Electronic device

Abstract

The invention provides an electronic device. The electronic equipment comprises an antenna assembly. The antenna assembly comprises a floor, a radiator, a feed source and a resonance path. The floor comprises a first edge and a second edge which are connected in a bent mode, and the length of the first edge is larger than that of the second edge. The radiator is provided with a feeding point, the radiator and the floor are arranged at an interval, and the orthographic projection of the feeding point on the floor is located in a current weakness area of characteristic mode current of the floor; the feed source is electrically connected to the feed point, and excites the floor through the radiator to generate the same excitation current along the extension direction of the first edge so as to support an electromagnetic wave signal of a first target frequency band; the feed source also excites the radiator to support an electromagnetic wave signal of a second target frequency band, and the frequency of the second target frequency band is greater than that of the first target frequency band; one end of the resonance path is electrically connected with the feed source, the other end is electrically connected to the feeding point, and the resonance path is a band-pass circuit of the second target frequency band. The communication performance of the antenna assembly in the electronic equipment provided by the embodiment of the invention is relatively good.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an electronic device. Background Art

[0002] With the development of technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and their functions are becoming more and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, the communication performance of antenna components in electronic devices in related technologies is not good enough and there is still room for improvement. Summary of the invention

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

[0004] A floor, the floor comprising a first side and a second side connected by a bend, wherein the length of the first side is greater than the length of the second side;

[0005] A radiator, wherein the radiator has a feeding point, the radiator is spaced apart from the floor, and an orthographic projection of the feeding point on the floor is located in a current weak point area of ​​a characteristic mode current of the floor;

[0006] A feed source, the feed source being electrically connected to the feed point, and exciting the floor through the radiator to generate an excitation current in the same extension direction along the first side to support an electromagnetic wave signal of a first target frequency band; and the feed source further excites the radiator to support an electromagnetic wave signal of a second target frequency band, wherein the frequency of the second target frequency band is greater than the frequency of the first target frequency band; and

[0007] A resonant path, one end of which is electrically connected to the feed source, and the other end of which is electrically connected to the feed point, and the resonant path is a bandpass circuit of the second target frequency band.

[0008] In summary, the electronic device provided in the embodiment of the present application, the antenna assembly in the electronic device, the radiator is spaced apart from the floor, the feed source is arranged on the circuit board and the feeding point is located in the current weak point area of ​​the characteristic mode current of the floor, which can better excite the excitation current in the same extension direction along the first side, so that the antenna assembly has a higher radiation efficiency in the first target frequency band, and therefore, the electronic device has better communication performance. Furthermore, the antenna assembly provided in the embodiment of the present application can also support a second target frequency band, and the resonant path is a bandpass circuit of the second target frequency band, so that when the antenna assembly supports the second target frequency band, it can reduce or even avoid the interference of signals in other frequency bands outside the second target frequency band to the second target frequency band, so that the antenna assembly has a better communication effect when supporting the second target frequency band. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0011] Figure 2 for Figure 1 A schematic diagram of a portion of the structure of an antenna assembly;

[0012] Figure 3 for Figure 2 A side view of a portion of the structure of an antenna assembly provided in;

[0013] Figure 4 for Figure 2 A schematic diagram of an equivalent circuit structure of a partial structure of an antenna assembly shown;

[0014] Figure 5 A schematic diagram of current distribution of a dipole antenna and an antenna assembly provided in an embodiment of the present application;

[0015] Figure 6 A schematic diagram of the distribution of the characteristic current with the largest proportion of longitudinal current corresponding to the characteristic mode of the circuit board;

[0016] Figure 7 for Figure 6 A schematic diagram of a current weak point area and a current strong point area in a floor of a circuit board shown;

[0017] Figure 8 for Figure 1 The S-parameter diagram of the antenna assembly provided;

[0018] Fig. 9 for Figure 1 A schematic diagram of current distribution when a radiator in an antenna assembly supports a first target frequency band and a second target frequency band;

[0019] Fig.10 for Figure 1 A schematic diagram of the current weak point area in the antenna assembly provided in;

[0020] Fig.11 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0021] Fig.12 Schematic diagram of an antenna assembly for setting an inductive device to reduce the size of the radiator;

[0022] Fig.13 A partial structural schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0023] Fig.14 A partial structural schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0024] Fig.15 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0025] Fig.16 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0026] Fig.17 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0027] Fig.18 for Fig.17 A schematic diagram of S parameter curves of various frequency bands of the first target frequency band in the antenna assembly shown;

[0028] Fig.19 Schematic diagram of an antenna assembly that does not adopt the embodiment of the present application and an antenna assembly provided by the embodiment of the present application;

[0029] Fig. 20 It is a schematic diagram comparing the system efficiency of each frequency band of the first target frequency band supported by an antenna assembly that does not adopt the implementation scheme of the present application and the antenna assembly of the present application in free space;

[0030] Fig.21 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0031] Fig. 22 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0032] Fig.23 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0033] Fig.24 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0034] Fig.25 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0035] Fig.26 A schematic diagram of S parameters of an antenna assembly in an electronic device provided in one embodiment of the present application;

[0036] Fig. 27A three-dimensional schematic diagram of an electronic device provided in one embodiment.

[0037] Description of main component numbers:

[0038] Electronic device 1, antenna assembly 10, circuit board 110, current weak point area 110a, current strong point area 110b, floor 111, first side 1111, second side 1112;

[0039] Radiator 120, first open end 121, second open end 122, feeding point P, feeding source S;

[0040] Inductive device 130, inductor 130a, first inductor L1, second inductor L2, third inductor L3, fourth inductor L4, fifth inductor L5, sixth inductor L6;

[0041] Switch unit 150, common terminal 151, port 152, first terminal 1521, second terminal 1522, third terminal 1523, fourth terminal 1524;

[0042] Electrical connection 160; resonance path 170, resonance inductor L0, resonance capacitor C0;

[0043] Device body 30 , display screen 310 , casing 330 . DETAILED DESCRIPTION

[0044] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in the present application are only a part of the embodiments, not all of the embodiments. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present application.

[0045] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0046] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example: a component or device including one or more parts is not limited to the one or more parts listed, but optionally includes one or more parts that are not listed but inherent to the exemplified product, or one or more parts that it should have based on the described function.

[0047] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Fig. 27 , Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of a portion of the structure of an antenna assembly; Figure 3 for Figure 2 A side view of a portion of the structure of an antenna assembly provided in; Figure 4 for Figure 2 A schematic diagram of an equivalent circuit structure of a partial structure of an antenna assembly shown; Fig. 27 1 is a three-dimensional schematic diagram of an electronic device provided in an embodiment. The present application embodiment provides an electronic device 1, wherein the electronic device 1 includes an antenna assembly 10. For convenience, a floor 111 is shown. Figure 2 Omitted Figure 1 The other layer structures of the circuit board 110, Figure 3 for Figure 21 is a schematic diagram of a side view from the top downward. The electronic device 1 includes an antenna assembly 10, and the antenna assembly 10 includes a floor 111, a radiator 120, a feed source S, and a resonant path 170. The floor 111 includes a first side 1111 and a second side 1112 connected by a bend, wherein the length of the first side 1111 is greater than the length of the second side 1112. The radiator 120 has a feeding point P, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111. The feed source S is electrically connected to the feeding point P, and the radiator 120 excites the floor 111 to generate an excitation current in the same extension direction of the first side 1111 to support an electromagnetic wave signal of a first target frequency band. And the feed source S also excites the radiator 120 to support an electromagnetic wave signal of a second target frequency band, wherein the frequency of the second target frequency band is greater than the frequency of the first target frequency band. One end of the resonant path 170 is electrically connected to the feed source S, and the other end is electrically connected to the feeding point P. The resonant path 170 is a bandpass circuit of the second target frequency band.

[0048] The floor 111 in the circuit board 110 may be, but is not limited to, a metal layer (e.g., a copper layer). A large piece of metal layer in the circuit board 110 usually constitutes the floor 111, also referred to as a ground electrode. It is understandable that the circuit board 110 also includes multiple insulating layers and multiple wiring layers. The floor 111 is usually sandwiched between two adjacent insulating layers. The wiring layer is also arranged between adjacent insulating layers, and the wiring layer and the floor 111 are arranged with an insulating layer between them. Different wiring layers may be electrically connected through wires or metal through holes. It is understandable that the introduction of the floor 111 here is only one case of the circuit board 110, and should not be understood as a limitation on the floor 111 provided in the embodiment of the present application.

[0049] The first side 1111 is connected to the second side 1112 by bending, and the connection between the first side 1111 and the second side 1112 can be an arc shape or a right angle. The present application does not limit the shape of the connection between the first side 1111 and the second side 1112.

[0050] In this embodiment, the length of the first side 1111 is greater than the length of the second side 1112 , and therefore, the first side 1111 is also referred to as a long side, and the second side 1112 is also referred to as a short side.

[0051] In one embodiment, the floor 111 and the radiator 120 together form a dipole antenna, the floor 111 is a radiating arm of the dipole antenna, named as a first radiating arm, and the radiator 120 is another radiating arm of the dipole antenna, named as a second radiating arm. When the antenna assembly 10 is working, the floor 111 and the radiator 120 both participate in the work.

[0052] The radiator 120 may be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the radiator 120 may be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the radiator 120 may be an antenna radiator designed using the middle frame formed of plastic and metal of the electronic device 1. In addition, the radiator 120 may also be a metal frame antenna radiator designed using a metal middle frame.

[0053] It is understandable that the present application does not specifically limit the shape, structure and material of the radiator 120. The shapes of the radiator 120 include but are not limited to bent, straight, L-shaped, arc-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the radiator 120 is in a strip shape, the present application does not limit the extension trajectory of the radiator 120, so the radiator 120 can extend in a straight line, a curve, a multi-section bend, etc. The above-mentioned radiator 120 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0054] The radiator 120 has two ends, both of which are not grounded. In other words, the radiator 120 is open-circuited at both ends, and therefore, the two ends are named as the first open-circuit end 121 and the second open-circuit end 122, respectively. The feeding point P is located at the first open-circuit end 121, or at the second open-circuit end 122, or between the first open-circuit end 121 and the second open-circuit end 122. When the feeding point P is located between the first open-circuit end 121 and the second open-circuit end 122, the feeding point P can be located at any position between the first open-circuit end 121 and the second open-circuit end 122. The antenna assembly 10 also includes an electrical connector 160 (see Figure 1), the feed source S is electrically connected to the feed point P through the electrical connector 160. The electrical connector 160 may be, but is not limited to, an elastic conductive sheet, or a conductive screw, etc.

[0055] The feed source S is electrically connected to the feed point P through the electrical connector 160, so that the electrical connection between the feed source S and the feed point P can be realized, which is simple and easy. Figure 3 In the embodiment, the feeding point P is located on the surface (upper surface) of the radiator 120 away from the floor 111 and protrudes from the upper surface of the radiator 120. It can be understood that in other embodiments, the feeding point P can also be located on the upper surface of the radiator 120, but flush with the upper surface of the radiator 120; or, in other embodiments, the feeding point P can also be located on the side of the radiator 120; or, in other embodiments, the feeding point P is located on the surface (lower surface) of the radiator 120 facing the floor 111. Schematic diagram of this embodiment Figure 3 The position of the feeding point P shown in FIG. 1 should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application.

[0056] Please also read Figure 5 , Figure 5 A schematic diagram of current distribution of a dipole antenna and an antenna assembly provided in an embodiment of the present application. Figure 5 (a) is a schematic diagram of current distribution of a dipole antenna; Figure 5 (b) is a schematic diagram of current distribution after one of the radiating arms in the dipole antenna is widened; Figure 5 (c) is a schematic diagram of current distribution after a radiating arm in a dipole antenna is widened; Figure 5 (d) is a schematic diagram of the current distribution of the antenna assembly 10 provided in the embodiment of the present application. Figure 5 It can be seen that from (a) to (d), one radiating arm of the dipole antenna gradually widens. It can be seen that the floor 111 in the antenna assembly 10 of the present application can be equivalent to one radiating arm of the dipole antenna. Specifically, the floor 111 in the antenna assembly 10 can be regarded as an antenna vibrator with a certain width in the dipole antenna. In this way, the floor 111 of the circuit board 110 and the radiator 120 are like a dipole antenna with a biased feeding point P.

