Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment. The antenna assembly comprises a first antenna, and the first antenna comprises a first radiator, a first feed source and a switching circuit. The first radiating body comprises a first free end, a second free end, and a first feeding point, a grounding point and a connecting point which are positioned between the first free end and the second free end and are arranged in sequence; the first feed source is electrically connected to the first feed point to excite the first radiator to support a first target frequency band, and the first target frequency band comprises a first frequency band; the switching circuit is electrically connected to the connection point to adjust a directional diagram of a first frequency band supported by the first radiator, the switching circuit has a first state and a second state, when the switching circuit is in the first state and the second state, resonance current distribution of the first radiator is different, and when the switching circuit is in the first state, the first radiator has a first directional diagram in the first frequency band; when the switching circuit is in the second state, the first radiator has a second directional diagram in the first frequency band, and the first directional diagram and the second directional diagram are different.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna assembly 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 their functions are becoming more and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, the communication performance of antenna components in related technologies is not good enough and there is still room for improvement. Summary of the invention

[0003] In a first aspect, an embodiment of the present application provides an antenna assembly, wherein the antenna assembly includes a first antenna, and the first antenna includes:

[0004] a first radiator, the first radiator comprising a first free end and a second free end, and a first feeding point, a grounding point and a connection point located between the first free end and the second free end and arranged in sequence, the first feeding point being arranged closer to the first free end than the connection point, and the grounding point being grounded;

[0005] a first feed source electrically connected to the first feed point to excite the first radiator to support a first target frequency band, wherein the first target frequency band includes a first frequency band; and

[0006] a switch circuit electrically connected to the connection point;

[0007] In which, the switching circuit is used to adjust the radiation pattern of the first frequency band supported by the first radiator, and the switching circuit has a first state and a second state. When the switching circuit is in the first state, the resonant current of the first radiator is different from the resonant current distribution of the first radiator when the switching circuit is in the second state. When the switching circuit is in the first state, the first radiator has a first radiation pattern in the first frequency band; when the switching circuit is in the second state, the first radiator has a second radiation pattern in the first frequency band, wherein the first radiation pattern is different from the second radiation pattern.

[0008] In a second 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.

[0009] In summary, the antenna assembly provided in the embodiment of the present application includes a first antenna, a first radiator of the first antenna includes a first free end and a second free end, and a first feeding point, a grounding point and a connection point located between the first free end and the second free end and arranged in sequence, the first feeding point is arranged adjacent to the first free end compared to the connection point, the grounding point is grounded, the first feed source is electrically connected to the first feeding point, and the switch circuit is electrically connected to the connection point. It can be seen that by designing the positions of the grounding point and the first feeding point in the first radiator, the first feed source can excite the first radiator to support the first frequency band of the first target frequency band. In addition, by designing the position of the connection point in the first radiator, and the switch circuit is electrically connected to the connection point, and by controlling the state of the switch circuit, the switch circuit can be in the first state or the second state, and the resonant current of the first radiator when the switch circuit is in the first state is different from the resonant current distribution of the first radiator when the switch circuit is in the second state. When the switch circuit is in the first state, the first radiator has a first directional pattern in the first frequency band; when the switch circuit is in the second state, the first radiator has a second directional pattern in the first frequency band. The antenna assembly provided in the embodiment of the present application can realize the reconstruction of the directional pattern of a single antenna. In the first frequency band, the first directional pattern of the antenna assembly in the first state and the second directional pattern of the antenna assembly in the second state are different, and the directional patterns can be effectively formed to complement each other. In one embodiment, the area with a weak signal in the first directional pattern of the antenna assembly in the first state will be covered by the area with a strong signal in the directional pattern of the antenna assembly in the second state. Correspondingly, in the first frequency band, the area with a weak signal in the second directional pattern of the antenna assembly in the second state will be covered by the area with a strong signal in the first directional pattern of the antenna assembly in the first state. It can be seen that by adjusting the state of the switching circuit, the antenna assembly can have a better communication effect in the first frequency band, thereby improving the communication experience when the antenna assembly supports the first frequency band. It can be seen that the antenna assembly provided in the embodiment of the present application has a better communication effect in the first frequency band. In addition, since the reconstruction of the directional pattern of the first frequency band can be achieved using a single antenna assembly, it is not necessary to use multiple antenna assemblies to achieve the reconstruction of the directional pattern of the first frequency band. It can be seen that the antenna assembly provided in the embodiment of the present application is conducive to saving the cost of the antenna assembly and saving the space of the electronic device used by the antenna assembly. When the antenna assembly is applied to an electronic device, it is convenient to lay out the antenna assembly together with other components of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] 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.

[0011] Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0012] Figure 2 for Figure 1 An S11 parameter curve of the first antenna when the switch circuit of the antenna assembly shown in is in the first state;

[0013] Figure 3 for Figure 2 The system total efficiency and system radiation efficiency curves of the antenna assembly shown in;

[0014] Figure 4 for Figure 1 A schematic diagram showing another dimension of the antenna assembly shown;

[0015] Figure 5 for Figure 4 A schematic diagram of current flow in a first resonant mode in a first antenna of the antenna assembly shown;

[0016] Figure 6 for Figure 4 A schematic diagram of current flow in a second resonant mode in a first antenna of the antenna assembly shown;

[0017] Figure 7 for Figure 4 A schematic diagram of current flow in a third resonant mode in a first antenna of the antenna assembly shown;

[0018] Figure 8 For one embodiment Figure 1 A detailed schematic diagram of the antenna assembly shown in;

[0019] Fig. 9 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0020] Fig.10 for Fig. 9 A schematic diagram of current flow in a first resonant mode in a first antenna of the antenna assembly shown;

[0021] Fig.11 for Fig. 9 A simulation diagram of current flow in a first resonant mode in a first antenna of the antenna assembly shown;

[0022] Fig.12 for Fig. 9 A schematic diagram of current flow in a second resonant mode in a first antenna of the antenna assembly shown;

[0023] Fig.13 for Fig. 9 A simulation diagram of current flow in a second resonant mode in a first antenna of the antenna assembly shown;

[0024] Fig.14 for Fig. 9 A schematic diagram of current flow in a third resonant mode in a first antenna of the antenna assembly shown;

[0025] Fig.15 for Fig. 9 A simulation diagram of current flow in the third resonant mode in the first antenna of the antenna assembly shown;

[0026] Fig.16 for Fig. 9 A rear view of the antenna assembly shown in FIG. 1 in a vertical position when applied to an electronic device;

[0027] Fig.17 for Fig.16 A schematic diagram of a portion of the structure of the antenna assembly shown in FIG. 1 when applied to an electronic device;

[0028] Fig.18 for Fig. 9 A schematic diagram of the resonant current distribution when the switch of the first antenna in the antenna assembly shown in is in an off state and supports the first frequency band;

[0029] Fig.19 for Fig. 9 A directional pattern when a switch of the first antenna in the antenna assembly shown in is in an off state and supports a first frequency band;

[0030] Fig. 20 for Fig. 9 A schematic diagram of the resonant current distribution when the switch of the first antenna in the antenna assembly shown in is in a closed state and supports the first frequency band;

[0031] Fig.21 for Fig. 9 A directional pattern when a switch of the first antenna in the antenna assembly shown in is in a closed state and supports a first frequency band;

[0032] Fig. 22 for Fig. 9 When the antenna assembly shown in the figure is applied to an electronic device, the switch of the first antenna is in an off state and supports a directional pattern of a first frequency band;

[0033] Fig.23 for Fig. 9 When the antenna assembly shown in the figure is applied to an electronic device, the switch of the first antenna is in a closed state and supports a directional pattern of a first frequency band;

[0034] Fig.24 supporting a two-dimensional directional pattern of a first frequency band for a first antenna of the antenna assembly;

[0035] Fig.25 is a system radiation efficiency curve of an antenna assembly including a first resonance circuit and an antenna assembly not including the first resonance circuit;

[0036] Fig.26 for Fig. 9 The total system efficiency curve of the second antenna when the switch of the provided antenna assembly is closed and opened;

[0037] Fig. 27 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0038] Fig.28 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0039] Fig.29 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0040] Fig.30 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0041] Fig.31 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0042] Fig.32 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0043] Fig.33 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0044] Fig.34 A schematic diagram of an electronic device provided in one embodiment of the present application;

[0045] Fig.35 for Fig.34 A schematic diagram of a portion of the structure of an electronic device;

[0046] Fig.36 A circuit block diagram of an electronic device provided in accordance with one embodiment of the present application.

[0047] Description of main component numbers:

[0048] Electronic device 1, first side 1a, second side 1b;

[0049] Antenna assembly 10, middle frame 30, processor 50, display screen 70, housing 90;

[0050] First antenna 100, first radiator 110, first branch 111, second branch 112, first free end 111a, connection point P0, first feeding point P1, grounding point G0, second free end 112a, first feed source S1;

[0051] Switch circuit 120, first capacitor C01, first inductor L01, second inductor L02, switch 121, first connection terminal 121a, second connection terminal 121b, third connection terminal 121c, fourth connection terminal 121d, common terminal 121e;

[0052] A first resonant circuit 130, a first resonant inductor L11, and a first resonant capacitor C11;

[0053] A second resonant circuit 140, a second resonant inductor L22, and a second resonant capacitor C22;

[0054] The second antenna 200, the second radiator 210, the third free end 210a, the second feeding point P2, the ground end 210b, and the second feed source S2;

[0055] A first resonant current I1, a second resonant current I2, and a third resonant current I3;

[0056] Frame body 310 and frame 320 . DETAILED DESCRIPTION

[0057] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0058] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0059] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0060] See also Figure 1 , Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application. The antenna assembly 10 includes a first antenna 100. The first antenna 100 includes a first radiator 110, a first feed source S1, and a switch circuit 120. The first radiator 110 includes a first free end 111a and a second free end 112a, and a first feed point P1, a ground point G0, and a connection point P0 sequentially arranged between the first free end 111a and the second free end 112a. The first feed point P1 is closer to the first free end 111a than the connection point P0, and the ground point G0 is grounded. The first feed source S1 is electrically connected to the first feed point P1 to excite the first radiator 110 to support a first target frequency band, and the first target frequency band includes a first frequency band. The switch circuit 120 is electrically connected to the connection point P0. The switch circuit 120 is used to adjust the directional pattern of the first frequency band supported by the first radiator 110, and the switch circuit 120 has a first state and a second state. When the switch circuit 120 is in the first state, the resonant current of the first radiator 110 has a different distribution from the resonant current of the first radiator 110 when the switch circuit 120 is in the second state. When the switch circuit 120 is in the first state, the first radiator 110 has a first directivity pattern in the first frequency band. When the switch circuit 120 is in the second state, the first radiator 110 has a second directivity pattern in the first frequency band. The first directivity pattern is different from the second directivity pattern.

[0061] The first radiator 110 may 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. Figure 34 to Figure 36), the first radiator 110 may be a mechanical design antenna (MDA) radiator designed using the metal of the electronic device 1 itself. For example, the first radiator 110 may be an antenna radiator designed using the middle frame 30 formed of plastic and metal of the electronic device 1. In addition, the first radiator 110 may also be a metal frame radiator designed using the metal middle frame 30.

