Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment. The antenna assembly comprises a first antenna. The first antenna comprises a first radiator, a first inductor, a first capacitor and a first feed source. The first radiator is provided with a first free end, a second free end, a first feeding point and a second feeding point, wherein the first feeding point and the second feeding point are arranged between the first free end and the second free end in a spaced mode. One end of the first inductor is electrically connected to the first feeding point; one end of the first capacitor is electrically connected to the second feeding point; the first feed source is electrically connected to the other end of the first inductor and the other end of the first capacitor so as to excite the first radiator to support a first target frequency band and a second target frequency band, and the frequency of the second target frequency band is larger than that of the first target frequency band.

Description

Technical Field

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

[0002] With the development of technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and their functions are becoming more and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, the communication performance of antenna components in 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 antenna assembly, the antenna assembly comprising a first antenna, the first antenna comprising:

[0004] A first radiator, the first radiator having a first free end and a second free end, and a first feeding point and a second feeding point spaced apart between the first free end and the second free end;

[0005] a first inductor, one end of which is electrically connected to the first feeding point;

[0006] a first capacitor, one end of which is electrically connected to the second feeding point; and

[0007] A first feed source, wherein the first feed source is electrically connected to the other end of the first inductor and the first feed source is electrically connected to the other end of the first capacitor to excite the first radiator to support a first target frequency band and 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.

[0008] In a second aspect, the present application provides an electronic device, comprising the antenna assembly as described in the first aspect.

[0009] In summary, in the first antenna of the antenna assembly provided in the embodiment of the present application, the first feed source electrically connects the first inductor to the first feeding point, and the first feed source electrically connects the first capacitor to the second feeding point, so as to achieve the result of feeding the excitation signal supporting the first target frequency band and the excitation signal supporting the second target frequency band separately, so as to excite the first radiator to support the first target frequency band and the second target frequency band. Therefore, the first antenna of the antenna assembly provided in the embodiment of the present application can support two frequency bands using one radiating branch (i.e., the first radiator), thereby expanding the bandwidth of the antenna assembly, so that the antenna assembly can not only communicate using the first target frequency band but also communicate using the second target frequency band, so that the antenna assembly has better antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0012] Figure 2 A schematic diagram of a first antenna for setting a first inductor to reduce the size of a first radiator;

[0013] Figure 3 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0014] Figure 4 For one embodiment Figure 3 A schematic diagram of a specific circuit structure of the antenna assembly shown;

[0015] Figure 5 is a schematic diagram of a specific circuit structure of an antenna assembly according to another embodiment;

[0016] Figure 6 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0017] Figure 7 For the general Figure 6 A schematic diagram showing the modeling of the first antenna in the antenna assembly into a simulation model;

[0018] Figure 8 for Figure 6 A schematic diagram of an S11 parameter curve of the first antenna of the antenna assembly shown in ;

[0019] Fig. 9 for Figure 6 A schematic diagram of system efficiency simulation results when the first antenna in the antenna assembly shown in supports the first target frequency band and the second target frequency band;

[0020] Fig.10 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B8 frequency band;

[0021] Fig.11 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B1 frequency band;

[0022] Fig.12 for Figure 6A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B3 frequency band;

[0023] Fig.13 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B40 frequency band;

[0024] Fig.14 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B41 frequency band;

[0025] Fig.15 for Figure 6 A schematic diagram of an S11 parameter curve of the first antenna of the antenna assembly shown in ;

[0026] Fig.16 for Fig.15 A schematic diagram of system efficiency simulation results when the first antenna in the antenna assembly shown in supports the first target frequency band and the second target frequency band;

[0027] Fig.17 for Figure 6 A schematic diagram of the dimensions of a first radiator and a second radiator of a first antenna in the antenna assembly shown in ;

[0028] Fig.18 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0029] Fig.19 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0030] Fig. 20 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0031] Fig.21 for Fig. 20 A schematic diagram showing the dimensions of the third radiator and the fourth radiator in the second antenna of the antenna assembly shown;

[0032] Fig. 22 A three-dimensional schematic diagram of an electronic device provided in one embodiment;

[0033] Fig.23 A schematic diagram of current distribution of a dipole antenna and an antenna assembly provided in an embodiment of the present application;

[0034] Fig.24 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;

[0035] Fig.25 for Fig.24 Schematic diagram of the weak current area and strong current area in the floor shown;

[0036] Fig.26 A schematic diagram of a current weak point area in an antenna assembly provided in one embodiment.

[0037] Description of main component numbers:

[0038] Electronic device 1, antenna assembly 10, device body 30, display screen 310, middle frame 320, housing 330, circuit board 50, floor 510, first side 511, second side 512, current weak point area 50a, current strong point area 50b;

[0039] First antenna 11, first radiator 111, first free end 1111, second free end 1112, first radiating portion 111a, second radiating portion 111b, first feeding point P1, second feeding point P2;

[0040] A first inductor L1, a first capacitor C1, a first feed source S1, a first switch circuit SW1, a second radiator 112, a third free end 1121, a first ground end 1122, and a first coupling gap 112a;

[0041] The second antenna 12, the third radiator 121, the fourth free end 1211, the fifth free end 1212, the third radiating portion 121a, the fourth radiating portion 121b, the third feeding point P3, and the fourth feeding point P4;

[0042] The second inductor L2, the second capacitor C2, the second feed source S2, the second switch circuit SW2, the fourth radiator 122, the sixth free end 1221, the second ground end 1222, and the second coupling slot 122a. DETAILED DESCRIPTION

[0043] 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.

[0044] 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.

[0045] 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.

[0046] See also Figure 1 , Figure 1 A schematic diagram of an antenna assembly provided for one embodiment of the present application. The antenna assembly 10 includes a first antenna 11, and the first antenna 11 includes a first radiator 111, a first inductor L1, a first capacitor C1, and a first feed source S1. The first radiator 111 has a first free end 1111 and a second free end 1112, and a first feed point P1 and a second feed point P2 spaced apart between the first free end 1111 and the second free end 1112. One end of the first inductor L1 is electrically connected to the first feed point P1. One end of the first capacitor C1 is electrically connected to the second feed point P2. The first feed source S1 is electrically connected to the other end of the first inductor L1 and the first feed source S1 is electrically connected to the other end of the first capacitor C1 to excite the first radiator 111 to support a first target frequency band and 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.

[0047] The first radiator 111 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 first radiator 111 may be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the first radiator 111 may be an antenna radiator designed using the middle frame formed of plastic and metal of the electronic device 1. In addition, the first radiator 111 may also be a metal frame antenna radiator designed using a metal middle frame.