[0057] When the antenna assembly 10 is applied to an electronic device 1 such as a mobile phone, the longitudinal dimension (length) and the transverse dimension (width) of the electronic device 1 are about 155mm×75mm. For the low-frequency band, the longitudinal dimension of the electronic device 1 is equivalent to 1 / 4 of the wavelength of the low-frequency band. According to the basic principle of the dipole antenna, that is, the longitudinal current of the floor 111 is fully stimulated, the equivalent aperture of the dipole antenna can be increased and the efficiency can be improved. At the same time, the floor 111 in the antenna assembly 10 provided in the embodiment of the present application is an effective radiator (i.e., the first radiation arm). The lower the frequency of the first target frequency band supported by the antenna assembly 10, the more significant the current effect of the floor 111, that is, for the antenna assembly 10 whose first target frequency band is a low-frequency band, the longitudinal current of the floor 111 can be fully stimulated, which can effectively improve the radiation efficiency of the antenna assembly 10.

[0058] In summary, in the implementation manner of the present application, the floor 111 can be regarded as a radiating arm (antenna vibrator) with a certain width, so that the floor 111 and the radiator 120 are a dipole antenna biased at the same feeding point P. The lower the first target frequency band supported by the dipole antenna, the more significant the current limiting effect of the floor 111, that is, for the antenna assembly 10 whose first target frequency band is a low-frequency band, the excitation current (also called longitudinal current) in the same extension direction of the floor 111 along the first side 1111 can be fully stimulated, which can effectively improve the radiation efficiency of the antenna assembly 10. It can be understood that although the first target frequency band is a low-frequency band as an example for explanation here, in other implementation manners, the first target frequency band can also be an intermediate frequency, or a high frequency, or a wireless fidelity (WiFi) frequency band, or a global positioning system (GPS) frequency band, etc. The implementation manner of the present application does not limit the first target frequency band.

[0059] The working principle of the antenna assembly 10 provided in the embodiment of the present application is described and explained below.

[0060] In this embodiment, the floor 111 can be the ground in the circuit board 110. For example, the circuit board 110 is a main board. The characteristic mode is an inherent mode that characterizes the floor 111. By analyzing the characteristic mode (also called characteristic mode) of the circuit board 110, the most suitable feeding position can be found according to the boundary conditions. The following is an example of the first target frequency band supported by the antenna assembly 10 being a low-frequency band. The characteristic current with the largest proportion of the longitudinal current mode can be obtained through simulation. Please refer to Figure 6 and Figure 7 , Figure 6 The schematic diagram of the distribution of the characteristic current with the largest proportion of longitudinal current corresponding to the characteristic mode of the floor; Figure 7 for Figure 6 The current distribution of the characteristic mode is mainly characterized by the sinusoidal behavior of the edge of the floor 111, which is represented by Figure 6 It can be seen that the characteristic mode has a maximum and a minimum current distribution at a specific position. In addition to the current distribution, the voltage distribution, that is, the electric field distribution on the floor 111, can also be considered. The difference between the phase of the electric field distribution in the floor 111 and the phase of the current distribution is 90°. That is, the minimum value of the electric field distribution in the floor 111 is the same as the maximum value of the current distribution in the floor 111; conversely, the maximum value of the electric field distribution in the floor 111 is the same as the minimum value of the current distribution in the floor 111. Figure 6 In the figure, the curve J next to the floor 111 is used to represent the current distribution of the floor 111, and the curve V is used to represent the voltage distribution of the floor 111. Curve J indicates that the current distribution of the floor 111 is a sine distribution. It can be seen from curve J that the two ends of the floor 111 are where the current is the smallest, and the middle position of the floor 111 is where the current is the strongest. Curve V indicates that the electric field distribution of the floor 111 is a cosine distribution. Therefore, an inductive coupling element (ICE) can be placed at the maximum position of the characteristic mode current distribution of the floor 111 (that is, the minimum electric field distribution of the floor 111) to excite the characteristic mode; or, a capacitive coupling element (CCE) can be placed at the minimum position of the characteristic mode current distribution of the circuit board 110 (that is, the maximum electric field distribution of the circuit board 110) to excite the characteristic mode. Please refer to Figure 7 ,exist Figure 7In the figure, there is a current weak point area 110a of the characteristic mode current distribution of the floor 111, and a current strong point area 110b of the characteristic mode current distribution of the floor 111. However, the size of ICE is usually large and not easy to implement; the size of CCE is relatively small and easy to implement, so CCE feeding is used in this case. In addition, if the antenna assembly 10 is to obtain a higher radiation efficiency, it is necessary to better excite the longitudinal current distribution of the floor 111. It should be noted that, when using CCE feeding, in addition to setting the feeding point P at the minimum point of the characteristic mode current of the floor 111, other positions other than the minimum point of the characteristic mode current in the current weak point area 110a of the characteristic mode of the floor 111 can also be used. The so-called current weak point area 110a of the characteristic mode current of the floor 111 refers to the area including the minimum value of the characteristic mode current of the floor 111, and the current weak point area 110a provided in the embodiment of the present application will be quantified later. The so-called current strong point area 110b of the characteristic mode current of the floor 111 refers to the area including the maximum value of the characteristic mode of the floor 111.

[0061] In this embodiment, the radiator 120 is spaced apart from the floor 111 (see Figure 3 ), therefore, the radiator 120 excited by the feed source S acts as a radiation driving device to constitute a CCE.

[0062] In the embodiment of the present application, the number of the current weak point areas 110a of the circuit board 110 is four. The orthographic projection of the feeding point P on the floor 111 can be located in any one of the four current weak point areas 110a of the characteristic mode current of the floor 111. Accordingly, the radiator 120 is disposed adjacent to the current weak point area 110a where the orthographic projection of the feeding point P on the floor 111 is located.

[0063] In the antenna assembly 10 provided in the embodiment of the present application, the floor 111 constitutes the main radiation branch of the first target frequency band, contributing most of the radiation of the antenna assembly 10, and the radiator 120 is equivalent to acting as a radiation driving device for the entire antenna assembly 10, becoming the excitation condition for the floor 111 to work in the first target frequency band, and the energy of the radiator 120 accounts for a very small proportion. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10.

[0064] In this embodiment, the feed source S also excites the radiator 120 to support the electromagnetic wave signal of the second target frequency band. Therefore, the antenna assembly 10 can work in both the first target frequency band and the second target frequency band, so that the antenna assembly 10 has better communication performance. The second target frequency band can be, but is not limited to, a medium frequency band, a high frequency band, a medium-high frequency band, an ultra-high frequency band, etc. As long as the frequency of the second target frequency band is greater than the frequency of the first target frequency band. For example, the first target frequency band can be a low frequency band, and the second target frequency band can be a medium frequency band; or, the first target frequency band can be a low frequency band, and the second target frequency band can be a high frequency band.

[0065] In this embodiment, one end of the resonant path 170 is electrically connected to the feed source S, and the other end is electrically connected to the feed point P. The resonant path 170 is a bandpass circuit of the second target frequency band. Therefore, the current in the feed source S that excites the radiator 120 to generate the second target frequency band can be loaded onto the radiator 120 through the resonant path 170 to excite the radiator 120 to support the second target frequency band. The resonant path 170 is a bandpass circuit of the second target frequency band. Therefore, the resonant path 170 blocks signals of other frequency bands outside the second target frequency band to reduce or even avoid interference of signals of other frequency bands outside the second target frequency band to the second target frequency band. For example, the resonant path 170 can block signals of other frequency bands (such as the first target frequency band) with frequencies lower than the second target frequency band, so as to reduce or even avoid interference of signals of other frequency bands (such as the first target frequency band) with frequencies lower than the second target frequency band to the second target frequency band; in addition, the resonant path 170 can also block signals of other frequency bands with frequencies higher than the second target frequency band, so as to reduce or even avoid interference of signals of other frequency bands with frequencies higher than the second target frequency band to the second target frequency band. Therefore, the existence of the resonant path 170 can enable the antenna assembly 10 to have a better communication effect when supporting the second target frequency band.

[0066] In summary, in the antenna assembly 10 provided in the embodiment of the present application, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111, which can well excite the excitation current in the same extension direction along the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the first target frequency band. It can be seen that the communication performance of the antenna assembly 10 provided in the embodiment of the present application is good. In addition, in the antenna assembly 10 provided in the embodiment of the present application, the floor 111 constitutes the main radiation branch of the first target frequency band, contributing most of the radiation of the antenna assembly 10, and the radiator 120 is equivalent to acting as the radiation driving device of the entire antenna assembly 10, which becomes the excitation condition for the floor 111 to work in the first target frequency band, and the energy of the radiator 120 accounts for a very small proportion. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10. Furthermore, the antenna assembly 10 provided in the embodiment of the present application can also support a second target frequency band, and the resonant path 170 is a bandpass circuit of the second target frequency band, so that when the antenna assembly 10 supports the second target frequency band, it can reduce or even avoid the interference of signals of other frequency bands outside the second target frequency band to the second target frequency band, so that the antenna assembly 10 has a better communication effect when supporting the second target frequency band.

[0067] Please continue reading Figure 4 The resonant path 170 includes a resonant inductor L0 and a resonant capacitor C0 connected in series.

[0068] Since the resonant path 170 includes a resonant inductor L0 and a resonant capacitor C0 connected in series, the resonant path 170 is also referred to as an LC series resonant path 170. In the present embodiment, one end of the resonant capacitor C0 is electrically connected to the feed source S, the other end of the resonant capacitor C0 is electrically connected to one end of the resonant inductor L0, and the other end of the resonant inductor L0 is electrically connected to the feed point P. This is not to be construed as a limitation on the resonant path 170 provided in the embodiment of the present application. It can be understood that in other embodiments, one end of the resonant inductor L0 is electrically connected to the feed source S, the other end of the resonant inductor L0 is electrically connected to one end of the resonant capacitor C0, and the other end of the resonant capacitor C0 is electrically connected to the feed point P.

[0069] Furthermore, the resonant path 170 satisfies:

[0070]

[0071] Wherein, L0 is the inductance value of the resonant inductor L0 in the resonant path 170, C0 is the capacitance value of the resonant capacitor C0 in the resonant path 170, and f 21 is the upper sideband frequency in the second target frequency band, f 22 is the lower sideband frequency in the second target frequency band.

[0072] f 21 is the upper sideband frequency in the second target frequency band, that is, the minimum value in the second target frequency band; f 22 is the lower sideband frequency in the second target frequency band, that is, the maximum value in the second target frequency band.

[0073] The resonant path 170 satisfies Therefore, the resonant path 170 can be connected to the resonant path 170 by a frequency greater than or equal to f 22 and can be achieved with a frequency less than or equal to f 21 In addition, the resonant inductor L0 and the resonant capacitor C0 with appropriate parameters can be selected according to the minimum value and the maximum value in the second target frequency band. In one embodiment, the capacitance value of the resonant capacitor C0 is 0.5 pF, and the inductance value of the resonant inductor L0 is 3.9 nH.

[0074] Please also read Figure 8 and Fig. 9 , Figure 8 for Figure 1 The S-parameter diagram of the antenna assembly provided; Fig. 9 for Figure 1 Schematic diagram of current distribution when the radiator in the antenna assembly supports the first target frequency band and the second target frequency band. Fig. 9 (a) in Figure 1 A schematic diagram of current distribution when the radiator 120 supports the first target frequency band; Fig. 9 (b) in Figure 1 Schematic diagram of current distribution when the radiator 120 supports the second target frequency band. Figure 8 In the figure, the horizontal axis is the frequency in GHz, and the vertical axis is the S-Parameters in dB. Figure 8It can be seen that the radiator 120 supports the first target frequency band (the frequency band where the resonance point is 1 in the figure) and the second target frequency band (the frequency band where the resonance point is 2 in the figure). It can be understood that the first target frequency band and the second target frequency band given in the simulation diagram of this embodiment are only simulation diagrams of one embodiment, and should not be understood as limitations on the specific frequency bands of the first target frequency band and the second target frequency band supported by the radiator 120 provided in the embodiment of the present application. In this embodiment, the first target frequency band is slightly higher than 1 GHz (that is, slightly higher than the low-frequency band) for illustration. It can be understood that in other embodiments, the first target frequency band is a low-frequency band (please refer to Fig.26 (Fig. 2).