[0062] The grounding point G0 may be grounded in a manner that is not limited to being electrically connected to the ground electrode (also referred to as the floor) of the electronic device 1 through a ground feeder (such as a conductive spring, conductive glue, or conductive screw, etc.). The ground electrode of the electronic device 1 may be, but is not limited to, the ground formed by the middle frame 30, or the ground in the circuit board, or the ground of the shielding member of the display screen 70 of the electronic device 1, or the ground of the housing 90.

[0063] Since the first radiator 110 has a first free end 111a, a second free end 112a and a grounding point G0, the grounding point G0 is located between the first free end 111a and the second free end 112a, and the grounding point G0 is grounded, the shape of the first radiator 110 is similar to a T shape, and the first radiator 110 is also called a T-shaped radiator, or a T-shaped branch, or a T branch.

[0064] The first feed source S1 may be electrically connected to the first feed point P1 by, but is not limited to, being electrically connected to the first feed point P1 through a feeding member (such as a conductive spring, conductive glue, or conductive screw, etc.).

[0065] When the switch circuit 120 is in the first state, the resonant current of the first radiator 110 is different from the resonant circuit distribution of the first radiator 110 when the switch circuit 120 is in the second state. Therefore, the first directivity pattern is different from the second directivity pattern. The first directivity pattern is different from the second directivity pattern, including but not limited to, the main beam direction in the first directivity pattern is different from the main beam direction in the second directivity pattern.

[0066] The switch circuit 120 will be described in detail later in conjunction with different implementations of the switch circuit 120 in the antenna assembly 10 .

[0067] In this embodiment, the range of the first target frequency band can be but is not limited to 1.7 GHz to 2.7 GHz. The first target frequency band can cover the middle and high frequency (Middle High Band, MHB) band and the WiFi 2.4G band. In this embodiment, the first target frequency band is the WiFi2.4G band. It can be understood that the frequency band range of the first target frequency band and the frequency band range of the first frequency band are only an example. In other embodiments, the frequency band range of the first target frequency band and the frequency band range of the first frequency band may also be other ranges.

[0068] In summary, the antenna component 10 provided in the embodiment of the present application includes a first antenna 100, and the first radiator 110 of the first antenna 100 includes a first free end 111a and a second free end 112a, and a first feeding point P1, a grounding point G0 and a connection point P0 located between the first free end 111a and the second free end 112a and arranged in sequence, the first feeding point P1 is arranged closer to the first free end than the connection point P0, the grounding point G0 is grounded, the first feed source S1 is electrically connected to the first feeding point P1, and the switching circuit 120 is electrically connected to the connection point P0. It can be seen that by designing the positions of the grounding point G0 and the first feeding point P1 in the first radiator 110, the first feed source S1 can excite the first radiator 110 to support the first frequency band of the first target frequency band. In addition, by designing the position of the connection point P0 in the first radiator 110, and the switch circuit 120 is electrically connected to the connection point P0, and by controlling the state of the switch circuit 120, the switch circuit 120 can be in the first state or the second state, and the resonant current of the first radiator 110 when the switch circuit 120 is in the first state is different from the resonant current distribution of the first radiator 110 when the switch circuit 120 is in the second state. When the switch circuit 120 is in the first state, the first radiator 110 has a first directional pattern in the first frequency band; when the switch circuit 120 is in the second state, the first radiator 110 has a second directional pattern in the first frequency band. The antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna. When supporting the first frequency band, the first directional pattern of the antenna assembly 10 in the first state and the second directional pattern of the antenna assembly 10 in the second state are different, and the directional pattern complementation can be effectively formed. In one embodiment, the area with a weak signal in the first directional pattern of the antenna assembly 10 in the first state will be covered by the area with a strong signal in the directional pattern of the antenna assembly 10 in the second state. Accordingly, when supporting the first frequency band, the area with a weaker signal in the second directional pattern of the antenna component 10 in the second state will be covered by the area with a stronger signal in the first directional pattern of the antenna component 10 in the first state. It can be seen that by adjusting the state of the switching circuit 120, the antenna component 10 can have a better communication effect in the first frequency band, thereby improving the communication experience when the antenna component 10 supports the first frequency band. It can be seen that the antenna component 10 provided in the embodiment of the present application has a better communication effect in the first frequency band. In addition, since the reconstruction of the directional pattern of the first frequency band can be achieved using a single antenna component 10, there is no need to use multiple antenna components 10 to achieve the reconstruction of the directional pattern of the first frequency band.It can be seen that the antenna assembly 10 provided in the embodiment of the present application is conducive to saving the cost of the antenna assembly 10 and saving the space of the electronic device 1 to which the antenna assembly 10 is applied. When the antenna assembly 10 is applied to the electronic device 1, it is convenient to layout it in the electronic device 1 together with other components of the electronic device 1.

[0069] See also Figure 2 , Figure 2 for Figure 1 The S11 parameter curve of the first antenna when the switch circuit of the antenna assembly shown in is in the first state. The first feed source S1 excites the first radiator 110 to generate a first resonant mode, a second resonant mode and a third resonant mode to support the first target frequency band. Wherein, the first resonant mode is different from the second resonant mode. The first resonant mode corresponds to the first resonant frequency point f1, the second resonant mode corresponds to the second resonant frequency point f2, and the third resonant mode corresponds to the third resonant frequency point f3, where f1<f2<f3. When the switch circuit 120 is in the first state, the first resonant mode supports the first frequency band, and the first frequency band supported by the first radiator 110 has a first directivity pattern.

[0070] In the simulation diagram of this embodiment, the horizontal axis is frequency, the unit is GHz, and the vertical axis is S-Parameters, the unit is dB. It can be seen from this simulation diagram that the first feed source S1 has three resonance modes when exciting the first radiator 110. According to the resonance frequency from small to large, these three resonance modes are named the first resonance mode, the second resonance mode and the third resonance mode. In this embodiment, the first resonance frequency f1 of the first resonance mode is shown in FIG. Figure 2 Point 5 in the figure, the second resonant frequency f2 of the second resonant mode can be found in Figure 2 Point 2 in the figure, the third resonant frequency f3 of the third resonant mode can be found in Figure 2 Point 6 in FIG. 1 . The -4dB bandwidth can cover 1.7 GHz to 2.7 GHz. Therefore, in this embodiment, the range of the first target frequency band is 1.7 GHz to 2.7 GHz, including the MHB frequency band and the WiFi 2.4G frequency band.

[0071] When the switch circuit 120 is in the first state, the first resonance mode supports the first frequency band; when the switch circuit 120 is in the second state, the second resonance mode supports the second frequency band. Since the first resonance mode is different from the second resonance mode, the resonant current distribution of the first radiator 110 when the switch circuit 120 of the antenna component 10 is in the first state is different from the resonant current distribution of the first radiator 110 when the switch circuit 120 of the antenna component 10 is in the second state. As a result, when the switch circuit 120 is in the first state, the first frequency band has a first directional pattern; when the switch circuit 120 is in the second state, the first frequency band has a second directional pattern, and the first directional pattern is different from the second directional pattern. The antenna component 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna.

[0072] See also Figure 3 , Figure 3 for Figure 2 The system total efficiency and system radiation efficiency curve of the antenna assembly shown in . For the convenience of illustration, Figure 3 (a) is a color image. Figure 3 (b) in Figure 3 In the schematic diagram of this embodiment, curve ① (corresponding to Figure 3 The blue curve in (a) is the system radiation efficiency (SystemRad.Efficiency) curve of the first antenna 100, and curve ② (corresponding to Figure 3 The yellow curve in (a) is a system total efficiency curve (System Tot. Efficiency) of the first antenna 100. It can be seen that the first antenna 100 has a good system radiation efficiency and a good system total efficiency in the first target frequency band.

[0073] Next, the first resonance mode, the second resonance mode and the third resonance mode are described in detail. Figure 1 , Figure 4 , Figure 4 for Figure 1 Another dimension of the antenna assembly is shown in FIG. The first radiator 110 includes a first branch 111 and a second branch 112. The first branch 111 includes a portion of the first radiator 110 located between the first free end 111a and the grounding point G0. The second branch 112 includes a portion of the first radiator 110 located between the second free end 112a and the grounding point G0.

[0074] See also Figure 5 , Figure 5 for Figure 4The schematic diagram of current flow direction of the first resonant mode in the first antenna of the antenna assembly is shown. The first resonant mode is a quarter wavelength mode of the first branch 111 .

[0075] For the convenience of description, the resonant current corresponding to the first resonant mode is named as the first resonant current I1. The first resonant mode is a quarter-wavelength mode of the first branch 111. Specifically, the first branch 111 supports the first resonant mode. Since the first branch 111 includes the portion of the first radiator 110 between the first free end 111a and the grounding point G0, the first branch 111 can be regarded as an inverted-F antenna (IFA) radiator, and the first resonant mode can also be called a quarter-wavelength IFA mode.

[0076] The first resonant current I1 corresponding to the first resonant mode is distributed in the first branch 111. In the current half-wavelength period shown in the schematic diagram of this embodiment, the first resonant current I1 flows from the ground point G0 to the first free end 111a. It can be understood that the first resonant current I1 is periodic, and in the next half-wavelength period, the first resonant current I1 flows from the first free end 111a to the ground point G0.

[0077] It should be noted that the “wavelength” in the first resonance mode being the quarter-wavelength mode of the first branch 111 is the wavelength corresponding to the center frequency (also called the center frequency point) of the frequency band corresponding to the first resonance mode.

[0078] A quarter-wavelength mode, also known as a fundamental mode, has a higher radiation efficiency in the frequency band supported by the fundamental mode. In this embodiment, when the antenna component 10 is in the first state, the feed source S excites the first resonant mode of the radiator 110 to support a portion of the first target frequency band, wherein the first resonant mode is a quarter-wavelength mode of the first branch 111. Therefore, when the antenna component 10 is in the first state, the antenna component 10 has a higher radiation efficiency in the first resonant mode to support the portion of the first target frequency band.

[0079] See also Figure 6 , Figure 6 for Figure 4 The schematic diagram of the current flow direction of the second resonance mode in the first antenna of the antenna assembly is shown. The second resonance mode is a half-wavelength dipole mode of the first radiator 110.

[0080] For the convenience of description, the resonant current corresponding to the second resonant mode is named as the second resonant current I2. The second resonant mode is a half-wavelength dipole mode of the entire branch of the first radiator 110. In this embodiment, the second resonant mode is also called a half-wavelength mode of the first radiator 110, or a balanced mode.

[0081] The second resonant current I2 corresponding to the second resonant mode is distributed in the first radiator 110. In the current half-wavelength period shown in the schematic diagram of this embodiment, the second resonant current I2 flows from the second free end 112a to the first free end 111a. It can be understood that the second resonant current I2 is periodic, and in the next half-wavelength period, the second resonant current I2 flows from the first free end 111a to the second free end 112a.

[0082] It should be noted that the “wavelength” in the half-wavelength dipole mode of the entire branch of the second resonant mode is the wavelength corresponding to the center frequency (also called the center frequency point) of the frequency band corresponding to the second resonant mode.

[0083] It can be seen that in the antenna assembly 10 provided in the embodiment of the present application, the first resonant current I1 corresponding to the first resonant mode and the second resonant current I2 corresponding to the second resonant mode have different distributions in the first radiator 110 .

