Antenna assembly, radio frequency system and electronic equipment

Abstract

The invention provides an antenna assembly, a radio frequency system and electronic equipment. The antenna assembly comprises a grounding plane, a first antenna, a second antenna and a third antenna. The grounding plane comprises a first side edge, a second side edge, a top edge and a bottom edge; the first antenna comprises a first radiator and a first feed source which are electrically connected, the first radiator is at least partially arranged on the top edge, and the first feed source is electrically connected with the first radiator; the second antenna comprises a second radiator and a second feed source which are electrically connected, the second radiator is arranged on the first side edge, and the second feed source is electrically connected with the second radiator; the third antenna comprises a third radiator and a third feed source which are electrically connected, the third radiator is at least partially arranged at one end, close to the top edge, of the second side edge, and the third feed source is electrically connected with the third radiator; the main radiation directions of the first antenna, the second antenna and the third antenna are different and can support electromagnetic wave signals in a preset frequency range, and the preset frequency range comprises a Bluetooth frequency band or a WiFi 2.4 G frequency band.

Description

Technical Field

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

[0002] With the development of technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, the antenna performance of the antenna components in electronic devices in the related art is poor. Summary of the invention

[0003] In a first aspect, the present application provides an antenna assembly, the antenna assembly comprising:

[0004] A ground plane, comprising a first side edge and a second side edge disposed opposite to each other, and a top edge and a bottom edge connected between the first side edge and the second side edge and opposite to each other;

[0005] A first antenna, comprising a first radiator and a first feed source, wherein the first radiator is at least partially disposed on the top edge, and the first feed source is electrically connected to the first radiator;

[0006] A second antenna comprises a second radiator and a second feed source, wherein the second radiator is disposed on the first side, and the second feed source is electrically connected to the second radiator; and

[0007] The third antenna includes a third radiator and a third feed source, wherein the third radiator is at least partially arranged at one end of the second side edge adjacent to the top edge, and the third feed source is electrically connected to the third radiator; wherein the main radiation directions of the first antenna, the second antenna and the third antenna are different and can all support electromagnetic wave signals within a preset frequency range, and the preset frequency range includes a Bluetooth band or a WiFi 2.4G band.

[0008] To summarize, in the antenna assembly provided in the embodiment of the present application, when the antenna assembly operates in the preset frequency range, the radiation directions of the first antenna, the second antenna and the third antenna are different, and the complementarity of the directional patterns in free space can be achieved, so that the antenna assembly has better communication performance when supporting electromagnetic wave signals in the preset frequency band range.

[0009] In a second aspect, an embodiment of the present application provides a radio frequency system, wherein the radio frequency system includes the antenna assembly as described in the first aspect.

[0010] In a third aspect, an embodiment of the present application provides an electronic device, wherein the electronic device includes the antenna assembly as described in the first aspect; or the electronic device includes the radio frequency system as described in the first aspect.

[0011] The radio frequency system or electronic device provided in the embodiment of the present application includes the antenna assembly. When the antenna assembly operates in the preset frequency range, the main radiation directions of the first antenna, the second antenna and the third antenna are different, and the directional diagrams can be complemented in free space, so that the antenna assembly in the electronic device has better communication performance when supporting electromagnetic wave signals in the preset frequency band range. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0014] Figure 2 for Figure 1 A schematic diagram of a first antenna current in the antenna assembly shown;

[0015] Figure 3 for Figure 1 A schematic diagram of a first antenna current in the antenna assembly shown;

[0016] Figure 4 for Figure 1 A schematic diagram of a first antenna current in the antenna assembly shown;

[0017] Figure 5 A schematic diagram of a radio frequency system provided in one embodiment of the present application;

[0018] Figure 6 A schematic diagram of a radio frequency system including an antenna assembly provided in accordance with an embodiment of the present application;

[0019] Figure 7 The S parameters, system radiation efficiency and system total efficiency simulation curve of the first antenna in the antenna assembly provided in one embodiment of the present application;

[0020] Figure 8 A simulation diagram of the S parameters of the second antenna in the antenna assembly provided in one embodiment of the present application;

[0021] Fig. 9 A simulation diagram of the system radiation efficiency and the system total efficiency of the second antenna in the antenna assembly provided in one embodiment of the present application;

[0022] Fig.10A simulation curve of the S parameters, system radiation efficiency and system total efficiency of the third antenna in the antenna assembly provided in one embodiment of the present application;

[0023] Fig.11 A schematic diagram of an electronic device used for the antenna assembly in scenario 1;

[0024] Fig.12 for Fig.11 Directional patterns of the first antenna and the third antenna of the antenna assembly;

[0025] Fig.13 A schematic diagram of an electronic device used for the antenna assembly in scenario 2;

[0026] Fig.14 for Fig.13 Directional patterns of the first antenna and the third antenna of the antenna assembly;

[0027] Fig.15 The isolation simulation curves of the first antenna, the second antenna and the third antenna in the antenna assembly;

[0028] Fig.16 A three-dimensional schematic diagram of an electronic device provided in one embodiment.

[0029] Description of main component numbers:

[0030] Electronic device 1, radio frequency system 1a, antenna assembly 10, display screen 30, middle frame 50, battery cover 70;

[0031] A ground plane 110, a first side edge 111, a second side edge 112, a top edge 113, and a bottom edge 114;

[0032] A first antenna 120, a first radiator 121, a first feed source S1, a first ground end 1211, a first free end 1212, and a first feeding point P1;

[0033] The second antenna 130, the second radiator 131, the second feed source S2, the first sub-radiator 1311, the second ground terminal 131a, the second free terminal 132b, the second feeding point P2, the second sub-radiator 1312, the third free terminal 131c, the third ground terminal 131d, and the first coupling gap 131f;

[0034] A third antenna 140, a third radiator 141, a third feed source S3, a third sub-radiator 1411, a fourth ground terminal 141a, a fourth free terminal 141b, a third feeding point P3, a fourth sub-radiator 1412, a fifth ground terminal 141c, a fifth free terminal 141d, and a second coupling gap 141f;

[0035] A first channel 11 a , a second channel 11 b , a WCN WiFi module 11 , a first WLAN chip 12 , a bidirectional coupler 13 , a switch unit 14 , and a second WLAN chip 15 . DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In addition, the reference to "embodiment" or "implementation method" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments or implementation methods may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or state relationships based on the positions or state relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0038] In addition, some of the above terms may be used to express other meanings in addition to indicating a position or state relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0039] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different, and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more. The following will be described in detail with reference to the accompanying drawings.

[0041] Please also read Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of a first antenna current in the antenna assembly shown; Figure 3 for Figure 1 A schematic diagram of a first antenna current in the antenna assembly shown; Figure 4 for Figure 1 Schematic diagram of the first antenna current in the antenna assembly shown. The antenna assembly 10 includes a ground plane 110, a first antenna 120 (Ant1), a second antenna 130 (Ant2) and a third antenna 140 (Ant3). The ground plane 110 includes a first side 111 and a second side 112 disposed opposite to each other, and a top side 113 and a bottom side 114 connected between the first side 111 and the second side 112 and opposite to each other. The first antenna 120 includes a first radiator 121 and a first feed S1. The first radiator 121 is at least partially disposed on the top side 113, and the first feed S1 is electrically connected to the first radiator 121. The second antenna 130 includes a second radiator 131 and a second feed S2. The second radiator 131 is disposed on the first side 111, and the second feed S2 is electrically connected to the second radiator 131. The third antenna 140 includes a third radiator 141 and a third feed S3. The third radiator 141 is at least partially disposed at one end of the second side edge 112 adjacent to the top edge 113, and the third feed source S3 is electrically connected to the third radiator 141. The first antenna 120, the second antenna 130, and the third antenna 140 have different main radiation directions and can support electromagnetic wave signals in a preset frequency range, and the preset frequency range includes a Bluetooth frequency band or a WiFi 2.4G frequency band.

[0042] The ground plane 110 is also called a floor, a ground pole, or a ground. Generally speaking, a large piece of metal or alloy constitutes the ground plane 110. When the antenna assembly 10 is applied to an electronic device 1 (see Fig.16 ), the ground plane 110 can be one or more of the middle frame 50 in the electronic device 1, the shielding part of the display screen 30 (also called the screen), or even the conductive battery cover 70.

[0043] It should be noted that in the schematic diagram of this embodiment, the first antenna 120, the second antenna 130, the third antenna 140 and the ground plane 110 are viewed from a top view; in fact, the first ground end 1211 of the first radiator 121 of the first antenna 120 is electrically connected to the ground plane 110, and other parts of the first radiator 121 are spaced apart from the ground plane 110 and are not in direct contact with it. Correspondingly, the second ground end 131a of the first sub-radiator 1311 of the second radiator 131 of the second antenna 130 is electrically connected to the ground plane 110, and other parts of the first sub-radiator 1311 are spaced apart from the ground plane 110 and are not in direct contact with it. Correspondingly, the third ground end 131d of the second sub-radiator 1312 of the second radiator 131 of the second antenna 130 is electrically connected to the ground plane 110, and other parts of the second sub-radiator 1312 are spaced apart from the ground plane 110 and are not in direct contact with it. Accordingly, the fourth grounding end 141a of the third sub-radiator 1411 of the third radiator 141 of the third antenna 140 is electrically connected to the ground plane 110, and the other parts of the third sub-radiator 1411 are arranged at intervals and are not in direct contact with the ground plane 110. Accordingly, the fifth grounding end 141c of the fourth sub-radiator 1412 of the third radiator 141 of the third antenna 140 is electrically connected to the ground plane 110; in addition, the other parts of the fourth sub-radiator 1412 are arranged at intervals and are not in direct contact with the ground plane 110.

