Antenna and electronic equipment

Abstract

The invention discloses an antenna and electronic equipment. The antenna comprises a radiator, a feed source and a first matching circuit. The radiating body is provided with a grounding end, a feeding point, a connecting point and a free end which are arranged in sequence, and the distance between the feeding point and the free end is smaller than the distance between the feeding point and the grounding end; the feed source is electrically connected to the feed point; one end of the first matching circuit is electrically connected to the connection point, the other end is grounded, the first matching circuit has first and second states, and matching parameters are different when the first matching circuit is in the first and second states; if the first matching circuit is in a first state, the feed source excites a part between the grounding end of the radiator and the connection point to support a first resonance mode of a target frequency band, and the first resonance mode corresponds to a first directional diagram; and if the first matching circuit is in a second state, the feed source excites a part between the feeding point and the free end of the radiator to support a second resonance mode of the target frequency band, the second resonance mode corresponds to a second directional diagram, and the first directional diagram is different from the second directional diagram.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to an antenna and an electronic device. BACKGROUND

[0002] With the development of technology, the popularity of electronic devices with communication function such as mobile phones is higher and higher, and the function is more and more powerful. The electronic device usually includes an antenna assembly to realize the communication function of the electronic device. However, the coverage range of the antenna in the related art electronic device is small, and the communication function of the antenna is relatively weak. SUMMARY

[0003] In a first aspect, an embodiment of the present application provides an antenna, which comprises:

[0004] a radiator having a ground end, a feed point, a connection point and a free end arranged in sequence, the ground end being grounded, and a distance between the feed point and the free end being smaller than a distance between the feed point and the ground end;

[0005] a feed source electrically connected to the feed point; and

[0006] a first matching circuit having one end electrically connected to the connection point and the other end grounded, the first matching circuit having a first state and a second state, and matching parameters of the first matching circuit in the first state and the second state being different;

[0007] if the first matching circuit is in the first state, the feed source excites a part of the radiator between the ground end and the connection point to support a first resonant mode of a target frequency band, and the first resonant mode corresponds to a first directional pattern;

[0008] if the first matching circuit is in the second state, the feed source excites a part of the radiator between the feed point and the free end to support a second resonant mode of the target frequency band, and the second resonant mode corresponds to a second directional pattern, wherein the first directional pattern is different from the second directional pattern.

[0009] In a second aspect, an embodiment of the present application provides an electronic device, which comprises the antenna as described in the first aspect.

[0010] In summary, the antenna provided by the embodiment of the present application has a radiator with a ground end, a feed point, a connection point and a free end arranged in sequence. By arranging the feed point and the connection point, the boundary conditions for exciting the first resonant mode and the second resonant mode are constructed. In combination with the first state and the second state of the first matching circuit, the antenna has different directional patterns for the target frequency band in the first state and the second state. Specifically, if the first matching circuit is in the first state, the feed source excites the part of the radiator between the ground end and the connection point to support the first resonant mode of the target frequency band, and the first resonant mode corresponds to a first directional pattern. If the first matching circuit is in the second state, the feed source excites the part of the radiator between the feed point and the free end to support the second resonant mode of the target frequency band, and the second resonant mode corresponds to a second directional pattern. The first directional pattern is different from the second directional pattern. Therefore, the state of the first matching circuit can be controlled to control the directional pattern of the antenna for the target frequency band. As can be seen, the antenna of the embodiment of the present application can realize a relatively wide range of coverage of the directional pattern of the target frequency band, and further has good performance when communicating by using the target frequency band. Further, the distance between the feed point and the free end is less than the distance between the feed point and the ground end. Therefore, the resonant frequency point of the target frequency band supported by the first resonant mode of the antenna is the same as or approximately the same as the resonant frequency point of the target frequency band supported by the second resonant mode, so that the antenna can maintain a relatively stable frequency band when switching from the target frequency band supported by the first resonant mode to the target frequency band supported by the second resonant mode, and can maintain a relatively stable frequency band when switching from the target frequency band supported by the second resonant mode to the target frequency band supported by the first resonant mode. Therefore, the antenna has good performance in the target frequency band. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0012] Figure 1 a schematic diagram of an antenna in the related art;

[0013] Figure 2 a schematic diagram of an antenna in the related art; Figure 1 a schematic diagram of resonant current of an antenna in the related art;

[0014] Figure 3A schematic diagram of an antenna provided according to one embodiment of this application;

[0015] Figure 4 for Figure 3 A schematic diagram showing the dimensions of the middle section of the structure;

[0016] Figure 5 A schematic diagram of an antenna provided for another embodiment of this application;

[0017] Figure 6 A schematic diagram of an antenna provided for yet another embodiment of this application;

[0018] Figure 7 A schematic diagram of an antenna provided for yet another embodiment of this application;

[0019] Figure 8 for Figure 3 A schematic diagram of the resonant current of the antenna in the first resonant mode is provided.

[0020] Figure 9 for Figure 3 A schematic diagram of the resonant current of the antenna in the second resonant mode is provided.

[0021] Figure 10 for Figure 6 A schematic diagram of the resonant current of the antenna in the first resonant mode is provided.

[0022] Figure 11 for Figure 6 A schematic diagram of the resonant current of the antenna in the second resonant mode is provided.

[0023] Figure 12 A schematic diagram of the first matching circuit of an antenna provided in one embodiment of this application;

[0024] Figure 13 A schematic diagram of the first matching circuit of an antenna provided in another embodiment of this application;

[0025] Figure 14 A schematic diagram of the first matching circuit of the antenna provided in another embodiment of this application;

[0026] Figures 15 to 24 These are schematic diagrams of the third sub-matching circuits included in the second matching circuits provided in various embodiments;

[0027] Figure 25 A schematic diagram of the S-parameters and efficiency of an antenna provided in one embodiment of this application;

[0028] Figure 26 When the electronic device for antenna application provided in one embodiment of this application is in portrait mode, the antenna supports a first radiation pattern of the target frequency band in the first resonant mode.

[0029] Figure 27 for another perspective of the electronic device in Figure 26 ;

[0030] Figure 28 for another perspective of the electronic device in ;

[0031] Figure 29 for another perspective of the electronic device in Figure 28 ;

[0032] Figure 30 for another perspective of the electronic device in ;

[0033] Figure 31 for another perspective of the electronic device in ;

[0034] Figure 32 for another perspective of the electronic device in ;

[0035] Figure 33 for another perspective of the electronic device in ;

[0036] Figure 34 for another perspective of the electronic device in Figure 33 ;

[0037] Figure 35 for another perspective of the electronic device in ;

[0038] Main element number explanation

[0039] Electronic device 1, first side 1a, second side 1b, third side 1c

[0040] Antenna 10, radiator 100, ground terminal 101, feed point P1, connection point P2, free end 102, feed source S

[0041] First matching circuit 110, switching switch 111, first sub-matching circuit 112, second sub-matching circuit 113, first sub-switch 1111, second sub-switch 1112, first connection end 1111a, second connection end 1111b, third connection end 1112a, fourth connection end 1112b, switch 1113, sub-matching circuit 1114, first end 1113a, second end 1113b

[0042] Second matching circuit 120, third sub-matching circuit 121

[0043] capacitor C0, inductor L0, series unit 1222, parallel unit 1221, first capacitor C1, second capacitor C2, first inductor L1, second inductor L2, first parallel unit 1221a, second parallel unit 1221b, first series unit 1222a, second series unit 1222b;

[0044] detection module 20, middle frame 30, frame body 310, frame edge 320, control module 50, display screen 60, back cover 70, ground electrode 80. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. In addition, the phrase "embodiment" or "implementation" in the present application means that the specific features, structures or characteristics described in connection with the embodiment or implementation can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present application can be combined with other embodiments. It should be noted that, for the sake of brevity, the same reference signs are used to represent the same components in the embodiments of the present application, and detailed description of the same components is omitted in different embodiments for the sake of brevity.

[0046] The terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0047] Before introducing the antenna 10 and the electronic device 1 provided by the embodiments of the present application, the antenna 10 of the related art is described in detail. It can be understood that the antenna 10 of the related art is the antenna 10 before the antenna 10 provided by the embodiments of the present application is improved, and should not be understood as the antenna 10 of the prior art.

[0048] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic view of an antenna in the related art; Figure 2 is Figure 1The shown is a schematic diagram of a resonant current of an antenna supporting a target frequency band in the related art. In the related art, the antenna 10 includes a radiator 100, a matching circuit M, and a feed S. The radiator 100 includes a grounded end 101, a feed point P1, and a free end 102. The grounded end 101 is electrically connected to the ground pole 80 for grounding. The free end 102 can also be referred to as a terminal end. The feed S electrically connects the matching circuit M to the feed point P1 to excite the antenna 10 to support the target frequency band. The matching circuit M is used to change the equivalent electrical length of the antenna 10 to achieve support for multiple frequency bands. For example, the matching circuit M includes a switching switch and a plurality of matching devices. The switching switch is electrically connected to different matching devices in the plurality of matching devices to achieve support for different frequency bands. In the related art, the feed S excites a 1 / 4 wavelength mode (i.e., a quarter wavelength mode) of the radiator 100 to support the target frequency band. The resonant mode corresponds to a resonant current I0 from the grounded end 101 of the radiator 100 to the free end 102 of the radiator 100.