[0075] Further, the radiator 120 has a first resonance mode and a second resonance mode. The first resonance mode supports the first target frequency band, and the first resonance mode is a quarter wavelength mode of the radiator 120. The second resonance mode supports the second target frequency band, and the second resonance mode is a half wavelength mode of the radiator 120.

[0076] It should be noted that the "wavelength" of the "quarter wavelength mode" in "the first resonant mode is the quarter wavelength mode of the radiator 120" refers to the wavelength corresponding to the center frequency of the first target frequency band. Fig. 9 In comparison with Figure 4 The resonance path 170 is omitted. Fig. 9 As can be seen from (a) in FIG. 1 , the current of the portion of the radiator 120 adjacent to the feeding point P is relatively large, while the current of the portion of the radiator 120 away from the feeding point P is relatively small, which is a typical current distribution of a quarter-wavelength mode. The quarter-wavelength mode is also called the fundamental mode, and the first resonant mode is the quarter-wavelength mode of the radiator 120. When the antenna assembly 10 supports the first target frequency band, it works in the fundamental mode and has a higher radiation efficiency.

[0077] It should be noted that the "wavelength" of the "half-wavelength mode" in "the second resonant mode is the half-wavelength mode of the radiator 120" refers to the wavelength corresponding to the center frequency of the second target frequency band. Fig. 9 In (a) and (b), the darker the current color, the greater the current intensity; the lighter the current color, the smaller the current intensity. Fig. 9As can be seen from (b), the current in the middle of the radiator 120 is the strongest, and the current at both ends is the weakest, which is a typical current distribution of a half-wavelength mode. In the implementation of the present application, the half-wavelength mode of the radiator 120 can also be used to support the second target frequency band. In other words, the radiator 120 can support both the first target frequency band and the second target frequency band. Therefore, compared with using one radiator 120 to support one target frequency band, the antenna assembly 10 provided in the implementation of the present application can support other wavelength modes besides the fundamental mode to support the second frequency band, so that the antenna assembly 10 has a better communication effect.

[0078] In one embodiment, the antenna assembly 10 operates in the first target frequency band of the fourth generation mobile communication system (4th Generation Mobile Communication Technology) and the second target frequency band of 4G to support carrier aggregation (CA). Or the antenna assembly 10 operates in the first target frequency band of 4G and the second target frequency band of the fifth generation mobile communication system (5th Generation Mobile Communication Technology) to support 4G-5G dual connectivity (E-UTRA-NR Dual Connectivity, ENDC). Or the electronic device 1 includes dual cards, one of the dual cards operates in the first target frequency band, and the other of the dual cards operates in the second target frequency band.

[0079] Since the antenna assembly 10 supports the first target frequency band and can support the second target frequency band, the antenna assembly 10 can work in CA, ENDC or dual-card requirements, so that the antenna assembly 10 can be applicable to a wider range of usage scenarios.

[0080] The current weak point area 110 a is located in an area with an intersection of an extension line of the first side 1111 and an extension line of the second side 1112 as the center and a radius of 1 / 16 of the wavelength of the first target frequency band.

[0081] The floor 111 includes two first sides 1111 disposed opposite to each other, and two second sides 1112 disposed opposite to each other. The number of the current weak point areas 110a is four. The positive projection of the feeding point P on the floor 111 is located in any one of the four current weak point areas 110a, and the radiator 120 is located in the current weak point area 110a adjacent to the feeding point P.

[0082] See also Fig.10 , Fig.10 for Figure 1The schematic diagram of the current weak point area in the antenna assembly provided in. The current weak point area 110a is located in an area with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center O and 1 / 16 of the wavelength of the first target frequency band as the radius R.

[0083] In the schematic diagram of this embodiment, the connection between the first side 1111 and the second side 1112 is an arc shape. The center of the circle is the intersection of the extension line of the first side 1111 and the extension line of the second side 1112, and the center of the circle is located outside the first side 1111 and the second side 1112. When the connection between the first side 1111 and the second side 1112 is a right angle, the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 is located on the first side 1111 and on the second side 1112.

[0084] The orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a, and is located in a circular area with the intersection as the center and 1 / 16 of the wavelength of the first target frequency band as the radius. It can be seen that the current weak point area 110a where the orthographic projection of the feeding point P on the floor 111 is located is fan-shaped or fan-like.

[0085] When the current weak point area 110a is selected as an area with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center and 1 / 16 of the wavelength of the first target frequency band as the radius, the current in the area is relatively weak. The orthographic projection of the feeding point P on the floor 111 is set in the current weak point area 110a, which can further better excite the excitation current in the same extension direction of the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the first target frequency band.

[0086] Please read further Figure 7 The floor 111 includes two first sides 1111 disposed opposite to each other, and two second sides 1112 disposed opposite to each other. The number of the current weak point areas 110a is four. The positive projection of the feeding point P on the floor 111 is located in any one of the four current weak point areas 110a, and the radiator 120 is adjacent to the current weak point area 110a disposed by the feeding point P.

[0087] In this embodiment, the number of the current weak area 110a is four, and the orthographic projection of the feeding point P on the floor 111 can be located in any one of the four current weak area 110a, which makes the setting of the feeding point P more flexible. The radiator 120 is arranged adjacent to the current weak area 110a where the orthographic projection of the feeding point P on the floor 111 is located. For the convenience of description, the current weak area 110a is named as current weak area 110a (1), current weak area 110a (2), current weak area 110a (3) and current weak area 110a (4). In this embodiment, the orthographic projection of the feeding point P on the floor 111 is located in the current weak area 110a (1) as an example for illustration, and accordingly, the radiator 120 is arranged adjacent to the current weak area 110a (1).

[0088] In summary, the feed source S is connected to the radiator 120 by means of conductive springs or screws and other conductive parts, and the connection position can be an open end of the radiator 120 (the first open end 121 in this embodiment). The feed source S can be set in the current weak point area 110a, so that the longitudinal current distribution of the floor 111 with a high proportion can be satisfied. Specifically, the orthographic projection of the feed point P on the floor 111 is located in the current weak point area 110a, and is located in a circular area with the intersection as the center and 1 / 16 of the wavelength of the first target frequency band as the radius.

[0089] See also Fig.11 and Fig.12 , Fig.11 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig.12 Schematic diagram of an antenna assembly with an inductive device to reduce the size of the radiator. Fig.12 (a) is a schematic diagram of the antenna assembly 10 without the inductive device 130; Fig.12 (b) is a schematic diagram of an antenna assembly 10 provided with an inductive device 130. The antenna assembly 10 includes an inductive device 130. One end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feed point P. Fig.12 visible, Fig.12 In (b), the length of the radiator 120 of the antenna assembly 10 including the inductive device 130 is smaller.

[0090] In this embodiment, one end of the inductive device 130 in the antenna assembly 10 is electrically connected to the feed source S, and the other end is electrically connected to the feeding point P, which is equivalent to connecting the feed source S in series with the inductive device 130 to the feeding point P of the radiator 120.

[0091] It should be noted that the so-called inductive device 130 refers to a device that exhibits inductive characteristics within the first target frequency band supported by the antenna assembly 10. The inductive device 130 may include at least one of the following: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel, as long as the inductive device 130 exhibits inductive characteristics within the first target frequency band supported by the antenna assembly 10.

[0092] Since the antenna assembly 10 provided in the embodiment of the present application has the orthographic projection of the feeding point P on the floor 111 located in the current weak point region 110a of the characteristic mode of the floor 111, it can better excite the excitation current in the same extension direction along the first side 1111. The floor 111 constitutes the main radiation branch of the first target frequency band and contributes most of the radiation of the antenna assembly 10, while the radiator 120 is equivalent to acting as the radiation driving device of the entire antenna assembly 10, becoming the excitation condition for the floor 111 to work in the first target frequency band, and the energy proportion of the radiator 120 is very small. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10. Fig.12 It can also be seen that the size of the radiator 120 in the antenna assembly 10 provided with the inductive device 130 is smaller.

[0093] The inductive device 130 can compensate for the insufficiency of the inductance caused by the miniaturization of the radiator 120 , so that the antenna assembly 10 has better antenna performance in the first target frequency band, and the antenna assembly 10 works better in the first target frequency band.

[0094] In this embodiment, the electrical length of the radiator 120 is satisfy: Wherein, λ1 is the wavelength of the electromagnetic wave signal in the first target frequency band.

[0095] In this embodiment, the frequency of the second target frequency band is greater than the frequency of the first target frequency band, and therefore, the electrical length of the radiator 120 is determined by the first target frequency band.

[0096] The radiator 120 is in an open-circuit state at both ends. The length of the radiator 120 refers to the length of the extension path between the first open-circuit end 121 and the second open-circuit end 122. Considering the need for miniaturization of the radiator 120, the electrical length of the radiator 120 is Select less than or equal to At the same time, it is considered that if the physical length of the induction device 130 replacing the radiator 120 is too large, more energy loss will be introduced. Therefore, the electrical length of the radiator 120 is selected as In summary, the electrical length of the radiator 120 provided in the embodiment of the present application is satisfy: On the one hand, the size of the radiator 120 can be made smaller, and on the other hand, the antenna assembly 10 can have smaller energy loss when supporting the first target frequency band.

[0097] It should be noted that the electrical length of the radiator 120 satisfies the following formula:

[0098] Wherein, L is the physical length of the radiator 120, a is the transmission time of the electromagnetic wave signal of the first target frequency band in the radiator 120, and b is the transmission time of the electromagnetic wave signal of the first target frequency band in free space.

[0099] See also Fig.13 , Fig.13 A schematic diagram of a partial structure of an antenna assembly provided in one embodiment of the present application. The inductive device 130 includes an inductor 130a. The inductor 130a may be a single inductor, or may be a series inductor formed by connecting a plurality of inductors in series. When the inductor 130a includes a series inductor formed by connecting a plurality of inductors in series, one end of the series inductor is electrically connected to the feed point P, and the other end of the series inductor is electrically connected to the feed source S. In the schematic diagram of this embodiment, the inductive device 130 includes an inductor 130a as an example for illustration.

[0100] The following is a detailed description of the antenna assembly 10 provided in one embodiment. Fig.14 , Fig.14A partial structural schematic diagram of an antenna assembly provided for one embodiment of the present application. The inductive device 130 includes N+1 inductors 130a. The N+1 inductors 130a are connected in series to form a series inductor, one end of the series inductor is electrically connected to the feed point P, and the other end of the series inductor is electrically connected to the feed source S. Two adjacent inductors 130a in the series inductor are connected and have a connection point. It can be seen that the N+1 inductors 130a are connected in series to form a series inductor, and the N+1 inductors have N connection points. Correspondingly, the antenna assembly 10 also includes a switch unit 150, and the switch unit 150 has a common terminal 151 (also called RFC) and N ports 152 (also called RFX, where X refers to the number of other ports in the switch unit 150 except RFC, and when the switch unit 150 is SPNT, X is T in SPNT). One end of the common terminal 151 is electrically connected to the feed source S, and the common terminal 151 can be electrically connected to at least one of the N ports 152. The port 152 is electrically connected to the connection point, and different ports 152 are electrically connected to different connection points. In other words, the connection point of two adjacent inductors 130a is electrically connected to one of the N ports 152, and different connection points are electrically connected to different ports 152. When the common terminal 151 is electrically connected to different ports 152 among the N ports 152, or when the common terminal 151 is electrically disconnected from the N ports 152, the inductance values ​​of the series inductors are different, so that the operating frequency bands in the first target frequency band supported by the antenna assembly 10 are different. It should be noted that the N ports 152 of the switch unit 150 described here are not all the ports in the switch unit 150, but refer to the ports connected to the connection point between two adjacent inductors among the N+1 inductors 130a.