[0048] It is understandable that the present application does not specifically limit the shape, structure and material of the first radiator 111. The shapes of the first radiator 111 include but are not limited to bent, straight, L-shaped, arc-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiator 111 is in a strip shape, the present application does not limit the extension track of the first radiator 111, so the first radiator 111 can be extended in a straight line, a curve, a multi-stage bend, etc. The first radiator 111 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0049] The first radiator 111 has two ends, both of which are not grounded. In other words, the first radiator 111 is open-circuited at both ends, so the two ends are respectively named as the first free end 1111 and the second free end 1112. The first feeding point P1 and the second feeding point P2 are both located between the first free end 1111 and the second free end 1112.

[0050] The first inductor L1 refers to a device that exhibits inductive characteristics within the first target frequency band supported by the first antenna 11, also called an inductive device, and the inductive device 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 first antenna 11. In the schematic diagram of this embodiment, the first inductor L1 includes a single inductor as an example for illustration, which should be understood to not limit the embodiments of the present application.

[0051] When the frequency band of the first target frequency band supported by the first antenna 11 is certain, compared with the first antenna 11 not including the first inductor L1, the first antenna 11 in the antenna assembly 10 provided in this embodiment includes the first inductor L1, which can reduce the size of the first radiator 111.

[0052] See also Figure 2 , Figure 2 A schematic diagram of a first antenna for setting a first inductor to reduce the size of a first radiator. Figure 2 (a) is a schematic diagram of the first antenna 11 without the first inductor L1; Figure 2 (b) is a schematic diagram of a first antenna 11 provided with a first inductor L1. The first antenna 11 includes a first inductor L1. One end of the first inductor L1 is electrically connected to the first feed source S1, and the other end of the first inductor L1 is electrically connected to the first feed point P1. Figure 2 visible, Figure 2In (b), the length of the first radiator 111 of the first antenna 11 including the first inductor L1 is relatively small.

[0053] It can be understood that in order to conveniently illustrate the influence of the first inductor L1 included in the first antenna 11 on the size of the first radiator 111, Figure 2 Only some components of the first antenna 11 are illustrated, while other components are omitted.

[0054] Please continue reading Figure 1 , one end of the first capacitor C1 is electrically connected to the second feeding point P2, and the first feed source S1 is electrically connected to the other end of the first capacitor C1, so the first feed source S1 is capacitively fed to the second feeding point P2. The first capacitor C1 can play a role in adjusting the resonance of the second target frequency band.

[0055] It should be noted that the first capacitor C1 may include at least one of the following: a single capacitor; a plurality of capacitors in series; a plurality of capacitors in parallel; a capacitor and an inductor in series; a capacitor and an inductor in parallel, as long as the capacitor characteristic is satisfied. In the schematic diagram of this embodiment, the first capacitor C1 includes a single capacitor as an example, which is understandable and should not be construed as a limitation on the embodiments of the present application.

[0056] In this embodiment, the first feed source S1 electrically connects the first inductor L1 to the first feeding point P1, and the first feed source S1 electrically connects the first capacitor C1 to the second feeding point P2, so as to achieve the result of feeding the excitation signal supporting the first target frequency band and the excitation signal supporting the second target frequency band separately. When the excitation signal supporting the first target frequency band is fed into the first radiator 111 via the first feeding point P1, the first radiator 111 is stimulated to support the first target frequency band. When the excitation signal supporting the second target frequency band is fed into the first radiator 111 via the second feeding point P2, the second radiator 112 is stimulated to support the second target frequency band.

[0057] In one embodiment, the first target frequency band is a low frequency band (Low Band), and the second target frequency band is a middle and high frequency band (Middle High Band, MHB). In this embodiment, the first feed source S1 electrically connects the first inductor L1 to the first feeding point P1, and the first feed source S1 electrically connects the first capacitor C1 to the second feeding point P2, so as to achieve the result of feeding the excitation signal supporting the low frequency band and the excitation signal supporting the high frequency band separately. When the excitation signal supporting the low frequency band is fed into the first radiator 111 via the first feeding point P1, the first radiator 111 is stimulated to support the low frequency band. When the excitation signal supporting the middle and high frequency band is fed into the first radiator 111 via the second feeding point P2, the first radiator 111 is stimulated to support the middle and high frequency band.

[0058] The first target frequency band includes a plurality of first frequency bands with different frequencies, and the second target frequency band includes a plurality of second frequency bands with different frequencies. It should be noted that the first radiator 111 supporting the first target frequency band may include the first radiator 111 supporting part of the first frequency bands or all of the first frequency bands in the plurality of first frequency bands in the first target frequency band. The first radiator 111 supporting the second target frequency band may include the first radiator 111 supporting part of the second frequency bands or all of the second frequency bands in the plurality of second frequency bands in the second target frequency band.

[0059] In summary, in the first antenna 11 of the antenna assembly 10 provided in the embodiment of the present application, the first feed source S1 electrically connects the first inductor L1 to the first feeding point P1, and the first feed source S1 electrically connects the first capacitor C1 to the second feeding point P2, so that the excitation signal supporting the first target frequency band and the excitation signal supporting the second target frequency band can be fed separately to stimulate the first radiator 111 to support the first target frequency band and the second target frequency band. Therefore, the first antenna 11 of the antenna assembly 10 provided in the embodiment of the present application can support two frequency bands using one radiation branch (i.e., the first radiator 111), thereby expanding the bandwidth of the antenna assembly 10, so that the antenna assembly 10 can not only communicate using the first target frequency band but also communicate using the second target frequency band, so that the antenna assembly 10 has better antenna performance.

[0060] For further information, see Figure 3 , Figure 3A schematic diagram of an antenna assembly provided for another embodiment of the present application. The antenna assembly 10 includes a first antenna 11, and the first antenna 11 includes a first radiator 111, a first inductor L1, a first capacitor C1, and a first feed source S1. The first radiator 111 has a first free end 1111 and a second free end 1112, and a first feed point P1 and a second feed point P2 spaced apart between the first free end 1111 and the second free end 1112. One end of the first inductor L1 is electrically connected to the first feed point P1. One end of the first capacitor C1 is electrically connected to the second feed point P2. The first feed source S1 is electrically connected to the other end of the first inductor L1 and the first feed source S1 is electrically connected to the other end of the first capacitor C1 to excite the first radiator 111 to support a first target frequency band and 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.

[0061] Please refer to the previous description for the first radiator 111 , the first capacitor C1 , the first inductor L1 , and the first feed source S1 , and will not be described in detail here.