[0044] It can be understood that in other embodiments, the first radiator 121 of the first antenna 120, the second radiator 131 of the second antenna 130 and the third radiator 141 of the third antenna 140 may also be located in the same plane as the ground plane 110, or approximately in the same plane, and there is a gap between the first radiator 121 of the first antenna 120, the second radiator 131 of the second antenna 130 and the third radiator 141 of the third antenna 140 and the ground plane 110; the ground end of each radiator or sub-radiator can be electrically connected to the ground plane 110.

[0045] In the perspective of the diagram in this embodiment, the first side 111 is the left side of the ground plane 110, the second side 112 is the right side of the ground plane 110, the top side 113 is the side located at the top of the ground plane 110, and the bottom side 114 is the side located at the bottom of the ground plane 110. It can be understood that it should not be understood as a limitation on the embodiment of the present application. With the different placement positions of the ground plane 110, the positions of the various sides in the ground plane 110 are also different. It can be understood that in the schematic diagram of this embodiment, the ground plane 110 is a rectangle or a nearly rectangular shape. In other embodiments, the ground plane 110 can also be other shapes, such as a square or a nearly square shape.

[0046] The first radiator 121 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the first radiator 121 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the first radiator 121 can be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the first radiator 121 can also be a radiator of a metal frame antenna designed using a metal middle frame 50.

[0047] It is understandable that the present application does not specifically limit the shape, structure and material of the first radiator 121, and the shapes of the first radiator 121 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiator 121 is in a strip shape, the present application does not limit the extension track of the first radiator 121, so the first radiator 121 can be extended in a straight line, a curve, a multi-stage bend, etc. The first radiator 121 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0048] In this embodiment, the first radiator 121 includes two radiating segments, one of the two radiating segments of the first radiator 121 is arranged on the first side 111, and the other of the two radiating segments of the first radiator 121 is arranged on the top edge 113. It can be understood that it should not be understood as a limitation on the embodiments of the present application. In other embodiments, the first radiator 121 can also be entirely arranged on the top edge 113; or, in other embodiments, the first radiator 121 includes two radiating segments, one of the two radiating segments of the first radiator 121 is arranged on the top edge 113, and the other of the two radiating segments of the first radiator 121 is arranged on the second side 112.

[0049] The second radiator 131 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit 110 (FPC) radiator, or a print direct structuring (PDS) second radiator 131, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the second radiator 131 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the second radiator 131 can be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the second radiator 131 can also be a radiator of a metal frame antenna designed using a metal middle frame 50.

[0050] It is understandable that the present application does not specifically limit the shape, structure and material of the second radiator 131. The shapes of the second radiator 131 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the second radiator 131 is in a strip shape, the present application does not limit the extension trajectory of the second radiator 131, so the second radiator 131 can extend in a straight line, a curve, a multi-stage bend, etc. The second radiator 131 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area. The type of the second radiator 131 can be the same as the type of the first radiator 121, or it can be different, which is not limited here. The material of the second radiator 131 can be the same as the material of the first radiator 121, or it can be different, which is not limited here.

[0051] In this embodiment, the second radiator 131 is disposed on the first side 111 as an example for illustration, which is understandable and should not be construed as limiting the embodiments of the present application.

[0052] The third radiator 141 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit 110 (FPC) radiator, or a print direct structuring (PDS) third radiator 141, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the third radiator 141 can be a mechanical design antenna (MDA) third radiator 141 designed using the metal insert of the electronic device 1 itself. For example, the third radiator 141 can be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the third radiator 141 can also be a radiator of a metal frame antenna designed with a metal middle frame.

[0053] It is understandable that the present application does not specifically limit the shape, structure and material of the third radiator 141. The shapes of the third radiator 141 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the third radiator 141 is in a strip shape, the present application does not limit the extension trajectory of the third radiator 141, so the third radiator 141 can extend in a straight line, a curve, a multi-stage bend, etc. The third radiator 141 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area. The type of the third radiator 141 can be the same as the type of the first radiator 121, or it can be different, which is not limited here. The material of the third radiator 141 can be the same as the material of the first radiator 121, or it can be different, which is not limited here.

[0054] In the schematic diagram of this embodiment, a portion of the third radiator 141 is disposed on the bottom edge 114, and another portion of the third radiator 141 is disposed on the second side edge 112. It is understood that this should not constitute a limitation on the embodiment of the present application. In other embodiments, the entire third radiator 141 may also be disposed on the second side edge 112.

[0055] To sum up, in the antenna assembly 10 provided in the embodiment of the present application, when the antenna assembly 10 operates in the preset frequency range, the main radiation directions of the first antenna 120, the second antenna 130 and the third antenna 140 are different, and the complementarity of the directional patterns in free space can be achieved, so that the antenna assembly 10 has better communication performance when supporting electromagnetic wave signals in the preset frequency band range.

[0056] In one embodiment, the main radiation direction of the first antenna 120 is from the first side 111 to the second side 112. The main radiation direction of the second antenna 130 is from the bottom side 114 to the top side 113. The main radiation direction of the third antenna 140 is from the top side 113 to the bottom side 114.

[0057] In the antenna assembly 10 provided in the embodiment of the present application, the main radiation direction of the first antenna 120 is directed from the first side edge 111 to the second side edge 112. The main radiation direction of the second antenna 130 is directed from the bottom edge 114 to the top edge 113. The main radiation direction of the third antenna 140 is directed from the top edge 113 to the bottom edge 114, so that the main radiation directions of the first antenna 120, the second antenna 130 and the third antenna 140 in the antenna assembly 10 are relatively different, and the complementarity of the directional patterns in free space is further achieved, so that the antenna assembly 10 has better communication performance when supporting electromagnetic wave signals in the preset frequency band range.

[0058] The first current, the second current and the third current are described in detail below. Figures 1 to 4 The first feed source S1 is electrically connected to the first feed point P1 to stimulate the first radiator 121 to generate a first current at least partially along the first side 111 and pointing to the second side 112. In the perspective of the figure, the first current flows to the right.

[0059] Please also refer to Figures 1 to 4 The second feed source S2 is electrically connected to the second feed point P2 to excite the second radiator 131 to generate a second current directed from the bottom edge 114 to the top edge 113. In the schematic diagram of this embodiment, the second current flows upward.

[0060] Please also refer to Figures 1 to 4 The third feed source S3 is electrically connected to the third feeding point P3 to stimulate the third radiator 141 to generate a third current directed from the top edge 113 to the bottom edge 114. In the schematic diagram of this embodiment, the third current flows downward.

[0061] It should be noted that, in the antenna assembly 10 provided in this embodiment, the first current refers to the main current generated on the first radiator 121 when the first feed source S1 excites it, not the entire current on the first radiator 121; the second current refers to the main current generated on the second radiator 131 when the second feed source S2 excites it, not the entire current on the second radiator 131; the third current refers to the main current generated on the third radiator 141 when the third feed source S3 excites it, not the entire current on the third radiator 141. The flow direction of the first current is to the right, so the main radiation direction of the first antenna 120 is to the right. The flow direction of the second current is upward, so the main radiation direction of the second antenna 130 is upward. The flow direction of the second current is downward, so the main radiation direction of the third antenna 140 is downward.

[0062] It should be noted that Figures 2 to 4 The directions of the first current, the second current and the third current shown in are only the directions of the alternating current in a certain half-wavelength period. In the next half-wavelength period, the directions of the first current, the second current and the third current will be reversed.

[0063] In addition, it should be noted that the change of current on each radiator belongs to the near-field characteristic of the antenna; while the antenna pattern belongs to the far-field characteristic. The change of the near-field characteristic will not change the far-field characteristic, that is, the change of current on each radiator will not change the antenna pattern. Specifically, in the same resonant mode, when the resonant current on each radiator with different half-wavelength periods is reversed, it will not affect the far-field pattern.

[0064] See also Figure 1 and Figure 2 The first radiator 121 includes a first ground terminal 1211, a first free terminal 1212, and a first feeding point P1. The first ground terminal 1211 is electrically connected to the ground plane 110. The first feeding point P1 is located between the first ground terminal 1211 and the first free terminal 1212, and is electrically connected to the first feed source S1. The first feed source S1 excites the first radiator 121 to generate a first current. The first current is a current corresponding to a quarter-wavelength mode flowing from the first feed source S1 through the first feeding point P1 to the first free terminal 1212.

[0065] The first feeding point P1 being electrically connected to the first feed source S1 may include but is not limited to directly electrically connecting the first feeding point P1 to the first feed source S1 (such as welding), or indirectly electrically connecting the first feeding point P1 to the first feed source S1 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0066] The first current is a current corresponding to a quarter-wavelength mode flowing from the first feed source S1 through the first feed point P1 to the first free end 1212, that is, the first current is a current corresponding to a fundamental mode flowing from the first feed source S1 through the first feed point P1 to the first free end 1212. When the first antenna 120 supports electromagnetic wave signals within the preset frequency band, it operates in the fundamental mode and has a higher radiation efficiency.

