiator 102 in the electronic device 100, which facilitates the arrangement of other internal components in the electronic device 100.

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

[0049] In the following embodiments, unless otherwise specified, the first antenna radiator 101 and the second antenna radiator 102 are both frame 20 antenna radiators.

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

[0051] like Figure 6 As shown, Figure 6 This is a schematic diagram of the structure of an antenna assembly 10 provided in an embodiment of this application. 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, or a transceiver antenna radiator. In this embodiment, a transceiver antenna radiator is used as an example. Understandably, the first antenna radiator 101 is capable of receiving and transmitting electromagnetic wave signals.

[0053] The second antenna radiator 102 can be one of a receiving antenna radiator, a transmitting antenna radiator, or a transceiver antenna radiator. This embodiment uses a transceiver antenna radiator as an example. Understandably, 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. The second antenna radiator 102 can be directly connected to one end of the first antenna radiator 101, or indirectly connected to one end of the first antenna radiator 101. In this embodiment, 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. Understandably, the current in the first antenna radiator 101 can be coupled to the second antenna radiator 102. The current in 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 one possible application scenario, such as Figure 7 As shown, Figure 7 The solid arrow indicates the radiated current of the first antenna radiator 101. The dashed 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 radiated current of the first antenna radiator 101 itself.

[0055] The third antenna radiator 103 can be one of a receiving antenna radiator, a transmitting antenna radiator, or a transceiver antenna radiator. In this embodiment, a transceiver antenna radiator is used as an example. Understandably, the third antenna radiator 103 can receive and transmit electromagnetic wave signals. A portion of the third antenna radiator 103 is positioned opposite and spaced apart from the first antenna radiator 101, and the third antenna radiator 103 is coupled to the first antenna radiator 101. Understandably, the current in the first antenna radiator 101 can be coupled to the third antenna radiator 103. The current in 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 portion of the third antenna radiator 103 is positioned opposite and spaced apart from the second antenna radiator 102, and the third antenna radiator 103 is coupled to the second antenna radiator 102. Understandably, the current in the second antenna radiator 102 can couple to the third antenna radiator 103. The current in the third antenna radiator 103 can couple to the second antenna radiator 102. In other words, the third antenna radiator 103 can generate a coupling current under the excitation of the second antenna radiator 102. The second antenna radiator 102 can generate a coupling current under the excitation of the third antenna radiator 103.

[0056] Among them, such as Figure 8 As shown, the first antenna radiator 101 and the second antenna radiator 102 have a first coupling path of direct coupling and a second coupling path of indirect coupling through the third antenna radiator 103. The first coupling path can be referred to in the appendix. Figure 8 The AB arc is shown. The second coupling path can be found in the appendix. Figure 8The CD arc is 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 current directly coupled from the first antenna radiator 101 to the second antenna radiator 102; or, it represents the path of current directly coupled from the second antenna radiator 102 to the first antenna radiator 101. The second coupling path CD represents the path of current first coupled from the first antenna radiator 101 to the third antenna radiator 103, and then from the third antenna radiator 103 to the second antenna radiator 102; or, it represents the path of current first coupled from the second antenna radiator 102 to the third antenna radiator 103, and then 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 the first sub-coupling path ab, the second sub-coupling path ef, and the 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 differs from the current phase of the first coupling path AB by 180°. 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°. That is to say, 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; and 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-coupled path ab is 180° out of phase with the current phase of the first coupled path AB; the current phase of the second sub-coupled path ef is 180° out of phase with the current phase of the first coupled path AB; and the current phase of the third sub-coupled path cd is 180° out of phase with the current phase of the first coupled path AB. That is to say, at the same time, the current direction of the first sub-coupled path ab is opposite to the current direction of the first coupled path AB, the current direction of the second sub-coupled path ef is opposite to the current direction of the first coupled path AB, and the current direction of the third sub-coupled path cd is opposite to the current direction of the first coupled path AB.