[0101] In this embodiment, N≥1, and N is a positive integer. The antenna assembly 10 provided in this embodiment, through the switch unit 150 and N+1 inductors 130a, the common end 151 is electrically connected to different ports 152, or the common end 151 is electrically connected to the N ports 152, so that the inductance values ​​of the series inductors are different, and thus the operating frequencies of the first target frequency band supported by the antenna assembly 10 are different. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can support more operating frequency bands and has better communication performance.

[0102] The antenna assembly 10 provided in a specific embodiment of the present application is introduced below. The N ports 152 include a first end 1521 (also referred to as RF1) and a second end 1522 (also referred to as RF2). The N+1 inductors 130a include a first inductor L1, a second inductor L2, and a third inductor L3. One end of the first inductor L1 is electrically connected to the feed point P, and the other end is electrically connected to the first end 1521. One end of the second inductor L2 is electrically connected to the other end of the first inductor L1, and the other end of the second inductor L2 is electrically connected to the second end 1522. One end of the third inductor L3 is electrically connected to the other end of the second inductor L2, and the other end of the third inductor L3 is electrically connected to the feed source S and the common end 151. When the common terminal 151 is electrically connected to the first terminal 1521, the antenna assembly 10 supports a first frequency band in the first target frequency band; when the common terminal 151 is electrically connected to the second terminal 1522, the antenna assembly 10 supports a second frequency band in the first target frequency band. When the common terminal 151 is electrically disconnected from the first terminal 1521 and the common terminal 151 is electrically disconnected from the second terminal 1522, the antenna assembly 10 supports a third frequency band in the first target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, and the frequency of the second frequency band is greater than the frequency of the third frequency band.

[0103] It can be understood that in the schematic diagram of this embodiment, N=2 is used as an example for illustration. It can be understood that this should not be understood as a limitation on the embodiments of the present application. In other embodiments, N can also be equal to 1, or 3, or 4, etc., as long as N≥1 is satisfied and N is a positive integer.

[0104] When the common end 151 is electrically connected to the first end 1521, and the common end 151 is electrically disconnected from the second end 1522, it is equivalent to that the second inductor L2 and the third inductor L3 are both short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feeding point P is the inductance value of the first inductor L1, and the first frequency band supported by the antenna assembly 10 is the frequency band with the highest frequency in the first target frequency band.

[0105] When the common end 151 is electrically connected to the second end 1522, and the common end 151 is electrically disconnected from the first end 1521, it is equivalent to that the third inductor L3 is short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feeding point P is the sum of the inductance value of the first inductor L1 and the inductance value of the second inductor L2. The second frequency band supported by the antenna assembly 10 is a frequency band in the middle of the first target frequency band.

[0106] When the common terminal 151 is electrically disconnected from the first terminal 1521, and the common terminal 151 is also electrically disconnected from the second terminal 1522, the first inductor L1, the second inductor L2, and the third inductor L3 are not short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feed point P is the sum of the inductance values ​​of the first inductor L1, the second inductor L2, and the third inductor L3, and the third frequency band supported by the antenna assembly 10 is the lowest frequency band in the first target frequency band.

[0107] The switch unit 150 may be, but is not limited to, a single-pole four-throw switch (SP4T) or a single-pole double-throw switch (SPDT). The antenna assembly 10 provided in this embodiment realizes the switching of any one of the first frequency band, the second frequency band and the third frequency band in the first target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0108] In one implementation, the first target frequency band is a low frequency band, the first frequency band is a B8 frequency band, the second frequency band is a B20 frequency band, and the third frequency band is a B28 frequency band.

[0109] In addition, the switch unit 150 also includes other ports (including at least one) and other inductors (including at least one), and the other ports are electrically connected to the corresponding inductors to the ground. When the common terminal 151 is electrically connected to the other ports, the inductors electrically connected to the other ports are connected in parallel to the path between the feed source S and the feeding point P, so as to fine-tune the frequency band supported by the antenna assembly 10 (for example, the frequency band between the third frequency band and the first frequency band). The two embodiments in which the switch unit 150 also includes the third terminal 1523 and the fourth inductor L4, and the switch unit 150 includes the third terminal 1523, the fourth terminal 1524, the fourth inductor L4 and the fifth inductor L5 will be described in detail later.

[0110] For further information, see Fig.15 , Fig.15A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include two ports, namely a first end 1521 and a second end 1522. The N+1 inductors 130a include three inductors 130a, namely a first inductor L1, a second inductor L2 and a third inductor L3. The first end 1521 (also referred to as RF1), the second end 1522 (also referred to as RF2), the first inductor L1, the second inductor L2 and the third inductor L3 can refer to the previous description and will not be repeated here. Further, in this embodiment, the switch unit 150 also has a third end 1523 (also referred to as RF3). Correspondingly, the inductive device 130 also includes a fourth inductor L4. One end of the fourth inductor L4 is electrically connected to the third end 1523, and the other end of the fourth inductor L4 is grounded. When the common terminal 151 is electrically connected to the second terminal 1522 and the common terminal 151 is electrically connected to the third terminal 1523, the antenna assembly 10 supports a fourth frequency band, wherein the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band. It should be noted that the port in the N ports 152 included in the switch unit 150 mentioned above refers to a port connected to the connection point of two adjacent inductors 130a in the N+1 inductors 130a forming a series inductance. The third terminal 1523 is not connected to the connection point of two adjacent inductors 130a in the N+1 inductors 130a forming a series inductance. Therefore, the third terminal 1523 here does not belong to one of the N ports 152 included in the switch unit 150 when the inductive device 130 includes N+1 inductors 130a mentioned above.

[0111] The inductive device 130 also includes the fourth inductor L4, and the fourth inductor L4 is used to perform fine-tuning on the basis of the first frequency band, the second frequency band and the third frequency band. For example, when the common terminal 151 is electrically connected to the second terminal 1522, and the common terminal 151 is electrically connected to the third terminal 1523, it is equivalent to connecting the fourth inductor L4 to the ground in parallel on the basis of the antenna component 10 supporting the second frequency band, thereby fine-tuning the second frequency band supported by the antenna component 10 to the fourth frequency band, and completing the switching of the fourth frequency band. In one embodiment, the frequency of the fourth frequency band is greater than the frequency of the second frequency band, therefore, the inductive device 130 also includes the fourth inductor L4 which can pull the second frequency band supported by the antenna component 10 up to the fourth frequency band, and completing the switching of the fourth frequency band. In one embodiment, the fourth frequency band partially overlaps with the second frequency band, and the other part is different.

[0112] The antenna assembly 10 provided in the embodiment of the present application can support more operating frequencies and have better communication performance by setting the fourth inductor L4.

[0113] In this implementation, the second frequency band is the B20 frequency band, and the fourth frequency band is the B5 frequency band.

[0114] For further information, see Fig.16 , Fig.16 A partial structural diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521 (also referred to as RF1), a second end 1522 (also referred to as RF2) and a third end 1523 (also referred to as RF3). The N+1 inductors 130a include a first inductor L1, a second inductor L2 and a third inductor L3. The inductive device 130 also includes a fourth inductor L4. The first end 1521, the second end 1522, the third end 1523, the first inductor L1, the second inductor L2, the third inductor L3 and the fourth inductor L4 can refer to the previous description and will not be repeated here.

[0115] Further, in this embodiment, the switch unit 150 also has a fourth end 1524 (also referred to as RF4). Correspondingly, the inductive device 130 also includes a fifth inductor L5. One end of the fifth inductor L5 is electrically connected to the fourth end 1524, and the other end of the fifth inductor L5 is electrically connected to the ground. When the common end 151 is electrically disconnected from the fourth end 1524, and when the antenna assembly 10 supports a corresponding frequency band in the first target frequency band, the antenna assembly 10 supports a transmission frequency band of the corresponding frequency band, wherein the corresponding frequency band includes any one of the first frequency band, the second frequency band and the third frequency band. When the common end 151 is electrically connected to the fourth end 1524, the antenna assembly 10 supports a reception frequency band of the corresponding frequency band in the first target frequency band. It should be noted that the ports in the N ports 152 included in the switch unit 150 mentioned above refer to ports connected to the connection points of two adjacent inductors 130a in the N+1 inductors 130a forming the series inductance. The fourth end 1524 is not connected to the connection point of two adjacent inductors 130a among the N+1 inductors 130a forming the series inductance. Therefore, the fourth end 1524 here does not belong to one of the N ports 152 included in the switch unit 150 when the inductive device 130 includes N+1 inductors 130a mentioned above.

[0116] The corresponding frequency bands in the first target frequency band (for example, the first frequency band, the second frequency band, and the third frequency band) include a transmitting frequency band and a receiving frequency band, and the frequency of the transmitting frequency band in the corresponding frequency band is slightly different from the frequency of the receiving frequency band. Generally speaking, the frequency of the receiving frequency band in the corresponding frequency band is higher than the frequency of the transmitting frequency band in the corresponding frequency band. For example, the first frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the first frequency band is higher than the frequency of the transmitting frequency band in the first frequency band; the second frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the second frequency band is higher than the frequency of the transmitting frequency band in the second frequency band; the third frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the third frequency band is higher than the frequency of the transmitting frequency band in the third frequency band.

[0117] When the common terminal 151 (also called RFC) is electrically disconnected from the fourth terminal 1524, and the antenna assembly 10 supports the corresponding frequency band in the first target frequency band, the antenna assembly 10 supports the transmitting frequency band in the corresponding frequency band; when the common terminal 151 is electrically connected to the fourth terminal 1524, the antenna assembly 10 supports the receiving frequency band of the corresponding frequency band in the first target frequency band. Thus, the receiving frequency band and the transmitting frequency band of the first frequency band can be switched, the receiving frequency band and the transmitting frequency band of the second frequency band can be switched, and the transmitting frequency band and the receiving frequency band of the third frequency band can be switched, so that the antenna assembly 10 has better performance when supporting the receiving frequency band and the transmitting frequency band of the corresponding frequency band.

[0118] It should be noted that, in this embodiment, the status of the third end 1523 and the fourth end 1524 are equivalent. When the common end 151 is electrically connected to the third end 1523, the frequency band supported by the antenna assembly 10 can be fine-tuned, and can also be used to fine-tune the specific frequency of the frequency band supported by the antenna assembly 10. Correspondingly, in this embodiment, when the common end 151 is electrically connected to the fourth end 1524, the frequency band supported by the antenna assembly 10 can be fine-tuned); it can also be used to fine-tune the specific frequency in the frequency band supported by the antenna assembly 10. In this embodiment, the frequency band supported by the antenna assembly 10 is adjusted when the common end 151 is electrically connected to the third end 1523 as an example for explanation, and the frequency of the frequency band supported by the antenna assembly 10 is fine-tuned when the common end 151 is electrically connected to the third end 1523 as an example for explanation, which should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. It can be understood that in one embodiment, the corresponding frequency bands in the first target frequency band supported by the antenna assembly (for example, the first frequency band, the second frequency band, and the third frequency band) are frequency division duplex (FDD), and the transmitting frequency band and the receiving frequency band in the corresponding frequency band are different.

[0119] See also Fig.17 , Fig.17 A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521 and a second end 1522. The N+1 inductors 130a include a first inductor L1, a second inductor L2, and a third inductor L3. In addition, the switch unit 150 also includes a third end 1523 and a fourth end 1524, and correspondingly, the inductive device 130 also includes a fourth inductor L4 and a fifth inductor L5. The first end 1521, the second end 1522, the third end 1523, the fourth end 1524, the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, and the fifth inductor L5, etc., can refer to the previous description, and will not be repeated here. It should be noted that the N ports 152 are illustrated as including two ports, namely the first end 1521 and the second end 1522, and the N ports 152 do not include the third end 1523 and the fourth end 1524. Accordingly, the N+1 inductors 130 a include a first inductor L1 , a second inductor L2 , and a third inductor L3 , and the N+1 inductors 130 a do not include the fourth inductor L4 and the fifth inductor L5 .