[0084] Therefore, when the switch circuit 120 is in the first state, the first resonant mode supports the first frequency band, and the first frequency band has a first directional pattern; when the switch circuit 120 is in the second state, the second resonant mode supports the first frequency band, and the first frequency band has a second directional pattern. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna.

[0085] See also Figure 7 , Figure 7 for Figure 4 The schematic diagram of the current flow direction of the third resonance mode in the first antenna of the antenna assembly is shown. The third resonance mode is a quarter wavelength mode of the second branch 112.

[0086] For the convenience of description, the resonant current corresponding to the third resonant mode is named as the third resonant current I3. The third resonant mode is a quarter-wavelength mode of the second branch 112. Specifically, the second branch 112 supports the third resonant mode. Since the second branch 112 includes a portion of the first radiator 110 between the second free end 112a and the grounding point G0, the second branch 112 can be regarded as an IFA antenna radiator, and the third resonant mode can also be called a quarter-wavelength IFA mode.

[0087] The third resonant current I3 corresponding to the third resonant mode is distributed in the second branch 112. In the current half-wavelength period shown in the schematic diagram of this embodiment, the third resonant current I3 flows from the ground point G0 to the second free end 112a. It can be understood that the third resonant current I3 is periodic, and in the next half-wavelength period, the third resonant current I3 flows from the second free end 112a to the ground point G0.

[0088] It should be noted that the “wavelength” in the quarter-wavelength mode of the second branch 112 in the third resonance mode is the wavelength corresponding to the center frequency (also called the center frequency point) of the frequency band corresponding to the third resonance mode.

[0089] The quarter-wavelength mode is also called the fundamental mode. The frequency band supported by the fundamental mode has higher radiation efficiency. Therefore, the antenna component 10 is a quarter-wavelength mode of the second branch 112 in the third resonant mode, and the third resonant mode supports a part of the first target frequency band to have higher radiation efficiency.

[0090] In this embodiment, the first resonance mode corresponds to the first resonance frequency f1, the second resonance mode corresponds to the second resonance frequency f2, and the third resonance mode corresponds to the third resonance frequency f3, wherein f1<f2<f3. In one embodiment, the length of the first branch 111 is less than the length of the second branch 112 (that is, the length of the second branch 112 is greater than the length of the first branch 111), so that the first resonance frequency f1 corresponding to the first resonance mode supported by the first branch 111 can be made smaller than the third resonance frequency f3 corresponding to the third resonance mode supported by the second branch 112 without using more complex matching or even matching in the first antenna 100.

[0091] It can be understood that in other embodiments, the length of the first branch 111 may also be equal to the length of the second branch 112, or the length of the first branch 111 may also be greater than the length of the second branch 112 (that is, the length of the second branch 112 is less than the length of the first branch 111); in this case, a matching circuit needs to be set in the first antenna 100 to adjust the equivalent electrical length of the first branch 111 and adjust the equivalent length of the second branch 112, so that the equivalent electrical length of the first branch 111 matches the frequency band corresponding to the first resonant mode supported by the first branch 111, and the equivalent electrical length of the second branch 112 matches the frequency band corresponding to the third resonant mode supported by the second branch 112. In other words, in the other embodiments, the length of the first branch 111 is equal to or greater than the length of the second branch 112 (that is, the length of the second branch 112 is less than or equal to the length of the first branch 111), and the first antenna 100 includes a matching circuit to adjust the equivalent electrical length of the first branch 111 and adjust the equivalent electrical length of the second branch 112 so that the first resonant frequency point f1 corresponding to the first resonant mode supported by the first branch 111 is less than the third resonant frequency point f3 corresponding to the third resonant mode supported by the second branch 112.

[0092] Further, in this implementation, the first target frequency band also includes a second frequency band.

[0093] The first target frequency band includes a first frequency band and a second frequency band, so the antenna assembly 10 can not only meet the communication function of the first frequency band, but also meet the communication function of the second frequency band. In addition, the first antenna 100 can meet the communication requirements of the first frequency band and the second frequency band with one antenna, and the number of antennas required is small. Therefore, the first antenna 100 has a small volume, and the antenna assembly 10 is arranged with other devices in the electronic device 1.

[0094] Further, in this implementation, the first frequency band includes a WiFi 2.4G frequency band, and the second frequency band includes an MHB frequency band.

[0095] When the first frequency band includes the WiFi 2.4G frequency band, and the second frequency band includes the MHB frequency band, the first antenna 100 of the antenna assembly 10 can not only meet the communication function of the WiFi 2.4G frequency band, but also meet the communication function of the MHB frequency band.

[0096] See also Figure 8 , Figure 8 For one embodiment Figure 1Detailed schematic diagram of the antenna assembly shown in . In this embodiment, the switch circuit 120 includes a first inductor L01 and a switch 121. One end of the first inductor L01 is grounded. The switch 121 includes a first connection end 121a and a second connection end 121b. The first connection end 121a is electrically connected to the other end of the first inductor L01, and the second connection end 121b is electrically connected to the connection point P0. When the first connection end 121a and the second connection end 121b are electrically connected, the switch circuit 120 is in the first state. When the first connection end 121a and the second connection end 121b are disconnected, the switch circuit 120 is in the second state.

[0097] The switch 121 includes a first connection end 121a and a second connection end 121b, wherein the first connection end 121a is electrically connected to the other end of the first inductor L01, and the second connection end 121b is electrically connected to the connection point P0. When the first switch 121 is disconnected, the first connection end 121a and the second connection end 121b are disconnected, and the first inductor L01 and the connection point P0 are disconnected. When the first switch 121 is turned on (also referred to as when the first switch 121 is closed), the first connection end 121a and the second connection end 121b are electrically connected, and the first inductor L01 is electrically connected to the connection point P0. It can be seen that in the antenna assembly 10 provided in the embodiment of the present application, when the first switch 121 is disconnected, the connection relationship between the first radiator 110 and the first inductor L01 is different from that when the first switch 121 is turned on.

[0098] In this embodiment, when the first connection end 121a is electrically connected to the second connection end 121b, the switch circuit 120 is in the first state; when the first connection end 121a is disconnected from the second connection end 121b, the switch circuit 120 is in the second state; thus, by controlling the state of the switch 121, the resonant current of the first radiator 110 when the switch circuit 120 is in the first state can be different from the resonant current distribution of the first radiator 110 when the switch circuit 120 is in the second state. Thus, when the switch circuit 120 is in the first state, the first frequency band has a first directional pattern; when the switch circuit 120 is in the second state, the first frequency band has a second directional pattern. The antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna.

[0099] In addition, the switch circuit 120 includes a first inductor L01 and a switch 121 . By controlling the state of the switch 121 , the directivity pattern of the first frequency band supported by the first antenna 100 can be controlled.

[0100] See also Fig. 9 , Fig. 9 A schematic diagram of an antenna assembly provided for another embodiment of the present application. In this embodiment, the antenna assembly 10 includes a first antenna 100, and the first antenna 100 includes a first radiator 110, a first feed source S1, and a switch circuit 120. The first radiator 110, the first feed source S1, and the switch circuit 120 in the first antenna 100 refer to the previous description and are not repeated here. The antenna assembly 10 also includes a second antenna 200. The second antenna 200 includes a second radiator 210 and a second feed source S2. The second radiator 210 includes a third free end 210a, a second feed point P2, and a grounding end 210b arranged in sequence. The grounding end 210b is grounded, wherein the second free end 112a is arranged adjacent to the third free end 210a compared to the first free end 111a. The second feed source S2 is electrically connected to the second feed point P2 to excite the second radiator 210 to support a second target frequency band, and the second target frequency band includes a third frequency band. The first antenna 100 also includes a first resonant circuit 130. One end of the first resonant circuit 130 is grounded, and the other end is electrically connected to the connection point P0. The first resonant circuit 130 includes a first resonant inductor L11 and a first resonant capacitor C11 connected in series. The first resonant circuit 130 resonates in the third frequency band.

[0101] The second radiator 210 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 second radiator 210 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the second radiator 210 can be an antenna radiator designed using the middle frame 30 formed of plastic and metal of the electronic device 1. In addition, the second radiator 210 can also be a metal frame 320 radiator designed from a metal middle frame 30.

[0102] The grounding method of the grounding terminal 210b may be, but is not limited to, electrically connected to the ground electrode (also referred to as the floor) of the electronic device 1 through a ground feeding member (such as a conductive spring, or conductive glue, or conductive screw, etc.). The ground electrode of the electronic device 1 may be, but is not limited to, the ground formed by the middle frame 30, or the ground in the circuit board, or the ground of the shielding member of the display screen 70 of the electronic device 1, or the ground of the housing 90.

[0103] Since the second radiator 210 includes a third free end 210a, a second feeding point P2 and a ground end 210b which are sequentially arranged, and the ground end 210b is grounded, the second radiator 210 is also called an IFA radiator.

[0104] The second feed source S2 may be electrically connected to the second feed point P2 by, but is not limited to, being electrically connected to the second feed point P2 via a feeding member (such as a conductive spring, conductive glue, or conductive screw, etc.).

[0105] In this embodiment, the first antenna 100 includes a first resonant circuit 130, one end of the first resonant circuit 130 is grounded, and the other end is electrically connected to the connection point P0. The first resonant circuit 130 resonates in the third frequency band. Therefore, the influence of the third frequency band supported by the second radiator 210 on the first target frequency band supported by the first radiator 110 can be reduced.

[0106] In addition, the antenna assembly 10 provided in this embodiment, the first antenna 100 includes a first resonant circuit 130, and the system radiation efficiency of the third frequency band of the second target frequency band supported by the second frequency band can also be improved. Specifically, for the second antenna 200, the first radiator 110 of the first antenna 100 couples the energy of the second radiator 210 of the second antenna 200, and the first resonant circuit 130 resonates in the third frequency band. Therefore, the first radiator 110 cannot generate a high-order mode. If the first radiator 110 couples the energy of the second radiator 210 to generate a high-order mode, the system radiation efficiency of the third frequency band of the second target frequency band will be reduced. It can be seen that the antenna assembly 10 provided in the embodiment of the present application, the first antenna 100 includes a first resonant circuit 130, and the first resonant circuit 130 resonates in the third frequency band, can improve the system radiation efficiency of the third frequency band. This will be explained later in conjunction with the simulation diagram.

[0107] In addition, the first resonant circuit 130 includes a first resonant inductor L11 and a first resonant capacitor C11 connected in series. The structure of the first resonant circuit 130 is simple and easy to implement.

[0108] In one embodiment, the third frequency band includes the N78 frequency band. Thus, the second antenna 200 of the antenna assembly 10 can meet the communication requirements of the N78 frequency band.

[0109] Furthermore, in one implementation, the second target frequency band also includes a fourth frequency band.

[0110] It can be seen that the second antenna 200 of the antenna assembly 10 can not only support the third frequency band, but also support the fourth frequency band, and can meet the communication requirements of the third frequency band and the fourth frequency band. In addition, the second antenna 200 can achieve the communication requirements of the third frequency band and the fourth frequency band with one antenna, and the number of antennas required is small. Therefore, the second antenna 200 has a small volume, and the antenna assembly 10 is arranged with other devices in the electronic device 1.

[0111] In one embodiment, the third frequency band includes the N78 frequency band, and the fourth frequency band includes the WiFi 5G frequency band.

