Antenna assembly and electronic device

Abstract

This application provides an antenna assembly and an electronic device. The antenna assembly includes a first antenna, which includes a first radiator, a first feed source, and a switching circuit. The first radiator includes first and second free ends, and a first feed point, a ground point, and a connection point arranged sequentially between the first and second free ends. The first feed source is electrically connected to the first feed point to excite the first radiator to support a first target frequency band, which includes a first frequency band. The switching circuit is electrically connected to the connection point to adjust the radiation pattern of the first frequency band supported by the first radiator. The switching circuit has first and second states. The resonant current distribution of the first radiator is different when the switching circuit is in the first and second states. 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. The first and second radiation patterns are different.

Description

Technical Field

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

[0002] With technological advancements, mobile phones and other electronic devices with communication capabilities are becoming increasingly widespread and powerful. These devices typically include antenna components to enable their communication functions. However, the communication performance of antenna components in related technologies is still insufficient and requires further improvement. Summary of the Invention

[0003] In a first aspect, embodiments of this application provide an antenna assembly, the antenna assembly including a first antenna, the first antenna including:

[0004] A first radiator, comprising a first free end and a second free end, and a first feed point, a grounding point and a connection point arranged sequentially between the first free end and the second free end, wherein the first feed point is located closer to the first free end than the connection point, and the grounding point is 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, the first target frequency band including a first frequency band; and

[0006] A switching circuit, wherein the switching circuit is electrically connected to the connection point;

[0007] The switching circuit is used to adjust the radiation pattern of the 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, 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, embodiments of this application provide an electronic device, the electronic device including the antenna assembly as described in the first aspect.

[0009] In summary, the antenna assembly provided in this application includes a first antenna. The first radiator of the first antenna includes a first free end and a second free end, and a first feed point, a ground point, and a connection point are sequentially arranged between the first and second free ends. The first feed point is located closer to the first free end than the connection point. The ground point is grounded. The first feed source is electrically connected to the first feed point, and the switching circuit is electrically connected to the connection point. Therefore, by designing the positions of the ground point and the first feed point in the first radiator, the first feed source can excite the first radiator to support a first frequency band of a first target frequency band. Furthermore, by designing the position of the connection point in the first radiator and electrically connecting the switching circuit to the connection point, and by controlling the state of the switching circuit, the switching circuit can be in a first state or 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. The antenna assembly provided in this application can achieve pattern reconstruction of a single antenna. In the first frequency band, the first pattern of the antenna assembly in the first state and the second pattern of the antenna assembly in the second state are different, effectively forming pattern complementarity. In one embodiment, the weaker signal area in the first pattern of the antenna assembly in the first state is covered by the stronger signal area in the pattern of the antenna assembly in the second state. Correspondingly, in the first frequency band, the weaker signal area in the second pattern of the antenna assembly in the second state is covered by the stronger signal area in the first pattern of the antenna assembly in the first state. Therefore, by adjusting the state of the switching circuit, the antenna assembly can achieve better communication performance in the first frequency band, thereby improving the communication experience when the antenna assembly supports the first frequency band. Thus, the antenna assembly provided in this application has better communication performance in the first frequency band. Furthermore, since pattern reconstruction of the first frequency band can be achieved using a single antenna assembly, it is not necessary to use multiple antenna assemblies to achieve pattern reconstruction of the first frequency band. Therefore, the antenna assembly provided in this application helps save on antenna assembly costs and space in the electronic device in which the antenna assembly is used. When the antenna assembly is used in an electronic device, it facilitates its layout with other components within the electronic device. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 A schematic diagram of an antenna assembly provided according to one embodiment of this application;

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

[0013] Figure 3 for Figure 2 The system overall efficiency and system radiation efficiency curves of the antenna assembly are shown in the figure.

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

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

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

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

[0018] Figure 8 One implementation method Figure 1 A detailed schematic diagram of the antenna assembly shown;

[0019] Figure 9 A schematic diagram of an antenna assembly provided in another embodiment of this application;

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

[0021] Figure 11 for Figure 9 Simulation diagram of current flow direction in the first resonant mode of the first antenna of the antenna assembly shown;

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

[0023] Figure 13 for Figure 9 Simulation diagram of current flow direction in the second resonant mode of the first antenna of the antenna assembly shown;

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

[0025] Figure 15 for Figure 9 Simulation diagram of current flow direction in the third resonant mode of the first antenna of the antenna assembly shown;

[0026] Figure 16 for Figure 9 The antenna assembly shown is in portrait orientation when it is used in an electronic device.

[0027] Figure 17 for Figure 16 The diagram shows a partial structural schematic of the antenna assembly when applied to an electronic device;

[0028] Figure 18 for Figure 9 The diagram shows the resonant current distribution when the first antenna in the antenna assembly is in the off state and supports the first frequency band.

[0029] Figure 19 for Figure 9 The radiation pattern of the first antenna in the antenna assembly shown is in the off state and supports the first frequency band;

[0030] Figure 20 for Figure 9 The diagram shows the resonant current distribution when the first antenna in the antenna assembly is in the closed state and supports the first frequency band.

[0031] Figure 21 for Figure 9 The radiation pattern of the first antenna in the antenna assembly shown is when the switch is closed and the first frequency band is supported;

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

[0033] Figure 23 for Figure 9 When the antenna assembly shown is applied to an electronic device, the first antenna switch is closed and it supports the radiation pattern of the first frequency band;

[0034] Figure 24 The first antenna of the antenna assembly supports a two-dimensional radiation pattern for the first frequency band;

[0035] Figure 25 The system radiation efficiency curves are shown for the antenna assembly including the first resonant circuit and the antenna assembly excluding the first resonant circuit.

[0036] Figure 26 for Figure 9 The overall system efficiency curves of the second antenna when the provided antenna assembly is switched on and off;

[0037] Figure 27 A schematic diagram of an antenna assembly provided for yet another embodiment of this application;

[0038] Figure 28 A schematic diagram of an antenna assembly provided for yet another embodiment of this application;

[0039] Figure 29 A schematic diagram of an antenna assembly provided in another embodiment of this application;

[0040] Figure 30 A schematic diagram of an antenna assembly provided in another embodiment of this application;

[0041] Figure 31 A schematic diagram of an antenna assembly provided for yet another embodiment of this application;

[0042] Figure 32 A schematic diagram of an antenna assembly provided for yet another embodiment of this application;

[0043] Figure 33 A schematic diagram of an antenna assembly provided for yet another embodiment of this application;

[0044] Figure 34 A schematic diagram of an electronic device provided according to one embodiment of this application;

[0045] Figure 35 for Figure 34 A partial structural diagram of the electronic devices in the diagram;

[0046] Figure 36 A circuit block diagram of an electronic device provided in one embodiment of this application.

[0047] Explanation of key component designations:

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

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

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

[0051] Switching 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] First resonant circuit 130, first resonant inductor L11, first resonant capacitor C11;

[0053] Second resonant circuit 140, second resonant inductor L22, second resonant capacitor C22;

[0054] Second antenna 200, second radiator 210, third free end 210a, second feed point P2, grounding end 210b, second feed source S2;

[0055] First resonant current I1, second resonant current I2, third resonant current I3;

[0056] The frame body is 310mm and the border is 320mm. Detailed Implementation

[0057] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the embodiments described in this application are only a part of the embodiments, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without creative effort are within the protection scope of this application.

[0058] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will 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, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a particular order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, an assembly or device comprising one or more components is not limited to the one or more components listed, but may optionally also include one or more components not listed but inherent to the exemplified product, or one or more components that it should have based on the described function.

[0060] Please see Figure 1 , Figure 1 This is a schematic diagram of an antenna assembly provided according to an embodiment of this 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 switching 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 are sequentially disposed between the first free end 111a and the second free end 112a. The first feed point P1 is adjacent to the first free end 111a relative to 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, the first target frequency band including a first frequency band. The switching circuit 120 is electrically connected to the connection point P0. The switching circuit 120 is used to adjust the radiation pattern of the first frequency band supported by the first radiator 110, and the switching circuit 120 has a first state and a second state. The resonant current of the first radiator 110 when the switching circuit 120 is in the first state is different from the resonant current distribution of the first radiator 110 when the switching circuit 120 is in the second state. When the switching circuit 120 is in the first state, the first radiator 110 has a first radiation pattern in the first frequency band. When the switching circuit 120 is in the second state, the first radiator 110 has a second radiation pattern in the first frequency band. The first radiation pattern is different from the second radiation pattern.