[0058] In one possible application scenario, such as Figure 9 As shown, Figure 9 The arrow on arc AB indicates the current direction of the first coupling path AB at a certain moment. The arrow on arc CD 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 a portion of the current on the second coupling path CD can cancel out at least a portion of the current on the first coupling path AB. That is, by introducing a 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. The coupling energy on the second coupling path CD can cancel out the coupling energy on the first coupling path AB, which directly couples 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 this application can serve as a decoupling structure between the first antenna radiator 101 and the second antenna radiator 102.

[0060] The antenna assembly 10 provided in this 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, forming a first coupling path AB. The third antenna radiator 103 is coupled to the first antenna radiator 101, and also to the second antenna radiator 102. Therefore, the second antenna radiator 102 and the first antenna radiator 101 are also coupled intermittently through the third antenna radiator 103. The path through which the first antenna radiator 101 is coupled to the second antenna radiator 102 via the third antenna radiator 103 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 mutually canceled, thereby improving the isolation between the second antenna radiator 102 and the first antenna radiator 101. This 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 space-limited electronic device 100.

[0061] When the structural dimensions of the third antenna radiator 103 are set to a preset size, 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 changing the structural dimensions of the third antenna radiator 103, so 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 size value 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. For example, the preset size can be less than 1 / 4 wavelength of the electromagnetic wave signal of the second coupling path CD; or, the preset size can be 1 / 4 to 1 / 2 wavelength of the electromagnetic wave signal of the second coupling path CD; or, the preset size can be 1 / 2 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 a preset difference. This preset difference can be zero or close to zero. In one possible embodiment, the preset difference can be zero, meaning the current amplitude of the second coupling path CD can 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 can be the same as the current magnitude of the first coupling path AB. It is 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 ensuring 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 a preset difference, the currents in the second coupling path CD and the first coupling path AB can cancel each other out as much as possible. This weakens the coupling between the first antenna radiator 101 and the second antenna radiator 102, thereby improving the isolation between them. In one 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. In this case, the currents in the second coupling path CD and the first coupling path AB can completely cancel each other out, maximizing the isolation between the first antenna radiator 101 and the second antenna radiator 102.

[0064] Wherein, when the spacing between the third antenna radiator 103 and the first antenna radiator 101 is a first preset distance, and the spacing between the third antenna radiator 103 and the second antenna radiator 102 is a 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, by adjusting the spacing between the third antenna radiator 103 and the first antenna radiator 101, the current amplitude of the second coupling path CD can be adjusted to ensure 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 adjusting the spacing between the third antenna radiator 103 and the second antenna radiator 102, the current amplitude of the second coupling path CD can also be adjusted to ensure 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 Figure 10 As shown, the distance between the third antenna radiator 103 and the first antenna radiator 101 can be referred to the attached figure. Figure 10 L1; the spacing between the third antenna radiator 103 and the second antenna radiator 102 can be referred to in the appendix. Figure 10 L2 in the diagram. The spacing between the third antenna radiator 103 and the first antenna radiator 101, and the spacing between the third antenna radiator 103 and the second antenna radiator 102, can be designed based on the isolation requirements between the first antenna radiator 101 and the second antenna radiator 102, the frequency bands supported by the first antenna radiator 101, and the frequency bands supported by the second antenna radiator 102. In other words, the first preset distance and the second preset distance can be designed based on the isolation requirements between the first antenna radiator 101 and the second antenna radiator 102, the frequency bands supported by the first antenna radiator 101, and the frequency bands supported by the second antenna radiator 102. The first preset distance and the second preset distance can be the same or different. In one possible embodiment, the first preset distance and the second preset distance are the same. By reducing the first preset distance, the current amplitude of the second coupling path CD can be increased, which is beneficial to adjusting the current amplitude of the second coupling path CD to a value less than or equal to the current amplitude of the first coupling path AB. Increasing the first preset distance can reduce the current amplitude of the second coupling path CD, which helps to adjust the current amplitude of the second coupling path CD to a value less than or equal to the current amplitude of the first coupling path AB.