[0112] When the third frequency band includes the N78 frequency band and the fourth frequency band includes the WiFi 5G frequency band, the second antenna 200 of the antenna assembly 10 can not only meet the communication function of the N78 frequency band, but also meet the communication function of the WiFi 5G frequency band.

[0113] The frequency of the N79 frequency band is close to that of the WiFi 5GP frequency band, so in one embodiment, the fourth frequency band may also be the N79 frequency band. In this way, the second antenna 200 can meet the communication requirements of the N79 frequency band.

[0114] Next, the opening and closing of the switch 121 in the first antenna 100 are described in detail. As described above, when the first connection end 121a of the switch 121 is disconnected from the second connection end 121b, the switch 121 is opened; when the first connection end 121a of the switch 121 is electrically connected to the second connection end 121b, the switch 121 is closed (also referred to as the switch 121 is turned on).

[0115] The situation when the switch 121 in the first antenna 100 is disconnected is described as follows. When the switch 121 is disconnected, the first resonant circuit 130 resonates in the third frequency band, and therefore, for the third frequency band, the first resonant circuit 130 is equivalent to being grounded. In this way, the first antenna 100 including the first resonant circuit 130 can be equivalent to blocking the opening of the second branch 112 to ensure the performance of the third frequency band. However, for the first target frequency band supported by the first antenna 100, the first resonant circuit 130 is equivalent to a small capacitor, and the first resonant circuit 130 has little or no effect on the first target frequency band supported by the first antenna 100.

[0116] Specifically, when the first target frequency band includes the first frequency band and the second frequency band, and the first frequency band includes the WiFi 2.4G frequency band, and the second frequency band includes the MHB frequency band; the second target frequency band includes the third frequency band, and the third target frequency band includes the N78 frequency band; when the switch 121 in the first antenna 100 is disconnected, for the N78 frequency band, the first resonant circuit 130 is equivalent to grounding. In this way, the first antenna 100 includes the first resonant circuit 130, which is equivalent to blocking the opening of the second branch 112 to ensure the performance of the N78 frequency band. However, for the WiFi 2.4G frequency band and the MHB frequency band supported by the first antenna 100, the first resonant circuit 130 is equivalent to a small capacitor, and the first resonant circuit 130 has little or no effect on the WiFi 2.4G frequency band and the MHB frequency band supported by the first antenna 100.

[0117] The situation when the switch 121 in the first antenna 100 is closed is described as follows. When the switch 121 is closed, it is equivalent to connecting the first inductor L01 in parallel on the basis of the first resonant circuit 130. Therefore, the first resonant circuit 130 and the switch circuit 120 are equivalent to a parallel circuit of an inductor and a capacitor (also called an LC parallel circuit). The first resonant circuit 130 and the switch circuit 120 are equivalent to an inductor for the first and second frequency bands in the first target frequency band, and are equivalent to a capacitor for the third frequency band supported by the second antenna 200. The effect is similar to a short circuit. Therefore, when the switch 121 in the first antenna 100 is closed, the performance of the second antenna 200 is almost not affected.

[0118] Specifically, when the first target frequency band includes the first frequency band and the second frequency band, and the first frequency band includes the WiFi 2.4G frequency band, and the second frequency band includes the MHB frequency band; the second target frequency band includes the third frequency band, and the third target frequency band includes the N78 frequency band; when the switch 121 in the first antenna 100 is closed, the resonant frequency of the parallel circuit equivalent to the first resonant circuit 130 and the switch circuit 120 is slightly lower than the N78 frequency band and higher than the N41 frequency band. Therefore, the parallel circuit equivalent to the first resonant circuit 130 and the switch circuit 120 is equivalent to an inductor for the WiFi 2.4G frequency band and the MHB frequency band, and is equivalent to a capacitor for the N78 frequency band, and the effect is similar to a short circuit. Therefore, when the switch 121 in the first antenna 100 is closed, the performance of the second antenna 200 is almost not affected.

[0119] Next, the antenna assembly 10 provided in the embodiment of the present application is introduced and simulated. It should be noted that, for a clearer illustration, the following figures involving simulation diagrams are illustrated as two diagrams in the same figure, where (a) is a color diagram and (b) is a grayscale diagram of (a) in the same figure.

[0120] See also Fig. 9 , Fig.10 and Fig.11 , Fig.10 for Fig. 9 A schematic diagram of current flow in a first resonant mode in a first antenna of the antenna assembly shown; Fig.11 for Fig. 9 The current flow simulation diagram of the first resonant mode in the first antenna of the antenna assembly shown. The first radiator 110 includes a first branch 111 and a second branch 112. The first branch 111 includes a portion of the first radiator 110 located between the first free end 111a and the grounding point G0. The second branch 112 includes a portion of the first radiator 110 located between the second free end 112a and the grounding point G0.

[0121] For the convenience of description, the resonant current corresponding to the first resonant mode is named as the first resonant current I1. The first resonant mode is a quarter-wavelength mode of the first branch 111. Specifically, the first branch 111 supports the first resonant mode. Since the first branch 111 includes the portion of the first radiator 110 between the first free end 111a and the grounding point G0, the first branch 111 can be regarded as an IFA antenna radiator, and the first resonant mode can also be called a quarter-wavelength IFA mode.

[0122] The first resonant current I1 corresponding to the first resonant mode is distributed in the first branch 111. In the current half-wavelength period shown in the schematic diagram of this embodiment, the first resonant current I1 flows from the ground point G0 to the first free end 111a. It can be understood that the first resonant current I1 is periodic, and in the next half-wavelength period, the first resonant current I1 flows from the first free end 111a to the ground point G0.

[0123] See also Fig. 9 , Fig.12 and Fig.13 , Fig.12 for Fig. 9 A schematic diagram of current flow in a second resonant mode in a first antenna of the antenna assembly shown; Fig.13 for Fig. 9The current flow simulation diagram of the second resonant mode in the first antenna of the antenna assembly shown in the figure is a half-wavelength dipole mode of the first radiator 110.

[0124] For the convenience of description, the resonant current corresponding to the second resonant mode is named as the second resonant current I2. The second resonant mode is a half-wavelength dipole mode of the entire branch of the first radiator 110. In this embodiment, the second resonant mode is also called a half-wavelength mode of the first radiator 110, or a balanced mode.

[0125] The second resonant current I2 corresponding to the second resonant mode is distributed in the first radiator 110. In the current half-wavelength period shown in the schematic diagram of this embodiment, the second resonant current I2 flows from the second free end 112a to the first free end 111a. It can be understood that the second resonant current I2 is periodic, and in the next half-wavelength period, the second resonant current I2 flows from the first free end 111a to the second free end 112a.

[0126] See also Fig. 9 , Fig.14 and Fig.15 , Fig.14 for Fig. 9 A schematic diagram of current flow in a third resonant mode in a first antenna of the antenna assembly shown; Fig.15 for Fig. 9 The current flow simulation diagram of the third resonant mode in the first antenna of the antenna assembly is shown. The third resonant mode is a quarter wavelength mode of the second branch 112.

[0127] For the convenience of description, the resonant current corresponding to the third resonant mode is named as the third resonant current I3. The third resonant mode is a quarter-wavelength mode of the second branch 112. Specifically, the second branch 112 supports the third resonant mode. Since the second branch 112 includes a portion of the first radiator 110 between the second free end 112a and the grounding point G0, the second branch 112 can be regarded as an IFA antenna radiator, and the third resonant mode can also be called a quarter-wavelength IFA mode.

[0128] The third resonant current I3 corresponding to the third resonant mode is distributed in the second branch 112. In the current half-wavelength period shown in the schematic diagram of this embodiment, the third resonant current I3 flows from the ground point G0 to the second free end 112a. It can be understood that the third resonant current I3 is periodic, and in the next half-wavelength period, the third resonant current I3 flows from the second free end 112a to the ground point G0.

[0129] Depend on Figures 9 to 15 It can be seen that the first resonance mode, the second resonance mode and the third resonance mode of the first antenna 100 are different, and the directional patterns are also different. By controlling the closing or opening of the switch 121, the equivalent circuits of the first resonance circuit 130 and the switch circuit 120 of the first antenna 100 are different, thereby changing the mode of the first radiator 110 itself, thereby changing the directional pattern. Next, the current distribution and directional pattern distribution of the first frequency band including the WiFi 2.4G frequency band are taken as an example for explanation.

[0130] Please also read Fig.16 , Fig.17 , Fig.18 and Fig.19 , Fig.16 for Fig. 9 A rear view of the antenna assembly shown in FIG. 1 in a vertical position when applied to an electronic device; Fig.17 for Fig.16 A schematic diagram of a portion of the structure of the antenna assembly shown in FIG. 1 when applied to an electronic device; Fig.18 for Fig. 9 A schematic diagram of the resonant current distribution when the switch of the first antenna in the antenna assembly shown in is in an off state and supports the first frequency band; Fig.19 for Fig. 9 The directional pattern when the switch of the first antenna in the antenna assembly shown in FIG. is in the off state and supports the first frequency band. Fig.16 and Fig.17 It can be seen that when the electronic device 1 is in the portrait state, it has a first side 1a and a second side 1b that are bent and connected, wherein when the electronic device 1 is in the portrait state, the first side 1a is the top side of the electronic device 1, and the length of the second side 1b is greater than the length of the first side 1a. Taking the first radiator 110 and the second radiator 210 in the antenna assembly 10 as being both located on the second side 1b of the electronic device 1, and the first radiator 110 being away from the first side 1a compared to the second radiator 210 as an illustration, it can be understood that it should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. In this simulation diagram, the simulation is performed by taking the first frequency band including the WiFi 2.4G frequency band as an example. When the switch 121 is disconnected, the switching circuit 120 is in the second state, and the second resonant mode supports the first frequency band, Fig.18 It can be seen from the resonant current shown that the second resonant mode is a half-wavelength dipole mode of the first radiator 110, and the first frequency band supported by the second resonant mode has a second directivity pattern. Fig.19 It can be seen that the main beam in the second radiation pattern is perpendicular to the second side 1b. Fig.16 , Fig.19In the figure, structures in the electronic device 1 that are irrelevant to the invention point of the antenna assembly 10 are blocked, and do not affect the expression of the antenna assembly 10 and the electronic device 1 in this application.

[0131] Please also read Fig.16 , Fig.17 , Fig. 20 and Fig.21 , Fig. 20 for Fig. 9 A schematic diagram of the resonant current distribution when the switch of the first antenna in the antenna assembly shown in is in a closed state and supports the first frequency band; Fig.21 for Fig. 9 The directional diagram when the switch of the first antenna in the antenna assembly shown in is in a closed state and supports the first frequency band. When the switch 121 is closed, the equivalent impedance of the switch circuit 120 changes from capacitance to inductance, which increases the frequency of the resonance frequency band corresponding to the first resonance mode in disguised form. When the switch 121 is closed, the switch circuit 120 is in the first state, and the first resonance mode supports the first frequency band. Fig. 20 It can be seen from the resonant current shown that the first resonant mode is a quarter-wavelength mode of the first branch 111. Fig.21 It can be seen that the main beam in the first radiation pattern is toward the left side of the figure, that is, the main beam of the first radiation pattern is toward the direction away from the first edge 1a, that is, toward the bottom edge of the electronic device 1 in the vertical screen state.