[0061] The first radiator 110 can be a laser direct-structuring (LDS) radiator, a flexible printed circuit (FPC) radiator, a printed direct-structuring (PDS) radiator, or a metal dendrite radiator. When the antenna assembly 10 is applied to electronic device 1 (see...), Figures 34 to 36In this case, the first radiator 110 can be a Mechanical Design Antenna (MDA) radiator designed using the embedded metal of the electronic device 1 itself. For example, the first radiator 110 can be an antenna radiator designed using the plastic and metal mid-frame 30 of the electronic device 1. In addition, the first radiator 110 can also be a metal frame radiator designed using the metal mid-frame 30.

[0062] The grounding method of the grounding point G0 can be, but is not limited to, being electrically connected to the ground electrode (also called the ground plate) of the electronic device 1 through a grounding component (such as a conductive spring, conductive adhesive, or conductive screw). The ground electrode of the electronic device 1 can 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 component 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, and 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. 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 can be electrically connected to the first feed point P1 in a manner that is not limited to, but can be, through a feed component (such as a conductive spring, conductive adhesive, or conductive screw, etc.) to the first feed point P1.

[0065] The resonant current of the first radiator 110 when the switching circuit 120 is in the first state is different from the resonant circuit distribution of the first radiator 110 when the switching circuit 120 is in the second state. Therefore, the first radiation pattern is different from the second radiation pattern. The difference between the first radiation pattern and the second radiation pattern includes, but is not limited to, the main beam pointing in the first radiation pattern being different from the main beam pointing in the second radiation pattern.

[0066] The switching circuit 120 will be described in detail later with reference to different embodiments of the switching 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 High Band (MHB) and the WiFi 2.4 GHz band. In this embodiment, the first target frequency band is the WiFi 2.4 GHz band. It is understood that the frequency range of the first target frequency band and the frequency range of the first frequency band are merely examples; in other embodiments, the frequency range of the first target frequency band and the frequency range of the first frequency band can also be other ranges.

[0068] In summary, the antenna assembly 10 provided in this application includes a first antenna 100. The first radiator 110 of the first antenna 100 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 are arranged sequentially between the first free end 111a and the second free end 112a. The first feed point P1 is located closer to the first free end than the connection point P0. The ground point G0 is grounded. The first feed source S1 is electrically connected to the first feed point P1. The switching circuit 120 is electrically connected to the connection point P0. Thus, by designing the positions of the ground point G0 and the first feed 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. Furthermore, by designing the position of connection point P0 in the first radiator 110 and electrically connecting the switching circuit 120 to connection point P0, and by controlling the state of the switching circuit 120, the switching circuit 120 can be in either a first state or a second state. When the switching circuit 120 is in the first state, the resonant current distribution of the first radiator 110 is different from that when the switching circuit 120 is in the second state. When the switching circuit 120 is in the first state, the first radiator 110 has a first radiation pattern in the first frequency band; when the switching circuit 120 is in the second state, the first radiator 110 has a second radiation pattern in the first frequency band. The antenna assembly 10 provided in this application embodiment can realize single-antenna radiation pattern reconstruction. When supporting the first frequency band, the first radiation pattern of the antenna assembly 10 in the first state and the second radiation pattern of the antenna assembly 10 in the second state are different, effectively forming radiation pattern complementarity. In one embodiment, the weaker signal area in the first radiation pattern of the antenna assembly 10 in the first state is covered by the stronger signal area in the radiation pattern of the antenna assembly 10 in the second state. Accordingly, when supporting the first frequency band, the areas with weaker signals in the second radiation pattern of the antenna assembly 10 in the second state will be covered by the areas with stronger signals in the first radiation pattern of the antenna assembly 10 in the first state. Therefore, by adjusting the state of the switching circuit 120, the antenna assembly 10 can achieve better communication performance in the first frequency band, thereby improving the communication experience when the antenna assembly 10 supports the first frequency band. Thus, the antenna assembly 10 provided in this embodiment has better communication performance in the first frequency band. Furthermore, since the radiation pattern reconstruction of the first frequency band can be achieved using a single antenna assembly 10, it is not necessary to use multiple antenna assemblies 10 to achieve the radiation pattern reconstruction of the first frequency band.Therefore, the antenna assembly 10 provided in this application embodiment is advantageous in saving the cost of the antenna assembly 10 and the space of the electronic device 1 in which the antenna assembly 10 is applied. When the antenna assembly 10 is applied in the electronic device 1, it is convenient to arrange it with other devices in the electronic device 1.

[0069] Please see Figure 2 , Figure 2 for Figure 1 The diagram shows the S11 parameter curve of the first antenna when the switching circuit of the antenna assembly is in the first state. The first feed 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. The first resonant mode is different from the second resonant mode. The first resonant mode corresponds to a first resonant frequency f1, the second resonant mode corresponds to a second resonant frequency f2, and the third resonant mode corresponds to a third resonant frequency f3, where f1 < f2 < f3. When the switching 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 radiation pattern.

[0070] In the simulation diagram of this embodiment, the horizontal axis represents frequency in GHz, and the vertical axis represents S-parameters in dB. As can be seen from the simulation diagram, the first feed S1 excites the first radiator 110 with three resonant modes. These three resonant modes are named, in ascending order of resonant frequency, the first resonant mode, the second resonant mode, and the third resonant mode. In this embodiment, the first resonant frequency f1 of the first resonant mode is described in [reference needed]. Figure 2 Point 5 in the diagram, and the second resonant frequency f2 of the second resonant mode, please refer to [link / reference]. Figure 2 For point 2 in the diagram, and the third resonant frequency f3 of the third resonant mode, please refer to [the diagram / reference]. Figure 2 Point 6 in the diagram. The -4dB bandwidth can cover 1.7GHz to 2.7GHz. Therefore, in this embodiment, the range of the first target frequency band is 1.7GHz to 2.7GHz, including the MHB band and the WiFi 2.4G band.

[0071] When the switching circuit 120 is in the first state, the first resonant mode supports the first frequency band; when the switching circuit 120 is in the second state, the second resonant mode supports the second frequency band. Since the first resonant mode and the second resonant mode are different, the resonant current distribution of the first radiator 110 when the switching circuit 120 of the antenna assembly 10 is in the first state is different from the resonant current distribution of the first radiator 110 when the switching circuit 120 of the antenna assembly 10 is in the second state. Therefore, when the switching circuit 120 is in the first state, the first frequency band has a first radiation pattern; when the switching circuit 120 is in the second state, the first frequency band has a second radiation pattern, and the first radiation pattern is different from the second radiation pattern. The antenna assembly 10 provided in this application embodiment can realize radiation pattern reconstruction of a single antenna.

[0072] Please see Figure 3 , Figure 3 for Figure 2 The diagram shows the system's overall efficiency and system radiation efficiency curves for the antenna assembly. For ease of illustration, Figure 3 (a) in the image is in color. Figure 3 (b) in the middle is Figure 3 The grayscale image of (a) in the diagram. In the schematic diagram of this embodiment, curve ① (corresponding to...) Figure 3 The blue curve in (a) is the system radiation efficiency curve of the first antenna 100, and curve ② (corresponding to...) Figure 3 The yellow curve in (a) is the system total efficiency curve of the first antenna 100. It can be seen that the first antenna 100 has good system radiation efficiency and good system total efficiency in the first target frequency band.

[0073] The first, second, and third resonant modes are described in detail below. Please refer to the following sections. Figure 1 , Figure 4 , Figure 4 for Figure 1 This is a schematic diagram illustrating another dimension of the antenna assembly. The first radiator 110 includes a first branch 111 and a second branch 112. The first branch 111 includes the portion of the first radiator 110 located between the first free end 111a and the ground point G0. The second branch 112 includes the portion of the first radiator 110 located between the second free end 112a and the ground point G0.

[0074] Please see Figure 5 , Figure 5 for Figure 4The diagram shows the current flow in the first resonant mode of the first antenna in the antenna assembly shown. The first resonant mode is the quarter-wavelength mode of the first stub 111.