[0049] As can be seen, the antenna 10 in the related art can only generate one resonant mode when supporting the target frequency band, and therefore, the directional pattern of the target frequency band is fixed and cannot be changed. Therefore, the coverage range of the antenna 10 in the related art when supporting the target frequency band is relatively small, and therefore, the communication function of the antenna 10 in the related art in the target frequency band is relatively weak.

[0050] Next, the antenna 10 and the electronic device 1 provided by the embodiments of the present application are described in detail.

[0051] Please refer to Figure 3 and Figure 4 , Figure 3 a schematic diagram of an antenna provided by an embodiment of the present application; Figure 4 is Figure 3A schematic diagram of the size of the middle part structure. The antenna 10 includes a radiator 100, a feed source S and a first matching circuit 110. The radiator 100 has a ground end 101, a feed point P1, a connection point P2 and a free end 102 arranged in sequence. The ground end 101 is grounded, and the distance between the feed point P1 and the free end 102 is less than the distance between the feed point P1 and the ground end 101. The feed source S is electrically connected to the feed point P1. One end of the first matching circuit 110 is electrically connected to the connection point P2, and the other end is grounded (e.g., electrically connected to the ground pole 80 to be grounded). The first matching circuit 110 has a first state and a second state, and the matching parameters of the first matching circuit 110 in the first state and the second state are different. If the first matching circuit 110 is in the first state, the feed source S excites the part of the radiator 100 between the ground end 101 and the connection point P2 to support a first resonant mode of the target frequency band, and the first resonant mode corresponds to a first directional pattern. If the first matching circuit 110 is in the second state, the feed source S excites the part of the radiator 100 between the feed point P1 and the free end 102 to support a second resonant mode of the target frequency band, and the second resonant mode corresponds to a second directional pattern, wherein the first directional pattern is different from the second directional pattern.

[0052] The radiator 100 can be a laser direct structuring (LDS), or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna 10 is applied to the electronic device 1, the radiator 100 can be a mechanical design antenna (MDA) radiator designed by using the insert metal of the electronic device 1 itself. For example, the radiator 100 can be an antenna 10 radiator 100 designed by using the middle frame 30 (see Figures 33 to 35 ) formed by the plastic and metal of the electronic device 1. In addition, the radiator 100 can also be a metal edge frame radiator 100 designed by metal middle frame. If the radiator 100 receives a radio frequency signal of a target frequency band, the radiator 100 emits an electromagnetic wave signal of the target frequency band according to the radio frequency signal of the target frequency band.

[0053] If the antenna 10 is applied to the electronic device 1 (see Figures 33 to 35The ground of the electronic device 1 includes but is not limited to a ground formed by the middle frame 30 of the electronic device 1, or a ground in a circuit board of the electronic device 1, or a ground in a shielding member of the display screen 60 of the electronic device 1, or a ground formed by the back cover 70 of the electronic device 1 when the back cover 70 is conductive. The ground of the electronic device 1 is not limited in the present application.

[0054] The ground end 101 is grounded, which can be but is not limited to that the ground end 101 is electrically connected to the ground through a grounding member. The grounding member can be but is not limited to a conductive spring, or conductive glue, or a conductive wire, or a conductive connecting rib of the middle frame 30, etc.

[0055] In the embodiment, the distance between the feeding point P1 and the free end 102 is identified as a first distance d1, and the distance between the feeding point P1 and the ground end 101 is identified as a second distance d2, wherein the distance between the feeding point P1 and the free end 102 is less than the distance between the feeding point P1 and the ground end 101; that is, d1 < d2.

[0056] The feed source S is used to generate an excitation signal of a target frequency band. The feed source S is used to excite the radiator 100 to generate an electromagnetic wave signal of a target frequency band. In an embodiment, the target frequency band includes a low frequency band, or a medium frequency band, or a high frequency band, or an ultra-high frequency band, or a WiFi 2.4G frequency band, or a WiFi 5G frequency band. The target frequency band includes a low frequency band, or a medium frequency band, or a high frequency band, or an ultra-high frequency band, or a WiFi 2.4G frequency band, or a WiFi 5G frequency band; in this way, the communication of the low frequency band, or the medium frequency band, or the high frequency band, or the ultra-high frequency band, or the WiFi 2.4G frequency band, or the WiFi 5G frequency band can be realized.

[0057] In another embodiment, the target frequency band includes but is not limited to N78 frequency band, or N79 frequency band, or WiFi 5G frequency band.

[0058] The target frequency band includes but is not limited to N78 frequency band, or N79 frequency band, or WiFi 5G frequency band, which can enable the antenna 10 to meet the communication function of the N78 frequency band, or the N79 frequency band, or the WiFi 5G frequency band.

[0059] One end of the first matching circuit 110 is electrically connected to the connection point P2, and the other end is grounded. The first matching circuit 110 has a first state and a second state. In an embodiment, if the first matching circuit 110 is in the first state, the first matching circuit 110 is small impedance (also referred to as low impedance); if the first matching circuit 110 is in the second state, the first matching circuit 110 is large impedance (also referred to as high impedance).

[0060] Impedance is a complex number, which is composed of a real part and an imaginary part. In general, the impedance with an imaginary part less than 20 is regarded as a small impedance; and the impedance with an imaginary part greater than or equal to 20 is regarded as a large impedance.

[0061] The small impedance (also referred to as a low impedance) includes a small inductance, or a large capacitance, or a short circuit. Therefore, the first matching circuit 110 is in a first state, and the first matching circuit 110 includes a small inductance, or a large capacitance, or a direct connection (i.e., a short circuit). In an embodiment, the inductance value of the small inductance is less than 5 nH. For example, the inductance value of the small inductance can be 1 nH, or 2 nH, or 3 nH, etc. In an embodiment, the capacitance value of the large capacitance is greater than 2 pF. For example, the capacitance value of the large capacitance can be 5 pF, or 8 pF, or 10 pF, etc.

[0062] The large impedance (also referred to as a high impedance) includes a large inductance, or a small capacitance, or an open circuit. Therefore, the first matching circuit 110 is in a second state, and the first matching circuit 110 includes a large inductance, or a small capacitance, or an open circuit. In an embodiment, the inductance value of the large inductance is greater than or equal to 5 nH. For example, the inductance value of the large inductance can be, but is not limited to, 8 nH, or 10 nH, or 20 nH, or 30 nH, etc. In an embodiment, the capacitance value of the small capacitance is less than or equal to 2 pF. For example, the capacitance value of the small capacitance can be 2 pF, or 1 pF, or 0.5 pF, etc.

[0063] In an embodiment, the first resonant mode can also be referred to as "Mode 1", and the second resonant mode can also be referred to as "Mode 2". If the first matching circuit 110 is in the first state, the feed source S excites the radiating body 100 at a position between the ground end 101 and the connection point P2 to support a first resonant mode of a target frequency band, and the first resonant mode corresponds to a first directional pattern; if the first matching circuit 110 is in the second state, the feed source S excites the radiating body 100 at a position between the feed point P1 and the free end 102 to generate a second resonant mode supporting the target frequency band, and the second resonant mode corresponds to a second directional pattern, wherein the first directional pattern is different from the second directional pattern; therefore, by controlling the state of the first matching circuit 110, the directional pattern of the antenna 10 supporting the target frequency band can be controlled. As can be seen, the antenna 10 of the embodiment of the present application can realize a relatively large range of coverage of the directional pattern of the target frequency band, and further enables the antenna 10 to have a better performance when communicating using the target frequency band.

[0064] In addition, the antenna 10 provided by the embodiment of the present application, the feed source S excites the radiator 100 at a position between the ground point and the connection point P2 to support a first resonant mode of a target frequency band, and thus it can be seen that the connection point P2 of the radiator 100 is one of the boundary conditions for defining the first resonant mode. The feed source S excites the radiator 100 at a position between the feed point P1 and the free end 102 to generate a second resonant mode supporting the target frequency band, and thus it can be seen that the feed point P1 of the radiator 100 is one of the boundary conditions for defining the second resonant mode.

[0065] The antenna 10 provided by the embodiment of the present application, the radiator 100 of the antenna 10 has the ground end 101, the feed point P1, the connection point P2 and the free end 102 arranged in sequence. By arranging the feed point P1 and the connection point P2, the boundary conditions for exciting the first resonant mode and the second resonant mode can be constructed. In combination with the first state and the second state of the first matching circuit 110, the feed source S excites different first resonant modes and second resonant modes in the first state of the first matching circuit 110 and in the second state of the first matching circuit 110, and thus the antenna 10 has different directional patterns in the target frequency band.

[0066] The distance between the feed point P1 and the free end 102 is identified as a first distance d1, and the distance between the feed point P1 and the free end 102 is identified as a second distance d2, wherein the distance between the feed point P1 and the free end 102 is less than the distance between the feed point P1 and the ground end 101; that is, d1 < d2; which can make the resonant frequency of the target frequency band excited by the first resonant mode equal or approximately equal to the resonant frequency of the target frequency band excited by the second resonant mode. In turn, when the target frequency band supported by the antenna 10 by the first resonant mode is switched to the target frequency band supported by the second resonant mode, it can also maintain a relatively stable frequency band; and when the target frequency band supported by the antenna 10 by the second resonant mode is switched to the target frequency band supported by the first resonant mode, it can also maintain a relatively stable frequency band; and thus the antenna 10 has good performance in the target frequency band.