[0132] It can be seen that the antenna assembly 10 provided in the embodiment of the present application utilizes different states of the switch 121 to make the directional patterns of the first frequency band supported by the first antenna 100 different. Figures 18 to 21 In the simulation, the first frequency band is taken as the WiFi 2.4G frequency band as an example. It can be understood that the first frequency can also be other frequency bands.

[0133] It should be noted that, when the first target frequency band includes the second frequency band, different states of the switch 121 can also be used to achieve different directional patterns of the second frequency band supported by the first antenna 100. For example, when the second frequency band includes the MHB band, and the MHB band includes the B3 band and the B41 band, different states of the switch 121 can also be used to achieve adjustable directional patterns of the B3 band, and adjustable directional patterns of the B41 band.

[0134] In order to better support the first resonance mode, the second resonance mode and the third resonance mode, the electrical lengths of the first radiator 110 and the first branch 111 and the second branch 112 are described below.

[0135] In one embodiment, the electrical length of the first radiator 110 is 0.5 times the wavelength of the center frequency of the second frequency band, or about 0.5 times the wavelength. Specifically, in one embodiment, the electrical length of the first radiator 110 is 0.25 times the wavelength to 0.75 times the wavelength of the center frequency of the second frequency band. For example, when the second frequency band is the MHB frequency band, the electrical length of the first radiator 110 is 0.5 times the wavelength of the center frequency of the MHB frequency band, or about 0.5 times the wavelength. In one embodiment, the electrical length of the first radiator 110 is 0.25 times the wavelength to 0.75 times the wavelength of the center frequency of the MHB frequency band.

[0136] The electrical length of the second branch node 112 is 0.25 times the wavelength of the center frequency of the working frequency band with the largest frequency in the second frequency band, or about 0.25 times the wavelength. Specifically, in one embodiment, the electrical length of the second branch node 112 is 0.1 to 0.5 wavelength of the center frequency of the working frequency band with the largest frequency in the second frequency band. For example, when the second frequency band is the MHB band, the working frequency band with the largest frequency in the second frequency band is the N41 band, and the electrical length of the second branch node 112 is 0.25 times the wavelength of the N41 band, or about 0.25 times the wavelength. In one embodiment, when the second frequency band is the MHB band, the electrical length of the second branch node 112 is 0.1 to 0.5 wavelength of the N41 band.

[0137] The electrical length of the first branch node 111 is 0.25 times the wavelength of the center frequency of the working frequency band with the smallest frequency in the second frequency band, or about 0.25 times the wavelength. Specifically, in one embodiment, the electrical length of the first branch node 111 is 0.1 to 0.5 wavelength of the center frequency of the working frequency band with the smallest frequency in the second frequency band. For example, when the second frequency band is the MHB band, the working frequency band with the smallest frequency in the second frequency band is the B3 band, and the electrical length of the first branch node 111 is 0.25 times the wavelength of the B3 band, or about 0.25 times the wavelength. In one embodiment, when the second frequency band is the MHB band, the electrical length of the first branch node 111 is 0.1 to 0.5 wavelength of the B3 band.

[0138] The electrical length of the first radiator 110, the electrical length of the first branch 111, and the electrical length of the second branch 112 provided in the embodiment of the present application can make the electrical length of the first branch 111 more closely matched with the electrical length required by the first resonance mode, and make the electrical length of the second branch 112 more closely matched with the electrical length required by the third resonance mode, and also make the first radiator 110 more closely matched with the electrical length required by the first radiator 110, so as to better support each resonance mode.

[0139] Please also read Fig. 22 , Fig.23 and Fig.24 , Fig. 22 for Fig. 9 When the antenna assembly shown in the figure is applied to an electronic device, the switch of the first antenna is in an off state and supports a directional pattern of a first frequency band; Fig.23 for Fig. 9 When the antenna assembly shown in the figure is applied to an electronic device, the switch of the first antenna is in a closed state and supports a directional pattern of a first frequency band; Fig.24 A first antenna of the antenna assembly supports a two-dimensional directional pattern of a first frequency band. Fig. 22 and Fig.23 In the figure, the electronic device 1 to which the antenna assembly 10 is applied is in a horizontal screen state and is held by both hands. In addition, Fig. 22 and Fig.23 The electronic device 1 shown in FIG. 1 is a rear view of the electronic device 1. It can be seen that by switching the state of the switch 121, the main beam of the first antenna 100 of the antenna assembly 10 supporting the first frequency band can be switched from the left hand direction to the right hand direction. Fig.24 The red curve is Fig. 22 The first antenna 100 in FIG. 1 supports the directional pattern of the first frequency band, and the green curve is Fig.23 The directional diagram of the first antenna 100 supporting the first frequency band, the blue curve is within the corresponding range, and the gain of the green curve is improved by about 3dB than that of the red curve. Fig.21 , Fig. 22 and Fig.23 In the figure, structures in the electronic device 1 that are irrelevant to the invention point of the antenna assembly 10 are blocked, and do not affect the expression of the antenna assembly 10 and the electronic device 1 in this application.

[0140] See also Fig.25 , Fig.25 is a system radiation efficiency curve of an antenna assembly including a first resonant circuit and an antenna assembly not including the first resonant circuit. Fig.25 In the figure, the horizontal axis is the frequency in GHz, and the vertical axis is the system radiation efficiency in dB. Fig.25 The green curve in ( ) is the efficiency curve of the first antenna 100 including the first resonant circuit 130; Curve ② ( Fig.25The blue curve in ( ) is a system radiation efficiency curve of the antenna assembly 10 that does not include the first resonant circuit 130. It can be seen that the antenna assembly 10 including the first resonant circuit 130 can significantly improve the radiation efficiency of the third frequency band supported by the second antenna 200. In addition, when the second target frequency band includes the fourth frequency band in addition to the third frequency band, the antenna assembly 10 including the first resonant circuit 130 can also improve the radiation efficiency of the fourth frequency band supported by the second antenna 200. In this embodiment, taking the example that the third frequency band includes the N78 frequency band and the fourth frequency band includes the WiFi 5G frequency band, compared with the antenna assembly 10 that does not include the first resonant circuit 130, the antenna assembly 10 includes the first resonant circuit 130, which can improve the radiation efficiency of the N78 frequency band and the WiFi 5G frequency band by 2dB to 5dB.

[0141] See also Fig.26 , Fig.26 for Fig. 9 The system total efficiency curve of the second antenna when the switch of the antenna assembly is closed and opened is provided. In this diagram, the horizontal axis is the frequency in GHz, and the vertical axis is the system total efficiency (SystemTotal Efficiency) in dB. Curve ① ( Fig.26 The brown curve in ( ) is the total system efficiency of the second antenna 200 when the switch 121 is closed; Curve ② ( Fig.26 The blue curve in ( ) is the total system efficiency of the second antenna 200 when the switch 121 is disconnected. It can be seen that curve ① and curve ② basically overlap in the third frequency band (such as the N78 frequency band) and the fourth frequency band (such as the WiFi 5G frequency band) of the second target frequency band. It can be seen that when the switch 121 is closed or disconnected, the second antenna 200 has little effect on the second target frequency band supported by the antenna assembly 10.

[0142] Combination Fig. 9 In the embodiment shown, in summary, the antenna assembly 10 provided in one embodiment of the present application can cover the first target frequency band when the switch 121 is in the off state (also referred to as the initial state), and the first target frequency band includes the first frequency band and the second frequency band. Therefore, there is no need to use an additional switch 121 in the feed matching circuit of the first antenna 100 of the antenna assembly 10 to save the cost of the first antenna 100. For example, the first frequency band may be a WiFi 2.4G frequency band, and the second frequency band may be an MHB frequency band (such as a B3 frequency band, a B1 frequency band, a B40 frequency band, and a B41 frequency band).

[0143] When the antenna assembly 10 is applied to the electronic device 1, the first antenna 100 can be arranged corresponding to the second side 1b (i.e., the long side) of the electronic device 1, and when the electronic device 1 is in a horizontal screen state and is held by both hands, the first antenna 100 is not held tightly, which can meet the requirements of all frequency bands and multi-band combinations supported by the first antenna 100.

[0144] In one embodiment, when the first radiator 110 is arranged corresponding to the second side 1b, and when the second free end 112a of the first radiator 110 of the first antenna 100 is arranged adjacent to the first side 1a of the electronic device 1 compared to the first free end 111a, the distance from the second free end 112a to the first side 1a can be 10mm to 36mm. In this way, when the electronic device 1 is in a horizontal screen state and is held by both hands, the probability that the first antenna 100 is not held to death can be increased. It can better meet the requirements of all frequency bands and multi-band combinations supported by the first antenna 100.

[0145] Furthermore, in one embodiment, when the first radiator 110 is arranged corresponding to the second side 1b, and when the second free end 112a of the first radiator 110 of the first antenna 100 is arranged adjacent to the first side 1a of the electronic device 1 compared to the first free end 111a, the distance from the second free end 112a to the first side 1a can be 20mm to 30mm. In this way, when the electronic device 1 is in a horizontal screen state and is held by both hands, the probability that the first antenna 100 is not held to death can be further improved. It can better meet the requirements of all frequency bands and multi-band combinations supported by the first antenna 100.

[0146] For example, the distance from the second free end 112a to the first edge 1a may be 20 mm, or 21 mm, or 22 mm, or 23 mm, or 24 mm, or 25 mm, or 26 mm, or 27 mm, or 28 mm, or 29 mm, or 30 mm.

[0147] In summary, the antenna assembly 10 provided in one embodiment of the present application, by constructing and designing the first radiator 110, makes the first radiator 110 have a first resonant mode, a second resonant mode and a third resonant mode to support the first target frequency band, and the first target frequency band includes a first frequency band and a second frequency band. For example, the first frequency band includes a WiFi 2.4G frequency band, and the second frequency band includes an MHB frequency band, so that a multi-mode broadband design of the first antenna 100 can be achieved.

[0148] In addition, by controlling the switch 121, beam switching can be achieved, for example, the first frequency band can be supported by the quarter-wavelength mode of the first branch 111, and the first frequency band can be supported by the half-wavelength mode of the first radiator 110; or the first frequency band can be supported by the half-wavelength mode of the first radiator 110, and the first frequency band can be supported by the half-wavelength mode of the first radiator 110. In this way, the directivity pattern of the first frequency band supported by the first antenna 100 can be changed.

[0149] In addition, in the antenna assembly 10 provided in one embodiment of the present application, the first antenna 100 also includes a first resonant circuit 130, and the first resonant circuit 130 can improve the performance of the second antenna 200 and improve the radiation efficiency of the second target frequency band supported by the second antenna 200.

[0150] The antenna assembly 10 provided in the embodiment of the present application is illustrated by taking the first radiator 110 and the second radiator 210 of the antenna assembly 10 corresponding to the second side 1b of the electronic device 1 as an example. It can be understood that it should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. In other embodiments, the first radiator 110 and the second radiator 210 of the antenna assembly 10 may also be arranged corresponding to the top side (i.e., the first side 1a) of the electronic device 1, may also be arranged corresponding to the bottom side of the electronic device 1, may also be arranged corresponding to one of the four corners of the electronic device 1, etc. The present application does not limit the positions of the first radiator 110 and the second radiator 210 of the antenna assembly 10.