[0067] In this implementation, see Figure 1 and Figure 2 The first radiator 121 includes two radiating segments connected by bending, the first grounding end 1211 is located at one of the two radiating segments and corresponds to the first side edge 111, and the first free end 1212 is located at the other of the two radiating segments and is arranged corresponding to the top edge 113.

[0068] The second feeding point P2 being electrically connected to the second feed source S2 may include but is not limited to directly electrically connecting the second feeding point P2 to the second feed source S2 (such as welding), or indirectly electrically connecting the second feeding point P2 to the second feed source S2 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0069] The first grounding terminal 1211 is grounded including but not limited to the following embodiments. The first grounding terminal 1211 is electrically connected to the ground plane 110 in a manner including but not limited to direct electrical connection (such as welding), or indirect electrical connection to the ground plane 110 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0070] The first radiator 121 includes two radiating sections connected by bending, and the bending connection of the two radiating sections corresponds to the bending connection of the first side 111 and the top 113. The portion from the bending connection of the first free end 1212 and the first grounding end 1211 to the first grounding end 1211 is a radiating section, which is arranged corresponding to the first side 111. The portion between the bending connection of the two radiating sections of the first radiator 121 and the first free end 1212 is another radiating section, which is arranged corresponding to the top 113. The direction of the current flowing through the portion between the bending connection of the two radiating sections of the first radiator 121 and the first free end 1212 is from the first side 111 to the second side 112. That is, the portion of the first radiator 121 located at the top 113 supports the first current.

[0071] In the antenna assembly 10 provided in this embodiment, the structure of the first radiator 121 and the arrangement of each part of the first radiator 121 can enable the first excitation signal to better excite the first current on the first radiator 121 along the first side 111 and toward the second side 112 .

[0072] The structure of the second radiator 131 is described in detail below. Figure 1 and Figure 3 , the second radiator 131 is away from the top edge 113 compared to the first radiator 121, and the second radiator 131 includes a first sub-radiator 1311. The first sub-radiator 1311 includes a second grounding end 131a, a second free end 131b and a second feeding point P2. The second grounding end 131a is electrically connected to the ground plane 110, the second feeding point P2 is located between the second grounding end 131a and the second free end 131b, and is electrically connected to the second feed source S2, and the second feed source S2 excites the second radiator 131 to generate a second current. The second current is a current corresponding to a quarter-wavelength mode flowing from the second feed source S2 through the second feeding point P2 to the second free end 131b.

[0073] The first sub-radiator 1311 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit 110 (FPC) radiator, or a print direct structuring (PDS) radiator 131, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the first sub-radiator 1311 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the first sub-radiator 1311 can be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the first sub-radiator 1311 can also be a radiator of a metal frame antenna designed using a metal middle frame 50.

[0074] It is understandable that the present application does not specifically limit the shape, structure and material of the first sub-radiator 1311. The shapes of the first sub-radiator 1311 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first sub-radiator 1311 is in a strip shape, the present application does not limit the extension track of the first sub-radiator 1311, so the first sub-radiator 1311 can be extended in a straight line, a curve, a multi-segment bend, etc. The first sub-radiator 1311 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0075] The second grounding terminal 131a is grounded including but not limited to the following embodiments. The second grounding terminal 131a is electrically connected to the ground plane 110 in a manner including but not limited to direct electrical connection (such as welding), or indirect electrical connection to the ground plane 110 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0076] The second current is a current corresponding to a quarter-wavelength mode flowing from the second feed source S2 through the second feed point P2 to the second free end 131b, that is, the second current is a current corresponding to a fundamental mode flowing from the second feed source S2 through the second feed point P2 to the second free end 131b. When the second antenna 130 supports electromagnetic wave signals within the preset frequency band, it operates in the fundamental mode and has a higher radiation efficiency.

[0077] See also Figure 1 The second radiator 131 includes a first sub-radiator 1311. In addition, the second radiator 131 also includes a second sub-radiator 1312. The second sub-radiator 1312 includes a third free end 131c and a third grounding end 131d. The third free end 131c is opposite to the second free end 131b and is spaced apart to form a first coupling gap 131f. The second sub-radiator 1312 is coupled to the first sub-radiator 1311 through the first coupling gap 131f, and the third grounding end 131d is grounded.

[0078] The second sub-radiator 1312 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit 110 (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the second sub-radiator 1312 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the second sub-radiator 1312 can be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the second sub-radiator 1312 can also be a radiator of a metal frame antenna designed using a metal middle frame 50.

[0079] It is understandable that the present application does not specifically limit the shape, structure and material of the second sub-radiator 1312, and the shapes of the second sub-radiator 1312 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the second sub-radiator 1312 is in a strip shape, the present application does not limit the extension track of the second sub-radiator 1312, so the second sub-radiator 1312 can extend in a straight line, a curve, a multi-segment bending track, etc. The above-mentioned second sub-radiator 1312 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0080] The third grounding terminal 131d is grounded including but not limited to the following embodiments: The third grounding terminal 131d is electrically connected to the ground plane 110 in a manner including but not limited to direct electrical connection (such as welding), or indirect electrical connection to the ground plane 110 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0081] The second radiator 131 includes a first sub-radiator 1311 and a second radiator 131, and the third free end 131c is opposite to the second free end 131b and is spaced apart to form a first coupling gap 131f, so the second sub-radiator 1312 and the first sub-radiator 1311 can be coupled through the first coupling gap 131f. The so-called coupling of the second sub-radiator 1312 and the first sub-radiator 1311 through the first coupling gap 131f means that the second sub-radiator 1312 and the first sub-radiator 1311 are capacitively coupled through the first coupling gap 131f. Here, "capacitive coupling" means that an electric field is generated between the second sub-radiator 1312 and the first sub-radiator 1311, and the signal of the second sub-radiator 1312 can be transmitted to the first sub-radiator 1311 through the electric field, and the signal of the first sub-radiator 1311 can be transmitted to the second sub-radiator 1312 through the electric field, so that the first sub-radiator 1311 and the second sub-radiator 1312 can achieve electrical signal conduction even if they are not in direct contact or direct connection.

[0082] The second sub-radiator 1312 is coupled to the first sub-radiator 1311 through the first coupling gap 131f to form a "mouth-to-mouth" antenna. In one case, when the second antenna 130 is working, not only the first sub-radiator 1311 but also the second sub-radiator 1312 can be used. Compared with using a single radiation branch to support the same frequency band, the total length of the second radiator 131 can be reduced, which is conducive to reducing the size of the antenna assembly 10. When the antenna assembly 10 is applied to the electronic device 1, it is convenient to layout the antenna assembly 10 in the electronic device 1.

[0083] The second antenna 130 further supports at least one of the MHB band and the UHB band.

[0084] Further, in the antenna assembly 10 provided in the embodiment of the present application, in addition to supporting the electromagnetic wave signal in the preset frequency range, the second antenna 130 also supports at least one of the MHB band and the UHB band, including: the second antenna 130 supports the electromagnetic wave signal in the preset frequency range, and the second antenna 130 also supports the electromagnetic wave signal in the MHB band; or, the second antenna 130 supports the electromagnetic wave signal in the preset frequency range, and the second antenna 130 also supports the electromagnetic wave signal in the UHB band; or, the second antenna 130 supports the electromagnetic wave signal in the preset frequency range, and the second antenna 130 also supports the MHB band, and the electromagnetic wave signal in the UHB band. The second antenna 130 supports the electromagnetic wave signal in the preset frequency range, and the second antenna 130 also supports at least one of the MHB band and the UHB band. It can be seen that the second antenna 130 can support more frequency bands, and the antenna assembly 10 has a better communication effect.

[0085] The third free end 131c and the second free end 131b are opposite to each other and are spaced apart to form a first coupling gap 131f. When the second antenna 130 operates in at least one of the MHB frequency band and the UHB frequency band, not only the first sub-radiator 1311 but also the second sub-radiator 1312 can be utilized. Compared with using a single radiation branch to support at least one of the MHB frequency band and the UHB frequency band, the total length of the second radiator 131 can be reduced, which is beneficial to reducing the size of the antenna component 10. When the antenna component 10 is applied to the electronic device 1, it is convenient to layout the antenna component 10 in the electronic device 1.

[0086] It can be understood that in this embodiment, the second radiator 131 includes the first sub-radiator 1311 and the second sub-radiator 1312 as an example for illustration. It can be understood that in other embodiments, the second radiator 131 only includes the first sub-radiator 1311, but does not include the second sub-radiator 1312. When the second radiator 131 only includes the first sub-radiator 1311, but does not include the second sub-radiator 1312, the second antenna 130 can support electromagnetic wave signals in the preset frequency range, but does not support the MHB frequency band and does not support the UHB frequency band.

[0087] Furthermore, the second radiator 131 is disposed at an end of the first side edge 111 adjacent to the top edge 113 .