[0067] In summary, the antenna 10 provided by the embodiment of the present application, the radiator 100 of the antenna 10 has the ground terminal 101, the feeding point P1, the connecting point P2 and the free terminal 102 arranged in sequence. By arranging the feeding point P1 and the connecting point P2, the boundary condition for exciting the first resonant mode and the second resonant mode can be constructed. In combination with the first state and the second state of the first matching circuit 110, the antenna 10 supports different directional patterns of the target frequency band in the first state and the second state. Specifically, if the first matching circuit 110 is in the first state, the feeding source S excites the part of the radiator 100 between the ground terminal 101 and the connecting point P2 to support the first resonant mode of the target frequency band, and the first resonant mode corresponds to the first directional pattern. If the first matching circuit 110 is in the second state, the feeding source S excites the part of the radiator 100 between the feeding point P1 and the free terminal 102 to support the second resonant mode of the target frequency band, and the second resonant mode corresponds to the second directional pattern. The first directional pattern is different from the second directional pattern. Therefore, the state of the first matching circuit 110 can be controlled to further control the directional pattern of the antenna 10 when the antenna 10 supports the target frequency band. As can be seen, the antenna 10 of the embodiment of the present application can realize a relatively wide range of coverage of the directional pattern of the target frequency band, and further enables the antenna 10 to have a better performance when communicating by using the target frequency band. Further, the distance between the feeding point P1 and the free terminal 102 is less than the distance between the feeding point P1 and the ground terminal 101. Therefore, the resonant frequency point of the target frequency band supported by the first resonant mode of the antenna 10 is the same as or approximately the same as the resonant frequency point of the target frequency band supported by the second resonant mode, so that the antenna 10 can maintain a relatively stable frequency band when switching from the target frequency band supported by the first resonant mode to the target frequency band supported by the second resonant mode, and can maintain a relatively stable frequency band when switching from the target frequency band supported by the second resonant mode to the target frequency band supported by the first resonant mode, so that the antenna 10 has a better performance in the target frequency band.

[0068] Please refer to Figure 5 , Figure 5 is a schematic diagram of an antenna provided by another embodiment of the present application. The antenna 10 in the embodiment is basically the same as the antenna 10 provided by the corresponding embodiment. Figure 3 The difference between the antenna 10 in the embodiment and the antenna 10 provided by the corresponding embodiment is that the antenna 10 in the embodiment further includes a second matching circuit 120. One end of the second matching circuit 120 is electrically connected to the feeding source S, and the other end of the second matching circuit 120 is electrically connected to the feeding point P1. The second matching circuit 120 is used to adjust the target frequency band supported by the antenna 10.

[0069] For example, in one embodiment, the second matching circuit 120 comprises a switchable switch and a third sub-matching circuit 121 (see Figures 15 to 24 ). The switchable switch is electrically connected to different third sub-matching circuits 121, so that the antenna 10 supports different target frequency bands. The third sub-matching circuit 121 will be described in detail later.

[0070] In another embodiment, the second matching circuit 120 further comprises an impedance matching circuit of the antenna 10. In other words, the feed source S electrically connects the second matching circuit 120 to the feed point P1. The impedance matching circuit in the second matching circuit 120 is used to match the output impedance of the feed source S and the input impedance of the radiator 100, so that the antenna 10 has better performance when supporting the target frequency band.

[0071] In the antenna 10 shown in Figure 3 , Figure 5 , the ground end 101 is located at the top of the drawing and the free end 102 is located at the bottom of the drawing. It should be understood that this is not a limitation of the embodiments of the present application. The relative positions of the ground end 101 and the free end 102 are not limited in the present application, and in other embodiments, the ground end 101 and the free end 102 can also be in other positions. Please refer to Figure 6 and Figure 7 , Figure 6 for the schematic diagram of the antenna provided by another embodiment of the present application; Figure 7 for the schematic diagram of the antenna provided by another embodiment of the present application. In the antenna 10 shown in Figure 6 , the ground end 101 is located at the left of the drawing and the free end 102 is located at the right of the drawing. In the antenna 10 shown in Figure 7 , the ground end 101 is located at the right of the drawing and the free end 102 is located at the left of the drawing.

[0072] Next, the resonant current corresponding to the first resonant mode and the second resonant mode supported by the antenna 10 provided by the embodiments of the present application is schematically shown and described. Please refer to Figure 3 , Figure 8 , Figure 9 , Figure 8 for the resonant current schematic diagram of the antenna provided by Figure 3 in the first resonant mode; Figure 9 for the resonant current schematic diagram of the antenna provided by Figure 3 in the second resonant mode. Please refer to Figure 6 , Figure 10 and Figure 11 , Figure 10 for the resonant current schematic diagram of the antenna provided by Figure 6A resonance current schematic diagram of the antenna in a first resonance mode; Figure 11 For Figure 6 A resonance current schematic diagram of the antenna in a second resonance mode. Please refer to Figure 8 Or Figure 10 The first resonance mode is a loop mode (also referred to as a Loop mode) of a part between the ground end 101 and the connection point P2 of the radiator 100. Please refer to Figure 9 Or Figure 11 The second resonance mode is a quarter wavelength mode of a monopole of a part between the feed point P1 and the free end 102 of the radiator 100.

[0073] For the convenience of description, the resonance current corresponding to the first resonance mode is named as a first resonance current I1, and the resonance current corresponding to the second resonance mode is named as a second resonance current I2.

[0074] The first resonance current I1 is distributed in the part between the ground end 101 and the connection point P2 of the radiator 100. The first resonance current I1 includes a first sub-resonance current I11 and a second sub-resonance current I12, wherein the flow directions of the first sub-resonance current I11 and the second sub-resonance current I12 are opposite. The second resonance current I2 is distributed in the part between the feed point P1 and the free end 102 of the radiator 100. In the embodiment, the first resonance current I1 and the second resonance current I2 are identified outside the radiator 100, and it can be understood that this is not a limitation on the embodiments of the present application.

[0075] Please refer to Figure 8 Or Figure 10 In the current half wavelength period shown in the schematic diagram, the flow direction of the first sub-resonance current I11 is from the ground end 101 to the connection point P2, and the flow direction of the second sub-resonance current I12 is from the connection point P2 to the ground end 101. Please refer to Figure 9 Or Figure 11 In the current half wavelength period shown in the schematic diagram, the flow direction of the second resonance current I2 is from the feed point P1 to the free end 102.

[0076] It can be understood that the first resonance current I1 is periodically changed. In Figure 8 Or Figure 10In the subsequent half-wavelength period: the first sub-resonant current I11 flows from the current zero point between the ground terminal 101 and the connection point P2 to the ground terminal 101; the second sub-resonant current I12 flows from the current zero point between the ground terminal 101 and the connection point P2 to the connection point P2. The second resonant current I2 also changes periodically. Figure 9 or Figure 11 Then, in the next half-wavelength period: the second resonant current I2 flows from the free end 102 to the feed point P1.

[0077] As can be seen from the distribution of the first resonant current I1 and the second resonant current I2, the first resonant mode is the loop mode (also known as the loop mode) of the part between the ground terminal 101 and the connection point P2 of the radiator 100; the second resonant mode is the quarter-wavelength monopole mode (also known as the quarter-wavelength monopole mode) of the part between the feed point P1 and the free end 102 of the radiator 100.

[0078] During simulation, the simulation is performed with the first matching circuit 110 in the first state (short circuit) as an example, and the second matching circuit 120 in the second state (open circuit) as an example. The first resonant mode is the loop mode between the ground terminal 101 of the radiator 100 and the connection point P2, which can also be called the loop mode between the ground terminal 101 and the first matching circuit 110 (also called loop mode).

[0079] The target frequency band that can be excited by the first resonant mode and the second resonant mode can be any frequency band. The specific frequency of the target frequency band depends on factors such as the environment in which the antenna 10 is located and the length of the antenna 10.

[0080] The S-parameters, system radiation efficiency, overall system efficiency, and radiation pattern of the target frequency band corresponding to the first resonant mode will be described later with reference to simulation diagrams. Similarly, the S-parameters, system radiation efficiency, overall system efficiency, and radiation pattern of the target frequency band corresponding to the second resonant mode will be described later with reference to simulation diagrams.

[0081] Please see Figure 12 , Figure 12 This is a schematic diagram of a first matching circuit for an antenna provided according to an embodiment of this application. Wherein, Figure 12 (a) in the diagram is a schematic diagram of the first matching circuit of the antenna provided in an embodiment of this application; Figure 12 (b) in the middle is Figure 12 The diagram shown in (a) illustrates the electrical connection of the switching switch to the first sub-matching circuit. Figure 12In (b) of the first matching circuit 110, the first sub-matching circuit 112 is directly connected, for example, the first sub-matching circuit 112 includes a zero-ohm or a conductive wire, etc. The first matching circuit 110 includes a switching switch 111, a first sub-matching circuit 112, and a second sub-matching circuit 113. The first sub-matching circuit 112 has a first impedance value. The second sub-matching circuit 113 has a second impedance value, which is greater than the first impedance value. If the first matching circuit 110 is in the first state: the switching switch 111 is turned on to the first sub-matching circuit 112, one end of the first sub-matching circuit 112 is electrically connected to the connection point P2, and the other end of the first sub-matching circuit 112 is grounded. If the first matching circuit 110 is in the second state: the switching switch 111 is turned on to the second sub-matching circuit 113, one end of the second sub-matching circuit 113 is electrically connected to the connection point P2, and the other end of the second sub-matching circuit 113 is grounded.