[0066] Furthermore, such as Figure 11As shown, the antenna assembly 10 also includes a radio frequency (RF) signal source 50 and a reference ground 60. The RF signal source 50 may include an RF chip, an RF module, etc. The RF signal source 50 may be mounted on the motherboard 40. Specifically, the RF signal source 50 may be mounted on the motherboard 40 in ways including, but not limited to, the RF signal source 50 being directly formed on the motherboard 40; or, the RF signal source 50 being formed and fixedly connected to the motherboard 40. The RF signal source 50 can provide RF current. The reference ground 60 is a point in the electronic device 100 that provides a common reference potential. For example, the reference ground 60 may be the ground plane of the motherboard 40, a component electrically connected to the ground plane of the motherboard 40, or a frame 20 that is not used as an antenna radiator. In this application, the currents obtained from the RF signal source 50 by the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 are all described as radiated currents. The currents generated by the mutual coupling of the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 are all described as coupling currents, and will not be further elaborated upon hereafter.

[0067] like Figure 12 As shown, the second antenna radiator 102 and the first antenna radiator 101 are arranged along a first direction. In this embodiment, the first direction is exemplified by a horizontal direction. The first direction can be referred to in the attached diagram. Figure 12The first antenna radiator 101 includes a first free end 110, a first feed point 111, and a first ground end 112 arranged sequentially. The first feed point 111 is electrically connected to the radio frequency signal source 50. The first feed point 111 is used to obtain radiated current from the radio frequency signal source 50. The first feed point 111 and the radio frequency signal source 50 can be directly or indirectly electrically connected. When the first feed point 111 and the radio frequency signal source 50 are indirectly electrically connected, they can be electrically connected through conductive springs, conductive posts, feed lines, etc. The first ground end 112 is electrically connected to the reference ground 60. The first ground end 112 is used to form a current loop. The first ground end 112 and the reference ground 60 can be directly or indirectly electrically connected. When the first ground end 112 and the reference ground 60 are indirectly electrically connected, they can be electrically connected through conductive springs, conductive posts, feed lines, 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 end 120, a second feed point 121, and a second free end 122 arranged sequentially. The second feed point 121 is electrically connected to the radio frequency signal source 50. The second feed point 121 is used to obtain radiated current from the radio frequency signal source 50. The second feed point 121 and the radio frequency signal source 50 can be directly or indirectly electrically connected. When the second feed point 121 and the radio frequency signal source 50 are indirectly electrically connected, the second feed point 121 and the radio frequency signal source 50 can be electrically connected through conductive springs, conductive posts, feed lines, etc. The second ground end 120 is electrically connected to the reference ground 60. The second ground end 120 is used to form a current loop. The second ground end 120 and the reference ground 60 can be directly or indirectly electrically connected. When the second grounding terminal 120 is electrically connected to the reference ground 60, the connection can be made via a conductive spring, conductive post, feeder, etc. The second free terminal 122 is in an open-circuit state. Specifically, the second free terminal 122 is disconnected or insulated from the frame 20.

[0068] In one possible embodiment, such as Figure 12As shown, the first antenna radiator 101 can extend along a first direction. The second antenna radiator 102 can extend along the first direction. The first free end 110, the first feed point 111, the first ground end 112, the second ground end 120, the second feed point 121, and the second free end 122 can be arranged sequentially along the first direction. A first coupling path AB is formed between the first feed point 111 and the second feed point 121. By arranging the first free end 110, the first feed point 111, the first ground end 112, the second ground end 120, the second feed point 121, and the second free end 122 sequentially along a first direction, that is, the first ground end 112 of the first antenna radiator 101 and the second ground end 120 of the second antenna radiator 102 are close to each other, while the first feed point 111 of the first antenna radiator 101 and the second feed point 121 of the second antenna radiator 102 are far apart 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 apart from each other, so that the coupling from the first feed point 111 and the first free end 110 is achieved... The reduced current flowing to the second antenna radiator 102 and the reduced current coupling from the second feed point 121 and the second free end 122 to the first antenna radiator 101 can weaken the energy intensity of the direct coupling between the first antenna radiator 101 and the second antenna radiator 102. Specifically, the energy intensity of the first coupling path AB is weakened by extending the distance between the first feed point 111 and the second feed point 121, and the energy intensity of the first coupling path AB is weakened by bringing the first ground end 112 and the second ground end 120 closer together. This ensures the isolation between the first antenna radiator 101 and the second antenna radiator 102.