[0088] In the schematic diagram of this embodiment, the first radiator 121 is disposed at the bent connection between the first side 111 and the top side 113 , and the second radiator 131 is disposed at the first side 111 , and the second radiator 131 is away from the top side 113 compared to the first radiator 121 .

[0089] The second radiator 131 is arranged at one end of the top edge 113 adjacent to the first side edge 111, so that when the antenna component 10 where the second radiator 131 is located is used in the electronic device 1, it is not easy to be held when the electronic device 1 is in the horizontal state, thereby improving the antenna performance of the electronic device 1 to which the antenna component 10 is applied when in the horizontal state.

[0090] The structure of the third radiator 141 is described in detail below. Figure 1 and Figure 4 The third radiator 141 includes a third sub-radiator 1411 and a fourth sub-radiator 1412. The third sub-radiator 1411 includes a fourth ground terminal 141a, a fourth free terminal 141b and a third feeding point P3. The fourth ground terminal 141a is electrically connected to the ground plane 110, and the third feeding point P3 is located between the fourth ground terminal 141a and the fourth free terminal 141b, and is electrically connected to the third feed source S3. The fourth sub-radiator 1412 includes a fifth free terminal 141d and a fifth ground terminal 141c. The fifth free terminal 141d is opposite to the fourth free terminal 141b and is spaced to form a second coupling gap 141f. The fourth sub-radiator 1412 is coupled to the third sub-radiator 1411 through the second coupling gap 141f, and the fifth ground terminal 141d is grounded. The third feed source S3 excites the fourth sub-radiator 1412 to generate a third current, and the third current is a current corresponding to a quarter-wavelength mode from the fifth ground end 141c to the fifth free end 141d.

[0091] The third feeding point P3 being electrically connected to the third feed source S3 may include but is not limited to being directly electrically connected to the third feeding point P3 (such as welding), or indirectly electrically connected to the third feed source S3 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0092] The third sub-radiator 1411 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit 110 (FPC) radiator, or a print direct structuring (PDS) radiator 131, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the third sub-radiator 1411 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the third sub-radiator 1411 can be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the third sub-radiator 1411 can also be a radiator of a metal frame antenna designed using a metal middle frame 50.

[0093] It is understandable that the present application does not specifically limit the shape, structure and material of the third sub-radiator 1411. The shapes of the third sub-radiator 1411 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the third sub-radiator 1411 is in a strip shape, the present application does not limit the extension track of the third sub-radiator 1411, so the third sub-radiator 1411 can be extended in a straight line, a curve, a multi-segment bending track, etc. The third sub-radiator 1411 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0094] The fourth sub-radiator 1412 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit 110 (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the fourth sub-radiator 1412 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the fourth sub-radiator 1412 can be an antenna radiator designed using the middle frame 50 formed of plastic and metal of the electronic device 1. In addition, the fourth sub-radiator 1412 can also be a radiator of a metal frame antenna designed using a metal middle frame 50.

[0095] It is understandable that the present application does not specifically limit the shape, structure and material of the fourth sub-radiator 1412. The shapes of the fourth sub-radiator 1412 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the fourth sub-radiator 1412 is in a strip shape, the present application does not limit the extension track of the fourth sub-radiator 1412, so the fourth sub-radiator 1412 can be extended in a straight line, a curve, a multi-segment bending track, etc. The fourth sub-radiator 1412 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0096] The fourth grounding terminal 141a is grounded including but not limited to the following embodiments. The fourth grounding terminal 141a is electrically connected to the ground plane 110 in a manner including but not limited to direct electrical connection (such as welding), or indirect electrical connection to the ground plane 110 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0097] The fifth grounding terminal 141c is grounded including but not limited to the following embodiments: The fifth grounding terminal 141c is electrically connected to the ground plane 110 in a manner including but not limited to direct electrical connection (such as welding), or indirect electrical connection to the ground plane 110 through a coaxial line, a microstrip line, a conductive spring, a conductive adhesive, etc.

[0098] The fifth free end 141d is opposite to the fourth free end 141b and is spaced apart to form a second coupling gap 141f, so that the third sub-radiator 1411 and the fourth sub-radiator 1412 can be coupled through the second coupling gap 141f. The so-called coupling of the third sub-radiator 1411 and the fourth sub-radiator 1412 through the second coupling gap 141f means that the third sub-radiator 1411 and the fourth sub-radiator 1412 are capacitively coupled through the second coupling gap 141f. An electric field is generated between the third sub-radiator 1411 and the fourth sub-radiator 1412, and the signal of the third sub-radiator 1411 can be transmitted to the fourth radiator through the electric field, and the signal of the fourth sub-radiator 1412 can be transmitted to the third sub-radiator 1411 through the electric field, so that the third sub-radiator 1411 and the fourth sub-radiator 1412 can achieve electrical signal conduction even in a state of not directly contacting or not directly connected.

[0099] The third sub-radiator 1411 is coupled with the fourth sub-radiator 1412 through the second coupling gap 141f to form a "mouth-to-mouth" antenna. In one case, when the third antenna 140 is working, not only the third sub-radiator 1411 but also the fourth sub-radiator 1412 can be used. Compared with using a single radiation branch to support the same frequency band, the total length of the third radiator 141 can be reduced, which is conducive to reducing the size of the antenna assembly 10. When the antenna assembly 10 is applied to the electronic device 1, it is convenient to layout the antenna assembly 10 in the electronic device 1.

[0100] The third sub-radiator 1411 is a main branch in the third antenna 140 , and the fourth sub-radiator 1412 is a parasitic branch in the third antenna 140 .

[0101] The third current is a current corresponding to a quarter-wavelength mode from the fifth ground terminal 141c to the fifth free terminal 141d, that is, the third current is a current corresponding to a fundamental mode flowing from the fifth ground terminal 141c to the fifth free terminal 141d. When the third antenna 140 supports electromagnetic wave signals within the preset frequency band, it operates in the fundamental mode and has good radiation efficiency.

[0102] It should be noted that in the schematic diagram of this embodiment, the specific structures of the first radiator 121, the second radiator 131 and the third radiator 141 should not be understood as limiting the embodiments of this application. The structures of the first radiator 121, the second radiator 131 and the third radiator 141 are independent of each other and do not affect each other.

[0103] The third sub-radiator 1411 includes two radiating segments connected by bending, one of the two radiating segments is arranged corresponding to the bottom edge 114, and the other of the two radiating segments is arranged corresponding to the second side edge. The fourth grounding end 141a is located at one of the two radiating segments and is arranged corresponding to the bottom edge 114; the fourth free end 141b is located at the other of the two radiating segments and is arranged corresponding to the second side edge 112, the fourth sub-radiator 1412 is arranged at the second side edge 112, and the fourth sub-radiator 1412 is away from the bottom edge 114 compared to the fourth free end 141b.

[0104] The above-mentioned position setting of the third sub-radiator 1411 and the fourth sub-radiator 1412 in the third radiator 141 can make the third antenna 140 and the first antenna 120 have good isolation, and can make the third antenna 140 and the second antenna 130 have good isolation. In addition, the above-mentioned position setting of the third sub-radiator 1411 and the fourth sub-radiator 1412 in the third radiator 141 can make the antenna assembly 10 have good gain when supporting the electromagnetic wave signal in the preset frequency range.

[0105] In one implementation, the third antenna 140 further supports a low frequency (Low Band, LB) band.

[0106] Specifically, in one embodiment, the third sub-radiator 1411 is a main branch in the third radiator 141 , the third sub-radiator 1411 and the fourth sub-radiator 1412 jointly support the LB frequency band, and the fourth sub-radiator 1412 supports the preset frequency range.

[0107] The third antenna 140 supports electromagnetic wave signals in the preset frequency range, and the third antenna 140 also supports the LB frequency band. It can be seen that the third antenna 140 can support more frequency bands, and the antenna assembly 10 has a better communication effect.

[0108] In this embodiment, the preset frequency range is 2.4 GHz to 2.5 GHz. Specifically, in this embodiment, the frequency bands included in the preset frequency range are WiFi 2.4G band (frequency band range is 2.4 GHz to 2.5 GHz) and Bluetooth (BT) band. It should be noted that when the first antenna 120 supports the preset frequency range, the first antenna 120 can structurally support the WiFi 2.4G band and the Bluetooth band, realizing that the WiFi 2.4G antenna and the Bluetooth (BT) antenna share the same antenna. As for whether the first antenna 120 works in the WiFi 2.4G band or the Bluetooth band, it depends on the first excitation signal generated by the first feed source S1 in the first antenna 120. When the first excitation signal is an excitation signal for exciting the WiFi 2.4G band, the first antenna 120 is a WiFi 2.4G antenna. When the first excitation signal is an excitation signal for exciting the Bluetooth band, the first antenna 120 is a Bluetooth antenna. In another embodiment, the first antenna 120 may also be an antenna that time-division multiplexes the WiFi 2.4G frequency band and the Bluetooth frequency band. At a certain moment, the first antenna 120 may only support one of the WiFi 2.4G frequency band and the Bluetooth frequency band.

[0109] When the first antenna 120 supports the Bluetooth frequency band, the electronic device 1 (such as a mobile phone) to which the antenna assembly 10 is applied can communicate with other devices supporting the Bluetooth frequency band (such as a Bluetooth headset) for listening to music, voice calls, etc., bringing great convenience to people's entertainment life.