[0082] In an embodiment, the switching switch 111 can be, but is not limited to, a single-pole double-throw switch. In another embodiment, the switching switch 111 includes a sub-switch corresponding to the first sub-matching circuit 112, and another sub-switch corresponding to the second sub-matching circuit 113. The switching switch 111 will be described in detail later. The type of the switching switch 111 is not limited in the present application. In Figure 12 In the first matching circuit 110, a single-pole double-throw switch is taken as an example for illustration.

[0083] In the present embodiment, the first sub-matching circuit 112 is small impedance, and the second sub-matching circuit 113 is large impedance.

[0084] In an embodiment, if the first matching circuit 110 is in the first state, the switching switch 111 is turned on to the first sub-matching circuit 112, and the switching switch 111 is disconnected from the second sub-matching circuit 113. Since the first sub-matching circuit 112 is small impedance, when the first matching circuit 110 is in the first state, the first matching circuit 110 is small impedance (also referred to as low impedance). Accordingly, if the first matching circuit 110 is in the second state, the switching switch 111 is turned on to the second sub-matching circuit 113, and the switching switch 111 is disconnected from the first sub-matching circuit 112. Since the second sub-matching circuit 113 is large impedance, when the first matching circuit 110 is in the second state, the first matching circuit 110 is large impedance (also referred to as high impedance).

[0085] In an embodiment, the first sub-matching circuit 112 is a small impedance. The small impedance (also referred to as a low impedance) includes a small inductor, or a large capacitor, or a short. Thus, the first matching circuit 110 is in a first state, and the first matching circuit 110 includes a small inductor, or a large capacitor, or a direct connection (also referred to as a zero ohm). In an embodiment, the small inductor has an inductance value less than 5 nH. For example, the small inductor can have an inductance value of 1 nH, or 2 nH, or 3 nH, etc. In an embodiment, the large capacitor has a capacitance value greater than 2 pF. For example, the large capacitor can have a capacitance value of 5 pF, or 8 pF, or 10 pF, etc.

[0086] In an embodiment, the second sub-matching circuit 113 is a large impedance. The large impedance (also referred to as a high impedance) includes a large inductor, or a small capacitor, or a direct connection. Thus, the first matching circuit 110 is in a second state, and the first matching circuit 110 includes a large inductor, or a small capacitor, or an open circuit (i.e., the second sub-matching circuit 113 is a direct connection, and the switch 111 is disconnected from the second sub-matching circuit 113). In an embodiment, the large inductor has an inductance value greater than or equal to 5 nH. For example, the large inductor can have an inductance value of 8 nH, or 10 nH, or 20 nH, or 30 nH, etc. In an embodiment, the small capacitor has a capacitance value less than or equal to 2 pF. For example, the small capacitor can have a capacitance value of 2 pF, or 1 pF, or 0.5 pF, etc.

[0087] In this embodiment, the first matching circuit 110 includes a switching switch 111, a first sub-matching circuit 112 and a second sub-matching circuit 113. The first sub-matching circuit 112 has a first impedance value. The second sub-matching circuit 113 has a second impedance value, which is greater than the first impedance value. The switching switch 111 can be electrically connected to one of the first sub-matching circuit 112 and the second sub-matching circuit 113. If the switching switch 111 is electrically connected to the first sub-matching circuit 112, the first sub-matching circuit 112 is electrically connected to the connection point P2, the first matching circuit 110 is in the first state, the antenna 10 supports the target frequency band, and has a first directional pattern. If the switching circuit is electrically connected to the second sub-matching circuit 113, the second sub-matching circuit 113 is electrically connected to the connection point P2, the first matching circuit 110 is in the second state, the antenna 10 supports the target frequency band, and has a second directional pattern. Thus, the first matching circuit 110 provided by the embodiment of the application can realize the switching of the directional pattern when the antenna 10 supports the target frequency band. Therefore, the state of the first matching circuit 110 can be controlled, and thus the directional pattern when the antenna 10 supports the target frequency band can be controlled. Thus, the antenna 10 of the embodiment of the application can realize a relatively large range of coverage of the directional pattern of the target frequency band, and further enables the antenna 10 to have better performance when communicating using the target frequency band.

[0088] Please refer to Figure 12 The switching switch 111 has a common end 111a, a first end 111b and a second end 111c. The common end 111a is electrically connected to the connection point P2. The first end 111b is electrically connected to the first sub-matching circuit 112 to ground. The second end 111c is electrically connected to the second sub-matching circuit 113 to ground. If the first matching circuit 110 is in the first state: the common end 111a is electrically connected to the first end 111b and the common end 111a is disconnected from the second end 111c. If the first matching circuit 110 is in the second state: the common end 111a is electrically connected to the second end 111c and the common end 111a is disconnected from the first end 111b.

[0089] In the embodiment, the switch 111 comprises a single-pole double-throw switch, and the switch 111 can be electrically connected to one of the first sub-matching circuit 112 and the second sub-matching circuit 113, which is simple and easy to implement. Thus, the first matching circuit 110 provided by the embodiment can realize the switching of the directional diagram of the antenna 10 when the antenna 10 supports the target frequency band. Therefore, the state of the first matching circuit 110 can be controlled, and then the directional diagram of the antenna 10 when the antenna 10 supports the target frequency band can be controlled. Thus, the antenna 10 of the embodiment can realize a larger range of coverage of the directional diagram of the target frequency band, and further makes the antenna 10 have better performance when the antenna 10 communicates by using the target frequency band.

[0090] Please refer to Figure 13 , Figure 13 FIG. 2 is a schematic diagram of a first matching circuit of an antenna according to another embodiment of the application. In the embodiment, the switch 111 comprises a first sub-switch 1111 and a second sub-switch 1112. The first sub-switch 1111 has a first connection end 1111a and a second connection end 1111b, the first connection end 1111a is electrically connected to the connection point P2, and the second connection end 1111b is electrically connected to the first sub-matching circuit 112 to the ground. The second sub-switch 1112 has a third connection end 1112a and a fourth connection end 1112b, the third connection end 1112a is electrically connected to the connection point P2, and the fourth connection end 1112b is electrically connected to the second sub-matching circuit 113 to the ground. If the first matching circuit 110 is in the first state, the first connection end 1111a and the second connection end 1111b of the first sub-switch 1111 are turned on, and the third connection end 1112a and the fourth connection end 1112b of the second sub-switch 1112 are turned off. If the first matching circuit 110 is in the second state, the first connection end 1111a and the second connection end 1111b of the first sub-switch 1111 are turned off, and the third connection end 1112a and the fourth connection end 1112b of the second sub-switch 1112 are connected.

[0091] In the embodiment, the switch 111 includes a first sub-switch 1111 and a second sub-switch 1112. If the first matching circuit 110 is in the first state, the switch 111 is enabled to connect the first sub-matching circuit 112, one end of the first sub-matching circuit 112 is electrically connected to the connection point P2, and the other end of the first sub-matching circuit 112 is grounded. If the first matching circuit 110 is in the second state, the switch 111 is enabled to connect the second sub-matching circuit 113, one end of the second sub-matching circuit 113 is electrically connected to the connection point P2, and the other end of the second sub-matching circuit 113 is grounded. Thus, the first matching circuit 110 provided in the embodiment can enable the antenna 10 to switch the directional pattern when the antenna 10 supports the target frequency band. Therefore, the state of the first matching circuit 110 can be controlled to further control the directional pattern of the antenna 10 when the antenna 10 supports the target frequency band. Thus, the antenna 10 provided in the embodiment can enable the directional pattern of the target frequency band to cover a larger range, and further improve the performance of the antenna 10 when the antenna 10 communicates using the target frequency band.

[0092] Please refer to Figure 14 , Figure 14 FIG. 6 is a schematic diagram of a first matching circuit of an antenna according to another embodiment of the present application. In the embodiment, the first matching circuit 110 includes a switch 1113 and a sub-matching circuit 1114. The switch 1113 has a first end 1113a and a second end 1113b. The first end 1113a is electrically connected to the connection point P2. One end of the sub-matching circuit 1114 is electrically connected to the second end 1113b, and the other end of the sub-matching circuit 1114 is grounded. If the first matching circuit 110 is in the first state, the first end 1113a is electrically connected to the second end 1113b. If the first matching circuit 110 is in the second state, the first end 1113a is electrically disconnected from the second end 1113b.

[0093] In the embodiment, the sub-matching circuit 1114 is a small impedance (also referred to as a low impedance). The small impedance (also referred to as a low impedance) includes a small inductance, a large capacitance, or a short circuit. Thus, when the first matching circuit 110 is in the first state, the first matching circuit 110 includes a small inductance, a large capacitance, or a direct connection (i.e., a short circuit). In an embodiment, the inductance value of the small inductance is less than 5 nH. For example, the inductance value of the small inductance can be 1 nH, 2 nH, 3 nH, or the like. In an embodiment, the capacitance value of the large capacitance is greater than 2 pF. For example, the capacitance value of the large capacitance can be 5 pF, 8 pF, 10 pF, or the like.