[0075] For ease of description, the resonant current corresponding to the first resonant mode is named the first resonant current I1. The first resonant mode is the quarter-wavelength mode of the first stub 111. Specifically, the first stub 111 supports the first resonant mode. Since the first stub 111 includes the portion of the first radiator 110 located between the first free end 111a and the grounding point G0, the first stub 111 can be regarded as an inverted-Fantenna (IFA) radiator, and the first resonant mode can also be called the 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 resonant mode is the quarter-wavelength mode of the first stub 111, which is the wavelength corresponding to the center frequency (also known as the center frequency point) of the frequency band corresponding to the first resonant mode.

[0078] A quarter-wavelength mode, also known as the fundamental mode, supports a frequency band with high radiation efficiency. In this embodiment, when the antenna assembly 10 is in the first state, the feed S excites the first resonant mode of the radiator 110 to support a portion of the first target frequency band. The first resonant mode is the quarter-wavelength mode of the first stub 111. Therefore, when the antenna assembly 10 is in the first state, the antenna assembly 10 has high radiation efficiency in the first resonant mode to support the portion of the first target frequency band.

[0079] Please see Figure 6 , Figure 6 for Figure 4 The diagram shows the current flow in the second resonant mode of the first antenna in the antenna assembly shown. The second resonant mode is the half-wavelength dipole mode of the stub of the first radiator 110.

[0080] For ease of description, the resonant current corresponding to the second resonant mode is named the second resonant current I2. The second resonant mode is the half-wavelength dipole mode of the stub of the first radiator 110. In this embodiment, the second resonant mode is also called the half-wavelength mode of the first radiator 110, or the 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; 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 second resonant mode is the half-wavelength dipole mode of the first radiator 110 stub, which is the wavelength corresponding to the center frequency (also known as the center frequency point) of the frequency band corresponding to the second resonant mode.

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

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

[0085] Please see Figure 7 , Figure 7 for Figure 4 The diagram shows the current flow in the third resonant mode of the first antenna of the antenna assembly shown. The third resonant mode is the quarter-wavelength mode of the second stub 112.

[0086] For ease of description, the resonant current corresponding to the third resonant mode is named the third resonant current I3. The third resonant mode is the quarter-wavelength mode of the second stub 112. Specifically, the second stub 112 supports the third resonant mode. Since the second stub 112 includes the portion of the first radiator 110 located between the second free end 112a and the grounding point G0, the second stub 112 can be regarded as an IFA antenna radiator, and the third resonant mode can also be called the 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; 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 third resonant mode is the quarter-wavelength mode of the second stub 112, which is the wavelength corresponding to the center frequency (also known as the center frequency point) of the frequency band corresponding to the third resonant mode.

[0089] A quarter-wavelength mode, also known as the fundamental mode, supports a frequency band with high radiation efficiency. Therefore, the antenna assembly 10 in the third resonant mode is the quarter-wavelength mode of the second stub 112, and the third resonant mode supports a portion of the first target frequency band with high radiation efficiency.

[0090] In this embodiment, the first resonant mode corresponds to the first resonant frequency f1, the second resonant mode corresponds to the second resonant frequency f2, and the third resonant mode corresponds to the third resonant frequency f3, wherein f1 < f2 < f3. In one embodiment, the length of the first stub 111 is less than the length of the second stub 112 (that is, the length of the second stub 112 is greater than the length of the first stub 111). Thus, the first antenna 100 does not need to use complex matching or even any matching at all, so that the first resonant frequency f1 corresponding to the first resonant mode supported by the first stub 111 is less than the third resonant frequency f3 corresponding to the third resonant mode supported by the second stub 112.

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

[0092] Furthermore, in this embodiment, 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. Therefore, the antenna assembly 10 can not only meet the communication function of the first frequency band, but also the communication function of the second frequency band. In addition, the first antenna 100 can realize the communication requirements of the first frequency band and the second frequency band with a single 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] Furthermore, in this embodiment, the first frequency band includes the WiFi 2.4G frequency band, and the second frequency band includes the 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] Please see Figure 8 , Figure 8 One implementation method Figure 1The diagram shows a detailed schematic of the antenna assembly. In this embodiment, the switching 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 terminal 121a and a second connection terminal 121b. The first connection terminal 121a is electrically connected to the other end of the first inductor L01, and the second connection terminal 121b is electrically connected to the connection point P0. When the first connection terminal 121a and the second connection terminal 121b are electrically connected, the switching circuit 120 is in the first state. When the first connection terminal 121a and the second connection terminal 121b are disconnected, the switching circuit 120 is in the second state.

[0097] The switch 121 includes a first connection terminal 121a and a second connection terminal 121b. The first connection terminal 121a is electrically connected to the other end of the first inductor L01, and the second connection terminal 121b is electrically connected to the connection point P0. When the first switch 121 is open, the first connection terminal 121a and the second connection terminal 121b are disconnected, and the first inductor L01 is disconnected from the connection point P0. When the first switch 121 is closed (also referred to as when the first switch 121 is closed), the first connection terminal 121a and the second connection terminal 121b are electrically connected, and the first inductor L01 is electrically connected to the connection point P0. Therefore, the connection relationship between the first radiator 110 and the first inductor L01 is different when the first switch 121 is open compared to when the first switch 121 is closed in the antenna assembly 10 provided in this application embodiment.

[0098] In this embodiment, when the first connection terminal 121a and the second connection terminal 121b are electrically connected, the switching circuit 120 is in the first state; when the first connection terminal 121a and the second connection terminal 121b are disconnected, the switching circuit 120 is in the second state. Therefore, 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 is different from that when the switch circuit 120 is in the second state. This results in the first frequency band having a first radiation pattern when the switch circuit 120 is in the first state, and the first frequency band having a second radiation pattern when the switch circuit 120 is in the second state. The antenna assembly 10 provided in this application embodiment can realize single-antenna radiation pattern reconstruction.

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

[0100] Please see Figure 9 , Figure 9 This is a schematic diagram of an antenna assembly provided in another embodiment of this application. In this embodiment, the antenna assembly 10 includes a first antenna 100, which includes a first radiator 110, a first feed S1, and a switching circuit 120. The first radiator 110, the first feed S1, and the switching circuit 120 in the first antenna 100 are described above and will not be 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 S2. The second radiator 210 includes a third free end 210a, a second feed point P2, and a ground end 210b arranged sequentially. The ground end 210b is grounded, wherein the second free end 112a is disposed adjacent to the third free end 210a relative to the first free end 111a. The second feed S2 is electrically connected to the second feed point P2 to excite the second radiator 210 to support a second target frequency band, which 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 structural (LDS) radiator, a flexible printed circuit (FPC) radiator, a printed direct structural (PDS) radiator, or a metal stub radiator. When the antenna assembly 10 is applied to the electronic device 1, the second radiator 210 can be a mechanical design antenna (MDA) radiator designed using the embedded metal of the electronic device 1 itself. For example, the second radiator 210 can be an antenna radiator designed using the plastic and metal mid-frame 30 of the electronic device 1. Furthermore, the second radiator 210 can also be a metal frame 320 radiator designed from the metal mid-frame 30.

[0102] The grounding terminal 210b can be grounded in a manner that is not limited to, but can be, through a grounding component (such as a conductive spring, conductive adhesive, or conductive screw, etc.) electrically connected to the ground electrode (also called a ground plate) of the electronic device 1. The ground electrode of the electronic device 1 can 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 component of the display screen 70 of the electronic device 1, or the ground of the housing 90.

[0103] Since the second radiator 210 has a third free end 210a, a second feed point P2 and a grounding end 210b arranged in sequence, and the grounding end 210b is grounded, the second radiator 210 is also called an IFA radiator.

[0104] The second feed source S2 can be electrically connected to the second feed point P2 in a manner that is not limited to, but can be, through a feed component (such as a conductive spring, conductive adhesive, or conductive screw).

[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] Furthermore, the antenna assembly 10 provided in this embodiment, with the first antenna 100 including a first resonant circuit 130, 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 higher-order modes. If the first radiator 110 couples the energy of the second radiator 210 and generates higher-order modes, the system radiation efficiency of the third frequency band of the second target frequency band will be reduced. Thus, the antenna assembly 10 provided in this embodiment, with the first antenna 100 including a first resonant circuit 130 resonating in the third frequency band, can improve the system radiation efficiency of the third frequency band. This will be explained later with reference to simulation diagrams.

[0107] In addition, the first resonant circuit 130 includes a first resonant inductor L11 and a first resonant capacitor C11 connected in series, and 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 embodiment, the second target frequency band also includes a fourth frequency band.