[0069] Of course, in other embodiments, such as Figure 13 As shown, the first free end 110, the first feed point 111, the first ground end 112, the second free end 122, the second feed point 121, and the second ground end 120 can be arranged in sequence.

[0070] Optional, such as Figure 14 As shown, the first grounding terminal 112 coincides with the second grounding terminal 120. It is understood that the first antenna radiator 101 and the second antenna radiator 102 share the same grounding terminal. By aligning the first grounding terminal 112 with the second grounding terminal 120, the number of electrical connections between the first grounding terminal 112 and the reference ground 60, and between the second grounding terminal 120 and the reference ground 60, can be reduced. Furthermore, the connection distance between the first antenna radiator 101 and the second antenna radiator 102 can be shortened, improving the structural compactness of the antenna assembly 10 and facilitating its placement in a space-constrained electronic device 100.

[0071] A portion of the third antenna radiator 103 is positioned opposite and spaced from the first antenna radiator 101 along a second direction. Another portion of the third antenna radiator 103 is positioned opposite and spaced from the second antenna radiator 102 along the second direction. The second direction intersects the first direction. It is understood that a portion of the third antenna radiator 103 is coupled to the first antenna radiator 101, forming a first sub-coupling path ab between the portion of the third antenna radiator 103 and the first antenna radiator 101. Another portion of the third antenna radiator 103 is coupled to the second antenna radiator 102, forming a third sub-coupling path cd between the other portion of the third antenna radiator 103 and the first antenna radiator 101. In the following embodiments, the portion of the third antenna radiator 103 coupled to the first antenna radiator 101 is described as a first sub-antenna radiator 135; and the portion of the third antenna radiator 103 coupled to the second antenna radiator 102 is described as a second sub-antenna radiator 136.

[0072] This embodiment arranges the second antenna radiator 102 and the first antenna radiator 101 along a first direction, and a portion of the third antenna radiator 103 is arranged opposite to and spaced apart from the first antenna radiator 101 along a second direction. Another portion of the third antenna radiator 103 is arranged opposite to and spaced apart from the second antenna radiator 102 along the second direction. The second direction intersects the first direction, which is beneficial for simultaneously achieving coupling between the third antenna radiator 103 and the first antenna radiator 101, as well as coupling between the third antenna radiator 103 and the second antenna radiator 102. This ensures the reliability of coupling between the third antenna radiator 103 and the first antenna radiator 101, as well as coupling between the third antenna radiator 103 and the second antenna radiator 102. It also helps to improve the compactness of the layout among the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103.

[0073] In one possible embodiment, such as Figure 15 As shown, the second direction is orthogonal to the first direction. In this embodiment, the second direction is vertical. The second direction can be referenced in the appendix. Figure 15The Y-axis direction in the diagram. By making the second direction orthogonal to the first direction, a portion of the third antenna radiator 103 and the first antenna radiator 101 can be positioned opposite each other and spaced apart along the second direction. This allows the first sub-coupling path ab to be along the second direction, facilitating the adjustment of the spacing between the third antenna radiator 103 and the first antenna radiator 101 along the second direction. This ensures that the spacing between the third antenna radiator 103 and the first antenna radiator 101 is a first preset distance, which in turn helps to ensure 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 a preset difference. Similarly, by making the second direction orthogonal to the first direction, the third antenna radiator 103 and the second antenna radiator 102 can be positioned opposite each other and spaced apart along the second direction. This allows the third sub-coupling path cd to be along the second direction, making it easier to adjust the spacing between the third antenna radiator 103 and the second antenna radiator 102 along the second direction. This ensures that the spacing between the third antenna radiator 103 and the second antenna radiator 102 is a second preset distance, which in turn helps to ensure 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 a preset difference.