[0062] Furthermore, in this embodiment, the first target frequency band includes a plurality of first frequency bands with different frequencies, and the second target frequency band includes a plurality of second frequency bands with different frequencies. The first antenna 11 of the antenna assembly 10 also includes a first switching circuit SW1. The first feed source S1 is electrically connected to the other end of the first inductor L1 through the first switching circuit SW1, and the first feed source S1 is electrically connected to the other end of the first capacitor C1 through the first switching circuit SW1, and the first switching circuit SW1 is used to adjust the first frequency band in the first target frequency band supported by the first radiator 111, and adjust the second frequency band of the second target frequency band supported by the first radiator 111.

[0063] The first feed source S1 is electrically connected to the other end of the first inductor L1 through the first switching circuit SW1, and the first feed source S1 is electrically connected to the other end of the first capacitor C1 through the first switching circuit SW1, and the first switching circuit SW1 is used to adjust the first frequency band in the first target frequency band supported by the first radiator 111, and adjust the second frequency band in the second target frequency band supported by the first radiator 111. It can be seen that through the action of the first switching circuit SW1, the first frequency band in the first target frequency band supported by the first radiator 111 can be adjusted and the second frequency band in the second target frequency band can be adjusted, so that the first antenna 11 in the antenna assembly 10 can support more frequency bands. Further, through the action of the first switching circuit SW1, the first frequency band in the first target frequency band supported by the first radiator 111 can be adjusted and the second frequency band in the second target frequency band can be adjusted, so that the first antenna 11 in the antenna assembly 10 can cover all the first frequency bands in the first target frequency band, and cover all the second frequency bands in the second target frequency band. For example, when the first target frequency band is a low frequency band and the second target frequency band is a medium and high frequency band, the first frequency band in the low frequency band supported by the first radiator 111 and the second frequency band in the medium and high frequency band can be adjusted through the action of the first switching circuit SW1, so that the first antenna 11 in the antenna assembly 10 can cover all the first frequency bands in the low frequency band and cover all the second frequency bands in the medium and high frequency band. In addition, the first switching circuit SW1 can also be used to enable the first antenna 11 of the antenna assembly 10 to meet the first frequency band required by the first target frequency band under different communication requirements and the second frequency band required by the second target frequency band under different communication requirements. For example, in scenario A, the first frequency band a in the first target frequency band is required, and the second frequency band a' in the second target frequency band is required; while in scenario B, the first frequency band b in the first target frequency band is required, and the second frequency band b' in the second target frequency band is required. Therefore, the first switching circuit SW1 can be used to adjust the first frequency band in the first target frequency band and the second frequency band in the second target frequency band supported by the first radiator 111. For example, in scenario A, through the action of the first switching circuit, the first radiator 111 supports the first frequency band a in the first target frequency band and supports the second frequency band a' in the second target frequency band.When switching from scene A to scene B, the function of the first switching switch circuit SW1 (for example, the first switching switch may be under the control of a control signal generated by a controller) is to switch the first frequency band a in the first target frequency band supported by the first radiator 111 to the first frequency band b, and to switch the second frequency band a' in the second target frequency band supported by the first radiator 111 to the second frequency band b'. When switching from scene B to scene A, the function of the first switching switch circuit SW1 (for example, the first switching switch circuit SW1 may be under the control of a control signal generated by a controller) is to switch the first frequency band b in the first target frequency band supported by the first radiator 111 to the first frequency band a, and to switch the second frequency band b' in the second target frequency band supported by the first radiator 111 to the second frequency band a'.

[0064] See also Figure 4 , Figure 4 For one embodiment Figure 3 The specific circuit structure diagram of the antenna assembly shown. In this embodiment, the first switching switch circuit SW1 includes a common terminal 1130, a first terminal 1131 and a second terminal 1132. The common terminal 1130 is electrically connected to the first feed source S1, the first terminal 1131 is electrically connected to the first inductor L1 to the first feeding point P1, and the second terminal 1132 is electrically connected to the first capacitor C1 to the second feeding point P2. The common terminal 1130 can be electrically connected or disconnected from the first terminal 1131; accordingly, the common terminal 1130 can be electrically connected or disconnected from the second terminal 1132. It should be noted that the electrical connection relationship between the common terminal 1130 and the first terminal 1131 and the electrical connection relationship between the common terminal 1130 and the second terminal 1132 are independent of each other, and whether the common terminal 1130 is electrically connected to the first terminal 1131 will not affect whether the common terminal 1130 is electrically connected to the second terminal 1132. For example, when the common terminal 1130 is electrically connected to the first terminal 1131, the common terminal 1130 may also be electrically connected to or disconnected from the second terminal 1132; correspondingly, when the common terminal 1130 is electrically disconnected from the first terminal 1131, the common terminal 1130 may also be electrically connected to or disconnected from the second terminal 1132. In this embodiment, the first switching switch circuit SW1 is illustrated as a single-pole double-throw switch (SP2T), which is understandable and should not be construed as limiting the embodiments of the present application.

[0065] When the common terminal 1130 is electrically connected to different ports (the first terminal 1131 and the second terminal 1132) according to different preset switch parameters (which can be regarded as different control signals), different matching devices (i.e., the first capacitor C1 and the first inductor L1) can be electrically connected to each feeding point (the first feeding point P1 and the second feeding point P2), so that different matching devices can be electrically connected to the first radiator 111, thereby adjusting the electrical length of the first radiator 111, and thus adjusting the first frequency band in the first target frequency band supported by the first radiator 111, and adjusting the second frequency band in the first target frequency band supported by the first radiator 111. Specifically, when the common terminal 1130 is electrically connected to the first terminal 1131, the first inductor L1 can be electrically connected to the first feeding point P1; when the common terminal 1130 is electrically connected to the second terminal 1132, the first capacitor C1 can be electrically connected to the second feeding point P2.

[0066] In other embodiments, the first switch circuit SW1 may be, but is not limited to, a single-pole N-throw switch (SPNT) or an N-pole N-throw switch (NSPST). For example, the first switch circuit SW1 may be, but is not limited to, a single-pole four-throw switch (SP4T) or a four-pole four-throw switch (4SPST).