[0151] It can be understood that the introduction of the switch circuit 120 provided in the previous embodiment is an example, and in other embodiments, the switch circuit 120 may also be in other forms.

[0152] See also Fig. 27 , Fig. 27 A schematic diagram of an antenna assembly provided for another embodiment of the present application. In the antenna assembly 10 of the present embodiment, the switch circuit 120 includes a first inductor L01, a first capacitor C01 and a switch 121. One end of the first inductor L01 is grounded. One end of the first capacitor C01 is electrically connected to the other end of the first inductor L01. The switch 121 includes a first connection end 121a and a second connection end 121b, the first connection end 121a is electrically connected to the other end of the first capacitor C01, and the second connection end 121b is electrically connected to the connection point P0. When the first connection end 121a is electrically connected to the second connection end 121b, the switch circuit 120 is in the first state. When the first connection end 121a is disconnected from the second connection end 121b, the switch circuit 120 is in the second state.

[0153] In this embodiment, the antenna assembly 10 includes the first antenna 100 and the second antenna 200 for illustration. It can be understood that the antenna assembly 10 may include the first antenna 100 , and the antenna assembly 10 does not include the second antenna 200 .

[0154] When the first connection end 121a is electrically connected to the second connection end 121b, the switch 121 is closed. In the embodiment of the present application, when the first connection end 121a is electrically connected to the second connection end 121b, the switch circuit 120 is equivalent to a small capacitor.

[0155] When the first connection end 121a and the second connection end 121b are disconnected, the switch 121 is disconnected. In this embodiment, when the first connection end 121a and the second connection end 121b are disconnected, the switch circuit 120 is equivalent to a large inductor.

[0156] Since the equivalent components of the switch circuit 120 are different when the switch circuit 120 is in the first state and when the switch circuit 120 is in the second state, the state of the switch 121 can be controlled so that the resonant current of the first radiator 110 when the switch circuit 120 is in the first state is different from the resonant current distribution of the first radiator 110 when the switch circuit 120 is in the second state. Thus, when the switch circuit 120 is in the first state, the first frequency band has a first directional pattern; when the switch circuit 120 is in the second state, the first frequency band has a second directional pattern. The antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna.

[0157] See also Fig.28 , Fig.28 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application. In the antenna assembly 10 provided in this embodiment, the switch circuit 120 includes a first inductor L01, a first capacitor C01 and a switch 121. One end of the first inductor L01 is grounded. One end of the first capacitor C01 is electrically connected to the other end of the first inductor L01, and the other end of the first capacitor C01 is electrically connected to the connection point P0. The switch 121 includes a first connection end 121a and a second connection end 121b, the first connection end 121a is electrically connected to the other end of the first inductor L01, and the second connection end 121b is electrically connected to the connection point P0. When the first connection end 121a and the second connection end 121b are disconnected, the switch circuit 120 is in the first state. When the first connection end 121a and the second connection end 121b are electrically connected, the switch circuit 120 is in the second state.

[0158] In this embodiment, the antenna assembly 10 includes the first antenna 100 and the second antenna 200 for illustration. It can be understood that the antenna assembly 10 may include the first antenna 100 , and the antenna assembly 10 does not include the second antenna 200 .

[0159] In this embodiment, when the first connection end 121a is electrically connected to the second connection end 121b, the switch 121 is closed. When the switch 121 is closed, the first capacitor C01 is short-circuited, and the switch circuit 120 is equivalent to the first inductor L01.

[0160] When the first connection end 121a and the second connection end 121b are disconnected, the switch 121 is disconnected. When the switch 121 is disconnected, the switch circuit 120 is equivalent to a first capacitor C01 and a first inductor L01 connected in series.

[0161] Since the equivalent components of the switch circuit 120 are different when the switch circuit 120 is in the first state and when the switch circuit 120 is in the second state, the state of the switch 121 can be controlled so that the resonant current of the first radiator 110 when the switch circuit 120 is in the first state is different from the resonant current distribution of the first radiator 110 when the switch circuit 120 is in the second state. Thus, when the switch circuit 120 is in the first state, the first frequency band has a first directional pattern; when the switch circuit 120 is in the second state, the first frequency band has a second directional pattern. The antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna.

[0162] See also Fig.29 , Fig.29 A schematic diagram of an antenna assembly provided in another embodiment of the present application. In this embodiment, the antenna assembly 10 includes a first antenna 100. The first antenna 100 includes a first radiator 110, a first feed source S1 and a switch circuit 120. The first radiator 110 has a first free end 111a, a first feed point P1, a ground point G0, a connection point P0 and a second free end 112a arranged in sequence, and the ground point G0 is grounded. The first feed source S1 is electrically connected to the first feed point P1 to excite the first radiator 110 to support a first target frequency band. The switch circuit 120 includes a first inductor L01 and a switch 121. One end of the first inductor L01 is grounded. The switch 121 includes a first connection end 121a and a second connection end 121b. The first connection end 121a is electrically connected to the other end of the first inductor L01, and the second connection end 121b is electrically connected to the connection point P0.

[0163] Further, in this embodiment, the antenna assembly 10 further includes a second antenna 200. The second antenna 200 includes a second radiator 210 and a second feed source S2. The second radiator 210 includes a third free end 210a, a second feed point P2 and a ground end 210b which are sequentially arranged. The ground end 210b is grounded, wherein the first free end 111a is arranged adjacent to the third free end 210a compared to the second free end 112a. The second feed source S2 is electrically connected to the second feed point P2 to excite the second radiator 210 to support a second target frequency band, and the second target frequency band includes a third frequency band. Further, the first antenna 100 further includes a first resonant circuit 130. One end of the first resonant circuit 130 is grounded through the first feed source S1, and the other end is electrically connected to the first feed point P1. The first resonant circuit 130 includes a first resonant inductor L11 and a first resonant capacitor C11 which are connected in series. The first resonant circuit 130 resonates in the third frequency band.

[0164] In this embodiment, the first free end 111a is disposed closer to the third free end 210a than the second free end 112a, and therefore, the first feeding point P1 is closer to the third free end 210a than the connection point P0. In this embodiment, one end of the first resonant circuit 130 is grounded through the first feed source S1, and the other end is electrically connected to the first feeding point P1, and therefore, the first resonant circuit 130 resonates in the third frequency band, and therefore, the influence of the third frequency band supported by the second radiator 210 on the first target frequency band supported by the first radiator 110 can be reduced.

[0165] In addition, the first resonant circuit 130 includes a first resonant inductor L11 and a first resonant capacitor C11 connected in series. The structure of the first resonant circuit 130 is simple and easy to implement.

[0166] Furthermore, in one implementation, the second target frequency band also includes a fourth frequency band.

[0167] It can be seen that the second antenna 200 of the antenna assembly 10 can not only support the third frequency band, but also support the fourth frequency band, and can meet the communication requirements of the third frequency band and the fourth frequency band. In addition, the second antenna 200 can achieve the communication requirements of the third frequency band and the fourth frequency band with one antenna, and the number of antennas required is small. Therefore, the second antenna 200 has a small volume, and the antenna assembly 10 is arranged with other devices in the electronic device 1.

[0168] Furthermore, the third frequency band includes the N78 frequency band, and the fourth frequency band includes the WiFi 5G frequency band.

[0169] When the third frequency band includes the N78 frequency band and the fourth frequency band includes the WiFi 5G frequency band, the second antenna 200 of the antenna assembly 10 can not only meet the communication function of the N78 frequency band, but also meet the communication function of the WiFi 5G frequency band.

[0170] The frequency of the N79 frequency band is close to that of the WiFi 5GP frequency band, so in one embodiment, the fourth frequency band may also be the N79 frequency band. In this way, the second antenna 200 can meet the communication requirements of the N79 frequency band.

[0171] See also Fig. 9 and Fig.30 , Fig.29 and Fig.31 , Fig.30 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application; Fig.31 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application. In this embodiment, the first antenna 100 further includes a second resonant circuit 140. The second resonant circuit 140 is connected in parallel with the first resonant circuit 130, and the second resonant circuit 140 includes a second resonant inductor L22 and a second resonant capacitor C22 connected in series, and the second resonant circuit 140 resonates in the fourth frequency band.

[0172] Fig.30 The antenna assembly 10 shown is equivalent to Fig. 9 A second resonant circuit 140 is added to the antenna assembly 10 shown in the figure; Fig.31 The antenna assembly 10 shown is equivalent to Fig.29 A second resonant circuit 140 is added to the antenna assembly 10 shown in the figure.

[0173] In this embodiment, the second resonant circuit 140 resonates in the fourth frequency band, so the influence of the fourth frequency band supported by the second radiator 210 on the first target frequency band supported by the first radiator 110 can be reduced.

[0174] In addition, in the antenna assembly 10 provided in the embodiment of the present application, the first antenna 100 includes a second resonant circuit 140, which can improve the system radiation efficiency of the fourth frequency band of the second target frequency band supported by the second antenna 200. According to the geothermal antenna, the first radiator 110 of the first antenna 100 couples the energy of the second radiator 210 of the second antenna 200, and the second resonant circuit 140 resonates in the fourth frequency band. Therefore, the first radiator 110 cannot generate a high-order mode. If the first radiator 110 couples the energy of the second radiator 210 to generate a high-order mode, the system radiation efficiency of the fourth frequency band of the second target frequency band will be reduced. It can be seen that in the antenna assembly 10 provided in the embodiment of the present application, the first antenna 100 includes a second resonant circuit 140, and the second resonant circuit 140 resonates in the fourth frequency band, which can improve the system radiation efficiency of the fourth frequency band.

[0175] See also Fig.32 , Fig.32A schematic diagram of an antenna assembly provided for yet another embodiment of the present application. In this embodiment, the antenna assembly 10 includes a first antenna 100. The first antenna 100 includes a first radiator 110, a first feed source S1 and a switching circuit 120. The first radiator 110 has a first free end 111a, a first feeding point P1, a grounding point G0, a connection point P0 and a second free end 112a arranged in sequence, and the grounding point G0 is grounded. The first feed source S1 is electrically connected to the first feeding point P1 to excite the first radiator 110 to support a first target frequency band. In addition, the antenna assembly 10 also includes a second antenna 200, and the second antenna 200 includes a second radiator 210 and a second feed source S2. The second radiator 210 has a second feeding point P2. The second feed source S2 is electrically connected to the second feeding point P2 to excite the second radiator 210 to support a second target frequency band, and the second target frequency band includes a third frequency band. Further, the first antenna 100 also includes a first resonant circuit 130. One end of the first resonant circuit 130 is grounded. The first resonant circuit 130 includes a first resonant inductor L11 and a first resonant capacitor C11 connected in series. The first resonant circuit 130 resonates in the third frequency band. The first target frequency band includes the first frequency band. The switch circuit 120 includes a first inductor L01 and a switch 121. One end of the first inductor L01 is grounded. The switch 121 includes a first connection end 121a, a second connection end 121b, and a common end 121e. The first connection end 121a is electrically connected to the other end of the first inductor L01, and the second connection end 121b is electrically connected to the other end of the first resonant circuit 130. When the common end 121e is disconnected from the first connection end 121a and the common end 121e is electrically connected to the second connection end 121b, the switch circuit 120 is in the first state. When the common terminal 121e is electrically connected to the first connection terminal 121a and the common terminal 121e is electrically disconnected from the second connection terminal 121b, the switch circuit 120 is in the second state.