[0074] Furthermore, the first antenna radiator 101 extends along the first direction, the second antenna radiator 102 extends along the first direction, and the third antenna radiator 103 is positioned opposite and spaced apart from the first antenna radiator 101 along the second direction. 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. This improves the reliability of the third antenna radiator 103 simultaneously coupling with the first antenna radiator 101 and the second antenna radiator 102, and also helps to make the spacing between the third antenna radiator 103 and the first antenna radiator 101 equal to the spacing between the third antenna radiator 103 and the second antenna radiator 102. This makes it easier to adjust one of the first preset distance and the second preset distance to ensure 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. Furthermore, the second direction is orthogonal to the first direction, which helps to improve the compactness of the layout among the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103.

[0075] like Figure 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. The first edge 130 and the third edge 132 are arranged opposite each other. The second edge 131 and the fourth edge 133 are arranged opposite each other. It is understood that the third antenna radiator 103 is quadrilateral. In the following embodiments, a rectangular third antenna radiator 103 is used as an example. The first edge 130 and the third edge 132 of the third antenna radiator 103 both extend along a first direction. It is understood that the extension direction of the first edge 130 and 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 second antenna radiator 102. The second edge 131 and the fourth edge 133 of the third antenna radiator 103 both extend along a second direction. In this embodiment, the first edge 130 and the third edge 132 can be the long sides of the third antenna radiator 103, and the second edge 131 and the fourth edge 133 can be the short sides of the third antenna radiator 103; or, the first edge 130 and the third edge 132 can be the short sides of the third antenna radiator 103, and the second edge 131 and the fourth edge 133 can be the long sides of the third antenna radiator 103. In this embodiment, the dimensions of the first edge 130 and the third edge 132 are the same. The dimensions of the second edge 131 and the fourth edge 133 are the same.

[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 connected end to end in sequence, with the first edge 130 and the third edge 132 extending along a first direction and the second edge 131 and the fourth edge 133 extending along a second direction, it is beneficial to realize that the second sub-coupling path ef is along the first direction, thereby facilitating the adjustment of the structural dimensions of the third antenna radiator 103 along the first direction, realizing that the structural dimensions of the third antenna radiator 103 are the preset dimensions, which in turn is beneficial for the current phase of the second coupling path CD to be 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 its dimensions along a first direction and its dimensions along a second direction. By adjusting the dimensions of the third antenna radiator 103 along the first direction, and / or by adjusting its dimensions along the second direction, the current phase of the second coupling path CD can be made opposite to the current phase of the first coupling path AB. Specifically, adjusting the dimensions of the third antenna radiator 103 along the first direction has a greater impact on the current phase of the second coupling path CD, while adjusting its dimensions along the second direction has a smaller impact. In one possible implementation, the current phase of the second coupling path CD can be made opposite to the current phase of the first coupling path AB simply 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 one possible implementation, such as Figure 17 As shown, the size of the first edge 130 can 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 the short sides of the third antenna radiator 103, and the second edge 131 and the fourth edge 133 are the long sides of the third antenna radiator 103.

[0080] Please refer to Figure 18 and Figure 19 The dimensions of the second edge 131 and the fourth edge 133 are both greater than or equal to 3 / 10 of the wavelength of the electromagnetic wave signal transmitted and received by the third antenna radiator 103, and less than or equal to 7 / 10 of the wavelength of the electromagnetic wave signal transmitted and received by the third antenna radiator. In one possible embodiment, the dimensions of the second edge 131 and the fourth edge 133 may both be equal to 1 / 2 the wavelength of the electromagnetic wave signal transmitted and received by the third antenna radiator 103. The dimension of the second edge 131 can be referenced in the appendix. Figure 18 The dimensions of L3 and the fourth edge 133 can be found in the attached diagram. Figure 18 In this embodiment, the dimensions of the second edge 131 and the fourth edge 133 are the same. Of course, in other embodiments, the dimensions of the second edge 131 and the fourth edge 133 may be different.