[0110] Therefore, the second antenna 200 of the antenna assembly 10 can support not only the third frequency band but also the fourth frequency band, thus meeting the communication requirements of both the third and fourth frequency bands. Furthermore, the second antenna 200 can fulfill the communication requirements of both the third and fourth frequency bands with a single antenna, requiring fewer antennas. Therefore, the second antenna 200 has a smaller size, allowing the antenna assembly 10 to be integrated with other components 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 N79 band and the WiFi 5GP band have similar frequencies; therefore, in one embodiment, the fourth band can also be the N79 band. This allows the second antenna 200 to meet the communication requirements of the N79 band.

[0114] The opening and closing states of switch 121 in the first antenna 100 will be described in detail below. As mentioned above, when the first connection terminal 121a of switch 121 is disconnected from the second connection terminal 121b, switch 121 is open; when the first connection terminal 121a of switch 121 is electrically connected to the second connection terminal 121b, switch 121 is closed (also referred to as switch 121 being on).

[0115] The situation when switch 121 in the first antenna 100 is open is described as follows. When switch 121 is open, the first resonant circuit 130 resonates in the third frequency band. Therefore, for the third frequency band, the first resonant circuit 130 is equivalent to grounding. Thus, including the first resonant circuit 130 in the first antenna 100 can effectively block the opening of the second stub 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 impact on the first target frequency band supported by the first antenna 100.

[0116] Specifically, when the first target frequency band includes a first frequency band and a 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; and the second target frequency band includes a third frequency band, and the third target frequency band includes the N78 frequency band; when the switch 121 in the first antenna 100 is open, for the N78 frequency band, the first resonant circuit 130 is equivalent to grounding. Thus, including the first resonant circuit 130 in the first antenna 100 can effectively block the opening of the second stub 112 to ensure the performance of the N78 frequency band. However, for the WiFi 2.4G and MHB frequency bands 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 impact on the WiFi 2.4G and MHB frequency bands supported by the first antenna 100.

[0117] The situation when switch 121 in the first antenna 100 is closed is described as follows. When switch 121 is closed, it is equivalent to adding an additional first inductor L01 in parallel with the first resonant circuit 130. Therefore, the first resonant circuit 130 and the switch circuit 120 together 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 inductors for the first and second frequency bands in the first target frequency band, and equivalent to capacitors for the third frequency band supported by the second antenna 200. The effect is similar to a short circuit. Therefore, when switch 121 in the first antenna 100 is closed, it has almost no impact on the performance of the second antenna 200.

[0118] Specifically, when the first target frequency band includes a first frequency band and a 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; and the second target frequency band includes a 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 equivalent parallel circuit of the first resonant circuit 130 and the switch circuit 120 is slightly lower than the N78 frequency band but higher than the N41 frequency band. Therefore, the equivalent parallel circuit of the first resonant circuit 130 and the switch circuit 120 is equivalent to an inductor for the WiFi 2.4G and MHB frequency bands, and equivalent to a capacitor for the N78 frequency band, with an effect similar to a short circuit. Therefore, when the switch 121 in the first antenna 100 is closed, it has almost no impact on the performance of the second antenna 200.

[0119] The antenna assembly 10 provided in the embodiments of this application will be described and simulated next. It should be noted that, for clearer illustration, the simulation diagrams in the following figures are shown as two diagrams in the same figure. In the same figure, (a) is a color image and (b) is a grayscale image of image (a) in the same figure.

[0120] Please see Figure 9 , Figure 10 and Figure 11 , Figure 10 for Figure 9 A schematic diagram of the current flow direction in the first resonant mode of the first antenna in the antenna assembly shown. Figure 11 for Figure 9 The diagram shows a simulation of the current flow in the first resonant mode of the first antenna assembly. The first radiator 110 includes a first stub 111 and a second stub 112. The first stub 111 includes the portion of the first radiator 110 located between the first free end 111a and the ground point G0. The second stub 112 includes the portion of the first radiator 110 located between the second free end 112a and the ground point G0.

[0121] For ease of description, the resonant current corresponding to the first resonant mode is named the first resonant current I1. The first resonant mode is the quarter-wavelength mode of the first stub 111. Specifically, the first stub 111 supports the first resonant mode. Since the first stub 111 includes the portion of the first radiator 110 located between the first free end 111a and the grounding point G0, the first stub 111 can be regarded as an IFA antenna radiator, and the first resonant mode can also be called the 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] Please see Figure 9 , Figure 12 and Figure 13 , Figure 12 for Figure 9 A schematic diagram of the current flow direction in the second resonant mode of the first antenna of the antenna assembly shown; Figure 13 for Figure 9The diagram shows a simulation of the current flow in the second resonant mode of the first antenna in the antenna assembly shown. The second resonant mode is the half-wavelength dipole mode of the stub of the first radiator 110.

[0124] For ease of description, the resonant current corresponding to the second resonant mode is named the second resonant current I2. The second resonant mode is the half-wavelength dipole mode of the stub of the first radiator 110. In this embodiment, the second resonant mode is also called the half-wavelength mode of the first radiator 110, or the 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; 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] Please see Figure 9 , Figure 14 and Figure 15 , Figure 14 for Figure 9 A schematic diagram of the current flow in the third resonant mode of the first antenna in the antenna assembly shown. Figure 15 for Figure 9 The diagram shows a simulation of the current flow in the third resonant mode of the first antenna of the antenna assembly shown. The third resonant mode is the quarter-wavelength mode of the second stub 112.

[0127] For ease of description, the resonant current corresponding to the third resonant mode is named the third resonant current I3. The third resonant mode is the quarter-wavelength mode of the second stub 112. Specifically, the second stub 112 supports the third resonant mode. Since the second stub 112 includes the portion of the first radiator 110 located between the second free end 112a and the grounding point G0, the second stub 112 can be regarded as an IFA antenna radiator, and the third resonant mode can also be called the 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; 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 As can be seen, the radiation patterns of the first antenna 100 differ depending on its first, second, and third resonant modes. By controlling the closing or opening of the switch 121, the equivalent circuits of the first resonant circuit 130 and the switch circuit 120 of the first antenna 100 become different, thereby changing the mode of the first radiator 110 itself and thus altering the radiation pattern. The following explanation will use the current distribution and radiation pattern distribution of the first frequency band, including the WiFi 2.4G band, as an example.

[0130] Please refer to the following: Figure 16 , Figure 17 , Figure 18 and Figure 19 , Figure 16 for Figure 9 The antenna assembly shown is in portrait orientation when it is used in an electronic device. Figure 17 for Figure 16 The diagram shows a partial structural schematic of the antenna assembly when applied to an electronic device; Figure 18 for Figure 9 The diagram shows the resonant current distribution when the first antenna in the antenna assembly is in the off state and supports the first frequency band. Figure 19 for Figure 9 The radiation pattern of the antenna assembly shown is when the first antenna switch is off and the first frequency band is supported. Figure 16 and Figure 17 As can be seen, when the electronic device 1 is in portrait mode, it has a first side 1a and a second side 1b that are bent and connected. When the electronic device 1 is in portrait mode, the first side 1a is the top edge of the electronic device 1, and the length of the second side 1b is greater than the length of the first side 1a. The first radiator 110 and the second radiator 210 in the antenna assembly 10 are both located on the second side 1b of the electronic device 1, and the first radiator 110 is shown to be further away from the first side 1a than the second radiator 210. This should not be construed as a limitation on the antenna assembly 10 provided in this application. In this simulation diagram, the simulation is performed using the first frequency band including the WiFi 2.4G frequency band as an example. When the switch 121 is open, the switch circuit 120 is in the second state, and the second resonant mode supports the first frequency band. Figure 18 As can be seen from the resonant current shown, the second resonant mode is a half-wavelength dipole mode of the stub of the first radiator 110, and the first frequency band supported by the second resonant mode has a second radiation pattern. Figure 19 It can be seen that the main beam in the second pattern is perpendicular to the second side 1b. Figure 16 , Figure 19In this paper, structures in the electronic device 1 that are unrelated to the invention point of the antenna assembly 10 are obscured, but this does not affect the expression of the antenna assembly 10 and the electronic device 1 in this application.