[0110] Accordingly, when the second antenna 130 supports the preset frequency range, the second antenna 130 can structurally support the WiFi 2.4G frequency band and the Bluetooth frequency band, realizing that the WiFi 2.4G antenna and the Bluetooth (BT) antenna share the same antenna. As for whether the second antenna 130 works in the WiFi 2.4G frequency band or the Bluetooth frequency band, it depends on the first excitation signal generated by the first feed source S1 in the second antenna 130. When the first excitation signal is an excitation signal for exciting the WiFi 2.4G frequency band, the second antenna 130 is a WiFi 2.4G antenna. When the first excitation signal is an excitation signal for exciting the Bluetooth frequency band, the second antenna 130 is a Bluetooth antenna. In another embodiment, the second antenna 130 can also be an antenna that time-division multiplexes the WiFi 2.4G frequency band and the Bluetooth frequency band. At a certain moment, the second antenna 130 can only support one of the WiFi 2.4G frequency band and the Bluetooth frequency band.

[0111] Accordingly, when the third antenna 140 supports the preset frequency range, the third antenna 140 can structurally support the WiFi 2.4G frequency band and the Bluetooth frequency band, realizing that the WiFi 2.4G antenna and the Bluetooth (BT) antenna share the same antenna. As for whether the third antenna 140 works in the WiFi 2.4G frequency band or the Bluetooth frequency band, it depends on the first excitation signal generated by the first feed source S1 in the third antenna 140. When the first excitation signal is an excitation signal for exciting the WiFi 2.4G frequency band, the third antenna 140 is a WiFi 2.4G antenna. When the first excitation signal is an excitation signal for exciting the Bluetooth frequency band, the third antenna 140 is a Bluetooth antenna. In another embodiment, the third antenna 140 can also be an antenna that time-division multiplexes the WiFi 2.4G frequency band and the Bluetooth frequency band. At a certain moment, the second antenna 130 can only support one of the WiFi 2.4G frequency band and the Bluetooth frequency band.

[0112] Next, in each implementation manner, the radio frequency system 1a including the antenna assembly 10 is introduced.

[0113] See also Figure 5 , Figure 5 A schematic diagram of a radio frequency system provided in one embodiment of the present application. The radio frequency system 1a includes an antenna assembly 10 provided in any of the above embodiments. The antenna assembly 10 is described in the above description and will not be described again here.

[0114] The frequency bands supported by the first antenna 120 , the second antenna 130 , and the third antenna 140 in the antenna assembly 10 in the radio frequency system 1 a are described in detail below.

[0115] In the radio frequency system 1a provided in one embodiment, the first antenna 120, the second antenna 130 and the third antenna 140 can all support the WiFi 2.4G frequency band, and one of the first antenna 120 and the third antenna 140 serves as the first channel of the WiFi 2.4G frequency band. The second antenna 130 serves as the second channel of the WiFi 2.4G frequency band to implement a 2×2 multi-input multi-output (MIMO) antenna of the WiFi 2.4G frequency band.

[0116] One of the first antenna 120 and the third antenna 140 serves as the first channel of the WiFi 2.4G frequency band. The second antenna 130 serves as the second channel of the WiFi 2.4G frequency band. Therefore, it can be considered that two of the three antennas in the antenna assembly 10 support the WiFi 2.4G frequency band, and therefore, it can be called a two-out-of-three WiFi 2.4G frequency band.

[0117] In the antenna assembly 10 provided in this embodiment, the first antenna 120, the second antenna 130 and the third antenna 140 can all support the WiFi 2.4G frequency band, so the antenna assembly 10 can be regarded as a three-antenna design for the WiFi 2.4G frequency band. In the specific communication process, it is a 2×2 MIMO antenna for the WiFi 2.4G frequency band, that is, two antennas are selected from the three antennas (the first antenna 120, the second antenna 130 and the third antenna 140) supporting the WiFi 2.4G frequency band to form a 2×2 MIMO antenna, that is, a three-choose-two mode.

[0118] Specifically, the antenna assembly 10 includes two WiFi 2.4G frequency band channels (Tx), wherein the first channel (WiFi Chain 0) is selected between the first antenna 120 and the third antenna 140, that is, one of the first antenna 120 and the third antenna 140 is used as the antenna of the first channel of the WiFi 2.4G frequency band; and the second antenna 130 is used as the antenna of the second channel (WiFi Chain 1) of the WiFi2.4G frequency band.

[0119] In one embodiment, see Figure 6 , Figure 6A schematic diagram of a radio frequency system including an antenna assembly provided for one embodiment of the present application. In one embodiment, the radio frequency system 1a includes a first channel 11a (WiFi Chain 0) of the WiFi 2.4G frequency band and a second channel 11b (WiFi Chain 1) of the WiFi 2.4G frequency band. In one embodiment, the radio frequency system 1a includes a wireless communication network (Wireless Communications Networks, WCN) WiFi module 11, a first wireless local area network (Wireless Local Area Networks, WLAN) chip 12, a bidirectional coupler 13, a switch unit 14 and a second WLAN chip 15. The WCN WiFi module 11 is electrically connected to the first LAN chip 12, the bidirectional coupler 13 to the switch unit 14 in sequence, and the switch unit 14 is also electrically connected to the first antenna 120 and the third antenna 140; the WCN WiFi module 11 is also electrically connected to the second LAN chip 15 to the second antenna 130. The switch unit 14 is used to electrically connect one of the first antenna 120 and the third antenna 140 to the WCN WiFi module 11 to serve as a working antenna of the first channel 11 a .

[0120] In this embodiment, one of the first antenna 120 and the third antenna 140 is used as the working antenna of the first channel 11a of the WiFi 2.4G band. The second antenna 130 is used as the working antenna of the second channel 11b of the WiFi 2.4G band to realize the 2×2 MIMO antenna of the WiFi 2.4G band, so that the antenna assembly 10 has a higher data throughput and better communication performance when supporting the WiFi 2.4G band.

[0121] In one embodiment, when both the first antenna 120 and the third antenna 140 can support the WiFi 2.4G frequency band, when the signal quality of the first antenna 120 is better than the signal quality of the third antenna 140, the first antenna 120 is selected as the first channel 11a of the WiFi 2.4G frequency band; accordingly, when the signal quality of the third antenna 140 is better than the antenna quality of the first signal, the third antenna 140 is selected as the first channel 11a of the WiFi 2.4G frequency band.

[0122] In another embodiment, the one with the best signal quality among the first antenna 120 , the second antenna 130 and the third antenna 140 is used to support the Bluetooth frequency band, and the other two of the first antenna 120 , the second antenna 130 and the third antenna 140 are used to support the WiFi 2.4G frequency band.

[0123] When the electronic device 1 (such as a mobile phone) to which the antenna assembly 10 is applied communicates with other devices (such as a Bluetooth headset) using the Bluetooth frequency band (such as listening to music or making voice calls), the signal quality of the Bluetooth frequency band of the antenna assembly 10 can be sensed more intuitively. For example, when the electronic device 1 (such as a mobile phone) to which the antenna assembly 10 is applied communicates with other devices (such as a Bluetooth headset) using the Bluetooth frequency band (such as listening to music or making voice calls), when the signal quality of the Bluetooth frequency band of the antenna assembly 10 is not good, the user can clearly feel the communication jam (such as intermittent listening to music, unclear calls), etc.

[0124] In the implementation manner of the present application, the one with the best signal quality among the first antenna 120, the second antenna 130 and the third antenna 140 is used to support the Bluetooth frequency band, and the other two among the first antenna 120, the second antenna 130 and the third antenna 140 are used to support the WiFi 2.4G frequency band, so that the antenna assembly 10 has better communication quality when supporting the Bluetooth frequency band. The electronic device 1 (such as a mobile phone) used by the antenna assembly 10 has a better experience when communicating (such as listening to music or making voice calls) using the Bluetooth frequency band.

[0125] In another embodiment, the one with the best signal quality among the first antenna 120 and the third antenna 140 is used to support the Bluetooth band, the other of the first antenna 120 and the third antenna 140 is used to support the WiFi 2.4G band, and the second antenna 130 is used to support the WiFi 2.4G band, so as to realize the frequency division duplex (FDD) of WiFi 2.4G band 2×2 MIMO antenna + Bluetooth band 1×1.

[0126] Since the one with the best signal quality among the first antenna 120 and the third antenna 140 is used to support the Bluetooth frequency band, it can be regarded as selecting one supporting the Bluetooth frequency band from the two antennas in the antenna assembly 10, that is, realizing the two-choice of antennas supporting the Bluetooth frequency band, also known as BT two-choice.

[0127] In this embodiment, it can be seen from the above description of the first antenna 120, the second antenna 130 and the third antenna 140 that the position of the first antenna 120 and the position of the third antenna 140 are both optimal compared to the position of the second antenna 130. In the antenna assembly 10 provided in the embodiment of the present application, the one with the best quality among the first antenna 120 and the third antenna 140 supports the Bluetooth frequency band, thereby ensuring that the position of the antenna supporting the Bluetooth frequency band of the antenna assembly 10 is optimal and the communication quality is good. In addition, the other of the first antenna 120 and the third antenna 140 supports the WiFi 2.4G frequency band, and the second antenna 130 is used to support the WiFi 2.4G frequency band to realize the FDD of the WiFi 2.4G frequency band 2×2 MIMO antenna + Bluetooth frequency band 1×1, that is, the Bluetooth frequency band and the WiFi 2.4G frequency band coexistence (BTC) function is realized. The antenna assembly 10 can use both the WiFi 2.4G frequency band and the Bluetooth frequency band for communication, and has a good communication effect.