[0067] See also Figure 5 , Figure 5 Schematic diagram of the specific circuit structure of the antenna assembly of another embodiment. In this embodiment, the first switching switch circuit SW1 includes a common terminal 1130, a first terminal 1131 and a second terminal 1132. The common terminal 1130 is electrically connected to the first feed source S1, the first terminal 1131 is electrically connected to the first inductor L1 to the first feeding point P1, and the second terminal 1132 is electrically connected to the first capacitor C1 to the second feeding point P2. The common terminal 1130 can be electrically connected or disconnected from the first terminal 1131; accordingly, the common terminal 1130 can be electrically connected or disconnected from the second terminal 1132. It should be noted that the electrical connection relationship between the common terminal 1130 and the first terminal 1131 and the electrical connection relationship between the common terminal 1130 and the second terminal 1132 are independent of each other, and whether the common terminal 1130 is electrically connected to the first terminal 1131 will not affect whether the common terminal 1130 is electrically connected to the second terminal 1132. For example, when the common end 1130 is electrically connected to the first end 1131, the common end 1130 may also be electrically connected to or disconnected from the second end 1132; correspondingly, when the common end 1130 is electrically disconnected from the first end 1131, the common end 1130 may also be electrically connected to or disconnected from the second end 1132.

[0068] In addition, in this embodiment, the first antenna 11 further includes a second inductor L2 and a second capacitor C2. Accordingly, the first switching circuit SW1 further includes a third terminal 1133 and a fourth terminal 1134. The third terminal 1133 electrically connects the second inductor L2 to the first feeding point P1, and the fourth terminal 1134 electrically connects the second capacitor C2 to the second feeding point P2.

[0069] The common terminal 1130 can be electrically connected to or disconnected from the third terminal 1133; correspondingly, the common terminal 1130 can be electrically connected to or disconnected from the fourth terminal 1134. It should be noted that the electrical connection relationship between the common terminal 1130 and the first terminal 1131, the electrical connection relationship between the common terminal 1130 and the second terminal 1132, the electrical connection relationship between the common terminal 1130 and the third terminal 1133, and the electrical connection relationship between the common terminal 1130 and the fourth terminal 1134 are all independent of each other. For example, whether the common terminal 1130 is electrically connected to the third terminal 1133 will not affect whether the common terminal 1130 is electrically connected to the fourth terminal 1134, whether the common terminal 1130 is electrically connected to the first terminal 1131, and whether the common terminal 1130 is electrically connected to the second terminal 1132. For example, when the common terminal 1130 is electrically connected to the third terminal 1133, the common terminal 1130 may also be electrically connected to or disconnected from the fourth terminal 1134, the common terminal 1130 may also be electrically connected to or disconnected from the first terminal 1131, and the common terminal 1130 may also be electrically connected to or disconnected from the second terminal 1132; accordingly, when the common terminal 1130 is electrically disconnected from the third terminal 1133, the common terminal 1130 may also be electrically connected to or disconnected from the fourth terminal 1134, the common terminal 1130 may also be electrically connected to or disconnected from the first terminal 1131, and the common terminal 1130 may also be electrically connected to or disconnected from the second terminal 1132. In the present embodiment, the first switching switch circuit SW1 is illustrated as a single-pole four-throw switch (SP4T) as an example, which is understandable and should not be understood as a limitation on the embodiments of the present application.

[0070] When the common end 1130 is electrically connected to different ports (the first end 1131, the second end 1132, the third end 1133 and the fourth end 1134) according to different preset switching parameters (which can be regarded as different control signals), different matching devices (i.e., the first capacitor C1, the first inductor L1, the first capacitor C1 and the second capacitor C2) can be electrically connected to each feeding point (the first feeding point P1 and the second feeding point P2), so that different matching devices can be electrically connected to the first radiator 111, thereby adjusting the electrical length of the first radiator 111. Therefore, the first frequency band in the first target frequency band supported by the first radiator 111 can be adjusted, and the second frequency band in the first target frequency band supported by the first radiator 111 can be adjusted. Specifically, when the common terminal 1130 is electrically connected to the first terminal 1131, the first inductor L1 can be electrically connected to the first feeding point P1; when the common terminal 1130 is electrically connected to the second terminal 1132, the first capacitor C1 can be electrically connected to the second feeding point P2; when the common terminal 1130 is electrically connected to the third terminal 1133, the second inductor L2 can be electrically connected to the first feeding point P1; when the common terminal 1130 is electrically connected to the second terminal 1132, the second capacitor C2 can be electrically connected to the second feeding point P2.

[0071] In this embodiment, the first switching switch circuit SW1 and the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 constitute a four-way switch circuit (or matching circuit or matching branch). That is, the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2 each constitute a switch circuit.

[0072] As can be seen from the above description, the first antenna 11 of the antenna assembly 10 includes four switch circuits, which are the switch circuit where the first inductor L1 is located, the switch circuit where the second inductor L2 is located, the switch circuit where the first capacitor C1 is located, or the switch circuit where the second capacitor C2 is located. Each switch circuit has two states, which are electrically connected to the corresponding feeding point and electrically disconnected from the corresponding feeding point. Therefore, the four-way switch circuit has multiple states when combined. For example, the first inductor L1 is electrically connected to the first feeding point P1 in one state, and the first inductor L1 is disconnected from the first feeding point P1 in another state. Correspondingly, the second inductor L2 is electrically connected to the first feeding point P1 in one state, and the second inductor L2 is disconnected from the first feeding point P1 in another state. Correspondingly, the first capacitor C1 is electrically connected to the second feeding point P2 in one state, and the first capacitor C1 is disconnected from the second feeding point P2 in another state. Correspondingly, the second capacitor C2 is electrically connected to the second feeding point P2 in one state, and the second capacitor C2 is disconnected from the second feeding point P2 in another state. When the four-way switch circuit is in state A and when the four-way switch circuit is in state B, the state of at least one of the four-way switch circuits in state A is different from the state of the four-way switch circuit in state B.

[0073] When the first target frequency band is a low frequency band and the second target frequency band is a medium and high frequency band, when the environment in which the first antenna 11 in the antenna assembly 10 is located in the electronic device 1 is relatively good, full coverage of the entire low frequency band and the medium and high frequency band can be achieved through one state. Normally, the first antenna 11 in the antenna assembly 10 can achieve full coverage of the entire low frequency band and the medium and high frequency band by switching between two states or three states of a four-way switch circuit. In another case, full coverage of the entire low frequency band and the medium and high frequency band can be better achieved by switching between four states.