[0131] Please refer to the following: Figure 16 , Figure 17 , Figure 20 and Figure 21 , Figure 20 for Figure 9 The diagram shows the resonant current distribution when the first antenna in the antenna assembly is in the closed state and supports the first frequency band. Figure 21 for Figure 9 The antenna assembly shown depicts the radiation pattern when the switch 121 of the first antenna is closed and supports the first frequency band. When switch 121 is closed, the equivalent impedance of the switching circuit 120 changes from capacitance to inductance, effectively increasing the frequency of the resonant band corresponding to the first resonant mode. When switch 121 is closed, the switching circuit 120 is in the first state, and the first resonant mode supports the first frequency band. Figure 20 As can be seen from the resonant current shown, the first resonant mode is the quarter-wavelength mode of the first stub 111. Figure 21 As can be seen, the main beam of the first directional pattern is oriented to the left side of the diagram, that is, the main beam of the first directional pattern is oriented away from the first side 1a, that is, towards the bottom edge of the electronic device 1 in the vertical screen state.

[0132] Therefore, it can be seen that the antenna assembly 10 provided in this application embodiment utilizes the different states of the switch 121 to make the radiation pattern of the first frequency band supported by the first antenna 100 different. Figures 18 to 21 The simulation takes the first frequency band as the WiFi 2.4G frequency band as an example. Understandably, 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, the different states of the switch 121 can also be used to achieve different radiation patterns for 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, the different states of the switch 121 can also be used to make the radiation pattern of the B3 band adjustable, and the radiation pattern of the B41 band adjustable.

[0134] To better support the first, second, and third resonant modes, the electrical lengths of the first radiator 110, the first stub 111, and the second stub 112 will be described below.

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

[0136] The electrical length of the second branch 112 is approximately 0.25 times the wavelength of the center frequency of the highest operating frequency band in the second frequency band. Specifically, in one embodiment, the electrical length of the second branch 112 is 0.1 to 0.5 wavelengths of the center frequency of the highest operating frequency band in the second frequency band. For example, when the second frequency band is the MHB band, the highest operating frequency band in the second frequency band is the N41 band, and the electrical length of the second branch 112 is approximately 0.25 times the wavelength of the N41 band. In one embodiment, when the second frequency band is the MHB band, the electrical length of the second branch 112 is 0.1 to 0.5 wavelengths of the N41 band.

[0137] The electrical length of the first branch 111 is approximately 0.25 times the wavelength of the center frequency of the lowest operating frequency band in the second frequency band. Specifically, in one embodiment, the electrical length of the first branch 111 is 0.1 to 0.5 wavelengths of the center frequency of the lowest operating frequency band in the second frequency band. For example, when the second frequency band is the MHB band, the lowest operating frequency band in the second frequency band is the B3 band, and the electrical length of the first branch 111 is approximately 0.25 times the wavelength of the B3 band. In one embodiment, when the second frequency band is the MHB band, the electrical length of the first branch 111 is 0.1 to 0.5 wavelengths of the B3 band.

[0138] The electrical lengths of the first radiator 110, the first branch 111, and the second branch 112 provided in this embodiment of the application can make the electrical length of the first branch 111 more compatible with the electrical length required by the first resonant mode, and the electrical length of the second branch 112 more compatible with the electrical length required by the third resonant mode, and also make the electrical length of the first radiator 110 more compatible with the electrical length required by the first radiator 110, thus better supporting each resonant mode.

[0139] Please refer to the following: Figure 22 , Figure 23 and Figure 24 , Figure 22 for Figure 9 When the antenna assembly shown is applied to an electronic device, the first antenna switch is in the off state and supports the radiation pattern of the first frequency band; Figure 23 for Figure 9 When the antenna assembly shown is applied to an electronic device, the first antenna switch is closed and it supports the radiation pattern of the first frequency band; Figure 24 The first antenna of the antenna assembly supports a two-dimensional radiation pattern for the first frequency band. Figure 22 and Figure 23 The illustrations all depict the electronic device 1, on which the antenna assembly 10 is used, in a landscape orientation and held by both hands. Furthermore... Figure 22 and Figure 23 The electronic device 1 shown 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 can be switched from the left-hand to the right-hand direction when supporting the first frequency band. Figure 24 In the middle, the red curve represents... Figure 22 The first antenna 100 in the image supports the radiation pattern of the first frequency band, as shown by the green curve. Figure 23 The radiation pattern of the first antenna 100 supporting the first frequency band is shown in the blue curve, indicating the corresponding range. The gain of the green curve is approximately 3dB higher than that of the red curve. Understandably, in... Figure 21 , Figure 22 and Figure 23 In this paper, structures in the electronic device 1 that are unrelated to the invention point of the antenna assembly 10 are obscured, but this does not affect the expression of the antenna assembly 10 and the electronic device 1 in this application.

[0140] Please see Figure 25 , Figure 25 The system radiation efficiency curves are shown for the antenna assembly including the first resonant circuit and the antenna assembly excluding the first resonant circuit. Figure 25 In the graph, the horizontal axis represents frequency in GHz, and the vertical axis represents system radiation efficiency in dB. Curve ① ( Figure 25 The green curve in the figure represents the efficiency curve of the first antenna 100, which includes the first resonant circuit 130; curve ② ( Figure 25The blue curve in the figure represents the system radiation efficiency curve of the antenna assembly 10 excluding 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. Furthermore, when the second target frequency band includes a fourth frequency band in addition to the third, 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 third frequency band including the N78 band and the fourth frequency band including the WiFi 5G band as an example, compared to the antenna assembly 10 without the first resonant circuit 130, the antenna assembly 10 including the first resonant circuit 130 can improve the radiation efficiency of both the N78 band and the WiFi 5G band by 2dB to 5dB.

[0141] Please see Figure 26 , Figure 26 for Figure 9 The provided antenna assembly's system total efficiency curves for the second antenna when the switch is closed and open. In this schematic diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents system total efficiency in dB. Curve ① ( Figure 26 The brown curve in the figure represents the overall system efficiency of the second antenna 200 when switch 121 is closed; curve ② ( Figure 26 The blue curve in the figure represents the overall system efficiency of the second antenna 200 when switch 121 is open. It can be seen that curves ① and ② essentially overlap in the third frequency band (e.g., N78 band) and the fourth frequency band (e.g., WiFi 5G band) of the second target frequency band. Therefore, it is evident that the antenna assembly 10 provided in this embodiment has little impact on the second target frequency band supported by the second antenna 200 antenna assembly 10 when switch 121 is closed or open.

[0142] Combination Figure 9 As illustrated above, the antenna assembly 10 provided in one embodiment of this application can cover the first target frequency band when the switch 121 is in the off state (also known as the initial state), and the first target frequency band includes a first frequency band and a second frequency band. Therefore, an additional switch 121 is not required in the feed matching circuit of the first antenna 100 of the antenna assembly 10, thereby saving the cost of the first antenna 100. For example, the first frequency band can be the WiFi 2.4G frequency band, and the second frequency band can be the MHB frequency band (such as the B3, B1, B40, and B41 frequency bands).

[0143] When the antenna assembly 10 is applied to the electronic device 1, the first antenna 100 can be positioned corresponding to the second side 1b (i.e., the long side) of the electronic device 1. When the electronic device 1 is in landscape mode and held with both hands, the first antenna 100 is not tightly gripped. This satisfies 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 positioned corresponding to the second side 1b, and when the second free end 112a of the first radiator 110 of the first antenna 100 is positioned closer to the first side 1a of the electronic device 1 than the first free end 111a, the distance from the second free end 112a to the first side 1a can be 10mm to 36mm. This increases the probability that the first antenna 100 is not tightly gripped when the electronic device 1 is in landscape mode and held with both hands. It also better meets 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 disposed corresponding to the second side 1b, and when the second free end 112a of the first radiator 110 of the first antenna 100 is disposed adjacent to the first side 1a of the electronic device 1 relative to the first free end 111a, the distance from the second free end 112a to the first side 1a can be 20mm to 30mm. Thus, when the electronic device 1 is in a landscape position and held with both hands, the probability of the first antenna 100 not being tightly gripped can be further increased. This better meets 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 side 1a can be 20mm, or 21mm, or 22mm, or 23mm, or 24mm, or 25mm, or 26mm, or 27mm, or 28mm, or 29mm, or 30mm.

[0147] In summary, the antenna assembly 10 provided in one embodiment of this application, through the construction and design of the first radiator 110, enables the first radiator 110 to have a first resonant mode, a second resonant mode, and a third resonant mode to support the first target frequency band, which includes a first frequency band and a second frequency band. For example, the first frequency band includes the WiFi 2.4G frequency band, and the second frequency band includes the MHB frequency band. Therefore, a multi-mode broadband design of the first antenna 100 can be realized.