[0128] In another embodiment, the second antenna 130 is used to support the WiFi 2.4G band; the best quality one of the first antenna 120 and the third antenna 140 is used to support the Bluetooth band to achieve frequency division duplex (FDD) of WiFi 2.4G band 1×1 + Bluetooth band 1×1.

[0129] In this embodiment, the one with the best quality among the first antenna 120 and the third antenna 140 is used to support the Bluetooth frequency band. Therefore, it is also regarded as selecting one of the two antennas in the antenna assembly 10 to support the Bluetooth frequency band, that is, realizing the two-choice of antennas supporting the Bluetooth frequency band, also known as BT two-choice.

[0130] In this embodiment, it can be seen from the above description of the first antenna 120, the second antenna 130 and the third antenna 140 that compared with the position of the second antenna 130, the position of the first antenna 120 and the position of the third antenna 140 are both optimal. In the antenna assembly 10 provided in the embodiment of the present application, the best quality one of the first antenna 120 and the third antenna 140 supports the Bluetooth frequency band, thereby ensuring that the position of the antenna supporting the Bluetooth frequency band of the antenna assembly 10 is optimal and the communication quality is good. In addition, the second antenna 130 is used to support the WiFi 2.4G frequency band, and the best quality one of the first antenna 120 and the third antenna 140 is used to support the Bluetooth frequency band, realizing the coexistence (BTC) function of the Bluetooth frequency band and the WiFi2.4G frequency band. The antenna assembly 10 can communicate using both the WiFi 2.4G frequency band and the Bluetooth frequency band, and has a good communication effect.

[0131] The performance of the antenna assembly 10 provided in the embodiment of the present application is analyzed, simulated and described below.

[0132] See also Figure 7 , Figure 7 The S parameter, system radiation efficiency and system total efficiency simulation curve of the first antenna in the antenna assembly provided in one embodiment of the present application. In this simulation graph, the horizontal axis is the frequency in GHz; the vertical axis is in dB. Among them, curve ① is the S parameter (S3,3) curve of the first antenna 120, curve ② is the system radiation efficiency (System Rad. Efficiency) curve of the first antenna 120, and curve ③ is the system total efficiency (System Tot. Efficiency) curve of the first antenna 120.

[0133] In this embodiment, in addition to supporting the preset frequency range (2.4GHz~2.5GHz), the first antenna 120 also supports the GPS L5 frequency band. In the simulation diagram of this embodiment, only the preset frequency range (2.4GHz~2.5GHz, such as the Bluetooth frequency band, or the WiFi 2.4G frequency band) can be focused on. It can be seen from this simulation diagram that the coordinate value at point 1 is (1.575, -2.8043), which shows that the antenna assembly 10 works in the GPS L1 frequency band; the coordinate value at point 2 is (2.4, -3.9254), which shows that the antenna assembly 10 works in the preset frequency range. In addition, it can be seen that the first antenna 120 has good system efficiency and system radiation efficiency in the preset frequency range.

[0134] See also Figure 8 , Figure 8A simulation diagram of the S parameters of the second antenna in the antenna assembly provided in one embodiment of the present application. In this simulation diagram, the horizontal axis is frequency, in GHz; the vertical axis is S parameter, in dB. In this embodiment, in addition to supporting the preset frequency range (2.4GHz~2.5GHz), the second antenna 130 also supports the MHB band + UHB band. In this simulation diagram, curve ① is the S parameter curve of the second antenna 130 supporting the preset frequency range (2.4GHz~2.5GHz) and the B1 band in the MHB band. Curve ② is the S parameter curve of the second antenna 130 supporting the preset frequency range (2.4GHz~2.5GHz) and the B3 band in the MHB band. Among them, the coordinates at point 2 in curve ① are (2.6003, -19.106) and belong to the preset frequency range (2.4GHz~2.5GHz). It can be seen that the second antenna 130 supports not only the preset frequency range (2.4GHz~2.5GHz) but also the B1 frequency band; the coordinates of the midpoint 5 of curve ② are (2.5685, -7.4893) and belong to the preset frequency range (2.4GHz~2.5GHz). It can be seen that the second antenna 130 supports not only the preset frequency range (2.4GHz~2.5GHz) but also the B3 frequency band. When the frequency band supported by the second antenna 130 is switched from the B1 frequency band to the B3 frequency band, or from the B3 frequency band to the B1 frequency band, the second antenna 130 supports the preset frequency range (2.4GHz~2.5GHz). That is, when the second antenna 130 switches between the B1 frequency band and the B3 frequency band, it has little or no effect on the supported preset frequency range (2.4GHz~2.5GHz).

[0135] See also Fig. 9 , Fig. 9This is a simulation diagram of the system radiation efficiency and system total efficiency of the second antenna in the antenna assembly provided in one embodiment of the present application. In this simulation diagram, the horizontal axis is frequency, in GHz; the vertical axis is efficiency, in dB. Among them, curve ① is the system radiation efficiency (System Rad. Efficiency) curve when the second antenna 130 supports the B1 frequency band in the MHB frequency band and the preset frequency range (2.4GHz~2.5GHz), and curve ② is the system total efficiency (System Tot. Efficiency) curve when the second antenna 130 supports the B1 frequency band in the MHB frequency band and the preset frequency range (2.4GHz~2.5GHz). Curve ③ is the system radiation efficiency (System Rad. Efficiency) curve when the second antenna 130 supports the B3 band in the MHB band and the preset frequency range (2.4GHz~2.5GHz), and curve ④ is the system total efficiency (System Tot. Efficiency) curve when the second antenna 130 supports the B3 band in the MHB band and the preset frequency range (2.4GHz~2.5GHz).

[0136] It can be seen from curves ① and ② that the second antenna 130 has a higher system total efficiency and system radiation efficiency when supporting the B1 frequency band and the preset frequency range (2.4GHz~2.5GHz). It can be seen from curves ③ and ④ that the second antenna 130 has a higher system total efficiency and system radiation efficiency when supporting the B3 frequency band and the preset frequency range (2.4GHz~2.5GHz). In addition, it can be seen from curves ①, ②, ③ and ④ that when the frequency band supported by the second antenna 130 is switched from the B1 frequency band to the B3 frequency band, or from the B3 frequency band to the B1 frequency band, the second antenna 130 has a higher system total efficiency and system radiation efficiency in the supported preset frequency range (2.4GHz~2.5GHz). That is, when the second antenna 130 switches between the B1 frequency band and the B3 frequency band, it has little or no effect on the system total efficiency and system radiation efficiency of the supported preset frequency range (2.4GHz~2.5GHz).

[0137] See also Fig.10 , Fig.10The S parameter, system radiation efficiency and system total efficiency simulation curve of the third antenna in the antenna assembly provided in one embodiment of the present application. In this simulation graph, the horizontal axis is the frequency in GHz; the vertical unit is dB. Among them, curve ① is the S parameter (S1,1) curve of the third antenna 140, curve ② is the system radiation efficiency (System Rad. Efficiency) curve of the third antenna 140, and curve ③ is the system total efficiency (System Tot. Efficiency) curve of the third antenna 140.

[0138] In this embodiment, the third antenna 140 supports not only the preset frequency range (2.4GHz to 2.5GHz) but also the low frequency (LB) band. In the simulation diagram of this embodiment, only the preset frequency range (2.4GHz to 2.5GHz, such as the Bluetooth band or the WiFi 2.4G band) can be focused on. It can be seen from this simulation diagram that in curve ①, the coordinate value at point 1 is (0.7424, -16.684), that is, the third antenna 140 can work in the N28 band in the LB band, and the coordinate value at point 2 is (0.936, -5.1403), that is, the third antenna 140 can work in the N8 band or the B8 band in the LB band, that is, it can be seen from curve ① that the antenna assembly 10 works in the LB band; in addition, it can be seen from the rightmost concave point of curve ① that the third antenna 140 antenna assembly 10 approximately works in the preset frequency range. In addition, it can be seen from curve ② and curve ③ that the third antenna 140 has good system efficiency and system radiation efficiency in the preset frequency range.

[0139] The following is an analysis and simulation of the situation when the antenna assembly 10 is applied to the electronic device 1 in scenario one and scenario two. The specific situation of scenario one and scenario two will be described in detail later. When the antenna assembly 10 is applied to the electronic device 1, the top edge 113 of the ground plane 110 corresponds to the top edge 113 of the electronic device 1, the bottom edge 114 of the ground plane 110 corresponds to the bottom edge 114 of the electronic device 1, the first side edge 111 (left side) of the ground plane 110 is the left side when the electronic device 1 is viewed from the battery cover 70, and the second side edge 112 (right side) of the ground plane 110 is also the right side when the electronic device 1 is viewed from the battery cover 70.