[0074] It can be understood that the first switch switching circuit SW1 includes a first end 1131, a second end 1132, a third end 1133 and a fourth end 1134, and the first antenna 11 also includes a first capacitor C1, a second capacitor C2, a first inductor L1 and a first inductor L2. When the first switch switching circuit SW1 includes a first end 1131, a second end 1132, and the first antenna 11 includes a first capacitor C1 and a first inductor L1, there are two switch circuits. Correspondingly, it is also satisfied that when the first target frequency band is a low frequency band and the second target frequency band is a medium and high frequency band, when the environment in which the first antenna 11 in the antenna assembly 10 is located in the electronic device 1 is relatively good, the entire low frequency band and the medium and high frequency band can be fully covered by one state. Generally, the first antenna 11 in the antenna assembly 10 can achieve full coverage of the entire low frequency band and the medium and high frequency band by switching between two states or three states of the four-way switch circuit. In another case, the full coverage of the entire low-frequency band and the medium- and high-frequency bands can be better achieved by switching between four states.

[0075] For further information, see Figure 6 , Figure 6 A schematic diagram of an antenna assembly provided for another embodiment of the present application. The antenna assembly 10 includes a first antenna 11, and the first antenna 11 includes a first radiator 111, a first inductor L1, a first capacitor C1, and a first feed source S1. The first radiator 111 has a first free end 1111 and a second free end 1112, and a first feed point P1 and a second feed point P2 spaced apart between the first free end 1111 and the second free end 1112. One end of the first inductor L1 is electrically connected to the first feed point P1. One end of the first capacitor C1 is electrically connected to the second feed point P2. The first feed source S1 is electrically connected to the other end of the first inductor L1 and the first feed source S1 is electrically connected to the other end of the first capacitor C1 to excite the first radiator 111 to support a first target frequency band and 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.

[0076] Please refer to the previous description for the first radiator 111 , the first capacitor C1 , the first inductor L1 , and the first feed source S1 , and will not be described in detail here.

[0077] Furthermore, in this embodiment, the first antenna 11 further includes a first switching circuit SW1. For details of the first switching circuit SW1, please refer to the above description, which will not be repeated here.

[0078] Further, in this embodiment, the first antenna 11 further includes a second radiator 112. The second radiator 112 has a third free end 1121 and a first ground end 1122. The third free end 1121 is spaced apart from the second free end 1112 and has a first coupling slot 112a. The second radiator 112 is coupled to the first radiator 111 through the first coupling slot 112a, the first ground end 1122 is grounded, and the second radiator 112 and the first radiator 111 jointly support the second target frequency band.

[0079] The second radiator 112 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the second radiator 112 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the second radiator 112 can be an antenna radiator designed using the middle frame formed by the plastic and metal of the electronic device 1. In addition, the second radiator 112 can also be a metal frame antenna radiator designed with a metal middle frame.

[0080] It is understandable that the present application does not specifically limit the shape, structure and material of the second radiator 112. The shapes of the second radiator 112 include but are not limited to bent, straight, L-shaped, arc-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the second radiator 112 is in a strip shape, the present application does not limit the extension trajectory of the second radiator 112, so the second radiator 112 can extend in a straight line, a curve, a multi-stage bend, etc. The second radiator 112 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area. The type of the second radiator 112 can be the same as or different from the type of the first radiator 111, which is not limited in the present application.

[0081] The third free end 1121 is spaced apart from the second free end 1112 and has a first coupling gap 112a, so the second radiator 112 is capacitively coupled with the first radiator 111 through the first coupling gap 112a. The so-called "capacitive coupling" means that an electric field is generated between the second radiator 112 and the first radiator 111, and the signal of the second radiator 112 can be transmitted to the first radiator 111 through the electric field, and the signal of the first radiator 111 can be transmitted to the second radiator 112 through the electric field, so that the first radiator 111 and the second radiator 112 can achieve electrical signal conduction and transmission even when they are not in direct contact or direct connection.

[0082] It should be noted that the second radiator 112 being able to support the second target frequency band includes that the second radiator 112 is able to support at least a portion of the second frequency band in the second target frequency band.

[0083] In this embodiment, the first antenna 11 further includes a second radiator 112, which is capacitively coupled to the first radiator 111. The second radiator 112 can also support the second target frequency band, so that the first antenna 11 has better communication performance in the second target frequency band.

[0084] Further, the first switching switch circuit SW1 supports at least one of the plurality of first frequency bands according to a preset switching parameter. When the first radiator 111 is used to support different first frequency bands, the switching parameters of the first switching switch circuit SW1 are different. When the switching parameters of the first switching switch circuit SW1 are different, the electrical connection relationship between the common terminal 1130 and each port is different, thereby making the electrical length of the first radiator 111 different, so that the frequency bands supported by the first radiator 111 are different. Among them, when the first switching switch circuit SW1 includes a first terminal 1131 and a second terminal 1132, the port includes the first terminal 1131 and the second terminal 1132; when the first switching switch circuit SW1 includes a first terminal 1131, a second terminal 1132, a third terminal 1133 and a fourth terminal 1134, the port includes the first terminal 1131, the second terminal 1132, the third terminal 1133 and the fourth terminal 1134.

[0085] As can be seen from the previous introduction, through the action of the first switching circuit SW1, the first frequency band in the first target frequency band supported by the first radiator 111 can be adjusted, and the second frequency band in the second target frequency band can be adjusted, so that the first antenna 11 in the antenna assembly 10 can support more frequency bands.

[0086] For example, when the first radiator 111 supports the first frequency band c in the first target frequency band, the switch parameter of the first switch is the switch parameter c; when the first radiator 111 supports the first frequency band d in the first target frequency band, the switch parameter of the first switch is the switch parameter d; it can be seen that by adjusting the first switching switch circuit SW1, the switch parameter changes, thereby changing the first frequency band of the first target frequency band supported by the first radiator 111. Through the action of the first switching switch circuit SW1, the first radiator 111 can support different first frequency bands in the first target frequency band, thereby enabling the first antenna 11 to have better antenna performance in the first target frequency band.

[0087] The first switching switch circuit SW1 supports at least one of the multiple second frequency bands according to the preset switching parameters. When the second frequency bands jointly supported by the first radiator 111 and the second radiator 112 are different, the switching parameters of the first switching switch circuit SW1 are different; and the second frequency band jointly supported by the first radiator 111 and the second radiator 112 is adjusted as the first frequency band supported by the first radiator 111 is adjusted.

[0088] As can be seen from the previous introduction, through the action of the first switching switch circuit SW1, the electrical length of the first radiator 111 can be adjusted, thereby adjusting the first frequency band in the first target frequency band supported by the first radiator 111 and adjusting the second frequency band in the second target frequency band, so that the first antenna 11 in the antenna assembly 10 can support more frequency bands.