[0148] Furthermore, by controlling the switch 121, beam switching can be achieved. For example, it can be implemented by switching from supporting the first frequency band using the quarter-wavelength mode of the first stub 111 to supporting the first frequency band using the half-wavelength mode of the first radiator 110; or, by switching from supporting the first frequency band using the half-wavelength mode of the first radiator 110 to supporting the first frequency band using the half-wavelength mode of the first radiator 110. This changes the radiation pattern of the first frequency band supported by the first antenna 100.

[0149] Furthermore, in one embodiment of this application, the antenna assembly 10 includes a first resonant circuit 130, which can improve the performance of the second antenna 200 and enhance the radiation efficiency of the second target frequency band supported by the second antenna 200.

[0150] The antenna assembly 10 provided in this 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 should be understood that this should not be construed as a limitation on the antenna assembly 10 provided in this application. In other embodiments, the first radiator 110 and the second radiator 210 of the antenna assembly 10 may also be set to correspond to the top edge (i.e., the first side 1a) of the electronic device 1, or to the bottom edge of the electronic device 1, or to one of the four corners of the electronic device 1, etc. This application does not limit the position of the first radiator 110 and the second radiator 210 of the antenna assembly 10.

[0151] Understandably, the description of the switching circuit 120 provided in the preceding embodiments is an example, and in other embodiments, the switching circuit 120 may also take other forms.

[0152] Please see Figure 27 , Figure 27 This is a schematic diagram of an antenna assembly provided in another embodiment of this application. In the antenna assembly 10 of this embodiment, the switching 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 terminal 121a and a second connection terminal 121b. The first connection terminal 121a is electrically connected to the other end of the first capacitor C01, and the second connection terminal 121b is electrically connected to the connection point P0. When the first connection terminal 121a and the second connection terminal 121b are electrically connected, the switching circuit 120 is in the first state. When the first connection terminal 121a and the second connection terminal 121b are disconnected, the switching circuit 120 is in the second state.

[0153] In this embodiment, the antenna assembly 10 is illustrated by the example of a first antenna 100 and a second antenna 200. It can be understood that the antenna assembly 10 may include the first antenna 100 and does not include the second antenna 200.

[0154] When the first connection terminal 121a is electrically connected to the second connection terminal 121b, the switch 121 is closed. In this embodiment, when the first connection terminal 121a and the second connection terminal 121b are electrically connected, the switch circuit 120 is equivalent to a small capacitor.

[0155] When the first connection terminal 121a is disconnected from the second connection terminal 121b, the switch 121 is turned off. In this embodiment, when the first connection terminal 121a is disconnected from the second connection terminal 121b, the switch circuit 120 is equivalent to a large inductor.

[0156] Since the equivalent devices of the switching circuit 120 are different when the switching circuit 120 is in the first state and the second state, the state of the switch 121 can be controlled so that the resonant current distribution of the first radiator 110 when the switching circuit 120 is in the first state is different from that when the switching circuit 120 is in the second state. This results in the first frequency band having a first radiation pattern when the switching circuit 120 is in the first state, and the first frequency band having a second radiation pattern when the switching circuit 120 is in the second state. The antenna assembly 10 provided in this application embodiment can realize single-antenna radiation pattern reconstruction.

[0157] Please see Figure 28 , Figure 28 This is a schematic diagram of an antenna assembly provided in yet another embodiment of this application. In the antenna assembly 10 provided in this embodiment, the switching 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 terminal 121a and a second connection terminal 121b. The first connection terminal 121a is electrically connected to the other end of the first inductor L01, and the second connection terminal 121b is electrically connected to the connection point P0. When the first connection terminal 121a and the second connection terminal 121b are disconnected, the switching circuit 120 is in the first state. When the first connection terminal 121a and the second connection terminal 121b are electrically connected, the switching circuit 120 is in the second state.

[0158] In this embodiment, the antenna assembly 10 is illustrated by the example of a first antenna 100 and a second antenna 200. It can be understood that the antenna assembly 10 may include the first antenna 100 and does not include the second antenna 200.

[0159] In this embodiment, when the first connection terminal 121a is electrically connected to the second connection terminal 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 terminal 121a is disconnected from the second connection terminal 121b, the switch 121 is open. When the switch 121 is open, the switch circuit 120 is equivalent to a first capacitor C01 and a first inductor L01 connected in series.

[0161] Since the equivalent devices of the switching circuit 120 are different when the switching circuit 120 is in the first state and the second state, the state of the switch 121 can be controlled so that the resonant current distribution of the first radiator 110 when the switching circuit 120 is in the first state is different from that when the switching circuit 120 is in the second state. This results in the first frequency band having a first radiation pattern when the switching circuit 120 is in the first state, and the first frequency band having a second radiation pattern when the switching circuit 120 is in the second state. The antenna assembly 10 provided in this application embodiment can realize single-antenna radiation pattern reconstruction.

[0162] Please see Figure 29 , Figure 29 This is a schematic diagram of an antenna assembly provided in another embodiment of this 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 feed point P1, a ground point G0, a connection point P0, and a second free end 112a arranged sequentially, wherein 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 switching 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 terminal 121a and a second connection terminal 121b. The first connection terminal 121a is electrically connected to the other end of the first inductor L01, and the second connection terminal 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 arranged sequentially. The ground end 210b is grounded, wherein the first free end 111a is disposed adjacent to the third free end 210a relative 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, the second target frequency band including 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 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 connected in series, and the first resonant circuit 130 resonates in the third frequency band.

[0164] In this embodiment, the first free end 111a is positioned closer to the third free end 210a than the second free end 112a. Therefore, the first feed 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 feed point P1. Therefore, the first resonant circuit 130 resonates in the third frequency band, thus reducing 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.

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

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

[0167] Therefore, the second antenna 200 of the antenna assembly 10 can support not only the third frequency band but also the fourth frequency band, thus meeting the communication requirements of both the third and fourth frequency bands. Furthermore, the second antenna 200 can fulfill the communication requirements of both the third and fourth frequency bands with a single antenna, requiring fewer antennas. Therefore, the second antenna 200 has a smaller size, allowing the antenna assembly 10 to be integrated with other components 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 N79 band and the WiFi 5GP band have similar frequencies; therefore, in one embodiment, the fourth band can also be the N79 band. This allows the second antenna 200 to meet the communication requirements of the N79 band.

[0171] Please see Figure 9 and Figure 30 , Figure 29 and Figure 31 , Figure 30 A schematic diagram of an antenna assembly provided in another embodiment of this application; Figure 31 This is a schematic diagram of an antenna assembly provided in yet another embodiment of this 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. The second resonant circuit 140 resonates in the fourth frequency band.

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

[0173] In this embodiment, the second resonant circuit 140 resonates in the fourth frequency band, thus reducing 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.

[0174] Furthermore, the antenna assembly 10 provided in this application embodiment, wherein the first antenna 100 includes a second resonant circuit 140, 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 present invention, for 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 higher-order modes. If the energy of the first radiator 110 coupling the energy of the second radiator 210 generates higher-order modes, the system radiation efficiency of the fourth frequency band of the second target frequency band will be reduced. Therefore, the antenna assembly 10 provided in this application embodiment, wherein the first antenna 100 includes a second resonant circuit 140, and the second resonant circuit 140 resonates in the fourth frequency band, can improve the system radiation efficiency of the fourth frequency band.

[0175] Please see Figure 32 , Figure 32This is a schematic diagram of an antenna assembly provided in yet another embodiment of this 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 point S1, and a switching 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 sequentially, wherein the ground point G0 is grounded. The first feed point S1 is electrically connected to the first feed point P1 to excite the first radiator 110 to support a first target frequency band. Furthermore, the antenna assembly 10 also includes a second antenna 200, which includes a second radiator 210 and a second feed point S2. The second radiator 210 has a second feed point P2. The second feed point S2 is electrically connected to the second feed point P2 to excite the second radiator 210 to support a second target frequency band, which 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 a first frequency band. The switching 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 terminal 121a, a second connection terminal 121b, and a common terminal 121e. The first connection terminal 121a is electrically connected to the other end of the first inductor L01, and the second connection terminal 121b is electrically connected to the other end of the first resonant circuit 130. When the common terminal 121e is disconnected from the first connection terminal 121a, and the common terminal 121e is electrically connected to the second connection terminal 121b, the switching 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 switching 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 terminal 121a is electrically connected to the other end of the first inductor L01, and the second connection terminal 121b is electrically connected to the other end of the first resonant circuit 130. When the common terminal 121e is disconnected from the first connection terminal 121a and is electrically connected to the second connection terminal 121b, the switching circuit 120 is in the first state; when the common terminal 121e is electrically connected to the first connection terminal 121a and is disconnected from the second connection terminal 121b, the switching circuit 120 is in the second state. Therefore, 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. This results in the first frequency band having a first radiation pattern when the switch circuit 120 is in the first state, and the first frequency band having a second radiation pattern when the switch circuit 120 is in the second state. The antenna assembly 10 provided in this application embodiment can realize pattern reconstruction of a single antenna.