[0120] Further, in this embodiment, the inductive device 130 further includes a sixth inductor L6, one end of the sixth inductor L6 is electrically connected to the connection point between the feed source S and the third inductor L3, and the other end of the sixth inductor L6 is grounded. It can be understood that the N+1 inductors 130a include the first inductor L1, the second inductor L2 and the third inductor L3, and the N+1 inductors 130a do not include the fourth inductor L4, the fifth inductor L5 and the sixth inductor L6.

[0121] The sixth inductor L6 can improve the matching state of the antenna assembly 10, so that when the antenna assembly 10 supports various frequency bands, the output impedance of the feed source S and the common input impedance of the first radiation arm and the second radiation arm are more matched, so that the energy of the excitation signal output by the feed source S is more loaded to the first radiation arm and the second radiation arm, so that the antenna performance of the antenna assembly 10 is better.

[0122] It can be seen that the feed source S and the inductive device 130 are equivalent to direct-fed inductive excitation for the radiator 120. One end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feeding point P of the radiator 120, which is equivalent to the inductive device 130 being connected in series between the feed source S and the radiator 120. The inductive device 130 provides inductive compensation for the antenna assembly 10, thereby miniaturizing the radiator 120. The switch unit 150 uses SP4T, and the common end 151 of the switch unit 150 and two of its ports 152 (RF port 152, i.e., the first end 1521 and the second end 1522) have different connection points of the inductor 130a (i.e., connected in a stepped manner). The total inductance value on the feeding path from the feed source S to the radiator 120 is controlled by the switch unit 150, and the other two ports (the third end 1523 and the fourth end 1524) of the switch unit 150 are connected to the ground by other inductors (the third end 1523 is electrically connected to the fourth inductor L4, and the fourth end 1524 is electrically connected to the fifth inductor L5), so as to achieve fine adjustment of the frequency, thereby achieving switching between adjacent frequency bands, such as switching from the B20 band to the B5 band, or achieving switching of the receiving band and the transmitting band of the corresponding frequency band in the first target frequency band.

[0123] In addition, in the antenna assembly 10 provided in the embodiment of the present application, the switch unit 150 adopts a step-by-step access switch usage method, which can reduce the additional loss caused by the switch.

[0124] At least one of the first inductor L1, the second inductor L2 and the third inductor L3 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel.

[0125] For example, the first inductor L1 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. As long as the first inductor L1 has an inductance characteristic within the first target frequency band supported by the antenna assembly 10, it is sufficient.

[0126] The second inductor L2 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. As long as the second inductor L2 has an inductance characteristic within the first target frequency band supported by the antenna assembly 10, it is sufficient.

[0127] The third inductor L3 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. As long as the third inductor L3 has an inductance characteristic within the first target frequency band supported by the antenna assembly 10, it is sufficient.

[0128] It should be noted that when the inductive device 130 further includes a fourth inductor L4, the fourth inductor L4 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. It is sufficient that the fourth inductor L4 has an inductance characteristic within the first target frequency band supported by the antenna assembly 10.

[0129] When the inductive device 130 further includes a fifth inductor L5, the fifth inductor L5 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. It is sufficient that the fifth inductor L5 has an inductance characteristic within the first target frequency band supported by the antenna assembly 10.

[0130] When the inductive device 130 further includes a sixth inductor L6, the sixth inductor L6 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. It is sufficient that the sixth inductor L6 has an inductance characteristic within the first target frequency band supported by the antenna assembly 10.

[0131] To summarize, the common end 151 and two of the ports 152 of the switch unit 150 in the antenna assembly 10 provided in the embodiment of the present application are connected to the series inductor 130 in a stepped manner, and the total inductance of the feeding path is controlled by switching on and off; the other two ports 152 are connected to the ground by connecting the additional inductor 130 to fine-tune the frequency to achieve switching of adjacent frequency bands, such as switching from the B20 band to the B5 band, or adjusting the transmission band or the receiving band TRX of the corresponding frequency band supported by the antenna assembly 10. In this embodiment, the series inductive device 130 of the path is a first inductor L1, a second inductor L2 and a third inductor L3, the first end 1521 is connected between the first inductor L1 and the second inductor L2, the second end 1522 is connected between the second inductor L2 and the third inductor L3, the common end 151 is connected between the third inductor L3 and the feeding port 152, the third end 1523 is connected to the ground of the fourth inductor L4, the fourth end 1524 is connected to the ground of the fifth inductor L5, and the sixth inductor L6 is connected as a parallel inductive device 130 after all the series inductive devices 130 and connected to the ground, so as to improve the matching state of the path.

[0132] The on or off state of the port (also referred to as RFX (X is 1, 2, 3, 4)) in the following description refers to the on and off state of the RFX port and the common terminal 151 (also referred to as RFC). When RF1 is on and other RFs are off, it is equivalent to the second inductor L2 and the third inductor L3 being short-circuited by RF1. At this time, the series inductance value on the path is the first inductor L1, which should correspond to the frequency band with the highest low frequency, such as the B8 frequency band; when RF2 is on and other RFs are off, it is equivalent to the third inductor L3 being short-circuited by RF2. At this time, the series inductance value on the path is the first inductor L1 + the second inductor L2, which should correspond to the frequency band with a low frequency in the middle, such as the B20 frequency band; when all RFs are off, it is equivalent to all series inductive devices 130 not being short-circuited. At this time, the series inductance value on the path is the first inductor L1 + the second inductor L2 + the third inductor L3, which should correspond to the frequency band with the lowest low frequency, such as the B28 frequency band. RF3 and RF4 can fine-tune the frequencies of the above-mentioned frequency bands. For example, when RF2 and RF3 are connected (that is, the common end 151 is connected to RF2, and the common end 151 is connected to RF3), it is equivalent to connecting the fourth inductor L4 to the ground in parallel on the basis of the above-mentioned B20 frequency band, which can increase the B20 frequency to the B5 frequency band and complete the switching of the B5 frequency band state; at the same time, in the B8 frequency band, B20 frequency band, and B28 frequency band states, RF4 can also be connected to perform TRX frequency switching for their respective states to improve RX performance.

[0133] Next, taking the first frequency band as the B8 frequency band, the second frequency band as the B20 frequency band, the third frequency band as the B28 frequency band, and the fourth frequency band as the B5 frequency band as an example, a method for determining the inductance values ​​of the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6 in the antenna assembly 10 provided in an embodiment of the present application is described.

[0134] The antenna assembly 10 provided in this embodiment can be switched from 700MHz to 960MHz to cover all frequency bands in the low frequency band. The specific setting can first make the common end 151 and the first end 1521 electrically connected separately (also called the first end 1521 is turned on separately), and the antenna assembly 10 works in the first frequency band (the B8 frequency band in this embodiment), thereby determining the inductance value of the first inductor L1 and the inductance value of the sixth inductor L6. The common end 151 and the second end 1522 are electrically connected separately (also called the second end 1522 is turned on separately), and the antenna assembly 10 works in the second frequency band (the B20 frequency band in this embodiment), thereby determining the inductance value of the second inductor L2. Then the common terminal 151 is disconnected from all ports 152 (the first terminal 1521, the second terminal 1522, the third terminal 1523 and the fourth terminal 1524 in this case) (All off), and the antenna assembly 10 operates in the third frequency band (the B28 frequency band in this embodiment), thereby determining the inductance value of the third inductor L3. Then the common terminal 151 is electrically connected to the second terminal 1522 and the common terminal 151 is electrically connected to the third terminal 1523, and the antenna assembly 10 supports the fourth frequency band, thereby determining the inductance value of the fourth inductor L4. The transmission and reception (TRX) performance optimization status of each frequency band of the first frequency band, the second frequency band, the third frequency band and the fourth frequency band can be debugged according to the needs of the actual project to determine the inductance value of the fifth inductor L5.

[0135] Please also read Fig.18 , Fig.18 for Fig.17 Schematic diagram of S parameter curves of various frequency bands of the first target frequency band in the antenna assembly shown. In this schematic diagram, the horizontal axis is frequency, the unit is GHz, and the vertical axis is S parameters (S Parameters), the unit is dB. Curve ① is the curve of the B8 frequency band; curve ② is the curve of the B20 frequency band; curve ③ is the curve of the B28 frequency band; curve ④ is the B5 frequency band. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can support more operating frequency bands in the first target frequency band and has better performance.

[0136] In addition, according to the foregoing introduction, in the antenna assembly 10 provided in the embodiment of the present application, the floor 111 of the circuit board 110 constitutes the main radiation branch of the first target frequency band, contributing most of the radiation of the antenna assembly 10, and the radiator 120 is equivalent to acting as a radiation driving device for the entire antenna assembly 10, becoming an excitation condition for the floor 111 to work in the first target frequency band, and the energy of the radiator 120 accounts for a very small proportion. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10. The antenna assembly 10 that does not adopt the embodiment of the present application and the antenna assembly 10 provided in the embodiment of the present application (the size of the radiator 120 is smaller than that of the radiator 120 that does not adopt the embodiment of the present application) will be compared below.

[0137] Please also read Fig.19 , Fig.19 Schematic diagram of an antenna assembly that does not adopt the embodiment of the present application and an antenna assembly provided by the embodiment of the present application. Fig.19 (a) is an antenna assembly 10 using the embodiment of the present application; Fig.19 (b) is the antenna assembly 10 provided in the embodiment of the present application. The antenna assembly 10 that does not adopt the embodiment of the present application adopts the radiator 120 as the main radiating part of the antenna assembly 10, which is a composite left-right-handed transmission line (CRLH) scheme. When the antenna assembly 10 supports the low-frequency band, the length L1 of the radiator 120 is 40 mm. In the antenna assembly 10 provided in the embodiment of the present application, the floor 111 is the main radiating part of the first target frequency band, and the length L2 of the radiator 120 is smaller than the length L1 of the radiator 120 in the antenna assembly 10 that does not adopt the embodiment of the present application, that is, L2<L1. The length of the radiator 120 of the antenna assembly 10 provided in the embodiment of the present application is 20 mm, which is 50% smaller than the size of the radiator 120 of the antenna assembly 10 that does not adopt the embodiment of the present application. Please refer to Fig. 20 , Fig. 20The figure is a schematic diagram comparing the system efficiency of each frequency band in free space of the first target frequency band supported by the antenna assembly of the present application and the antenna assembly of the present application without adopting the implementation scheme of the present application. Among them, the English word for free space is Free Space, which is abbreviated as FS in the figure, and the system efficiency of free space is abbreviated as FS system efficiency. The B8 frequency band, the B5 frequency band and the B28 frequency band are compared, among which, the performance of the antenna assembly 10 provided in the implementation scheme of the present application in the B28 frequency band is better than the performance of the antenna assembly 10 in the B28 frequency band not adopting the implementation scheme of the present application, and the system efficiency of free space is improved by more than 1dB. In addition, the performance of the antenna assembly 10 provided in the implementation scheme of the present application in the B8 frequency band is not much different from the antenna performance of the antenna assembly 10 in the B8 frequency band not adopting the implementation scheme of the present application; accordingly, the performance of the antenna assembly 10 provided in the implementation scheme of the present application in the B5 frequency band is not much different from the antenna performance of the antenna assembly 10 in the B5 frequency band not adopting the implementation scheme of the present application.

[0138] In the antenna assembly 10 provided in the previous embodiment, a portion of the radiator 120 in the antenna assembly 10 is arranged corresponding to the first side 1111, and another portion of the radiator 120 is arranged corresponding to the second side 1112. It can be understood that this should not constitute a limitation on the embodiment of the present application. Please refer to Fig.21 and Fig. 22 , Fig.21 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig. 22 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application. Fig.21 In the figure, the radiator 120 is arranged corresponding to the first side 1111. It can be understood that in the schematic diagram of this embodiment, the radiator 120 is arranged corresponding to the first side 1111 on the right side for illustration. In other embodiments, the radiator 120 can also be arranged corresponding to the first side 1111 on the left side, as long as the orthographic projection of the feed point P on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111.