[0140] See also Fig.11 and Fig.12 , Fig.11 A schematic diagram of an electronic device used for the antenna assembly in scenario 1; Fig.12 for Fig.11The directional patterns of the first antenna and the third antenna 140 of the antenna assembly in the embodiment. Specifically, during the simulation, the top of the electronic device 1 is facing downward and the top is not close to the user's leg 2, and the USB port of the electronic device 1 is facing upward and placed in the trouser pocket. The screen of the electronic device 1 (also called the display screen) is closer to the user's leg 2 than the cover of the electronic device 1, and the distance between the electronic device 1 and the user's leg 2 is 2mm or approximately 2mm (referred to as Scenario 1). Fig.12 In the figure, curve ① is the directional diagram of the first antenna 120, and curve ② is the directional diagram of the third antenna 140; and the horizontal right direction is the direction of the USB port (referred to as the USB direction, marked as D1 in the figure), and the direction perpendicular to the paper is the direction of the screen (referred to as the screen direction, marked as D2 in the figure). There is a zero point at point 1 of curve ① (240° direction), and the directivity is better at point 3 of curve ②. Compared with the first antenna 120, the third antenna 140 is complementary to the zero point in the USB direction, and the gain is increased by 9dB. This shows that when the electronic device 1 used by the antenna assembly 10 is in scene 1, if the antenna assembly 10 is used to communicate in the preset frequency range, the first antenna 120 in the antenna assembly 10 will have a zero point in the 240° direction (USB direction or approximately USB direction), and the communication performance in this direction is poor. The third antenna 140 in the antenna assembly 10 will have better performance in the 240° direction. Therefore, if the electronic device 1 to which the antenna assembly 10 is applied is in scene one, the third antenna 140 in the antenna assembly 10 can be used to support the Bluetooth frequency band, or the antenna supporting the Bluetooth frequency band in the antenna assembly 10 can be switched from the first antenna 120 to the third antenna 140. Therefore, the antenna assembly 10 can realize the zero point compensation schematic diagram in the USB direction through intelligent switching. It should be noted that, usually, the USB port of the electronic device 1 is located at the bottom of the electronic device 1. In this embodiment, the electronic device 1 to which the antenna assembly 10 is applied includes a USB port as an example for simulation. If the electronic device 1 to which the antenna assembly 10 is applied does not include a USB port, the direction of the USB port is the bottom of the electronic device 1. When the electronic device 1 to which the antenna assembly 10 is applied does not include a USB port, it has no effect on the simulation results.

[0141] See also Fig.13 and Fig.14 , Fig.13 A schematic diagram of an electronic device used for the antenna assembly in scenario 2; Fig.14 for Fig.13Specifically, during the simulation, the electronic device 1 is placed with its top facing downward and against the user's leg 2, and its USB port facing upward into the trouser pocket. The screen of the electronic device 1 is closer to the user's leg 2 than the cover of the electronic device 1, and the bottom of the electronic device 1 is 2 mm or approximately 2 mm away from the user's leg 2 (hereinafter referred to as Scenario 2). Fig.13 As shown in the right end of the electronic device 1 in FIG. 1 , the first antenna 120 of the antenna assembly 10 is completely blocked. Fig.14 In the figure, curve ① is the directional diagram of the first antenna 120, and curve ② is the directional diagram of the third antenna 140; and the horizontal right direction is the direction of the USB port (referred to as the USB direction), and the direction perpendicular to the paper is the direction of the screen (referred to as the screen direction). There is a zero point at point 1 of curve ① (240° direction), and the directivity is better at point 3 of curve ②. Compared with the first antenna 120, the third antenna 140 is complementary to the zero point in the USB direction, and the gain improvement is greater than 20dB. This shows that when the electronic device 1 using the antenna assembly 10 is in scene 2, if the antenna assembly 10 is used to communicate in the preset frequency range, the first antenna 120 in the antenna assembly 10 will have a zero point near the 240° direction (USB direction or approximately USB direction), and the communication performance in this direction is poor. The third antenna 140 in the antenna assembly 10 will have better performance in the 240° direction. Therefore, if the electronic device 1 to which the antenna assembly 10 is applied is in scene two, the third antenna 140 in the antenna assembly 10 can be used to support the Bluetooth frequency band, or the antenna supporting the Bluetooth frequency band in the antenna assembly 10 can be switched from the first antenna 120 to the third antenna 140. Therefore, the antenna assembly 10 can realize the zero point compensation schematic diagram in the USB direction through intelligent switching. It should be noted that, usually, the USB port of the electronic device 1 is located at the bottom of the electronic device 1. In this embodiment, the electronic device 1 to which the antenna assembly 10 is applied includes a USB port as an example for simulation. If the electronic device 1 to which the antenna assembly 10 is applied does not include a USB port, the direction of the USB port is the bottom of the electronic device 1. When the electronic device 1 to which the antenna assembly 10 is applied does not include a USB port, it has no effect on the simulation results.

[0142] See also Fig.15 , Fig.15It is the isolation simulation curve of the first antenna, the second antenna and the third antenna in the antenna assembly. In this simulation diagram, the horizontal axis is the frequency, the unit is GHz; the vertical axis is the isolation, the unit is dB. Among them, curve ① is the isolation curve when the first antenna 120 and the second antenna 130 both support the Bluetooth frequency band (BT), marked as BT1&BT2 in the figure; curve ② is the isolation curve when the first antenna 120 and the third antenna 140 both support Bluetooth, marked as BT1&BT3 in the figure; curve ③ is the isolation curve when the first antenna 120 and the third antenna 140 both support Bluetooth, marked as BT2&BT3 in the figure. At 2.45GHz: the isolation between the first antenna 120 and the second antenna 130 is 17.662611; the isolation between the first antenna 120 and the third antenna 140 is -30.309401; the isolation between the second antenna 130 and the third antenna 140 is -30.515994. It can be seen that in the antenna assembly 10 of this embodiment, the first antenna 120 and the third antenna 140 have good isolation, and the second antenna 130 and the third antenna 140 have good isolation. This means that in extreme scenarios (for example, the scenarios 1 and 2 described above), it is more appropriate to select the third antenna 140 as an antenna that supports the Bluetooth frequency band, while the first antenna 120 and the second antenna 130 are both antennas that support the WiFi 2.4G frequency band. This BTC measurement can be used as a preferred strategy for scenarios 1 and 2.

[0143] In summary, in the antenna assembly 10 provided in the embodiment of the present application: in the first antenna 120, the first feed source S1 is electrically connected to the first radiator 121 to excite the first radiator 121 to generate a first current at least partially pointing to the second side 112 along the first side 111 (shown as rightward); in the second antenna 130, the second feed source S2 is electrically connected to the second radiator 131 to excite the second radiator 131 to generate a second current pointing from the bottom side 114 to the top side 113 (shown as upward); in the third antenna 140, the third feed source S3 is electrically connected to the third radiator 141 to excite the third radiator 141 to generate a third current pointing from the top side 113 to the bottom side 114. Therefore, the flow directions of the first current, the second current and the third current are different. When the antenna assembly 10 operates within the preset frequency range, the radiation directions of the first antenna 120, the second antenna 130 and the third antenna 140 are different, and the directional patterns can be complemented in free space, so that the antenna assembly 10 has better communication performance when supporting electromagnetic wave signals within the preset frequency band range.

[0144] In addition, in one embodiment, the one with the best signal quality among the first antenna 120 and the third antenna 140 is used to support the Bluetooth frequency band, thereby realizing BT one-to-one.

[0145] In addition, in one embodiment, the first antenna 120, the second antenna 130 and the third antenna 140 can all support the WiFi 2.4G frequency band, and one of the first antenna 120 and the third antenna 140 serves as the first channel of the WiFi 2.4G frequency band. The second antenna 130 serves as the second channel of the WiFi 2.4G frequency band, realizing the selection of two out of three WiFi 2.4G frequency bands. Among them, whether to select the first antenna 120 or the third antenna 140 to support the Bluetooth frequency band is determined according to the usage scenario based on the Bluetooth frequency band priority. In the extreme scenario when the electronic device 1 used by the antenna assembly 10 is put into the trouser pocket, the null pattern gain of the third antenna 140 is relatively large (more than 10dB).

[0146] In addition, in one embodiment, after the antenna supporting the Bluetooth frequency band and the antenna supporting the WiFi 2.4G frequency band are selected separately, the frequency division duplex (FDD) of the WiFi 2.4G frequency band 2×2 MIMO antenna + the Bluetooth frequency band 1×1 can be realized. The antenna assembly 10 can use both the WiFi 2.4G frequency band and the Bluetooth frequency band for communication, and has a better communication effect.

[0147] The embodiment of the present application also provides an electronic device 1. The electronic device 1 includes but is not limited to a mobile phone, a telephone, a television, a tablet computer (Pad), a camera, a personal computer, a notebook computer (Personal Computer, PC), a vehicle-mounted device, a headset, a watch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (Customer Premise Equipment, CPE) and other devices capable of transmitting and receiving electromagnetic wave signals.