[0081] In one possible embodiment, the third antenna radiator 103 can transmit and receive electromagnetic wave signals at 2.4 GHz. In this case, the dimensions of the second edge 131 and 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 dimensions of the second edge 131 and 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 dimensions of the second edge 131 and the fourth edge 133 can be adjusted according to factors such as dielectric constant and environmental influences.

[0082] By making the dimensions of the second edge 131 and the fourth edge 133 greater than or equal to 3 / 10 of the wavelength of the electromagnetic wave signal transmitted and received by the third antenna radiator 103, and less than or equal to 7 / 10 of the wavelength of the electromagnetic wave signal transmitted and received by the third antenna radiator, the radio frequency signal source 50 can excite a current flowing in the second direction on the third antenna radiator 103. This makes it easier 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 second antenna radiator 102, thereby improving the isolation between the third antenna radiator 103 and the first antenna radiator 101, as well as the isolation between the third antenna radiator 103 and the second antenna radiator 102.

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

[0084] Understandably, the third feed point 134 is far from the first antenna radiator 101 and far from the second antenna radiator 102. By placing the third feed point 134 at the third edge 132, it is beneficial to ensure 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. This 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, improving the isolation between the third antenna radiator 103 and the second antenna radiator 102. Furthermore, the third feed point 134 is located at the third edge 132, which can keep the third feed point 134 away from the first antenna radiator 101 and the second antenna radiator 102, and prevent the radiated current obtained by the third feed point 134 from being directly coupled to the first antenna radiator 101 or the second antenna radiator 102. This 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] The third feed point 134 can be electrically connected to the radio frequency (RF) signal source 50. The third feed point 134 and the RF signal source 50 can be directly or indirectly connected. When the third feed point 134 and the RF signal source 50 are indirectly connected, they can be connected via conductive springs, conductive posts, feed lines, etc. In one 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 radiated current provided by the RF signal source 50, meaning that the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 operate simultaneously.

[0086] Since the third feed point 134 can be electrically connected to the radio frequency signal source 50, which simultaneously excites the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 for radiation, the first antenna radiator 101 and the second antenna radiator 102 can radiate with the aid 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 aid of the first antenna radiator 101 and the second antenna radiator 102, thus widening 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 achieve wider bandwidth performance than when operating independently.

[0087] In this embodiment, 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 this embodiment, the current flow direction of the first antenna radiator 101 can be along a first direction. The current flow direction of the second antenna radiator 102 can be along a first direction. The current flow direction of the third antenna radiator 103 can be along a 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 guaranteed 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 improved without setting other decoupling structures.

[0088] Furthermore, such as Figure 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. This application does not specifically limit the number of capacitors 104. For example, the number of capacitors 104 can be one, two, three, etc. When there are multiple capacitors 104, they can be connected in series or in parallel. The following embodiment uses one capacitor 104 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] Because the first antenna radiator 101 and the second antenna radiator 102 are made of metal, and the matching circuits electrically connected between the first antenna radiator 101 and the radio frequency signal source 50 and between the first antenna radiator 101 and the reference ground 60, and the matching circuits electrically connected between the second antenna radiator 102 and the radio frequency signal source 50 and between the second antenna radiator 102 and the reference ground 60, the antenna assembly 10 is in an inductive state. Furthermore, by including at least one capacitor 104 in the antenna assembly 10, which is electrically connected between the first ground terminal 112 and the reference ground 60, it is equivalent to forming an LC filter circuit, which can further improve the isolation between the first antenna radiator 101 and the second antenna radiator 102.