[0089] For example, when the first radiator 111 supports the second frequency band c' in the second target frequency band, the switch parameter of the first switching switch circuit SW1 is the switch parameter c0; when the first radiator 111 supports the second frequency band d' in the second target frequency band, the switch parameter of the second switching switch circuit SW1 is the switch parameter d0; it can be seen that by adjusting the first switching switch circuit SW1, the switch parameter changes, thereby changing the first frequency band of the second target frequency band supported by the first radiator 111. Through the action of the first switching switch circuit SW1, the first radiator 111 can support different second frequency bands in the first target frequency band, thereby enabling the first antenna 11 to have better antenna performance in the second target frequency band.

[0090] In addition, due to the function of the first switching circuit SW1, the electrical length of the first radiator 111 can be adjusted, and therefore, the sum of the electrical length of the first radiator 111 and the electrical length of the second radiator 112 can be adjusted. The second frequency band supported by the first radiator 111 and the second radiator 112 is adjusted along with the adjustment of the first frequency band supported by the first radiator 111. It can be seen that the first switching circuit SW1 can adjust the first frequency band and the second frequency band at the same time, so that the adjustment of the first frequency band and the second frequency band is more convenient.

[0091] For example, when the first radiator 111 supports the first frequency band c in the first target frequency band and the second frequency band c' in the second target frequency band, the switch parameter of the first switch is the switch parameter c0; when the first radiator 111 supports the first frequency band d in the second target frequency band and the second frequency band d' in the second target frequency band, the switch parameter of the second switch is the switch parameter d0; it can be seen that by adjusting the first switching switch circuit SW1, the switch parameter changes, thereby changing the first frequency band of the first target frequency band and the second frequency band of the second target frequency band supported by the first radiator 111. Therefore, the first switching switch circuit SW1 can adjust the first frequency band and the second frequency band at the same time, so that the adjustment of the first frequency band and the second frequency band is more convenient.

[0092] See also Figure 7 , Figure 8 and Fig. 9 , Figure 7 For the general Figure 6 A schematic diagram showing the modeling of the first antenna in the antenna assembly into a simulation model; Figure 8 for Figure 6 A schematic diagram of an S11 parameter curve of the first antenna of the antenna assembly shown in ; Fig. 9 for Figure 6Schematic diagram of system efficiency simulation results when the first antenna in the antenna assembly shown in supports the first target frequency band and the second target frequency band. The first target frequency band is a low frequency band, and the second target frequency band is a medium and high frequency band. When the first target frequency band is a low frequency band and the second target frequency band is a medium and high frequency band, the first antenna 11 supports the first target frequency band and the second target frequency band, that is, the first antenna 11 supports both the low frequency band and the medium and high frequency band, so that the first antenna 11 can cover more frequency bands and has a better communication effect. Specifically, in one embodiment, when the first target frequency band is a low frequency band and the second target frequency band is a medium and high frequency band, the multiple first frequency bands include B5 band, B8 band, and B28 band; the second target frequency band is a medium and high frequency band, and the multiple second frequency bands include B40 band, B3 band, B1 band and B41 band. The following describes in detail how the first switching circuit SW1 adjusts the first frequency band of the first target frequency band supported by the first antenna 11 and the second frequency band of the second target frequency band.

[0093] When the first switch circuit SW1 has the first switch parameter, the first radiator 111 supports the B5 frequency band in the low frequency band, and the first radiator 111 and the second radiator 112 jointly support the B40 frequency band in the medium and high frequency band.

[0094] When the first switch circuit SW1 has the second switch parameter, the first radiator 111 supports the B8 frequency band in the low frequency band, and the first radiator 111 and the second radiator 112 jointly support the B3 frequency band in the middle and high frequency band.

[0095] When the first switch circuit SW1 has a third switch parameter, the first radiator 111 supports the B28 band in the low frequency band, and the first radiator 111 and the second radiator 112 support the B1 band and the B41 band in the mid-high frequency band.

[0096] exist Figure 8In the figure, the horizontal axis is frequency (Frequency), the unit is GHz, and the vertical axis is S parameters (S-Parameters), the unit is dB. Among them, curve ① is the S11 curve when the first switching switch circuit SW1 has the first switching parameter. Curve ② is the S11 curve when the first switching switch circuit SW1 has the second switching parameter. Curve ③ is the S11 curve when the first switching switch circuit SW1 has the third switching parameter. It can be seen from the simulation schematic that by switching the first switch switching circuit, the first antenna 11 in the antenna assembly 10 can achieve full frequency band coverage of the first target frequency band (low frequency band in this simulation diagram) and the second target frequency band (medium and high frequency band in this simulation diagram), so that the first antenna 11 in the antenna assembly 10 has good communication performance in the first target frequency band and the second target frequency band.

[0097] See also Fig. 9 ,exist Fig. 9 In the figure, the horizontal axis is the frequency in GHz, and the vertical axis is the system efficiency in dB. Fig. 9 In the simulation, the first antenna 11 of the antenna assembly 10 supports the B5 frequency band, the B8 frequency band and the B28 frequency band in the first target frequency band. Fig. 9 The middle curve ① is the system efficiency curve of the B5 frequency band. The so-called system efficiency is also called the total system efficiency. Curve ② is the system efficiency curve of the B8 frequency band. Curve ③ is the system efficiency curve of the B28 frequency band. It can be seen from this simulation diagram that the first antenna 11 of the antenna assembly 10 has good system efficiency when supporting the B5 frequency band, the B8 frequency band, and the B28 frequency band.

[0098] Please also read Figures 10 to 14 , Fig.10 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B8 frequency band; Fig.11 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B1 frequency band; Fig.12 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B3 frequency band; Fig.13 for Figure 6 A schematic diagram of current distribution when the first antenna of the antenna assembly shown supports the B40 frequency band; Fig.14 for Figure 6 The current distribution diagram of the first antenna of the antenna assembly shown supports the B41 frequency band. Figures 10 to 14It can be seen that, since the feed source is electrically connected to the first feed point P1 through the first inductor L1, and the feed source is electrically connected to the second feed point P2 through the first capacitor C1 (it can also be called the branching effect through the first inductor L1 and the first capacitor C1), the first radiator 111 can support the low frequency band and the medium frequency band at the same time, and the parasitic mode through the coupling of the second radiator 112 and the first radiator 111 (that is, the second radiator 112 is a parasitic branch of the first radiator 111) covers the high frequency. In addition, Figures 10 to 14 It can also be seen that when the frequency of the frequency band supported by the first antenna 11 is higher, the current on the second radiator 112 is more, that is, the second radiator 112 can support a frequency band with a higher frequency.