[0094] If the first matching circuit 110 is in the first state, the first end 1113a is electrically connected with the second end 1113b, the sub-matching circuit 1114 is electrically connected to the connection point P2, the first matching circuit 110 is small impedance (also referred to as low impedance); the antenna 10 supports the target frequency band and has a first directional pattern.

[0095] If the first matching circuit 110 is in the second state, the first end 1113a is disconnected with the second end 1113b, thus the first matching circuit 110 is large impedance (also referred to as high impedance); the antenna 10 supports the target frequency band and has a second directional pattern.

[0096] Therefore, by controlling the state of the switch 1113, the impedance of the first matching circuit 110 can be changed, so as to control the directional pattern of the antenna 10 when supporting the target frequency band. It can be seen that the antenna 10 of the embodiment of the present application can realize a larger range of coverage of the directional pattern of the target frequency band, and further make the antenna 10 have better performance when communicating by using the target frequency band.

[0097] Please refer to Figures 15 to 24 , Figures 15 to 24 The third sub-matching circuit provided by each embodiment is shown in the schematic diagram of the second matching circuit. The third sub-matching circuit 121 comprises at least one of the circuits in Figures 15 to 22 The second matching circuit 120 comprises a third sub-matching circuit 121; and / or, the first matching circuit 110 comprises a third sub-matching circuit 121. The third sub-matching circuit 121 comprises at least one of the following circuits.

[0098] Please refer to Figure 15 The third sub-matching circuit 121 comprises a capacitor C0. The capacitor C0 can be, but is not limited to, a variable capacitor.

[0099] Please refer to Figure 16 The third sub-matching circuit 121 comprises an inductor L0. The inductor L0 can be, but is not limited to, a variable inductor.

[0100] Please refer to Figure 17 The third sub-matching circuit 121 comprises a series unit 1222 of the capacitor C0 and the inductor L0.

[0101] Please refer to Figure 18 The third sub-matching circuit 121 comprises a parallel unit 1221 of the capacitor C0 and the inductor L0.

[0102] Please refer to Figure 19The third sub-matching circuit 121 includes a first capacitor C1, an inductor L0 and a second capacitor C2, the first capacitor C1 and the inductor L0 are connected in parallel to form a parallel unit 1221, and the second capacitor C2 is connected in series with the parallel unit 1221.

[0103] Referring to Figure 20 The third sub-matching circuit 121 includes a capacitor C0, a first inductor L1 and a second inductor L2, the capacitor C0 and the first inductor L1 are connected in parallel to form a parallel unit 1221, and the second inductor L2 is connected in series with the parallel unit 1221.

[0104] Referring to Figure 21 The third sub-matching circuit 121 includes an inductor L0, a first capacitor C1 and a second capacitor C2, the inductor L0 and the first capacitor C1 are connected in series to form a series unit 1222, and the second capacitor C2 is connected in parallel with the series unit 1222.

[0105] Referring to Figure 22 The third sub-matching circuit 121 includes a capacitor C0, a first inductor L1 and a second inductor L2, the capacitor C0 and the first inductor L1 are connected in series to form a series unit 1222, and the second inductor L2 is connected in parallel with the series unit 1222.

[0106] Referring to Figure 23 The third sub-matching circuit 121 includes a first capacitor C1, a first inductor L1, a second capacitor C2 and a second inductor L2, the first capacitor C1 and the first inductor L1 are connected in parallel to form a first parallel unit 1221a, the second capacitor C2 and the second inductor L2 are connected in parallel to form a second parallel unit 1221b, and the first parallel unit 1221a and the second parallel unit 1221b are connected in series.

[0107] Referring to Figure 24 The third sub-matching circuit 121 includes a first capacitor C1, a first inductor L1, a second capacitor C2 and a second inductor L2, the first capacitor C1 and the first inductor L1 are connected in series to form a first series unit 1222a, the second capacitor C2 and the second inductor L2 are connected in series to form a second series unit 1222b, and the first series unit 1222a and the second series unit 1222b are connected in parallel.

[0108] The third sub-matching circuit 121 is used for adjusting the resonant frequency point of the target frequency band, so that according to the specific frequency band of the target frequency band, one of the plurality of third sub-matching circuits 121 is selected by using the switch which can be switched, so that the radiator 100 can work in the target frequency band required to be supported.

[0109] The second matching circuit 120M2 is used to adjust the resonant frequency of the target frequency band so that the radiator 100 supports the required target frequency band and the radiator 100 has better performance in the target frequency band.

[0110] Furthermore, the second matching circuit 120 includes a third sub-matching circuit 121, the third sub-matching circuit 121 including... Figures 15 to 22 At least one of the circuits in the circuit, therefore, the second matching circuit 120 is simple and easy to implement.

[0111] In one embodiment, the first matching circuit 110 also includes adjustable devices such as switchable switches and variable capacitors; correspondingly, the second matching circuit 120 also includes adjustable devices such as switchable switches and variable capacitors.

[0112] The performance of the antenna 10 provided in the embodiments of this application will be described by simulation.

[0113] Please see Figure 25 , Figure 25 This diagram illustrates the S-parameters and efficiency of an antenna provided in one embodiment of this application. In this simulation diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents dB. The simulation uses the N78 band as an example, where the center frequency of the N78 band is 3.5 GHz. It should be understood that this should not be construed as a limitation on the embodiments of this application. In this simulation diagram, curve ① is the S11 curve of the first resonant mode of the antenna 10 provided in an embodiment of this application, labeled as "S1,1_Mode 1" in the diagram; curve ② is the S11 curve of the second resonant mode of the antenna 10 provided in an embodiment of this application, labeled as "S1,1_Mode 2" in the diagram; curve ③ is the system radiation efficiency curve of the first resonant mode, labeled as "System Rad.Efficiency[SP1@AC1]" in the diagram; curve ④ is the system radiation efficiency curve of the second resonant mode, labeled as "System Rad.Efficiency[SP1@AC2]" in the diagram; curve ⑤ is the system total efficiency curve of the first resonant mode, labeled as "System Total.Efficiency[SP1@AC1]" in the diagram; and curve ⑥ is the system total efficiency curve of the second resonant mode, labeled as "System Total.Efficiency[SP1@AC2]" in the diagram. As can be seen from this simulation diagram, the system radiation efficiency corresponding to the first resonant mode is essentially the same as that corresponding to the second resonant mode; the system total efficiency corresponding to the first resonant mode is also essentially the same as that corresponding to the second resonant mode.

[0114] In an embodiment, the first resonant mode supports a resonant frequency point of the target frequency band as a first resonant frequency point. The second resonant mode supports a resonant frequency point of the target frequency band as a second resonant frequency point. An absolute value of a difference between the first resonant frequency point and the second resonant frequency point is Δf, and Δf satisfies: 0≤Δf≤50MHz.

[0115] Please refer to Figure 25 , Figure 25 In an embodiment, the first resonant mode supports a first resonant frequency point of the target frequency band as a lowest point of a notch in a curve ①; and the second resonant mode supports a second resonant frequency point of the target frequency band as a lowest point of a notch in a curve ②. The first resonant frequency point is the same as the second resonant frequency point. It can be understood that in other embodiments, the first resonant frequency point is different from the second resonant frequency point, as long as an absolute value of a difference between the first resonant frequency point and the second resonant frequency point is Δf, and Δf satisfies: 0≤Δf≤50MHz.

[0116] For example, the absolute value of the difference between the first resonant frequency point and the second resonant frequency point is Δf, and Δf can be, but is not limited to, 0, or 5MHz, or 10MHz, or 15MHz, or 20MHz, or 25MHz, or 30MHz, or 40MHz, or 45MHz, or 50MHz.

[0117] If the target frequency band is different, the absolute value of the difference between the first resonant frequency point and the second resonant frequency point can be the same or different. For example, if the target frequency band includes an N78 frequency band, the absolute value of the difference between the first resonant frequency point and the second resonant frequency point satisfies: 0≤Δf≤50MHz. If the target frequency band includes a low frequency band, the absolute value of the difference between the first resonant frequency point and the second resonant frequency point satisfies: 0≤Δf≤30MHz. It should be noted that 0≤Δf≤30MHz also belongs to Δf satisfying: 0≤Δf≤50MHz.

[0118] The absolute value of the difference between the first resonant frequency point and the second resonant frequency point is Δf, and Δf satisfies: 0≤Δf≤50MHz. Therefore, the resonant frequency of the target frequency band excited by the first resonant mode (i.e., the first resonant frequency point) is equal to or approximately equal to the resonant frequency of the target frequency band excited by the second resonant mode (i.e., the second resonant frequency point). Further, when the antenna 10 switches from the target frequency band supported by the first resonant mode to the target frequency band supported by the second resonant mode, the antenna 10 can still maintain a relatively stable frequency band. When the antenna 10 switches from the target frequency band supported by the second resonant mode to the target frequency band supported by the first resonant mode, the antenna 10 can still maintain a relatively stable frequency band and a relatively stable resonant frequency point. Further, the antenna 10 has better performance in the target frequency band.

[0119] Next, the first pattern and the second pattern of the antenna 10 provided by an embodiment of the present application are described in detail.