[0139] exist Fig. 22 In the embodiment, the radiator 120 is arranged corresponding to the second side 1112. It can be understood that in the schematic diagram of this embodiment, the radiator 120 is arranged corresponding to the second side 1112 at the top as an example. In other embodiments, the radiator 120 can also be arranged corresponding to the second side 1112 at the bottom.

[0140] It can be understood that no matter where the radiator 120 is arranged, the orthographic projection of the feeding point P of the radiator 120 on the floor 111 is arranged in the current weak point area 110a adjacent to the radiator 120, and the orthographic projection of the feeding point P on the floor 111 falls in the current weak point area 110a, so that the feed source S is electrically connected to the feeding point P. Fig.21 and Fig. 22 The feed source S and the electrical connector 160 are not shown in the figure. For the positions of the feed source S and the electrical connector 160, please refer to Figure 1 The position of the feed source S and the electrical connector 160.

[0141] In this embodiment, the radiator 120 can be set corresponding to the first edge 1111, and the radiator 120 can also be set corresponding to the second edge 1112. Part of the radiator 120 is set corresponding to the first edge 1111, and the other part of the radiator 120 is set corresponding to the second edge 1112. It can be seen that the setting of the radiator 120 is relatively flexible, so that when the antenna assembly 10 is applied to the electronic device 1, it is convenient to assemble it with other devices in the electronic device 1.

[0142] See also Fig.23 , Fig.23 A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The antenna assembly 10 also includes a switch unit 150. The switch unit 150 has a common terminal 151 and N ports 152, one end of the common terminal 151 is electrically connected to the feed source S, and the common terminal 151 can be electrically connected to at least one of the N ports 152. The inductive device 130 includes a first inductor L1 and N inductors 130a. One end of the first inductor L1 is electrically connected to the feed source S, and the other end is electrically connected to the feed point P. One end of the inductor 130a is electrically connected to the feed point P, and the other end of the inductor 130a is electrically connected to the port 152, and different inductors 130a are electrically connected to different ports 152. When the common terminal 151 is electrically connected to different ports 152, or the common terminal 151 is disconnected from the N ports 152, the inductance value of the inductive device 130 is different, so that the operating frequency bands in the first target frequency band supported by the antenna assembly 10 are different. It should be noted that the ports among the N ports 152 of the switch unit 150 refer to the ports connected to the inductor 130a, not all the ports in the switch unit 150.

[0143] In this embodiment, N≥1, and N is a positive integer. The antenna assembly 10 provided in this embodiment, through the switch unit 150, the first inductor L1 and the N inductors 130a, the common end 151 is electrically connected to different ports 152, or the common end 151 is disconnected from the N ports 152, so that the operating frequency of the first target frequency band supported by the antenna assembly 10 is different. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can support more operating frequency bands and has better communication performance.

[0144] It should be noted that the common terminal 151 being disconnected from the N ports 152 means that the common terminal 151 is disconnected from any one of the N ports 152 .

[0145] The antenna assembly 10 provided in a specific embodiment of the present application is introduced below. The N ports 152 include a first end 1521, a second end 1522 and a third end 1523. The N inductors 130a include a second inductor L2, a third inductor L3 and a fourth inductor L4. One end of the second inductor L2 is electrically connected to the feed point P, and the other end is electrically connected to the first end 1521. One end of the third inductor L3 is electrically connected to the feed point P, and the other end is electrically connected to the second end 1522. One end of the fourth inductor L4 is electrically connected to the feed point P, and the other end is short-connected to the third end 1523. When the common end 151 is electrically connected to different ports among the N ports 152, the antenna assembly 10 can support different frequency bands in the first target frequency band. In this embodiment, when the common end 151 is electrically connected to different ports among the first end 1521, the second end 1522, and the third end 1523, the antenna assembly 10 can support different frequency bands in the first target frequency band. As for the size of the frequency band supported by the antenna assembly 10 when the common terminal 151 is electrically connected to different ports among the N ports 152, it is related to the values ​​of the first inductor L1, the second inductor L2, the third inductor L3 and the fourth inductor L4. When the common terminal 151 is electrically disconnected from the N ports 152, when the antenna assembly 10 supports the first target frequency band, the path between the feed source S and the feeding point P has the first inductor L1. At this time, for the first target frequency band, the inductance value connected to the path is the largest and the frequency is the lowest. When the common terminal 151 is electrically connected to a port among the N ports 152, the inductor 130a connected to the corresponding port is connected in parallel with the first inductor L1, and the inductance value after parallel connection is less than the inductance value of the first inductor L1. When the common terminal 151 is electrically connected to different ports among the N ports 152, the frequency band when the antenna assembly 10 supports the first target frequency band is related to the size of the inductor 130a. For example, in one embodiment, when the common terminal 151 is electrically connected to the third terminal 1523, the antenna assembly 10 supports a first frequency band in the first target frequency band. When the common terminal 151 is electrically connected to the first terminal 1521, the antenna assembly 10 supports a second frequency band in the first target frequency band. When the common terminal 151 is electrically disconnected from the first terminal 1521, the common terminal 151 is electrically disconnected from the second terminal 1522, and the common terminal 151 is electrically disconnected from the third terminal 1523, the antenna assembly 10 supports a third frequency band in the first target frequency band.When the common end 151 is electrically connected to the second end 1522, the antenna assembly 10 supports the fourth frequency band in the first target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, the frequency of the second frequency band is greater than the frequency of the third frequency band, and the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band. In one embodiment, the frequency of the fourth frequency band may be greater than the frequency of the second frequency band. It can be understood that this embodiment is only an example and is not a limitation on the frequency size of each frequency band (first frequency band, second frequency band, third frequency band and fourth frequency band) when the antenna assembly 10 supports the first target frequency band.

[0146] It can be understood that in the schematic diagram of this embodiment, N=3 is used as an example for illustration. It can be understood that this should not be understood as a limitation on the embodiments of the present application. In other embodiments, N can also be equal to 1, or 2, or 4, etc., as long as N≥1 is satisfied and N is a positive integer.

[0147] When the common terminal 151 is electrically connected to the third terminal 1523, the inductance value of the inductive device 130 connected in series on the path from the feed source S to the radiator 120 is an equivalent value of the first inductor L1 and the fourth inductor L4 connected in parallel, and the equivalent value is less than the inductance value of the first inductor L1. At this time, the antenna assembly 10 is designed to support the fourth frequency band in the first target frequency band, such as the B5 frequency band.

[0148] When the common end 151 is electrically connected to the first end 1521, the inductance of the inductive device 130 connected in series on the path from the feed source S to the radiator 120 is an equivalent value of the first inductor L1 and the second inductor L2 connected in parallel, and the equivalent value is less than the inductance of the first inductor L1. At this time, a frequency band in the middle of the first target frequency band will be supported, named the second frequency band, for example, the B20 frequency band. It should be noted that the size of the second frequency band supported by the antenna assembly 10 and the size of the fourth frequency band supported by the antenna assembly 10 are related to the size of the second inductor L2 and the fourth inductor L4. When the second frequency band is the B20 frequency band and the fourth frequency band is the B5 frequency band, the fourth frequency band is greater than the second frequency band. At this time, the inductance of the fourth inductor L4 is less than the inductance of the second inductor L2.

[0149] When the common terminal 151 is electrically disconnected from the first terminal 1521, the common terminal 151 is electrically disconnected from the second terminal 1522, and the common terminal 151 is electrically disconnected from the third terminal 1523, the inductance value of the inductive device 130 connected in series on the path from the feed source S to the radiator 120 is the first inductance L1, corresponding to the lowest frequency band in the first target frequency band, named the third frequency band, for example, the B28 frequency band. It can be understood that when the antenna assembly 10 supports the third frequency band, when the switch unit 150 also includes other ports 152, the common terminal 151 is also electrically disconnected from the port 152.

[0150] When the common end 151 is electrically connected to the second end 1522, the perception of the inductive device 130 in series on the path from the feed source S to the radiator 120 is the equivalent value of the first inductance L1 and the third inductance L3, and the equivalent value is smaller than the inductance value of the first inductance L1. According to the needs of various working frequency bands supported by the first target frequency band, it is designed as a higher frequency band, named the fourth frequency band, for example, the B5 frequency band.

[0151] It can be understood that the antenna assembly 10 provided in the embodiment of the present application can also be designed through multiple passes to obtain that the antenna assembly 10 supports other frequency bands in the first target frequency band. For example, the common end 151 is electrically connected to the first end 1521, the common end 151 is electrically connected to the second end 1522, and the common end 151 is also electrically connected to the third end 1523, so that the antenna assembly 10 supports other frequency bands a (which can be named the fifth frequency band) in the first target frequency band. In other embodiments, the common end 151 is also electrically connected to any two of the first end 1521, the second end 1522 and the third end 1523, so that the antenna assembly 10 also supports other frequency bands in the first target frequency band. For example, when the common end 151 is electrically connected to the first end 1521 and the common end 151 is also electrically connected to the second end 1522, the antenna assembly 10 supports other frequency bands b (which can be named the sixth frequency band) in the first target frequency band; when the common end 151 is electrically connected to the first end 1521 and the common end 151 is also electrically connected to the third end 1523, the antenna assembly 10 supports other frequency bands c (which can be named the seventh frequency band) in the first target frequency band; when the common end 151 is electrically connected to the second end 1522 and the common end 151 is also electrically connected to the third end 1523, the antenna assembly 10 supports other frequency bands d (which can be named the eighth frequency band) in the first target frequency band.

[0152] The switch unit 150 may be, but is not limited to, a single-pole triple-throw switch (SP3T). The antenna assembly 10 provided in this embodiment realizes the switching of any one of the first frequency band, the second frequency band and the third frequency band in the first target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0153] In one implementation, the first target frequency band is a low frequency band, the first frequency band is a B8 frequency band, the second frequency band is a B20 frequency band, the third frequency band is a B28 frequency band, and the fourth frequency band is a B5 frequency band.

[0154] See also Fig.24 , Fig.24 A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521, a second end 1522 and a third end 1523. The N inductors 130a include a second inductor L2, a third inductor L3 and a fourth inductor L4. One end of the second inductor L2 is electrically connected to the feed point P, and the other end is electrically connected to the first end 1521. One end of the third inductor L3 is electrically connected to the feed point P, and the other end is electrically connected to the second end 1522. One end of the fourth inductor L4 is electrically connected to the feed point P, and the other end is short-connected to the third end 1523. When the common end 151 is electrically connected to the third end 1523, the antenna assembly 10 supports the first frequency band in the first target frequency band. When the common end 151 is electrically connected to the first end 1521, the antenna assembly 10 supports the second frequency band in the first target frequency band. When the common terminal 151 is electrically disconnected from the first terminal 1521, the common terminal 151 is electrically disconnected from the second terminal 1522, and the common terminal 151 is electrically disconnected from the third terminal 1523, the antenna assembly 10 supports the third frequency band in the first target frequency band. When the common terminal 151 is electrically connected to the second terminal 1522, the antenna assembly 10 supports the fourth frequency band in the first target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, the frequency of the second frequency band is greater than the frequency of the third frequency band, and the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band. In one embodiment, the frequency of the fourth frequency band may be greater than the frequency of the second frequency band.