[0099] Depend on Figure 8 It can be seen from the simulation results in that the first antenna 11 of the antenna assembly 10 provided in the embodiment of the present application can cover the N78 frequency band of 5G in addition to covering the low frequency band and the medium and high frequency band. By adjusting the size of the first radiator 111 and the second radiator 112 during design, as well as the matching form of the first switching switch in the first antenna 11, the resonance of the N78 frequency band can be adjusted, while the performance of the low frequency band and the medium and high frequency band remains unchanged. After the antenna assembly 10 is manufactured, the lengths of the first radiator 111 and the second radiator 112 are not adjustable. Therefore, the first radiator 111 has a preset size (which can be named as the first size) and the second radiator 112 has a preset size (which can be named as the second size), and the first switching switch has a preset switching parameter and a matching parameter corresponding to the preset switching parameter, so that the first antenna 11 of the antenna assembly 10 can cover the N78 frequency band of 5G in addition to covering the low frequency band and the medium and high frequency band.

[0100] The first antenna 11 is used to support the low frequency band of Long Term Evolution (LTE) and the medium and high frequency band of LTE according to the preset switching parameters of the first switching switch circuit SW1, and is also used to support the new radio (NR) band of the fifth generation communication technology (5G).

[0101] The first antenna 11 is used to support the low frequency band of LTE and the medium and high frequency band of LTE according to the preset switching parameters of the first switching switch circuit SW1, and is also used to support the 5G NR band, further broadening the frequency band supported by the first antenna 11, so that the first antenna 11 has better communication performance.

[0102] The 5G NR frequency band includes the N78 frequency band.

[0103] See also Fig.15and Fig.16 , Fig.15 for Figure 6 A schematic diagram of an S11 parameter curve of the first antenna of the antenna assembly shown in ; Fig.16 for Fig.15 Schematic diagram of system efficiency simulation results when the first antenna in the antenna assembly shown in FIG. supports the first target frequency band and the second target frequency band. It should be noted that although Fig.15 and Figure 8 All are based on Figure 6 The S11 curve obtained by simulating the architecture of the antenna assembly 10 shown in FIG. Fig.15 The S11 curve of the first antenna 11 shown in FIG. Figure 8 The switch parameters of the first switch switching circuit of the first antenna 11 in S11 of the first antenna 11 shown in FIG. 1 are different. In other words, Fig.15 The first switch switching circuit of the first antenna 11 of the antenna assembly 10 based on the simulation is compared with Figure 8 The first switching circuit SW1 of the first antenna 11 of the antenna assembly 10 is adjusted based on the simulation.

[0104] exist Fig.15 In the figure, the horizontal axis is frequency (Frequency), the unit is GHz, and the vertical axis is S parameters (S-Parameters), the unit is dB. Among them, curve ① is the S11 curve when the first antenna 11 supports the B5 band, the B1 band and the N78 band. Curve ② is the S11 curve when the first antenna 11 supports the B8 band, the B40 band and the B41 band. Curve ③ is the S11 curve when the first antenna 11 supports the B28 band and the B3 band. It can be seen from the simulation schematic that by switching the first switch switching circuit, the first antenna 11 in the antenna assembly 10 can achieve full band coverage of the first target frequency band (the low frequency band in this simulation diagram) and the second target frequency band (the medium and high frequency band in this simulation diagram) as well as coverage of the N78 band of 5G NR.

[0105] See also Fig.16 ,exist Fig.16 In the figure, the horizontal axis is the frequency in GHz, and the vertical axis is the system efficiency in dB. Fig.16 In which, curve ① is the system efficiency curve when the first antenna 11 supports the B5 band, the B1 band and the N78 band. Curve ② is the system efficiency curve when the first antenna 11 supports the B8 band, the B40 band and the B41 band. Curve ③ is the system efficiency curve when the first antenna 11 supports the B28 band and the B3 band. It can be seen from this simulation figure that the first antenna 11 in the antenna assembly 10 has good communication performance in the first target frequency band, the second target frequency band and the N78 frequency band of 5G NR.

[0106] It is understandable that in this embodiment, the first antenna 11 supports the low frequency band of LTE and the medium and high frequency band of LTE, and is also used to support the N78 band in the 5G NR band. It is understandable that in other embodiments, the first antenna 11 can also support other frequency bands of 5G NR, such as the N77 band or the N79 band.

[0107] It can be understood that in the antenna assembly 10 described in the above embodiments, the first target frequency band is a low frequency band and the second target frequency band is a medium and high frequency band. In other embodiments, the first target frequency band includes the GPS L1 band, and the second target frequency band includes the GPS L5 band, or the WiFi 2.4G band or the WiFi 5G band.

[0108] Please also read Figure 6 and Fig.17 , Fig.17 for Figure 6 Schematic diagram of the dimensions of the first radiator and the second radiator of the first antenna in the antenna assembly shown in . The first target frequency band is a low frequency band, and the second target frequency band is a medium and high frequency band. The first radiator 111 includes a first radiating portion 111a and a second radiating portion 111b that are connected by bending. The first radiating portion 111a has the first free end 1111 and the first feeding point P1. The second radiating portion 111b has the second free end 1112 and the second feeding point P2. Among them, the length d1 of the first radiating portion 111a satisfies: d1≤20mm, and the length d2 of the second radiating portion 111b and the length d3 of the second radiator 112 satisfy: d2+d3≤20mm.

[0109] As can be seen from the foregoing description, the first antenna 11 in the antenna assembly 10 provided in the embodiment of the present application can reduce the size of the first radiator 111 by setting the first inductor L1 compared to not setting the first inductor L1. In this embodiment, since d1≤20mm, d2+d3≤20mm, the sum of the length of the first radiator 111 and the length of the second radiator 112 is d1+d2+d3≤40mm. It can be seen that the lengths of the first radiator 111 and the second radiator 112 in the first antenna 11 are much smaller than the lengths of the radiators supporting the first target frequency band and the second target frequency band in the related art. When the first target frequency band is a low frequency band (LB) and the second target frequency band is a medium and high frequency band (MHB), the lengths of the first radiator 111 and the second radiator 112 in the first antenna 11 are much smaller than the lengths of the radiators supporting LB and MHB in the related art.

[0110] Furthermore, the electrical length of the first radiator 111 is satisfy: Wherein, λ1 is the wavelength of the electromagnetic wave signal in the first target frequency band.

[0111] 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 first radiator 111 is determined by the first target frequency band.