[0120] Please refer to Figure 26 , Figure 27 , Figure 28 , Figure 29 and Figure 30 , Figure 26 the first pattern of the antenna in the first resonant mode supporting the target frequency band when the electronic device to which the antenna is applied is in a portrait screen state; Figure 27 for Figure 26 the electronic device from another perspective; Figure 28 the second pattern of the antenna in the second resonant mode supporting the target frequency band when the electronic device to which the antenna is applied is in a portrait screen state; Figure 29 for Figure 28 the electronic device from another perspective; Figure 30 is a schematic diagram of the antenna applied to the electronic device in the first direction and the second direction to support the target frequency band. In Figure 26 , the first pattern of the antenna 10 in the first resonant mode supporting the target frequency band when the electronic device 1 is in a portrait screen state; in Figure 27 is a top view from the top of the electronic device 1 in Figure 26 . Among them, Figure 26 and Figure 27 the patterns are the first pattern of the antenna in the first resonant mode supporting the target frequency band. In Figure 28 , the second pattern of the antenna 10 in the second resonant mode supporting the target frequency band when the electronic device 1 is in a portrait screen state; in Figure 29 is a top view from the top of the electronic device 1 in Figure 28 . Among them, Figure 28 and Figure 29 the patterns are the second pattern of the antenna in the second resonant mode supporting the target frequency band. In Figure 30 , the remaining three directions with arrows respectively indicate the extension direction of the short side, the extension direction of the long side, and the thickness direction of the electronic device 1.

[0121] from Figures 26 to 30It can be seen that, since the first resonant mode and the second resonant mode are different current modes, the first directional diagram corresponding to the first resonant mode and the second directional diagram corresponding to the second resonant mode are obviously different. Specifically, the directions of the first directional diagram corresponding to the first resonant mode are concentrated in the upper right (indicated as D11 in the figure), and the directions of the second directional diagram corresponding to the second resonant mode are concentrated in the upper left (indicated as D12 in the figure), so the first directional diagram corresponding to the first resonant mode and the second directional diagram corresponding to the second resonant mode are obviously different and have good complementarity.

[0122] Please refer to the accompanying drawings Figure 31 and Figure 32 , Figure 31 is a directional diagram of the electronic device in a landscape state when the antenna is in the first resonant mode and the electronic device is held by two hands; Figure 32 is a directional diagram of the electronic device in a landscape state when the antenna is in the second resonant mode and the electronic device is held by two hands. In Figure 31 and Figure 32 , they are both schematic diagrams (i.e. top view) of the electronic device 1 in a landscape state from the top of the electronic device 1 in a landscape state. It can be seen that the first directional diagram corresponding to the first resonant mode is mainly directed to the back side (i.e. the side where the back cover 70 is located); and the second directional diagram corresponding to the second resonant mode is mainly directed to the front side (i.e. the side where the display screen 60 is located). Therefore, the first directional diagram and the second directional diagram have good complementarity.

[0123] Please refer to the accompanying drawings Figure 3 , Figure 4 and refer to Figure 33 and Figure 34 , Figure 33 is a schematic diagram of an electronic device provided by an embodiment of the present application; Figure 34 is Figure 33Fig. 1 is a schematic diagram of a part of structure of an electronic device. The electronic device 1 comprises an antenna 10. The antenna 10 can be the antenna 10 provided in any of the foregoing embodiments, and the form of the antenna 10 shown in the figure should not be understood as a limitation on the antenna 10 provided in the embodiments of the present application. The antenna 10 is specifically described above, and will not be described here again. The electronic device 1 can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an electronic reader, a handheld computer, an electronic display screen, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) \ virtual reality (VR) device, a media player, a smart wearable device, and the like, which has the antenna 10. In the embodiment, the electronic device 1 is taken as a mobile phone for illustration and description, and it can be understood that it should not be understood as a limitation on the embodiments of the present application.

[0124] In summary, the electronic device 1 provided by the embodiment of the present application comprises the antenna 10, the radiator 100 of the antenna 10 has the ground terminal 101, the feeding point P1, the connecting point P2 and the free terminal 102 arranged in sequence, by arranging the feeding point P1 and the connecting point P2, the boundary condition for exciting the first resonant mode and the second resonant mode can be constructed, and then the first state and the second state of the first matching circuit 110 are matched, so that the first matching circuit 110 supports different directional patterns of the target frequency band in the first state and in the second state. Specifically, if the first matching circuit 110 is in the first state, the feeding source S excites the part between the ground terminal 101 and the connecting point P2 of the radiator 100 to support the first resonant mode of the target frequency band, and the first resonant mode corresponds to the first directional pattern; if the first matching circuit 110 is in the second state, the feeding source S excites the part between the feeding point P1 and the free terminal 102 of the radiator 100 to support the second resonant mode of the target frequency band, and the second resonant mode corresponds to the second directional pattern; the first directional pattern is different from the second directional pattern. Therefore, the state of the first matching circuit 110 can be controlled, and then the directional pattern of the antenna 10 when supporting the target frequency band can be controlled. As can be seen, the antenna 10 of the embodiment of the present application can realize a relatively wide range of coverage of the directional pattern of the target frequency band, and further makes the antenna 10 have better performance when communicating by using the target frequency band. Further, the distance between the feeding point P1 and the free terminal 102 is less than the distance between the feeding point P1 and the ground terminal 101; so that the resonant frequency point of the target frequency band supported by the first resonant mode of the antenna 10 is the same or approximately the same as the resonant frequency point of the target frequency band supported by the second resonant mode, and then the antenna 10 can also maintain a relatively stable frequency band when switching from the target frequency band supported by the first resonant mode to the target frequency band supported by the second resonant mode; and the antenna 10 can also maintain a relatively stable frequency band when switching from the target frequency band supported by the second resonant mode to the target frequency band supported by the first resonant mode; and then the antenna 10 has better performance in the target frequency band. When the electronic device 1 communicates in the target frequency band by using the antenna 10, the electronic device 1 has better communication performance in the target frequency band.

[0125] In an embodiment, the electronic device 1 further comprises a middle frame 30, a display screen 60 and a back cover 70. The display screen 60 is arranged on one side of the middle frame 30. The display screen 60 is a component for realizing display function in the electronic device 1. The display screen 60 can be, but is not limited to, a screen with touch function or a screen without touch function, which is not limited in the present application. The back cover 70 is arranged on the other side of the middle frame 30. In other words, the back cover 70 and the display screen 60 are arranged on two opposite sides of the middle frame 30, respectively. When the electronic device 1 further comprises a battery, the back cover 70 is also referred to as a back cover 70. The material of the back cover 70 can be metal or non-metal, which is not limited in the present embodiment.

[0126] In the present embodiment, the middle frame 30 comprises a frame body 310 and a frame edge 320. The frame body 310 comprises metal or alloy. For example, the frame body 310 comprises aluminum-magnesium alloy. The frame body 310 is at least part of the ground electrode of the electronic device 1. The frame edge 320 is arranged around the periphery of the frame body 310. The radiator 100 is formed on the frame edge 320. In the present embodiment, part of the frame edge 320 of the middle frame 30 is reused as the radiator 100 of the antenna 10, which can make the electronic device 1 more compact.

[0127] It can be understood that, in the light of the description of the present embodiment, the electronic device 1 provided by the present embodiment is an introduction to an application environment of the antenna 10, which should not be understood as a limitation of the antenna 10 provided by the present embodiment.

[0128] Further, in an embodiment, the electronic device 1 has a first edge 1a and a second edge 1b connected by bending. The first edge 1a is the edge located at the top of the electronic device 1 when the electronic device 1 is in a vertical screen state. The length of the second edge 1b is greater than that of the first edge 1a. The radiator 100 is arranged corresponding to the second edge 1b, and the free end 102 is away from the first edge 1a compared with the ground end 101.

[0129] The first edge 1a is also referred to as the short edge of the electronic device 1, and the second edge 1b is also referred to as the long edge of the electronic device 1. In the present embodiment, the radiator 100 is arranged corresponding to the second edge 1b, so that the radiator 100 has a relatively large size.

[0130] In the embodiment, the free end 102 is away from the first side la compared with the ground end 101, so that the antenna 10 supports the target frequency band pattern (first and second direction patterns) towards the top of the electronic device 1 (including the top left, or the top right, etc.), so as not to be easily blocked by the user's hand holding the electronic device 1, and thus the electronic device 1 has better performance in the target frequency band.

[0131] Further, in an embodiment, the electronic device 1 further has a third side lc, which is connected to the second side lb by bending, and the third side lc is arranged opposite to the first side la. If the electronic device 1 is in a vertical screen state, the third side lc is the side of the electronic device 1 located at the bottom. The distance from the free end 102 to the first side la is less than the distance from the free end 102 to the third side lc.

[0132] In other embodiments, the electronic device 1 further has a fourth side ld. One end of the fourth side ld is connected to the first side la by bending, and the other end of the fourth side ld is connected to the third side lc by bending, and the fourth side ld is arranged opposite to the second side lb. In the embodiment, the first side la is the short side of the electronic device 1, the second side lb is the long side of the electronic device 1, the third side lc is the short side of the electronic device 1, and the fourth side ld is the long side of the electronic device 1. If the electronic device 1 is in a vertical screen state, the first side la is the side of the electronic device 1 located at the top, the third side lc is the side of the electronic device 1 located at the bottom, and the second side lb and the fourth side ld are the side edges of the electronic device 1 located at the two sides, respectively.