[0176] In this embodiment, the switch 121 includes a first connection terminal 121a, a second connection terminal 121b and a common terminal 121e. The common terminal 121e can be electrically connected to one of the first connection terminal 121a and the second connection terminal 121b. Therefore, in one embodiment, the switch 121 is a single-pole double-throw switch.

[0177] The first connection end 121a is electrically connected to the other end of the first inductor L01, and the second connection end 121b is electrically connected to the other end of the first resonant circuit 130. When the common end 121e is disconnected from the first connection end 121a and the common end 121e is electrically connected to the second connection end 121b, the switch circuit 120 is in the first state; when the common end 121e is electrically connected to the first connection end 121a and the common end 121e is electrically disconnected from the second connection end 121b, the switch circuit 120 is in the second state; thus, by controlling the state of the switch 121, the resonant current distribution of the first radiator 110 when the switch circuit 120 is in the first state can be different from the resonant current distribution of the first radiator 110 when the switch circuit 120 is in the second state. Thus, when the switch circuit 120 is in the first state, the first frequency band has a first directivity pattern; when the switch circuit 120 is in the second state, the first frequency band has a second directivity pattern. The antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna.

[0178] In this embodiment, the first antenna 100 includes a first resonant circuit 130 , and the first resonant circuit 130 resonates in a third frequency band. Therefore, the influence of the third frequency band supported by the second radiator 210 on the first target frequency band supported by the first radiator 110 can be reduced.

[0179] In addition, in the antenna assembly 10 provided in the present embodiment, the first antenna 100 includes a first resonant circuit 130, which can also improve the system radiation efficiency of the third frequency band of the second target frequency band supported by the second frequency band. Specifically, for the second antenna 200, the first radiator 110 of the first antenna 100 couples the energy of the second radiator 210 of the second antenna 200, and the first resonant circuit 130 resonates in the third frequency band. Therefore, the first radiator 110 cannot generate a higher-order mode. If the first radiator 110 couples the energy of the second radiator 210 to generate a higher-order mode, the system radiation efficiency of the third frequency band of the second target frequency band will be reduced. It can be seen that in the antenna assembly 10 provided in the embodiment of the present application, the first antenna 100 includes a first resonant circuit 130, and the first resonant circuit 130 resonates in the third frequency band, which can improve the system radiation efficiency of the third frequency band.

[0180] See also Fig.33 , Fig.33A schematic diagram of an antenna assembly provided for yet another embodiment of the present application. In this embodiment, the first target frequency band also includes a second frequency band. The switch circuit 120 is also used to adjust the directional pattern of the second frequency band supported by the first radiator 110, and the switch circuit 120 has a third state and a fourth state. When the switch circuit 120 is in the third state, the first radiator 110 has a third directional pattern in the second frequency band; when the switch circuit 120 is in the fourth state, the first radiator 110 has a fourth directional pattern in the second frequency band, wherein the third directional pattern is different from the fourth directional pattern.

[0181] When the switch circuit 120 is in the third state, the resonant current of the first radiator 110 is distributed differently from the resonant current of the first radiator 110 when the switch circuit 120 is in the fourth state. When the switch circuit 120 is in the third state, the first radiator 110 has a third directional pattern in the second frequency band; when the switch circuit 120 is in the fourth state, the first radiator 110 has a fourth directional pattern in the second frequency band. The antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna. In the second frequency band, the third directional pattern of the antenna assembly 10 in the third state and the fourth directional pattern of the antenna assembly 10 in the fourth state are different, and the directional patterns can be effectively complementary. In one embodiment, the area with a weaker signal in the third directional pattern of the antenna assembly 10 in the third state will be covered by the area with a stronger signal in the directional pattern of the antenna assembly 10 in the fourth state. Accordingly, in the second frequency band, the area with a weaker signal in the fourth directional pattern of the antenna assembly 10 in the fourth state will be covered by the area with a stronger signal in the third directional pattern of the antenna assembly 10 in the third state. It can be seen that by adjusting the state of the switch circuit 120, the antenna assembly 10 can have a better communication effect in the second frequency band, thereby improving the communication experience when the antenna assembly 10 supports the second frequency band. It can be seen that the antenna assembly 10 provided in the embodiment of the present application has a better communication effect in the second frequency band. In addition, since the reconstruction of the directional pattern of the second frequency band can be achieved using a single antenna assembly 10, there is no need to use multiple antenna assemblies 10 to achieve the reconstruction of the directional pattern of the second frequency band. It can be seen that the antenna assembly 10 provided in the embodiment of the present application is conducive to saving the cost of the antenna assembly 10 and saving the space of the electronic device 1 to which the antenna assembly 10 is applied. When the antenna assembly 10 is applied to the electronic device 1, it is convenient to layout in the electronic device 1 with other devices of the electronic device 1.

[0182] Please continue reading Fig.33, the switch circuit 120 includes a first inductor L01 and a switch 121. One end of the first inductor L01 is grounded. The switch 121 includes a first connection end 121a, a second connection end 121b and a common end 121e. The first connection end 121a is electrically connected to the other end of the first inductor L01, and the second connection end 121b is electrically connected to the other end of the first resonant circuit 130. When the common end 121e is disconnected from the first connection end 121a and the common end 121e is electrically connected to the second connection end 121b, the switch circuit 120 is in the first state. When the common end 121e is electrically connected to the first connection end 121a and the common end 121e is electrically disconnected from the second connection end 121b, the switch circuit 120 is in the second state.

[0183] Further, the second target frequency band also includes a fourth frequency band. The switch circuit 120 includes a second inductor L02. One end of the second inductor L02 is grounded. The first antenna 100 also includes a second resonant circuit 140. One end of the second resonant circuit 140 is grounded, the first resonant circuit 130 includes a second resonant inductor L22 and a second resonant capacitor C22 connected in series, and the second resonant circuit 140 resonates in the fourth frequency band. The switch 121 also includes a third connection terminal 121c and a fourth connection terminal 121d. The third connection terminal 121c is electrically connected to the other end of the second inductor L02, and the fourth connection terminal 121d is electrically connected to the second resonant circuit 140. When the common terminal 121e is disconnected from the third connection terminal 121c, and the common terminal 121e is electrically connected to the fourth connection terminal 121d, the switch circuit 120 is in the third state. When the common terminal 121e is electrically connected to the third connection terminal 121c and the common terminal 121e is electrically disconnected from the fourth connection terminal 121d, the switch circuit 120 is in the fourth state.

[0184] Thus, by controlling the state of the switch 121, the resonant current of the first radiator 110 when the switch circuit 120 is in the third state can be distributed differently from the resonant current of the first radiator 110 when the switch circuit 120 is in the fourth state. Thus, when the switch circuit 120 is in the third state, the second frequency band has a third directional pattern; when the switch circuit 120 is in the fourth state, the second frequency band has a fourth directional pattern. The antenna assembly 10 provided in the embodiment of the present application can realize the directional pattern reconstruction of a single antenna.

[0185] In addition, the switch circuit 120 includes a second inductor L02, and the switch 121 includes a third connection terminal 121c and a fourth connection terminal 121d. By controlling the state of the switch 121, the directivity pattern of the second frequency band supported by the first antenna 100 can be adjusted.

[0186] Furthermore, the embodiment of the present application also provides an electronic device 1. The electronic device 1 includes but is not limited to mobile phones, telephones, televisions, tablet computers (Pad), cameras, personal computers, laptop computers (Personal Computer, PC), vehicle-mounted devices, headphones, watches, wearable devices, base stations, vehicle-mounted radars, customer premise equipment (Customer Premise Equipment, CPE) and other devices that can send and receive electromagnetic wave signals. In this application, the electronic device 1 is taken as an example of a mobile phone, and other devices can refer to the specific description in this application. The electronic device 1 may include an antenna assembly 10 as described in any of the previous embodiments. Please refer to the previous introduction of the antenna assembly 10, which will not be repeated here.

[0187] See also Fig.34 and Fig.35 , Fig.34 A schematic diagram of an electronic device provided in one embodiment of the present application; Fig.35 for Fig.34 Schematic diagram of a partial structure of an electronic device in the figure. The electronic device 1 also includes a display screen 70, a middle frame 30 and a shell 90 (also called a battery cover). The display screen 70 and the shell 90 are respectively arranged on two opposite sides of the middle frame 30. The middle frame 30 includes a frame body 310 and a frame 320. In this embodiment, the frame body 310 can be used as a ground pole. The frame 320 is arranged around the periphery of the frame body 310. Among them, the first radiator 110 in the antenna assembly 10 is formed in the frame 320. When the antenna assembly 10 also includes a second radiator 210, the second radiator 210 is also formed in the frame 320.

[0188] The middle frame 30 is usually conductive, such as a metal material (such as aluminum or aluminum-magnesium alloy). In the electronic device 1, the middle frame 30 is usually used to support the display screen 70 and the housing 90. Since the middle frame 30 is conductive, the middle frame 30 can also be used as a ground electrode. The devices in the electronic device 1 can be directly or indirectly electrically connected to the middle frame 30 for grounding.

[0189] In addition, in one embodiment, the middle frame 30 and at least one of the housing 90 and the display screen 70 also form a receiving space. 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 are arranged in the receiving space, and will not be repeated in this embodiment. It can be understood that the above introduction to the electronic device 1 is only a description 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. In other embodiments, the electronic device 1 may also not include the display screen 70 and at least one of the housing 90.

[0190] Please continue reading Fig.34 and Fig.35 , the electronic device 1 has a first side 1a and a second side 1b which are bent and connected. The length of the second side 1b is greater than the length of the first side 1a. When the electronic device 1 is in a vertical screen state, the first side 1a is located at the top of the electronic device 1, and the second side 1b is located at the side of the electronic device 1. The first radiator 110 is arranged corresponding to the position of the second side 1b of the electronic device 1 adjacent to the first side 1a. In this way, when the electronic device 1 is in a vertical screen state, it is not easy to block the first radiator 110 when holding the electronic device 1 with one hand, so that the antenna assembly 10 has better antenna performance in the first target frequency band. In addition, when the antenna assembly 10 also includes a second antenna 200, the second radiator 210 of the second antenna 200 is also arranged corresponding to the position of the second side 1b adjacent to the first side 1a.

[0191] Please continue reading Fig.34 , the electronic device 1 further has a third side 1c. The third side 1c is bent and connected to the second side 1b, and the third side 1c is arranged opposite to the first side 1a. When the electronic device 1 is in a vertical screen state, the third side 1c is located at the bottom of the electronic device 1. Fig.34 and Fig.35In the electronic device shown, the first radiator 110 is arranged corresponding to the portion of the second side 1b adjacent to the first side 1a. It can be understood that it should not be understood as a limitation on the electronic device 1 provided in the embodiment of the present application. In other embodiments, the first radiator 110 can also be arranged corresponding to other positions of the second side 1b. Or, in other embodiments, the first radiator 110 can also be arranged corresponding to the first side 1a. Or, in other embodiments, the first radiator 110 can also be arranged corresponding to the third side 1c. Since when the electronic device 1 is in the portrait state, the first side 1a is located at the top of the electronic device 1, and the third side 1c is located at the bottom of the electronic device 1; therefore, when the first radiator 110 is arranged corresponding to the first side 1a, it can also be regarded as the first radiator 110 being arranged corresponding to the top of the electronic device 1 in the portrait state; when the first radiator 110 is arranged corresponding to the third side 1c, it can also be regarded as the first radiator 110 being arranged corresponding to the bottom of the electronic device 1 in the portrait state.