[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 one 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. The structure of the antenna assembly 10 is as follows: Figure 22As shown. The first antenna radiator 101 and the second antenna radiator 102 both extend along a first direction. The first free end 110, the first feed point 111, the first ground end 112, the second ground end 120, the second feed point 121, and the second free end 122 are arranged sequentially along the first direction. The first ground end 112 coincides with the second ground 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 L1 between the third antenna radiator 103 and the first antenna radiator 101 is approximately 0.5mm to 2mm. The spacing L2 between the third antenna radiator 103 and the second antenna radiator 102 is approximately 0.5mm to 2mm. The spacing between the third antenna radiator 103 and the first antenna radiator 101, and the spacing between the third antenna radiator 103 and the second antenna radiator 102 are the same. The third feed point 134 is located at the third edge 132 of the third antenna radiator 103. The decoupling principle of the antenna assembly 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. The first coupling path AB includes the electric and magnetic field couplings before the third antenna radiator 103 is added. The second coupling path CD is the 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 regulating the spacing L1 between the third antenna radiator 103 and the first antenna radiator 101, the spacing L2 between the third antenna radiator 103 and the second antenna radiator 102, and the structural dimensions (L5 and / or L6) of the third antenna radiator 103. This makes the current amplitude of the first coupling path AB comparable to that of the second coupling path CD, while the current phase of the first coupling path AB is opposite to that of the second coupling path CD. Thus, the coupling between the first antenna radiator 101 and the second antenna radiator 102 cancels each other out 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. Furthermore, the current on the first antenna radiator 101 is distributed horizontally (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 vertically (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 to each other.Therefore, there is also 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 Figure 23 As shown, Figure 23 for Figure 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 shown are displayed when they are working simultaneously. Figure 23 In the diagram, 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. From curves 1, 2, and 3, it can be seen that the operating frequency bands of the first antenna radiator 101, the second antenna radiator 102, and the third antenna radiator 103 all include 2GHz to 2.5GHz. 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. Curves 4 and 5 show that due to the mutual cancellation of the coupling currents in the first coupling path AB and the second coupling path CD, there is a noticeable indentation in the isolation curve between the first antenna radiator 101 and the second antenna radiator 102, indicating a significant improvement in the isolation between them. Curves 6, 7, 8, and 9 also show 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.

[0093] like Figure 24 As shown, Figure 24 for Figure 22 The S-parameter curves of the first antenna radiator 101 and the second antenna radiator 102 of the antenna assembly 10 shown are displayed when the third antenna radiator 103 is not provided and the first antenna radiator 101 and the second antenna radiator 102 are working. Figure 24In the diagram, curve 10 represents the return loss curve of the first antenna radiator 101 without the third antenna radiator 103. Curve 11 represents the return loss curve of the second antenna radiator 102 without the third antenna radiator 103. Curve 12 represents the isolation curve between the first antenna radiator 101 and the second antenna radiator 102 without the third antenna radiator 103. (Comparison) Figure 23 Middle curve 4 and Figure 24 As can be seen from curve 12, 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 significantly convex, indicating poor isolation between them. Furthermore, in comparison... Figure 23 Middle curve 1 and Figure 24 Medium curve 10, and Figure 23 Middle curve 2 and Figure 24 As can be seen from curve 11, when the third antenna radiator 103 is not set, the bandwidth of the first antenna radiator 101 and the bandwidth of the second antenna radiator 102 are also relatively narrow.

[0094] like Figure 25 As shown, Figure 25 The S-parameter curves are for the third antenna radiator 103 when it operates alone. Figure 25 In the diagram, curve 13 represents the return loss curve of the third antenna radiator 103. (Comparison) Figure 23 Middle curve 3 and Figure 25 As can be seen from curve 13, the bandwidth of the third antenna radiator 103 is relatively narrow when it operates alone.

[0095] In conclusion, combining Figures 23 to 25 It can be seen that, compared with the first antenna radiator 101 and the second antenna radiator 102 working while the third antenna radiator 103 is absent or works alone, the antenna assembly 10 has better isolation and operating bandwidth when the first antenna radiator 101, the second antenna radiator 102 and the third antenna radiator 103 work simultaneously.