[0155] Further, the switch unit 150 also has a fourth end 1524. The inductive device 130 also includes a fifth inductor L5. One end of the fifth inductor L5 is electrically connected to the fourth end 1524, and the other end of the fifth inductor L5 is electrically connected to the ground. When the common end 151 is electrically disconnected from the fourth end 1524, and when the antenna assembly 10 supports a corresponding frequency band in the first target frequency band, the antenna assembly 10 supports a transmission frequency band of the corresponding frequency band, wherein the corresponding frequency band includes any one of the first frequency band, the second frequency band and the third frequency band. When the common end 151 is electrically connected to the fourth end 1524, the antenna assembly 10 supports a reception frequency band of the corresponding frequency band in the first target frequency band. It should be noted that the ports in the N ports 152 of the switch unit 150 refer to the ports connected to the inductor 130a, not all the ports in the switch unit 150. The N ports 152 include a first end 1521 , a second end 1522 , and a third end 1523 . The fourth end 1524 is not electrically connected to the inductor 130 a . Therefore, the fourth end 1524 does not belong to the aforementioned N ports.

[0156] The corresponding frequency bands in the first target frequency band (for example, the first frequency band, the second frequency band, and the third frequency band) include a transmitting frequency band and a receiving frequency band, and the frequency of the transmitting frequency band in the corresponding frequency band is slightly different from the frequency of the receiving frequency band. Generally speaking, the frequency of the receiving frequency band in the corresponding frequency band is higher than the frequency of the transmitting frequency band in the corresponding frequency band. For example, the first frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the first frequency band is higher than the frequency of the transmitting frequency band in the first frequency band; the second frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the second frequency band is higher than the frequency of the transmitting frequency band in the second frequency band; the third frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the third frequency band is higher than the frequency of the transmitting frequency band in the third frequency band.

[0157] When the common end 151 is electrically disconnected from the fourth end 1524, and the antenna assembly 10 supports the corresponding frequency band in the first target frequency band, the antenna assembly 10 supports the transmitting frequency band in the corresponding frequency band; when the common end 151 is electrically connected to the fourth end 1524, the antenna assembly 10 supports the receiving frequency band of the corresponding frequency band in the first target frequency band, thereby realizing the switching of the receiving frequency band and the transmitting frequency band of the first frequency band, the switching of the receiving frequency band and the transmitting frequency band of the second frequency band, and the switching of the transmitting frequency band and the receiving frequency band of the third frequency band, so that the antenna assembly 10 has better performance when supporting the receiving frequency band and the transmitting frequency band of the corresponding frequency band.

[0158] In this implementation, the second frequency band is the B20 frequency band, and the fourth frequency band is the B5 frequency band.

[0159] See also Fig.25 , Fig.25 A partial structural diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521, a second end 1522, and a third end 1523. The N inductors 130a include a second inductor L2, a third inductor L3, and a fourth inductor L4. The switch unit 150 also has a fourth end 1524. The inductive device 130 also includes a fifth inductor L5. Please refer to the previous description for the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5, and the switch unit 150, etc., which will not be repeated here.

[0160] In this implementation, the inductive device 130 further includes a sixth inductor L6 , one end of the sixth inductor L6 is electrically connected to the feed source S, and the other end of the sixth inductor L6 is grounded.

[0161] The sixth inductor L6 can improve the matching state of the antenna assembly 10, so that when the antenna assembly 10 supports each frequency band of the first target frequency band, the output impedance of the feed source S and the common input impedance of the first radiation arm and the second radiation arm are more matched, so that the energy of the excitation signal output by the feed source S is more loaded to the first radiation arm and the second radiation arm, so that the antenna performance of the antenna assembly 10 is better.

[0162] In summary, in the antenna assembly 10 provided in the embodiment of the present application, the common terminal 151RFC and each port 152 are connected in parallel before and after the permanent series inductance device 130 of the path, and the total inductance value of the feeding path is controlled by the on-off switch; in addition, the RF port 152 can also be connected to the ground by connecting an additional inductance device 130, so as to fine-tune the frequency and achieve the switching of adjacent frequency bands, such as switching from the B20 band to the B5 band, or switching the TRX of a single frequency band. Fig.25For example, the permanent series inductive device 130 of the path is the first inductor L1, the first end 1521, the second end 1522, and the third end 1523 are respectively connected to the second inductor L2, the third inductor L3, and the fourth inductor L4 of the inductive device 130, and connected between the first inductor L1 and the antenna, the RFC is connected between the first inductor L1 and the feeding port 152, the fourth end 1524 is connected to the ground after being connected to the fifth inductor L5, and the sixth inductor L6 is connected to the port and grounded as a parallel inductive device 130 after all the series inductive devices 130, so as to improve the path matching state. The port (also referred to as RFX (X is 1, 2, 3, 4)) connected or disconnected state in the following description refers to the on-off state of the port and the common terminal 151 (also referred to as RFC). Specifically, (1) when the common terminal 151 in the switch unit 150 is not connected to any port, the inductance connected in series on the path is the first inductance L1, which corresponds to the lowest low-frequency band, such as the B28 band; (2) when the first terminal 1521 is connected, the inductance connected in series on the path is the equivalent inductance of the first inductance L1 and the second inductance L2 in parallel, which is smaller than the first inductance L1, so it corresponds to a low-frequency band in the middle, such as the B20 band; (3) when the second terminal 1522 is connected, the inductance connected in series on the path is the equivalent inductance of the first inductance L1 and the third inductance L3 in parallel, which can be designed to be in a higher frequency band, such as the second inductance L2, the third inductance L3, and the fourth inductance L4, according to the working frequency band requirements; similarly, (4) when the third terminal 1523 is connected, it can be designed to be in the B8 band. Of course, a multi-pass design is also possible, such as passing through the first end 1521, the second end 1522 and the third end 1523 at the same time to obtain more working states. The fourth end 1524 can be used to fine-tune the frequency of the above frequency band.

[0163] In summary, the antenna assembly 10 designed in the embodiment of the present application is also called a CCE radiation unit, which includes a feeding device and a radiator 120, and the two ends of the radiator 120 are in an open circuit state. The feeding device includes a feeding port 152, an antenna switch (i.e., the switch unit 150 described above), an antenna matching and a resonant path 170 (also called an LC resonant circuit). The antenna matching is located between the feeding port 152 and the electrical connection element connected to the radiator 120, which is usually a series inductive device 130 (for example, a first inductor L1, a second inductor L2, and a third inductor L3) and then a parallel inductive device 130 (for example, a fourth inductor L4, a fifth inductor L5, and a sixth inductor L6). The relative order of the CCE radiation unit is an electrical connection device (such as a spring or a screw), a resonant path 170 (also called an LC resonant circuit), a series inductive device 130, a parallel inductive device 130, and a feeding port 152. In this embodiment, the feeding device is equivalent to direct-feed inductive excitation, and the resonant path 170 is connected in parallel with the series inductive device 130, so that the second target frequency band with a higher frequency band is not affected by the series inductive device 130, and always resonates in the second target frequency band, which can meet the CA, or ENDC, or dual-card requirements of the first target frequency band and the second target frequency band. In one embodiment, when the first target frequency band is a low frequency band and the second target frequency band is a high frequency band, the CA, or ENDC, or dual-card requirements of the low frequency band and the high frequency band can be met.

[0164] The inductive device 130 connected in series provides inductive compensation for the radiating unit, so that the radiating unit can reach the electrical length required by the first target frequency band, thereby playing a role in miniaturization. The inductive device 130 can be a single inductor, or a plurality of inductors connected in parallel or in series, or a series-parallel form of a capacitor and an inductor, as long as it is finally inductive within the working frequency band. At the same time, there are usually three inductive devices 130 connected in series, corresponding to three different frequency bands of the first target frequency band, for example, the first frequency band (such as the B8 frequency band), the second frequency band (such as the B20 frequency band), and the third frequency band (such as the B28 frequency band), and the first frequency band, the second frequency band and the third frequency band in the first target frequency band are switched through the antenna switch. The switch unit 150 can be, but is not limited to, a single-pole four-throw switch (SP4T). The antenna assembly 10 provided in this embodiment realizes the switching of any one of the first frequency band, the second frequency band and the third frequency band in the first target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0165] In summary, the electronic device 1 provided in the embodiment of the present application applies the miniaturized antenna solution in the positive top area of ​​the electronic device 1 with a tight layout, sets the feeding point P of the radiator 120 in the current weak point area 110a of the mainboard with a smaller current (for example, the upper right corner area of ​​the back view), and connects to the radiator 120 through a conductive member (such as a spring or a screw) by direct feeding. The two ends of the radiator 120 are open-circuited, and the feeding point P can be connected to the open end at the top (for example, the first open end 121) through a conductive member. The radiator 120 extends downward from the open end in the vertical direction of the whole machine, with a length of about 20 mm, to form a second open end 122. At this time, the second target frequency band can be the N78 frequency band. Through the switch component introduced above, it is possible to switch from 700MHz to 960MHz, completing the coverage of each frequency band of the first target frequency band. At the same time, the working frequency band of the resonant path 170 is designed in the second target frequency band, and the second target frequency band remains unchanged while the various frequency bands in the first target frequency band are switched, meeting the CA, or EDNC or dual card requirements of each frequency band in the first target frequency band and the second target frequency band. Specifically, the resonant path 170 can be designed first, for example, the capacitance value of the resonant capacitor C0 in the resonant path 170 is 0.5pF, and the inductance value of the resonant inductor L0 is 3.9nH, so that the antenna component 10 works in the second target frequency band (N78 frequency band in this embodiment), and then single-pass RF1 (that is, only the common end 151 is electrically connected to the first end 1521), the antenna component 10 is switched to the first frequency band (such as B8 frequency band), and the values ​​of the first inductor L1 and the sixth inductor L6 are determined. Then, the second end 1522 is connected to a single connection (i.e., only the common end 151 is electrically connected to the second end 1522), the antenna assembly 10 is switched to the second frequency band (e.g., the B20 frequency band), and the value of the second inductor L2 is determined. Then, the common end 151 of the switch unit 150 is completely disconnected from each port (All off), and the antenna assembly 10 is switched to the third frequency band (e.g., the B28 frequency band), and the value of the third inductor L3 is determined. Finally, the second end 1522 is connected to the third end 1523 (i.e., the common end 151 is electrically connected to the second end 1522, and the common end 151 is electrically connected to the third end 1523), the antenna assembly 10 is switched to the fourth frequency band (e.g., the B5 frequency band), and the value of the fourth inductor L4 is determined. The optimization status of the receiving frequency band and the transmitting frequency band (TRX) of each frequency band can confirm the value of the fifth inductor L5 according to the actual project debugging.

[0166] The S parameters of the antenna assembly 10 of the electronic device 1 provided in one embodiment of the present application in each frequency band can be found in Fig.26 , Fig.26A schematic diagram of the S parameters of the antenna assembly in an electronic device provided in one embodiment of the present application. In this schematic diagram, the horizontal axis is the frequency in GHz, and the vertical axis is the S parameter in dB. Among them, curve ① is the curve when the antenna assembly 10 supports the fourth frequency band (the B5 frequency band in this embodiment), wherein point 1 is located on curve ① and point 1 is the resonant frequency of the fourth frequency band; curve ② is the curve when the antenna assembly 10 supports the first frequency band (the B8 frequency band in this embodiment), wherein point 2 is located on curve ② and point 2 is the resonant frequency of the first frequency band; curve ③ is the curve when the antenna assembly 10 supports the second frequency band (the B20 frequency band in this embodiment), wherein point 4 is located on curve ③ and point 4 is the resonant frequency of the second frequency band; curve ④ is the curve when the antenna assembly 10 supports the third frequency band (the B28 frequency band in this embodiment), and point 5 is located on curve ④ and point 5 is the resonant frequency of the third frequency band.

[0167] In summary, the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application can fully excite the longitudinal current of the floor 111 (such as the ground of the mainboard or the ground of the circuit board 110), and the performance of the antenna assembly 10 provided in the embodiment of the present application in the B28 frequency band is better than the performance of the antenna assembly 10 in the B28 frequency band not using the embodiment of the present application, and the system efficiency in free space is improved by more than 1dB.

[0168] In addition, by feeding the current weak point region 110a using the CCE method and supplementing the system inductance with the inductive device 130 (such as a series lumped inductor), the size of the radiator 120 can be reduced by 50% or more without affecting the antenna performance.