[0192] See also Fig.36 , Fig.36 A circuit block diagram of an electronic device provided in one embodiment of the present application. In one embodiment, when the electronic device 1 is in a vertical screen state, when the electronic device 1 is held in one hand, it is not easy to block the second radiator 210, so that the antenna assembly 10 has better antenna performance in the second target frequency band.

[0193] The electronic device 1 further includes a processor 50. The processor 50 is electrically connected to the switch circuit 120, and the processor 50 is used to control the state of the switch circuit 120. When the switch circuit 120 is in the first state, the antenna assembly 10 has a first performance in the first frequency band; when the switch circuit 120 is in the second state, the antenna assembly 10 has a second performance in the first frequency band. When the first performance is better than the second performance, the processor 50 controls the switch circuit 120 to switch to the first state or maintain the first state. When the second performance is better than the first performance, the processor 50 controls the switch circuit 120 to switch to the second state or maintain the second state.

[0194] The electronic device 1 provided in the embodiment of the present application also includes a processor 50 which can be combined with the antenna assembly 10 provided in any of the previous embodiments. In the schematic diagram of the present embodiment, the electronic device 1 also includes a processor 50 combined with the antenna assembly 10 provided in the previous embodiment. It can be understood that it should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application.

[0195] It can be seen that in the electronic device 1 provided in the embodiment of the present application, the processor 50 can compare the first performance and the second performance of the antenna component 10, and then control the state of the switch 121, so that the antenna component 10 has better performance when supporting the first frequency band.

[0196] In one embodiment, when the first antenna 100 also supports the second frequency band, when the switch circuit 120 is in the third state, the antenna assembly 10 has a third performance in the second frequency band; when the switch circuit 120 is in the fourth state, the antenna assembly 10 has a fourth performance in the second frequency band. When the third performance is better than the fourth performance, the processor 50 controls the switch circuit 120 to switch to the third state or maintain the third state. When the fourth performance is better than the third performance, the processor 50 controls the switch circuit 120 to switch to the fourth state or maintain the fourth state.

[0197] It can be seen that in the electronic device 1 provided in the embodiment of the present application, the processor 50 can compare the third performance and the fourth performance of the antenna component 10, and then control the state of the switch 121, so that the antenna component 10 has better performance when supporting the second frequency band.

[0198] 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, characterized in that: The antenna assembly includes a first antenna, the first antenna including: a first radiator, the first radiator comprising a first free end and a second free end, and a first feeding point, a grounding point and a connection point located between the first free end and the second free end and arranged in sequence, the first feeding point being arranged closer to the first free end than the connection point, and the grounding point being grounded; a first feed source electrically connected to the first feed point to excite the first radiator to support a first target frequency band, wherein the first target frequency band includes a first frequency band; and a switch circuit electrically connected to the connection point; In which, the switching circuit is used to adjust the radiation pattern of the first frequency band supported by the first radiator, and the switching circuit has a first state and a second state. When the switching circuit is in the first state, the resonant current of the first radiator is different from the resonant current distribution of the first radiator when the switching circuit is in the second state. When the switching circuit is in the first state, the first radiator has a first radiation pattern in the first frequency band; when the switching circuit is in the second state, the first radiator has a second radiation pattern in the first frequency band, wherein the first radiation pattern is different from the second radiation pattern.

2. The antenna assembly according to claim 1, wherein: The first feed source excites the first radiator to generate a first resonance mode, a second resonance mode and a third resonance mode to support the first target frequency band; The first resonance mode corresponds to the first resonance frequency point f1, the second resonance mode corresponds to the second resonance frequency point f2, and the third resonance mode corresponds to the third resonance frequency point f3, wherein f1<f2<f3; When the switch circuit is in the first state, the first resonance mode supports the first frequency band and has a first directivity pattern; When the switch circuit is in a second state, the second resonance mode supports the first frequency band and has a second directivity pattern.

3. The antenna assembly according to claim 2, wherein: The first target frequency band also includes a second frequency band.

4. The antenna assembly according to claim 3, characterized in that The first frequency band includes a WiFi 2.4G frequency band, and the second frequency band includes an MHB frequency band.

5. The antenna assembly according to claim 2, wherein: The first radiator includes a first branch and a second branch, the first branch includes a portion of the first radiator located between the first free end and the grounding point, and the second branch includes a portion of the first radiator located between the second free end and the grounding point; The first resonance mode is a quarter wavelength mode of the first branch; The second resonant mode is a half-wavelength dipole mode of the first radiator; The third resonance mode is a quarter-wavelength mode of the second branch.

6. The antenna assembly according to claim 2, wherein: The switch circuit comprises: a first inductor, one end of which is grounded; and a switch, the switch comprising a first connection end and a second connection end, the first connection end being electrically connected to the other end of the first inductor, and the second connection end being electrically connected to the connection point; When the first connection end is electrically connected to the second connection end, the switch circuit is in the first state; When the first connection end is disconnected from the second connection end, the switch circuit is in the second state.

7. The antenna assembly according to claim 6, wherein: The antenna assembly further includes a second antenna, the second antenna comprising: a second radiator, the second radiator comprising a third free end, a second feeding point and a ground end which are arranged in sequence, the ground end being grounded, wherein the second free end is arranged closer to the third free end than the first free end; and a second feed source electrically connected to the second feed point to excite the second radiator to support a second target frequency band, wherein the second target frequency band includes a third frequency band; The first antenna also includes: A first resonant circuit, one end of the first resonant circuit is grounded, and the other end is electrically connected to the connection point. The first resonant circuit includes a first resonant inductor and a first resonant capacitor connected in series. The first resonant circuit resonates in the third frequency band.

8. The antenna assembly according to claim 6, wherein: The antenna assembly further includes a second antenna, the second antenna comprising: A second radiator, the second radiator comprising a third free end, a second feeding point and a ground end which are arranged in sequence, the ground end being grounded, wherein the first free end is arranged closer to the third free end than the second free end; and a second feed source electrically connected to the second feed point to excite the second radiator to support a second target frequency band, wherein the second target frequency band includes a third frequency band; The first antenna also includes: A first resonant circuit, one end of which is grounded, and the other end of which is electrically connected to the first feeding point. The first resonant circuit comprises a first resonant inductor and a first resonant capacitor connected in series. The first resonant circuit resonates in the third frequency band.

9. The antenna assembly according to claim 7 or 8, characterized in that: The second target frequency band also includes a fourth frequency band.

10. The antenna assembly according to claim 9, wherein: The third frequency band includes the N78 frequency band, and the fourth frequency band includes the WiFi5G frequency band.

11. The antenna assembly according to claim 7 or 8, characterized in that: The first antenna also includes: The second resonant circuit is connected in parallel with the first resonant circuit, the second resonant circuit comprises a second resonant inductor and a second resonant capacitor connected in series, and the second resonant circuit resonates in a fourth frequency band.

12. The antenna assembly according to claim 2, wherein: The switch circuit comprises: A first inductor, one end of which is grounded; A first capacitor, one end of which is electrically connected to the other end of the first inductor; and a switch, the switch comprising a first connection end and a second connection end, the first connection end being electrically connected to the other end of the first capacitor, and the second connection end being electrically connected to the connection point; When the first connection end is electrically connected to the second connection end, the switch circuit is in the first state; When the first connection end is disconnected from the second connection end, the switch circuit is in the second state.

13. The antenna assembly according to claim 2, wherein: The switch circuit comprises: A first inductor, one end of which is grounded; a first capacitor, one end of which is electrically connected to the other end of the first inductor, and the other end of which is electrically connected to the connection point; and a switch, the switch comprising a first connection end and a second connection end, the first connection end being electrically connected to the other end of the first inductor, and the second connection end being electrically connected to the connection point; When the first connection end is disconnected from the second connection end, the switch circuit is in the first state; When the first connection end is electrically connected to the second connection end, the switch circuit is in the second state.

14. The antenna assembly according to claim 2, wherein: The antenna assembly further includes a second antenna, the second antenna comprising: a second radiator, a second feeding point of the second radiator; and a second feed source electrically connected to the second feed point to excite the second radiator to support a second target frequency band, wherein the second target frequency band includes a third frequency band; The first antenna also includes: A first resonant circuit, one end of which is grounded, the first resonant circuit comprising a first resonant inductor and a first resonant capacitor connected in series, and the first resonant circuit resonates in the third frequency band; The first target frequency band includes a first frequency band, and the switch circuit includes: A first inductor, one end of which is grounded; a switch, the switch comprising a first connection end, a second connection end and a common end, the first connection end being electrically connected to the other end of the first inductor, and the second connection end being electrically connected to the other end of the first resonant circuit; When the common terminal is disconnected from the first connection terminal and the common terminal is electrically connected to the second connection terminal, the switch circuit is in the first state; When the common terminal is electrically connected to the first connection terminal and the common terminal is electrically disconnected from the second connection terminal, the switch circuit is in the second state.

15. The antenna assembly according to claim 14, wherein: The first target frequency band also includes a second frequency band; The switching circuit is also used to adjust the radiation pattern of the second frequency band supported by the first radiator. The switching circuit has a third state and a fourth state. When the switching circuit is in the third state, the first radiator has a third radiation pattern in the second frequency band; when the switching circuit is in the fourth state, the first radiator has a fourth radiation pattern in the second frequency band, wherein the third radiation pattern is different from the fourth radiation pattern.

16. The antenna assembly according to claim 15, wherein: The second target frequency band also includes a fourth frequency band; and the switch circuit includes: a second inductor, one end of which is grounded; The first antenna also includes: a second resonant circuit, wherein one end of the second resonant circuit is grounded, the first resonant circuit comprises a second resonant inductor and a second resonant capacitor connected in series, and the second resonant circuit resonates in the fourth frequency band; The switch further includes a third connection end and a fourth connection end, the third connection end is electrically connected to the other end of the second inductor, and the fourth connection end is electrically connected to the second resonant circuit; When the common terminal is disconnected from the third connection terminal and the common terminal is electrically connected to the fourth connection terminal, the switch circuit is in the third state; When the common terminal is electrically connected to the third connection terminal and the common terminal is electrically disconnected from the fourth connection terminal, the switch circuit is in the fourth state.

17. An electronic device, characterized in that: The electronic device comprises the antenna assembly as described in any one of claims 1-16.

18. The electronic device according to claim 17, characterized in that: The electronic device comprises a first side and a second side connected by a bend, and the length of the second side is greater than the length of the first side; Wherein, the first radiator is arranged corresponding to a portion of the second side adjacent to the first side.

19. The electronic device according to claim 17, wherein: The electronic device further comprises: a processor, the processor being electrically connected to the switch circuit, the processor being used to control a state of the switch circuit, wherein when the switch circuit is in the first state, the antenna assembly has a first performance in the first frequency band; and when the switch circuit is in a second state, the antenna assembly has a second performance in the first frequency band; When the first performance is better than the second performance, the processor controls the switch circuit to switch to the first state or maintain the first state; When the second performance is better than the first performance, the processor controls the switch circuit to switch to the second state or maintain the second state.

Images