[0096] The features mentioned above in the specification, claims, and drawings can be combined in any way as long as they are meaningful within the scope of this application. The advantages and features described with respect to antenna assembly 10 are applied accordingly to electronic device 100.

[0097] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, and such improvements and refinements are also considered to be within the protection scope of this application.

Claims

1. An antenna assembly, characterized by The antenna assembly comprises: a first antenna radiator; a second antenna radiator connected to one end of the first antenna radiator, the second antenna radiator being coupled with the first antenna radiator; and a third antenna radiator, a part of the third antenna radiator being arranged opposite and spaced apart from the first antenna radiator and coupled with the first antenna radiator, and another part of the third antenna radiator being arranged opposite and spaced apart from the second antenna radiator and coupled with the second antenna radiator; wherein the first antenna radiator and the second antenna radiator have a first coupling path of direct coupling and a second coupling path of indirect coupling through the third antenna radiator, the current phase of the second coupling path being opposite to the current phase of the first coupling path; a radio frequency signal source, the radio frequency signal source comprising a first signal source, a second signal source and a third signal source, the first signal source being electrically connected to the first antenna radiator, the second signal source being electrically connected to the second antenna radiator, and the third signal source being electrically connected to the third antenna radiator, the current flow direction of the first antenna radiator excited by the first signal source being orthogonal to the current flow direction of the third antenna radiator excited by the third signal source, and / or the current flow direction of the third antenna radiator excited by the third signal source being orthogonal to the current flow direction of the second antenna radiator excited by the second signal source. When the structure 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.

2. The antenna assembly of claim 1, wherein, 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 a preset difference value.

3. The antenna assembly of claim 1, wherein, 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 a preset difference value.

4. The antenna assembly of claim 3, wherein, The antenna assembly further comprises a reference ground, the second antenna radiator and the first antenna radiator are arranged along a first direction, the first antenna radiator comprises a first free end, a first feeding point and a first ground end arranged in sequence, the first feeding point is electrically connected to the radio frequency signal source, and the first ground end is electrically connected to the reference ground, the second antenna radiator comprises a second ground 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 ground end is electrically connected to the reference ground; the part of the third antenna radiator is arranged opposite and spaced apart from the first antenna radiator along a second direction, and the other part of the third antenna radiator is arranged opposite and spaced apart from the second antenna radiator along the second direction; wherein the second direction intersects the first direction.

5. The antenna assembly of any one of claims 1 to 4, wherein, 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.

6. The antenna assembly of claim 5, wherein, ​ 7. The antenna assembly of claim 5, wherein, The second direction is orthogonal to the first direction.

8. The antenna assembly of claim 5, wherein, The third antenna radiator comprises a first edge, a second edge, a third edge and a fourth edge connected in sequence, the first edge and the third edge are oppositely arranged and both extend along the first direction, and the second edge and the fourth edge are oppositely arranged and both extend along the second direction.

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

10. The antenna assembly of claim 8, wherein, Part of the first edge is located between the third edge and the first antenna radiator, and another part of the first edge is located between the third edge and the second antenna radiator, the third antenna radiator comprises a third feeding point, and the third feeding point is located on the third edge.

11. The antenna assembly of claim 10, wherein, 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 of claim 6, wherein, The antenna assembly further comprises at least one capacitor, and the capacitor is electrically connected between the first ground terminal and the reference ground.

13. The antenna assembly of any one of claims 1 to 4, wherein, The operating frequency range of the first antenna radiator, the operating frequency range of the second antenna radiator and the operating frequency range of the third antenna radiator at least partially overlap.

14. An electronic device, comprising: The antenna assembly comprises a frame and any one of claims 1 to 13, the first antenna radiator and the second antenna radiator are arranged on the frame, and the third antenna radiator is located in the frame.

15. The electronic device of claim 14, wherein, The first antenna radiator and the second antenna radiator are frame-type antenna radiators or embedded-type antenna radiators, and the third antenna radiator is one of an FPC antenna radiator, an LDS antenna radiator and a PCB antenna radiator.

Images