[0178] In this embodiment, the first antenna 100 includes a first resonant circuit 130, which 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] Furthermore, the antenna assembly 10 provided in this embodiment, where the first antenna 100 includes a first resonant circuit 130, 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 higher-order modes. If the first radiator 110 couples the energy of the second radiator 210 and generates higher-order modes, the system radiation efficiency of the third frequency band of the second target frequency band will be reduced. Thus, the antenna assembly 10 provided in this embodiment, where the first antenna 100 includes a first resonant circuit 130 resonating in the third frequency band, can improve the system radiation efficiency of the third frequency band.

[0180] Please see Figure 33 , Figure 33This is a schematic diagram of an antenna assembly provided in yet another embodiment of this application. In this embodiment, the first target frequency band further includes a second frequency band. The switching circuit 120 is also used to adjust the radiation pattern of the second frequency band supported by the first radiator 110. The switching circuit 120 has a third state and a fourth state. When the switching circuit 120 is in the third state, the first radiator 110 has a third radiation pattern in the second frequency band; when the switching circuit 120 is in the fourth state, the first radiator 110 has a fourth radiation pattern in the second frequency band, wherein the third radiation pattern is different from the fourth radiation pattern.

[0181] The resonant current of the first radiator 110 when the switching circuit 120 is in the third state is different from the resonant current distribution of the first radiator 110 when the switching circuit 120 is in the fourth state. When the switching circuit 120 is in the third state, the first radiator 110 has a third radiation pattern in the second frequency band; when the switching circuit 120 is in the fourth state, the first radiator 110 has a fourth radiation pattern in the second frequency band. The antenna assembly 10 provided in this application embodiment can realize single antenna radiation pattern reconstruction. In the second frequency band, the third radiation pattern of the antenna assembly 10 in the third state and the fourth radiation pattern of the antenna assembly 10 in the fourth state are different, which can effectively form radiation pattern complementarity. In one embodiment, the region with weak signal in the third radiation pattern of the antenna assembly 10 in the third state will be covered by the region with strong signal in the radiation pattern of the antenna assembly 10 in the fourth state. Correspondingly, in the second frequency band, the region with weak signal in the fourth radiation pattern of the antenna assembly 10 in the fourth state will be covered by the region with strong signal in the third radiation pattern of the antenna assembly 10 in the third state. Therefore, by adjusting the state of the switching circuit 120, the antenna assembly 10 can achieve better communication performance in the second frequency band, thereby improving the communication experience when the antenna assembly 10 supports the second frequency band. Thus, the antenna assembly 10 provided in this embodiment has better communication performance in the second frequency band. Furthermore, since the radiation pattern of the second frequency band can be reconstructed using a single antenna assembly 10, it is unnecessary to use multiple antenna assemblies 10 to reconstruct the radiation pattern of the second frequency band. Therefore, the antenna assembly 10 provided in this embodiment helps save on the cost of the antenna assembly 10 and saves space in the electronic device 1 in which the antenna assembly 10 is applied. When the antenna assembly 10 is applied in the electronic device 1, it facilitates layout with other components of the electronic device 1.

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

[0183] Furthermore, the second target frequency band also includes a fourth frequency band. The switching 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, and the first resonant circuit 130 includes a second resonant inductor L22 and a second resonant capacitor C22 connected in series. 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 switching 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 switching circuit 120 is in the fourth state.

[0184] Therefore, 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 third state can be different from that when the switch circuit 120 is in the fourth state. This results in the second frequency band having a third radiation pattern when the switch circuit 120 is in the third state, and a fourth radiation pattern when the switch circuit 120 is in the fourth state. The antenna assembly 10 provided in this application embodiment can realize single-antenna radiation pattern reconstruction.

[0185] In addition, the switching 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 radiation pattern of the second frequency band supported by the first antenna 100 can be adjusted.

[0186] Furthermore, this application also provides an electronic device 1. The electronic device 1 includes, but is not limited to, devices capable of transmitting and receiving electromagnetic wave signals, such as mobile phones, telephones, televisions, tablets, cameras, personal computers, laptops (PCs), in-vehicle devices, headphones, watches, wearable devices, base stations, vehicle radars, and customer premises equipment (CPEs). In this application, a mobile phone is used as an example of the electronic device 1; other devices can be referred to the specific descriptions in this application. The electronic device 1 may include an antenna assembly 10 as described in any of the preceding embodiments. The antenna assembly 10 is described in the preceding description and will not be repeated here.

[0187] Please see Figure 34 and Figure 35 , Figure 34 A schematic diagram of an electronic device provided according to one embodiment of this application; Figure 35 for Figure 34 A partial structural diagram of the electronic device 1 is shown. The electronic device 1 also includes a display screen 70, a mid-frame 30, and a housing 90 (also called a battery cover). The display screen 70 and the housing 90 are respectively disposed on opposite sides of the mid-frame 30. The mid-frame 30 includes a frame body 310 and a frame edge 320. In this embodiment, the frame body 310 can serve as a ground electrode. The frame edge 320 surrounds the periphery of the frame body 310. The first radiator 110 of the antenna assembly 10 is formed on the frame edge 320. When the antenna assembly 10 also includes a second radiator 210, the second radiator 210 is also formed on the frame edge 320.

[0188] The middle frame 30 is typically conductive, for example, made of a metal (such as aluminum or an aluminum-magnesium alloy). In the electronic device 1, the middle frame 30 is typically used to support the display screen 70 and the housing 90. Because the middle frame 30 is conductive, it can also serve as a ground electrode. Components in the electronic device 1 can be directly or indirectly connected to the middle frame 30 for grounding.

[0189] Furthermore, in one embodiment, the mid-frame 30, the housing 90, and at least one of the display screen 70 form a receiving space. The electronic device 1 also includes a battery and functional devices (which may include one or more of a camera module, microphone, receiver, speaker, face recognition module, and fingerprint recognition module) disposed within the receiving space, capable of realizing the basic functions of a mobile phone; these will not be described in detail in this embodiment. It is understood that the above description of the electronic device 1 is merely an illustration of one environment in which the antenna assembly 10 is applied, and the specific structure of the electronic device 1 should not be construed as a limitation on the antenna assembly 10 provided in this application. In other embodiments, the electronic device 1 may also not include at least one of the display screen 70 and the housing 90.

[0190] Please continue reading. Figure 34 and Figure 35 The electronic device 1 has a first side 1a and a second side 1b that 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 portrait mode, the first side 1a is located at the top of the electronic device 1, and the second side 1b is located on the side of the electronic device 1. The first radiator 110 is positioned adjacent to the first side 1a on the second side 1b of the electronic device 1. Thus, when the electronic device 1 is in portrait mode, it is less likely to obstruct the first radiator 110 when holding the electronic device 1 with one hand, thereby enabling the antenna assembly 10 to have better antenna performance in the first target frequency band. Furthermore, when the antenna assembly 10 also includes a second antenna 200, the second radiator 210 of the second antenna 200 is also positioned adjacent to the first side 1a on the second side 1b.

[0191] Please continue reading. Figure 34 The electronic device 1 also has a third side 1c. The third side 1c is bent and connected to the second side 1b, and the third side 1c is positioned opposite to the first side 1a. When the electronic device 1 is in portrait mode, the third side 1c is located at the bottom of the electronic device 1. Figure 34 and Figure 35The electronic device shown, with the first radiator 110 positioned corresponding to the portion of the second side 1b adjacent to the first side 1a, should not be construed as limiting the electronic device 1 provided in this application. In other embodiments, the first radiator 110 may also be positioned corresponding to other locations of the second side 1b. Alternatively, in other embodiments, the first radiator 110 may also be positioned corresponding to the first side 1a. Alternatively, in other embodiments, the first radiator 110 may also be positioned corresponding to the third side 1c. Since 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 when the electronic device 1 is in portrait mode, when the first radiator 110 is positioned corresponding to the first side 1a, it can also be considered that the first radiator 110 is positioned at the top of the electronic device 1 in portrait mode; when the first radiator 110 is positioned corresponding to the third side 1c, it can also be considered that the first radiator 110 is positioned at the bottom of the electronic device 1 in portrait mode.