[0133] In the embodiment, if the electronic device 1 is in a vertical screen state, the distance from the free end 102 to the first side la is less than the distance from the free end 102 to the third side lc, so that the electronic device 1 is not easily blocked by the user's hand holding the electronic device 1 when in a vertical screen state, and further makes the electronic device 1 have better performance in the target frequency band.

[0134] In the embodiment, the frame part 320 has a first gap 310a between the frame part 320 and the frame body 310. The frame part 320 has an appearance surface 310b away from the frame body 310, and the frame part 320 further has a second gap 310c communicating the first gap 310a and the appearance surface 310b. The second gap 310c defines the free end 102 of the radiator 100.

[0135] In the embodiment, if the electronic device 1 is in the portrait state, the distance from the free end 102 to the first side la is less than the distance from the free end 102 to the third side lc; that is, the distance from the second gap to the first side la is less than the distance from the second gap to the third side lc. Thus, the electronic device 1 is not easily blocked by the user's hand when holding the electronic device 1, and the electronic device 1 has better performance in the target frequency band.

[0136] Referring to Figure 35 , Figure 35 The electronic device provided in the embodiment is shown in a circuit block diagram. The electronic device 1 includes an antenna 10, a detection module 20, and a control module 50. The detection module 20 is configured to detect the performance of the antenna 10 in the first state of the first matching circuit 110 when the electronic device 1 is in a current posture to obtain a first performance; and detect the performance of the antenna 10 in the second state of the first matching circuit 110 when the electronic device 1 is in the current posture to obtain a second performance. If the first performance is better than the second performance, the control module 50 controls the first matching circuit 110 to remain in the first state, or controls the first matching circuit 110 to switch from the second state to the first state; if the second performance is better than the first performance, the control module 50 controls the first matching circuit 110 to remain in the second state, or controls the first matching circuit 110 to switch from the first state to the second state.

[0137] The signal parameter of the performance of the antenna 10 can be, but is not limited to, a reference signal receiving power (RSRP) or a signal to interference plus noise ratio (SINR).

[0138] In a real environment, the incoming wave of the electromagnetic wave signal of the target frequency band has obvious directivity. As shown in Figure 30 If the electronic device 1 is in the portrait state, and the electromagnetic wave signal of the target frequency band mainly comes from above the electronic device 1, then the specific direction of the electromagnetic wave signal of the target frequency band has a great relationship with the coverage angle of the directional diagram. As shown in Figure 30 If the direction of the incoming wave of the electromagnetic wave signal of the target frequency band comes from the main lobe direction of the first directional diagram corresponding to the first resonant mode (labeled as mode 1 direction in the figure). Then, the control module 50 controls the first matching circuit 110 to be in the first state, so that the antenna 10 has better performance in the target frequency band.

[0139] Correspondingly, as shown in Figure 30As shown, if the electronic device 1 is in a portrait state, and the electromagnetic wave signal of the target frequency band mainly comes from above the electronic device 1, then the specific direction of the electromagnetic wave signal of the target frequency band has a great relationship with the coverage angle of the directional pattern. As shown, Figure 30 As shown, if the direction of the electromagnetic wave signal of the target frequency band comes from the main lobe direction of the second directional pattern corresponding to the second resonant mode (identified as mode 2 direction in the figure). Then, the control module 50 controls the first matching circuit 110 to be in the second state, so that the antenna 10 has better performance in the target frequency band.

[0140] In an embodiment, the first matching circuit 110 includes a switching switch 111, and the control module 50 is configured to control the switching switch 111. As shown, Figure 30 As shown, if the direction of the electromagnetic wave signal of the target frequency band mainly comes from the main lobe direction of the first directional pattern (identified as mode 1 direction in the figure), then the control module 50 controls the switching switch 111, so that the first matching circuit 110 is in the first state, so that the feed source S excites the first resonant mode to support the target frequency band. As shown, Figure 30 As shown, if the direction of the electromagnetic wave signal of the target frequency band mainly comes from the main lobe direction of the second directional pattern (identified as mode 2 direction in the figure), then the control module 50 controls the switching switch 111, so that the first matching circuit 110 is in the second state, so that the feed source S excites the second resonant mode to support the target frequency band.

[0141] Since the coverage areas of the first directional pattern and the second directional pattern are different, the signal parameters received by the directional patterns of different resonant modes (the first resonant mode and the second resonant mode) are different in different directions of arrival. The detection module 20 detects the performance of the antenna 10 when the first matching circuit 110 of the antenna 10 is in the first state to obtain a first performance, and detects the performance of the antenna 10 when the first matching circuit 110 of the antenna 10 is in the second state to obtain a second performance. For example, RSRP or SINR is detected. The control module 50 controls the state of the first matching circuit 110 according to the first performance and the second performance, so as to realize the adaptive adjustment of the antenna 10 in the target frequency band, and switch or keep the antenna 10 in the antenna 10 mode with higher signal strength, so as to realize a larger range of directional pattern coverage.

[0142] Further, in an embodiment, if the first performance is better than the second performance by a first preset threshold, the control module 50 controls the first matching circuit 110 to keep the first state, or controls the first matching circuit 110 to switch from the second state to the first state. If the second performance is better than the first performance by a second preset threshold, the control module 50 controls the first matching circuit 110 to keep the second state, or controls the first matching circuit 110 to switch from the first state to the second state.

[0143] In an embodiment, the first preset threshold can be, but is not limited to, 1 dB, or 2 dB, or 3 dB, which is not limited in the present application. In an embodiment, the second preset threshold can be, but is not limited to, 1 dB, or 2 dB, or 3 dB, which is not limited in the present application. The first preset threshold and the second preset threshold can be equal or not equal, which is not limited herein.

[0144] If the first performance is better than the second performance by a first preset threshold, the control module 50 controls the first matching circuit 110 to keep the first state, or controls the first matching circuit 110 to switch from the second state to the first state. If the second performance is better than the first performance by a second preset threshold, the control module 50 controls the first matching circuit 110 to keep the second state, or controls the first matching circuit 110 to switch from the first state to the second state. Thus, when the first performance and the second performance are not significantly different, and the relative size of the first performance and the second performance changes frequently, the performance caused by the state switching of the first matching circuit 110 is reduced or even avoided. Therefore, the antenna 10 provided by the embodiment of the present application has better performance in the target frequency band.

[0145] In summary, the antenna 10 provided by the embodiment of the present application excites the first resonant mode and the second resonant mode of the antenna 10, and forms two different coverage directional patterns, i.e., the first directional pattern and the second directional pattern. The first directional pattern and the second directional pattern have good complementarity.

[0146] In an embodiment, the first matching circuit 110 of the antenna 10 includes a switching switch 111. By controlling the switching switch 111, the first resonant mode and the second resonant mode of the antenna 10 are excited, and two different coverage directional patterns, i.e., the first directional pattern and the second directional pattern, are formed. The first directional pattern and the second directional pattern have good complementarity. For example, by controlling the switching switch 111, the 1 / 4 wavelength mode of a monopole and the loop mode of a loop antenna 10 can be realized.

[0147] The antenna 10 can switch the beam by detecting and controlling the switch 111, so as to improve the signal coverage and communication performance.

[0148] It can be understood that the antenna 10 provided by the embodiments of the present application is an antenna 10 form and implementation form, and the radiator 100 of the antenna 10 of the present application is not limited to a metal frame radiator 100, or an FPC process prepared radiator 100, or an LDS process prepared radiator 100, or a PDS process prepared radiator 100. In addition, the number and position of the antenna 10 in the electronic device 1 provided by the embodiments of the present application are not limited. A plurality of antennas 10 can be arranged in the whole machine of the electronic device 1 to realize intelligent switching between the plurality of antennas 10.

[0149] The electronic device 1 can include any number of antennas 10, and the antennas 10 can be located at any position of the electronic device 1. The target frequency band of the antenna 10 provided by the embodiments of the present application is not limited to the working frequency band mentioned in the present application.

[0150] In the present embodiment, the radiator 100 corresponds to the second side 1b of the electronic device 1. It can be understood that the radiator 100 can correspond to any position of the electronic device 1, and in other embodiments, the radiator 100 is arranged at the corner of the electronic device 1. For example, the radiator 100 can also correspond to the corner where the first side 1a and the second side 1b are connected; or the radiator 100 corresponds to the corner where the second side 1b and the third side 1c are connected, or other corners of the electronic device 1. In addition, the length of the radiator 100 can be adjusted according to the working frequency of the target frequency band and the medium environment where the radiator 100 is located.

[0151] The antenna 10 in other embodiments can be in the form of a mirror image of the antenna 10 in the drawings of the embodiments of the present application. For example, the antenna 10 shown in Figure 6 is a mirror image of the antenna 10 shown in Figure 7 . Specifically, in the antenna 10 shown in Figure 6 , the antenna 10 includes a radiator 100, a feed source S, and a first matching circuit 110. The radiator 100 has a ground end 101, a feed point P1, a connection point P2, and a free end 102 arranged in sequence. The ground end 101 is grounded, and the distance between the feed point P1 and the free end 102 is less than the distance between the feed point P1 and the ground end 101. The feed source S is electrically connected to the feed point P1. One end of the first matching circuit 110 is electrically connected to the connection point P2, and the other end is grounded. In the antenna 10 shown in Figure 6 , the ground end 101 is located on the left side of the drawing, and the free end 102 is located on the right side of the drawing.