[0148] The electronic device 1 includes an antenna assembly 10 as provided in any of the above embodiments. Fig.16 , Fig.16 1 is a three-dimensional schematic diagram of an electronic device provided in an embodiment. The electronic device 1 further includes a display screen 30, a middle frame 50 and a battery cover 70. The display screen 30 and the battery cover 70 are respectively arranged on opposite sides of the middle frame 50. The middle frame 50 and the battery cover 70 cooperate to form a receiving space. At least a portion of the antenna assembly 10 is received in the receiving space.

[0149] The electronic device 1 also includes a battery, functional devices (the functional devices may include one or more of a camera module, a microphone, a receiver, a speaker, a face recognition module, and a fingerprint recognition module) and other devices that can realize the basic functions of the mobile phone, which will not be described in detail in this embodiment. It can be understood that the above introduction to the electronic device 1 is only an explanation of an environment in which the antenna assembly 10 is used, and the specific structure of the electronic device 1 should not be understood as a limitation on the antenna assembly 10 provided in this application.

[0150] In one embodiment, the battery cover 70 is disposed on one side of the middle frame 50, and the appearance surface of the peripheral portion of the middle frame 50 or the appearance surface of the peripheral portion of the battery cover 70 constitutes at least a portion of the peripheral side surface of the electronic device 1. The appearance surface of the battery cover 70 facing away from the middle frame 50 constitutes at least a portion of the back surface of the electronic device 1.

[0151] In one implementation, the middle frame 50 in the electronic device 1 constitutes at least a portion of the ground plane 110 of the antenna assembly 10 .

[0152] The first side 111 and the second side 112 of the ground plane 110 in the antenna assembly 10 respectively correspond to two back-to-back frame settings in the electronic device 1, the top edge 113 of the ground plane 110 in the antenna assembly 10 corresponds to the top frame setting in the electronic device 1, and the bottom edge 114 of the ground plane 110 in the antenna assembly 10 corresponds to the bottom frame setting in the electronic device 1.

[0153] In one embodiment, the first side edge 111 and the second side edge 112 are arranged for two oppositely disposed frames of the electronic device 1 and are arranged corresponding to the longer frame of the electronic device 1. The top edge 113 and the bottom edge 114 are arranged corresponding to the shorter frame of the electronic device 1.

[0154] In the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application, the first radiator 121 of the first antenna 120 is excited to generate a first current pointing from the first side 111 to the second side 112, the second radiator 131 of the second antenna 130 is excited to generate a second current pointing from the bottom side 114 to the top side 113, and the second radiator 131 of the third antenna 140 is excited to generate a third current pointing from the top side 113 to the bottom side 114, so the flow directions of the first current, the second current and the third current are different. When the antenna assembly 10 operates in the preset frequency range, the main radiation directions of the first antenna 120, the second antenna 130 and the third antenna 140 are different, and the complementary directional patterns in free space can be achieved, so that the antenna assembly 10 in the electronic device 1 has better communication performance when supporting electromagnetic wave signals in the preset frequency band range.

[0155] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An antenna assembly, It is characterized in that The antenna assembly comprises: A ground plane, comprising a first side edge and a second side edge disposed opposite to each other, and a top edge and a bottom edge connected between the first side edge and the second side edge and opposite to each other; A first antenna, comprising a first radiator and a first feed source, wherein the first radiator is at least partially disposed on the top edge, and the first feed source is electrically connected to the first radiator; A second antenna comprises a second radiator and a second feed source, wherein the second radiator is disposed on the first side, and the second feed source is electrically connected to the second radiator; and The third antenna includes a third radiator and a third feed source, wherein the third radiator is at least partially arranged at one end of the second side edge adjacent to the top edge, and the third feed source is electrically connected to the third radiator; wherein the main radiation directions of the first antenna, the second antenna and the third antenna are different and can all support electromagnetic wave signals within a preset frequency range, and the preset frequency range includes a Bluetooth band or a WiFi 2.4G band.

2. The antenna assembly according to claim 1, It is characterized in that The main radiation direction of the first antenna is directed from the first side to the second side; The main radiation direction of the second antenna is from the bottom edge to the top edge; The main radiation direction of the third antenna is directed from the top edge to the bottom edge.

3. The antenna assembly according to claim 1, It is characterized in that The first radiator comprises a first ground end, a first free end and a first feeding point, the first ground end is electrically connected to the ground plane, the first feeding point is located between the first ground end and the first free end, and is electrically connected to the first feed source, and the first feed source excites the first radiator to generate a first current; The first current is a current corresponding to a quarter-wavelength mode flowing from the first feed source through the first feeding point to the first free end.

4. The antenna assembly according to claim 3, It is characterized in that The first radiator includes two radiating segments connected by bending, the first grounding end is located at one of the two radiating segments and is arranged corresponding to the first side edge; the first free end is located at the other of the two radiating segments and is arranged corresponding to the top edge.

5. The antenna assembly according to claim 3, It is characterized in that The second radiator is away from the top edge compared to the first radiator, and the second radiator includes: a first sub-radiator, the first sub-radiator comprising a second ground end, a second free end and a second feeding point, the second ground end being electrically connected to the ground plane, the second feeding point being located between the second ground end and the second free end and electrically connected to the second feed source, the second feed source exciting the second radiator to generate a second current; The second current is a current corresponding to a quarter-wavelength mode flowing from the second feed source through the second feeding point to the second free end.

6. The antenna assembly according to claim 5, It is characterized in that The second radiator further comprises: The second sub-radiator comprises a third free end and a third ground end, the third free end is opposite to the second free end and is spaced apart to form a first coupling gap, the second sub-radiator is coupled to the first sub-radiator through the first coupling gap, and the third ground end is grounded.

7. The antenna assembly according to claim 6, It is characterized in that The second antenna also supports at least one of an MHB band and an UHB band.

8. The antenna assembly according to claim 1, It is characterized in that The second radiator is disposed at an end of the first side edge adjacent to the top edge.

9. The antenna assembly according to claim 4, It is characterized in that The third radiator comprises: a third sub-radiator, the third sub-radiator comprising a fourth ground terminal, a fourth free terminal and a third feeding point, the fourth ground terminal being electrically connected to the ground plane, the third feeding point being located between the fourth ground terminal and the fourth free terminal and electrically connected to the third feed source; and a fourth sub-radiator, the fourth sub-radiator comprising a fifth free end and a fifth ground end, the fifth free end being opposite to the fourth free end and spaced apart to form a second coupling gap, the fourth sub-radiator being coupled to the third sub-radiator through the second coupling gap, and the fifth ground end being grounded; The third feed source excites the fourth sub-radiator to generate a third current, and the third current is a current corresponding to a quarter-wavelength mode from the fifth ground end to the fifth free end.

10. The antenna assembly according to claim 9, It is characterized in that The fourth grounding end is arranged at the bottom edge, the third sub-radiator includes two radiating segments connected by bending, the fourth free end is located at one of the two radiating segments and is arranged corresponding to the second side edge; the fourth grounding end is located at the other of the two radiating segments and is arranged corresponding to the second side edge, and the fourth grounding end is away from the bottom edge compared to the fourth free end.

11. The antenna assembly according to claim 9, It is characterized in that The third antenna also supports the LB frequency band.

12. A radio frequency system, It is characterized in that The radio frequency system comprises the antenna assembly as described in any one of claims 1-11.

13. The radio frequency system according to claim 12, It is characterized in that The first antenna, the second antenna and the third antenna can all support the WiFi 2.4G frequency band, and one of the first antenna and the third antenna serves as a working antenna of the first channel of the WiFi 2.4G frequency band; The second antenna is used as a working antenna of the second channel of the WiFi 2.4G frequency band to realize a 2×2 MIMO antenna of the WiFi 2.4G frequency band.

14. The radio frequency system according to claim 13, It is characterized in that The radio frequency system further includes a WCN WiFi module, a first LAN chip, a bidirectional coupler, a switch unit and a second LAN chip, wherein the WCN WiFi module is electrically connected to the first LAN chip and the bidirectional coupler to the switch unit in sequence, and the switch unit is also electrically connected to the first antenna and the third antenna, and the switch unit is used to electrically connect the first antenna and the second antenna to the WCN WiFi module; The WCN WiFi module is also electrically connected to the second LAN chip to the second antenna.

15. The radio frequency system according to claim 12, It is characterized in that The one with the best signal quality among the first antenna, the second antenna and the third antenna is used to support the Bluetooth frequency band, and the other two among the first antenna, the second antenna and the third antenna are used to support the WiFi 2.4G frequency band.

16. The radio frequency system according to claim 12, It is characterized in that The one with the best signal quality among the first antenna and the third antenna is used to support the Bluetooth frequency band, the other one of the first antenna and the third antenna is used to support the WiFi 2.4G frequency band, and the second antenna is used to support the WiFi 2.4G frequency band, so as to realize the FDD of WiFi 2.4G frequency band 2×2 MIMO antenna + Bluetooth frequency band 1×1.

17. The radio frequency system according to claim 12, It is characterized in that The second antenna is used to support the WiFi 2.4G frequency band; the best quality one of the first antenna and the third antenna is used to support the Bluetooth frequency band to achieve FDD of WiFi 2.4G frequency band 1×1+Bluetooth frequency band 1×1.

18. An electronic device, It is characterized in that The electronic device comprises the antenna assembly as described in any one of claims 1-11; or the electronic device comprises the radio frequency system as described in any one of claims 12-17.

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