[0169] In addition, since the antenna assembly 10 provided in the embodiment of the present application can support the first target frequency band and the second target frequency band, the first target frequency band can be a low frequency band, and the second target frequency band can be a high frequency band, therefore, the bandwidth of the antenna assembly 10 can be expanded, reducing the pressure on the whole antenna design, and providing more possibilities for the antenna architecture design. In addition, the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application is triggered by the characteristic mode current distribution of the mainboard, and is fed in the current weak point area 110a by CCE, which fully excites the longitudinal current of the ground plane 111 (such as the ground of the mainboard, or the ground of the circuit board 110), generating low-frequency free space efficiency.

[0170] In addition, the radiator 120 as the driving device supplements the system inductance through the inductive device 130 (such as a series concentrated inductor), so that the electrical length of the radiator 120 satisfies Wherein, λ1 is the wavelength of the electromagnetic wave signal in the first target frequency band, and the size of the antenna is reduced by 50% or more compared with a conventional 1 / 4 wavelength antenna.

[0171] In addition, the switching components in the electronic device 1 provided in the embodiment of the present application and the switching modes of the various switch units 150 can ensure full-frequency switching of the first target frequency band (such as the low-frequency band).

[0172] In addition, the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application includes a resonant path 170 to ensure that the second target frequency band does not change when the frequency bands in the first target frequency band are switched, thereby meeting the CA, or ENDC, or dual-card requirements of the first target frequency band and the second target frequency band.

[0173] In addition, the embodiment of the present application further provides an electronic device 1. The electronic device 1 includes but is not limited to mobile phones, telephones, televisions, tablet computers (Pad), cameras, personal computers, laptop computers (Personal Computer, PC), vehicle-mounted devices, headphones, watches, wearable devices, base stations, vehicle-mounted radars, customer premise equipment (Customer Premise Equipment, CPE), large-screen terminals and other devices that can send and receive electromagnetic wave signals. In this application, the electronic device 1 is taken as a mobile phone as an example, and other devices can refer to the specific description in this application. In addition, the electronic device 1 can be, but is not limited to, a device with or without a display screen.

[0174] The electronic device 1 includes an antenna assembly 10 as provided in any of the above embodiments. Fig. 27 , Fig. 27 The present invention is a three-dimensional schematic diagram of an electronic device provided in one embodiment. The electronic device 1 also includes a device body 30. The antenna assembly 10 is carried by the device body 30. The device body 30 includes but is not limited to a display screen 310 and a housing 330 that are mutually covered and connected. The display screen 310 and the housing 330 cooperate to form a receiving space. The antenna assembly 10 can be arranged inside the housing 330 of the electronic device 1, or partially integrated with the housing 330, or partially arranged outside the housing 330.

[0175] The electronic device 1 also includes a battery, functional devices (the functional devices may include one or more of a camera module, a microphone, a receiver, a speaker, a face recognition module, and a fingerprint recognition module) and other devices that can realize the basic functions of the mobile phone, which will not be described in detail in this embodiment. It can be understood that the above introduction to the electronic device 1 is only an explanation of an environment in which the antenna assembly 10 is used, and the specific structure of the electronic device 1 should not be understood as a limitation on the antenna assembly 10 provided in this application.

[0176] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device includes an antenna assembly, the antenna assembly including: A floor, the floor comprising a first side and a second side connected by a bend, wherein the length of the first side is greater than the length of the second side; A radiator, wherein the radiator has a feeding point, the radiator is spaced apart from the floor, and an orthographic projection of the feeding point on the floor is located in a current weak point area of ​​a characteristic mode current of the floor; A feed source, the feed source being electrically connected to the feed point, and exciting the floor through the radiator to generate an excitation current in the same extension direction along the first side to support an electromagnetic wave signal of a first target frequency band; and the feed source further excites the radiator to support an electromagnetic wave signal of a second target frequency band, wherein the frequency of the second target frequency band is greater than the frequency of the first target frequency band; and A resonant path, one end of which is electrically connected to the feed source, and the other end of which is electrically connected to the feed point, and the resonant path is a bandpass circuit of the second target frequency band.

2. The electronic device according to claim 1, wherein: The resonant path includes a resonant inductor and a resonant capacitor connected in series.

3. The electronic device according to claim 2, characterized in that: The resonant path satisfies: Wherein, L0 is the inductance value of the resonant inductor in the resonant path, C0 is the capacitance value of the resonant capacitor in the resonant path, and f 21 is the upper sideband frequency in the second target frequency band, f 22 is the lower sideband frequency in the second target frequency band.

4. The electronic device according to claim 1, wherein: The antenna assembly comprises: a first resonance mode, wherein the first resonance mode supports the first target frequency band and is a quarter wavelength mode of the radiator; and A second resonance mode, wherein the second resonance mode supports the second target frequency band, and the second resonance mode is a half-wavelength mode of the radiator.

5. The electronic device according to claim 4, characterized in that: The electrical length of the radiator satisfy: Wherein, λ1 is the wavelength of the electromagnetic wave signal in the first target frequency band.

6. The electronic device according to claim 1, wherein: The antenna components all operate in a first target frequency band of 4G and a second target frequency band of 4G to support CA; or The antenna assembly operates in a first target frequency band of 4G and a second target frequency band of 5G to support ENDC; or The electronic device includes dual SIM cards, one of the dual SIM cards operates in the first target frequency band, and the other of the dual SIM cards operates in a second target frequency band.

7. The electronic device according to claim 1, wherein: The current weak point area is located in an area with an intersection of an extension line of the first side and an extension line of the second side as the center and a radius of 1 / 16 of the wavelength of the first target frequency band.

8. The electronic device according to claim 7, characterized in that: The floor comprises two first sides arranged opposite to each other and two second sides arranged opposite to each other, the number of the current weak point areas is four, the orthographic projection of the feeding point on the floor is located in any one of the four current weak point areas, and the radiator is adjacent to the current weak point area where the feeding point is arranged.

9. The electronic device according to claim 1, wherein: The antenna assembly comprises: An inductive device, one end of which is electrically connected to the feed source, and the other end of which is electrically connected to the feed point.

10. The electronic device according to claim 9, characterized in that: The inductive device comprises: N+1 inductors, the N+1 inductors are connected in series to form a series inductor, one end of the series inductor is electrically connected to the feed point, and the other end of the series inductor is electrically connected to the feed source, two adjacent inductors have adjacent connection points, and the N+1 inductors have N connection points; The antenna assembly further includes a switch unit, the switch unit having a common end and N ports, one end of the common end is electrically connected to the feed source, and the common end can be electrically connected to at least one of the N ports, the port is electrically connected to the connection point, and different ports are electrically connected to different connection points; When the common end is electrically connected to different ports, or the common end is electrically disconnected from the N ports, the inductance values ​​of the series inductors are different, so that the operating frequency bands in the first target frequency band supported by the antenna assembly are different.

11. The electronic device according to claim 10, characterized in that: The N ports include a first end and a second end; the N+1 inductors include: a first inductor, wherein one end of the first inductor is electrically connected to the feeding point, and the other end of the first inductor is electrically connected to the first end; a second inductor, one end of the second inductor being electrically connected to the other end of the first inductor, and the other end of the second inductor being electrically connected to the second end; and a third inductor, one end of the third inductor being electrically connected to the other end of the second inductor, and the other end of the third inductor being electrically connected to the feed source and the common end; When the common end is electrically connected to the first end, the antenna assembly supports a first frequency band in the first target frequency band; when the common end is electrically connected to the second end, the antenna assembly supports a second frequency band in the first target frequency band; when the common end is electrically disconnected from the first end and the common end is electrically disconnected from the second end, the antenna assembly supports a third frequency band in the first target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, and the frequency of the second frequency band is greater than the frequency of the third frequency band.

12. The electronic device according to claim 11, characterized in that: The first frequency band is the B8 frequency band, the second frequency band is the B20 frequency band, and the third frequency band is the B28 frequency band.

13. The electronic device according to claim 11, characterized in that: The switch unit further has a third terminal, and the inductive device further includes: a fourth inductor, one end of the fourth inductor being electrically connected to the third end, and the other end of the fourth inductor being grounded; When the common end is electrically connected to the second end and the common end is electrically connected to the third end, the antenna assembly supports a fourth frequency band, wherein a frequency of the fourth frequency band is at least partially different from a frequency of the second frequency band.

14. The electronic device according to claim 13, characterized in that: The fourth frequency band is the B5 frequency band.

15. The electronic device according to claim 11, characterized in that: The switch unit further has a fourth terminal, and the inductive device further includes: a fifth inductor, one end of the fifth inductor being electrically connected to the fourth end, and the other end of the fifth inductor being electrically connected to the ground; When the common end is electrically disconnected from the fourth end, and when the antenna assembly supports a corresponding frequency band in a first target frequency band, the antenna assembly supports a transmission frequency band of the corresponding frequency band, wherein the corresponding frequency band includes any one of the first frequency band, the second frequency band, and the third frequency band; When the common end is electrically connected to the fourth end, the antenna assembly supports a receiving frequency band of the corresponding frequency band in the first target frequency band.

16. The electronic device according to claim 11, characterized in that: The inductive device also includes: A sixth inductor, one end of the sixth inductor is electrically connected to a connection point between the feed source and the third inductor, and the other end of the sixth inductor is grounded.

17. The electronic device according to claim 9, characterized in that: The antenna assembly further includes a switch unit, the switch unit having a common end and N ports, one end of the common end is electrically connected to the feed source, and the common end can be electrically connected to at least one of the N ports; the inductive device includes: a first inductor, one end of which is electrically connected to the feed source, and the other end of which is electrically connected to the feed point; and N inductors, one end of each of the inductors is electrically connected to the feeding point, the other end of each of the inductors is electrically connected to the port, and different inductors are electrically connected to different ports; When the common end is electrically connected to different ports, or the common end is electrically disconnected from the N ports, the inductance value of the inductive device is different, so that the operating frequency bands in the first target frequency band supported by the antenna assembly are different.

18. The electronic device according to claim 17, characterized in that: The N ports include a first end, a second end, and a third end; the N inductors include: a second inductor, one end of the second inductor being electrically connected to the feeding point, and the other end of the second inductor being electrically connected to the first end; a third inductor, one end of the third inductor being electrically connected to the feeding point, and the other end of the third inductor being electrically connected to the second end; a fourth inductor, one end of the fourth inductor being electrically connected to the feeding point, and the other end of the fourth inductor being short-connected to the third end; When the common end is electrically connected to the third end, the antenna assembly supports a first frequency band in the first target frequency band; when the common end is electrically connected to the first end, the antenna assembly supports a second frequency band in the first target frequency band; when the common end is electrically disconnected from the first end, the common end is electrically disconnected from the second end, and the common end is electrically disconnected from the third end, the antenna assembly supports a third frequency band in the first target frequency band; when the common end is electrically connected to the second end, the antenna assembly supports a fourth frequency band in the first target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, the frequency of the second frequency band is greater than the frequency of the third frequency band, and the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band.

19. The electronic device according to claim 18, characterized in that: The first target frequency band is a low frequency band, the first frequency band is a B8 frequency band, the second frequency band is a B20 frequency band, the third frequency band is a B28 frequency band, and the fourth frequency band is a B5 frequency band.

20. The electronic device according to claim 18, characterized in that The switch unit further has a fourth terminal, and the inductive device further includes: a fifth inductor, one end of the fifth inductor being electrically connected to the fourth end, and the other end of the fifth inductor being electrically connected to the ground; When the common end is electrically disconnected from the fourth end, and when the antenna assembly supports a corresponding frequency band in a first target frequency band, the antenna assembly supports a transmission frequency band of the corresponding frequency band, wherein the corresponding frequency band includes any one of the first frequency band, the second frequency band, and the third frequency band; When the common end is electrically connected to the fourth end, the antenna assembly supports a receiving frequency band of the corresponding frequency band in the first target frequency band.

21. The electronic device according to claim 18, characterized in that The inductive device also includes: A sixth inductor, one end of the sixth inductor is electrically connected to the feed source, and the other end of the sixth inductor is grounded.

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