[0152] In Figure 7 In the antenna 10 shown in FIG. 1, the antenna 10 comprises a radiator 100, a feed source S and a first matching circuit 110. The radiator 100 has a ground end 101, a feed point P1, a connection point P2 and a free end 102 arranged in sequence. The ground end 101 is grounded, and the distance between the feed point P1 and the free end 102 is less than the distance between the feed point P1 and the ground end 101. The feed source S is electrically connected to the feed point P1. One end of the first matching circuit 110 is electrically connected to the connection point P2, and the other end is grounded. In Figure 7 In the antenna 10 shown in FIG. 1, the ground end 101 is located on the right side of the drawing, and the free end 102 is located on the left side of the drawing.

[0153] It can be understood that Figure 6 The radiator 100 of the antenna 10 shown in FIG. 1 can be arranged corresponding to the first side la of the electronic device 1, and the radiator 100 of the antenna 10 can also be arranged corresponding to the third side lc of the electronic device 1. The position of the radiator 100 is not limited in the present application. Correspondingly, Figure 7 The radiator 100 of the antenna 10 shown in FIG. 1 can be arranged corresponding to the first side la of the electronic device 1, and the radiator 100 of the antenna 10 can also be arranged corresponding to the third side lc of the electronic device 1.

[0154] Correspondingly, in the embodiments of the present application Figure 5 The radiator 100 of the antenna 10 shown in FIG. 1 is taken as an example and is located on the left side of the ground pole 80 shown in the drawing. It can be understood that in other embodiments, the radiator 100 of the antenna 10 can also be located on the right side of the ground pole 80. In combination with the electronic device 1, Figure 5 The radiator 100 of the antenna 10 shown in FIG. 1 is arranged corresponding to the second side lb. In other embodiments, in combination with the electronic device 1, the radiator 100 of the antenna 10 can also be arranged corresponding to the fourth side ld of the electronic device 1, wherein the fourth side ld is arranged opposite to the second side lb.

[0155] In Figure 5 In the antenna 10 shown in FIG. 1, the ground end 101 of the radiator 100 is arranged adjacent to the first side la compared with the free end 102. It can be understood that in other embodiments, the ground end 101 of the radiator 100 is arranged away from the first side la compared with the free end 102.

[0156] In summary, in Figure 5In the shown antenna 10, the radiator 100 is arranged at the second side 1b on the left in the illustration, and the ground end 101 of the radiator 100 is arranged closer to the first side 1a than the free end 102. In a variant, the radiator 100 is arranged at the second side 1b on the left in the illustration, and the ground end 101 of the radiator 100 is arranged away from the first side 1a than the free end 102. In another variant, the radiator 100 is arranged at the fourth side 1d on the right in the illustration, i.e. the side opposite the second side 1b, and the ground end 101 of the radiator 100 is arranged closer to the first side 1a than the free end 102. In yet another variant, the radiator 100 is arranged at the fourth side 1d on the right in the illustration, i.e. the side opposite the second side 1b, and the ground end 101 of the radiator 100 is arranged away from the first side 1a than the free end 102.

[0157] The above is only some embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the scope of protection of the present application.

Claims

1. An antenna, characterized by The antenna comprises: a radiator having a ground end, a feed point, a connection point and a free end arranged in sequence, the ground end being grounded, a distance between the feed point and the free end being smaller than a distance between the feed point and the ground end; a feed source electrically connected to the feed point; and a first matching circuit having one end electrically connected to the connection point and the other end grounded, the first matching circuit having a first state and a second state, matching parameters of the first matching circuit in the first state and the second state being different; if the first matching circuit is in the first state, the feed source excites a part of the radiator between the ground end and the connection point to support a first resonant mode of a target frequency band, the first resonant mode corresponding to a first directional pattern; if the first matching circuit is in the second state, the feed source excites a part of the radiator between the feed point and the free end to support a second resonant mode of the target frequency band, the second resonant mode corresponding to a second directional pattern, wherein the first directional pattern is different from the second directional pattern.

2. The antenna of claim 1, wherein The first resonant mode is a ring mode of the part of the radiator between the ground end and the connection point; The second resonant mode is a quarter wavelength mode of a monopole of the part of the radiator between the feed point and the free end.

3. The antenna of claim 1, wherein The first matching circuit comprises: a switching switch; a first sub-matching circuit, the first sub-matching circuit having a first impedance value; and a second sub-matching circuit, the second sub-matching circuit having a second impedance value, the second impedance value being greater than the first impedance value; if the first matching circuit is in the first state: the switching switch turns on the first sub-matching circuit, one end of the first sub-matching circuit being electrically connected to the connection point, the other end of the first sub-matching circuit being grounded; if the first matching circuit is in the second state: the switching switch turns on the second sub-matching circuit, one end of the second sub-matching circuit being electrically connected to the connection point, the other end of the second sub-matching circuit being grounded.

4. The antenna of claim 3, wherein The switching switch has: a common end, the common end being electrically connected to the connection point; a first end, the first end being electrically connected to the first sub-matching circuit to ground; and a second end, the second end being electrically connected to the second sub-matching circuit to ground; if the first matching circuit is in the first state: the common end is electrically connected to the first end and the common end is disconnected from the second end; if the first matching circuit is in the second state: the common end is electrically connected to the second end and the common end is disconnected from the first end.

5. The antenna of claim 3, wherein, The switching switch comprises: a first sub-switch, the first sub-switch having a first connection end and a second connection end, the first connection end being electrically connected to the connection point, the second connection end being electrically connected to the first sub-matching circuit to ground; and a second sub-switch, the second sub-switch having a third connection end and a fourth connection end, the third connection end being electrically connected to the connection point, the fourth connection end being electrically connected to the second sub-matching circuit to ground; If the first matching circuit is in the first state: the first connection end and the second connection end of the first sub-switch are connected, and the third connection end and the fourth connection end of the second sub-switch are disconnected. If the first matching circuit is in the second state: the first connection end and the second connection end of the first sub-switch are disconnected, and the third connection end and the fourth connection end of the second sub-switch are connected.

6. The antenna according to claim 1, wherein The first matching circuit comprises: a switch, the switch having a first end and a second end, the first end being electrically connected to the connection point; and a sub-matching circuit, one end of the sub-matching circuit being electrically connected to the second end, the other end of the sub-matching circuit being grounded; If the first matching circuit is in the first state: the first end and the second end are electrically connected. If the first matching circuit is in the second state, the first end and the second end are disconnected.

7. The antenna according to claim 1, wherein The first resonance mode supports a resonance frequency point of the target frequency band as a first resonance frequency point, and the second resonance mode supports a resonance frequency point of the target frequency band as a second resonance frequency point, an absolute value Δf of a difference between the first resonance frequency point and the second resonance frequency point satisfying: 0≤Δf≤50MHz.

8. The antenna of any one of claims 1-7, wherein, The antenna further comprises: a second matching circuit, one end of the second matching circuit being electrically connected to the feed source, the other end of the second matching circuit being electrically connected to the feed point, the second matching circuit being used for adjusting a target frequency band supported by the antenna.

9. The antenna according to claim 8, wherein, The second matching circuit comprises a third sub-matching circuit, and / or the first matching circuit comprises a third sub-matching circuit; the third sub-matching circuit comprises at least one of the following circuits: a capacitor; an inductor; a series unit of a capacitor and an inductor; a parallel unit of a capacitor and an inductor; a first capacitor, an inductor and a second capacitor, the first capacitor and the inductor being connected in parallel to form a parallel unit, and the second capacitor being connected in series with the parallel unit; a capacitor, a first inductor and a second inductor, the capacitor and the first inductor being connected in parallel to form a parallel unit, and the second inductor being connected in series with the parallel unit; an inductor, a first capacitor and a second capacitor, the inductor and the first capacitor being connected in series to form a series unit, and the second capacitor being connected in parallel with the series unit; a capacitor, a first inductor and a second inductor, the capacitor and the first inductor being connected in series to form a series unit, and the second inductor being connected in parallel with the series unit; a first capacitor, a first inductor, a second capacitor and a second inductor, the first capacitor and the first inductor being connected in parallel to form a first parallel unit, the second capacitor and the second inductor being connected in parallel to form a second parallel unit, and the first parallel unit and the second parallel unit being connected in series; a first capacitor, a first inductor, a second capacitor and a second inductor, the first capacitor and the first inductor being connected in series to form a first series unit, the second capacitor and the second inductor being connected in series to form a second series unit, and the first series unit and the second series unit being connected in parallel.

10. The antenna according to claim 1, wherein, The target frequency band comprises an N78 frequency band, or an N79 frequency band, or a WiFi 5G frequency band.

11. An electronic device, comprising: The electronic device comprises the antenna as claimed in any one of claims 1-10.

12. The electronic device of claim 11, wherein, The electronic device comprises: a detecting module, configured to detect an antenna performance of a first matching circuit in a first state when the electronic device is in a current posture to obtain a first performance, and detect an antenna performance of the first matching circuit in a second state when the electronic device is in the current posture to obtain a second performance; and a control module, configured to control the first matching circuit to keep the first state or switch from the second state to the first state if the first performance is better than the second performance, or control the first matching circuit to keep the second state or switch from the first state to the second state if the second performance is better than the first performance.

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