[0192] Please see Figure 36 , Figure 36 This is a circuit block diagram of an electronic device provided according to one embodiment of the present application. In one embodiment, when the electronic device 1 is in portrait mode, it is less likely to block the second radiator 210 when holding the electronic device 1 with one hand, thereby enabling the antenna assembly 10 to have 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 switching circuit 120 and is used to control the state of the switching circuit 120. When the switching circuit 120 is in a first state, the antenna assembly 10 has a first performance in the first frequency band; when the switching circuit 120 is in a 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 switching 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 switching circuit 120 to switch to the second state or maintain the second state.

[0194] The electronic device 1 provided in this application embodiment also includes a processor 50 that can be integrated into the antenna assembly 10 provided in any of the preceding embodiments. In the schematic diagram of this embodiment, the example shown is that the electronic device 1 also includes a processor 50 integrated into the antenna assembly 10 provided in the preceding embodiment. It should be understood that this should not be construed as a limitation on the antenna assembly 10 provided in this application embodiment.

[0195] Therefore, the electronic device 1 provided in this application embodiment can compare the first performance and the second performance of the antenna assembly 10, and then control the state of the switch 121, so that the antenna assembly 10 has better performance when supporting the first frequency band.

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

[0197] Therefore, the electronic device 1 provided in this application embodiment allows the processor 50 to compare the third and fourth performance of the antenna assembly 10, thereby controlling the state of the switch 121, so that the antenna assembly 10 has better performance when supporting the second frequency band.

[0198] The above description represents some embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes a first antenna and a second antenna, wherein the first antenna includes: A first radiator, comprising a first free end and a second free end, and a first feed point, a grounding point and a connection point arranged sequentially between the first free end and the second free end, wherein the first feed point is located closer to the first free end than the connection point, and the grounding point is grounded; A first feed source, electrically connected to the first feed point, to excite the first radiator to support a first target frequency band, the first target frequency band including a first frequency band; and A switching circuit, wherein the switching circuit is electrically connected to the connection point; The switching circuit is used to adjust the radiation pattern of the 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, 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. The second antenna includes: The second radiator, the second feed point of the second radiator; and A second feed source, electrically connected to the second feed point, is used to excite the second radiator to support a second target frequency band, the second target frequency band including a third frequency band; The first antenna also includes: A first resonant circuit, one end of which is grounded, the first resonant circuit includes 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 switching circuit includes: The first inductor, one end of which is grounded; A switch, comprising a first connection terminal, a second connection terminal, and a common terminal, wherein the first connection terminal is electrically connected to the other end of the first inductor, and the second connection terminal is 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 switching 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 switching circuit is in the second state.

2. The antenna assembly as claimed in claim 1, characterized in that, The first feed source excites the first radiator to generate a first resonant mode, a second resonant mode, and a third resonant mode to support the first target frequency band; The first resonant mode corresponds to the first resonant frequency f1, the second resonant mode corresponds to the second resonant frequency f2, and the third resonant mode corresponds to the third resonant frequency f3, where f1 < f2 < f3. When the switching circuit is in the first state, the first resonant mode supports the first frequency band and has a first radiation pattern; When the switching circuit is in the second state, the second resonant mode supports the first frequency band and has a second radiation pattern.

3. The antenna assembly as described in claim 2, characterized in that, The first target frequency band also includes a second frequency band.

4. The antenna assembly as described in claim 3, characterized in that, The first frequency band includes the WiFi 2.4G frequency band, and the second frequency band includes the MHB frequency band.

5. The antenna assembly as claimed in claim 2, characterized in that, The first radiator includes a first branch and a second branch. The first branch includes the portion of the first radiator located between the first free end and the grounding point, and the second branch includes the portion of the first radiator located between the second free end and the grounding point. The first resonant mode is the quarter-wavelength mode of the first stub; The second resonant mode is the half-wavelength dipole mode of the first radiator stub; The third resonant mode is the quarter-wavelength mode of the second stub.

6. The antenna assembly as claimed in claim 2, characterized in that, The switching circuit includes: A first inductor, one end of which is grounded; and A switch, the switch including a first connection terminal and a second connection terminal, the first connection terminal being electrically connected to the other end of the first inductor, and the second connection terminal being electrically connected to the connection point; When the first connection terminal is electrically connected to the second connection terminal, the switching circuit is in the first state; When the first connection terminal is disconnected from the second connection terminal, the switching circuit is in the second state.

7. The antenna assembly as claimed in claim 6, characterized in that, The antenna assembly further includes a second antenna, the second antenna comprising: The second radiator includes a third free end, a second feed point, and a grounding end arranged sequentially, wherein the grounding end is grounded, and the second free end is disposed adjacent to the third free end relative to the first free end; and A second feed source, electrically connected to the second feed point, is used to excite the second radiator to support a second target frequency band, the second target frequency band including a third frequency band; The first antenna also includes: A first resonant circuit, one end of which 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, and the first resonant circuit resonates in the third frequency band.

8. The antenna assembly as claimed in claim 6, characterized in that, The antenna assembly further includes a second antenna, the second antenna comprising: The second radiator includes a third free end, a second feed point, and a grounding end arranged sequentially, wherein the grounding end is grounded, and the first free end is disposed adjacent to the third free end relative to the second free end; and A second feed source, electrically connected to the second feed point, is used to excite the second radiator to support a second target frequency band, the second target frequency band including a third frequency band; The first antenna also includes: The first resonant circuit has one end grounded and the other end electrically connected to the first feed 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.

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

10. The antenna assembly as claimed in claim 9, characterized in that, The third frequency band includes the N78 frequency band, and the fourth frequency band includes the WiFi 5G frequency band.

11. The antenna assembly as claimed in 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 includes a second resonant inductor and a second resonant capacitor connected in series. The second resonant circuit resonates in the fourth frequency band.

12. The antenna assembly as claimed in claim 2, characterized in that, The switching circuit includes: The 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 including a first connection terminal and a second connection terminal, the first connection terminal being electrically connected to the other end of the first capacitor, and the second connection terminal being electrically connected to the connection point; When the first connection terminal is electrically connected to the second connection terminal, the switching circuit is in the first state; When the first connection terminal is disconnected from the second connection terminal, the switching circuit is in the second state.

13. The antenna assembly as claimed in claim 2, characterized in that, The switching circuit includes: The 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 including a first connection terminal and a second connection terminal, the first connection terminal being electrically connected to the other end of the first inductor, and the second connection terminal being electrically connected to the connection point; When the first connection terminal is disconnected from the second connection terminal, the switching circuit is in the first state; When the first connection terminal is electrically connected to the second connection terminal, the switching circuit is in the second state.

14. The antenna assembly as claimed in claim 1, characterized in that, 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. The third radiation pattern is different from the fourth radiation pattern.

15. The antenna assembly as claimed in claim 14, characterized in that, The second target frequency band also includes a fourth frequency band; the switching circuit includes: The second inductor, one end of which is grounded; The first antenna also includes: The second resonant circuit has one end grounded. The first resonant circuit includes a second resonant inductor and a second resonant capacitor connected in series. The second resonant circuit resonates in the fourth frequency band. The switch further includes a third connection terminal and a fourth connection terminal, the third connection terminal being electrically connected to the other end of the second inductor, and the fourth connection terminal being 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 switching 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 switching circuit is in the fourth state.

16. An electronic device, characterized in that, The electronic device includes an antenna assembly as described in any one of claims 1-15.

17. The electronic device as claimed in claim 16, characterized in that, The electronic device has a first side and a second side that are bent and connected together, wherein the length of the second side is greater than the length of the first side; The first radiator is positioned at a location adjacent to the first side on the second side.

18. The electronic device as claimed in claim 16, characterized in that, The electronic device also includes: A processor electrically connected to the switching circuit, the processor controlling the state of the switching circuit, wherein when the switching circuit is in a first state, the antenna assembly has a first performance in the first frequency band; and when the switching 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 switching 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 switching circuit to switch to the second state or maintain the second state.

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