[0112] The first radiator 111 is in an open-circuit state at both ends, and the length of the first radiator 111 refers to the length of the extension path between the first free end 1111 and the second free end 1112. Considering the need for miniaturization of the first radiator 111, the electrical length of the first radiator 111 is Select less than or equal to At the same time, considering that the physical length of the first inductor L1 replacing the first radiator 111 is too large, more energy loss will be introduced. Therefore, the electrical length of the first radiator 111 is selected as In summary, the electrical length of the first radiator 111 provided in the embodiment of the present application is satisfy: On the one hand, the size of the first radiator 111 can be made smaller, and on the other hand, the first antenna 11 of the antenna assembly 10 can have smaller energy loss when supporting the first target frequency band.

[0113] It should be noted that the electrical length of the first radiator 111 satisfies the following formula:

[0114] Wherein, L is the physical length of the first radiator 111. In the present embodiment, the physical length of the first radiator 111 is equal to the sum of the length of the first radiating portion 111a and the length of the second radiating portion 111b, that is, equal to d1+d2. a is the transmission time of the electromagnetic wave signal of the first target frequency band in the medium outside the first radiator 111. When the first radiator 111 is an MDA radiator, that is, the outside of the first radiator 111 is wrapped by a plastic medium, then the medium is plastic. It can be understood that the plastic wrapped outside the first radiator 111 is an example and should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. b is the transmission time of the electromagnetic wave signal of the first target frequency band in free space.

[0115] See also Fig.18 , Fig.18A schematic diagram of an antenna assembly provided for another embodiment of the present application. In this embodiment, in addition to the first antenna 11, the antenna assembly 10 also includes a second antenna 12. It should be noted that the antenna assembly 10 also includes a second antenna 12 which can be combined with the antenna assembly 10 including the first antenna 11 provided in any of the previous embodiments. In the schematic diagram of this embodiment, the antenna assembly 10 also includes a second antenna 12 combined with the antenna assembly 10 including the first antenna 11 shown in the previous embodiment is used as an example for illustration. It can be understood that it should not be understood as a limitation on the embodiment of the present application. The second antenna 12 includes a third radiator 121, a second inductor L2, a second capacitor C2 and a second feed source S2. The third radiator 121 has a fourth free end 1211 and a fifth free end 1212, and a third feeding point P3 and a fourth feeding point P4 located between the fourth free end 1211 and the fifth free end 1212. One end of the second inductor L2 is electrically connected to the third feeding point P3. One end of the second capacitor C2 is electrically connected to the fourth feeding point P4. The second feed source S2 is electrically connected to the other end of the second inductor L2 and the second feed source S2 is electrically connected to the other end of the second capacitor C2 to excite the third radiator 121 to support the first target frequency band and the second target frequency band.

[0116] The third radiator 121 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the third radiator 121 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the third radiator 121 can be an antenna radiator designed using the middle frame formed by plastic and metal of the electronic device 1. In addition, the third radiator 121 can also be a metal frame antenna radiator designed with a metal middle frame.

[0117] It is understandable that the present application does not specifically limit the shape, structure and material of the third radiator 121. The shapes of the third radiator 121 include but are not limited to bent, straight, L-shaped, arc-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the third radiator 121 is in a strip shape, the present application does not limit the extension track of the third radiator 121, so the third radiator 121 can be extended in a straight line, a curve, a multi-segment bend, etc. The third radiator 121 can be a line with uniform width on the extension track, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0118] The third radiator 121 has two ends, both of which are not grounded. In other words, the third radiator 121 is open-circuited at both ends, so the two ends are respectively named as the third free end 1121 and the fourth free end 1211. The third feeding point P3 and the fourth feeding point P4 are both located between the third free end 1121 and the fourth free end 1211.

[0119] The second inductor L2 refers to a device that exhibits inductive characteristics within the first target frequency band supported by the second antenna 12, also called an inductive device, and the inductive device 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 exhibits inductive characteristics within the first target frequency band supported by the second antenna 12. In the schematic diagram of this embodiment, the second inductor L2 includes a single inductor as an example for illustration, which is understandable and should not constitute a limitation on the embodiments of the present application.

[0120] When the frequency band of the first target frequency band supported by the second antenna 12 is certain, compared with the second antenna 12 not including the second inductor L2, the second antenna 12 in the antenna assembly 10 provided in this embodiment includes the second inductor L2, which can reduce the size of the third radiator 121.

[0121] It should be noted that the second capacitor C2 may include at least one of the following: a single capacitor; a plurality of capacitors in series; a plurality of capacitors in parallel; a capacitor and an inductor in series; a capacitor and an inductor in parallel, as long as the capacitor characteristic is satisfied. In the schematic diagram of this embodiment, the second capacitor C2 includes a single capacitor as an example, which is understandable and should not be construed as a limitation on the embodiments of the present application.

[0122] In this embodiment, the second feed source S2 electrically connects the second inductor L2 to the third feeding point P3, and the second feed source S2 electrically connects the second capacitor C2 to the third feeding point P3, so as to achieve the result of feeding the excitation signal supporting the first target frequency band and the excitation signal supporting the second target frequency band separately. When the excitation signal supporting the first target frequency band is fed into the third radiator 121 via the third feeding point P3, the third radiator 121 is stimulated to support the first target frequency band. When the excitation signal supporting the second target frequency band is fed into the third radiator 121 via the second feeding point P2, the third radiator 121 is stimulated to support the second target frequency band.

[0123] The first target frequency band includes a plurality of first frequency bands with different frequencies, and the second target frequency band includes a plurality of second frequency bands with different frequencies. It should be noted that the third radiator 121 supporting the first target frequency band may include the third radiator 121 supporting part of the first frequency bands or all of the first frequency bands in the plurality of first frequency bands in the first target frequency band. The third radiator 121 supporting the second target frequency band may include the third radiator 121 supporting part of the second frequency bands or all of the second frequency bands in the plurality of second frequency bands in the second target frequency band.

[0124] In summary, in the second antenna 12 of the antenna assembly 10 provided in the embodiment of the present application, the second feed source S2 electrically connects the second inductor L2 to the third feeding point P3, and the second feed source S2 electrically connects the second capacitor C2 to the fourth feeding point P4, so that the excitation signal supporting the first target frequency band and the excitation signal supporting the second target frequency band can be fed separately to stimulate the third radiator 121 to support the first target frequency band and the second target frequency band. Therefore, the second antenna 12 of the antenna assembly 10 provided in the embodiment of the present application can support two frequency bands using one radiation branch (i.e., the third radiator 121), thereby expanding the bandwidth of the antenna assembly 10, so that the antenna assembly 10 can not only communicate using the first target frequency band but also communicate using the second target frequency band, so that the antenna assembly 10 has better antenna performance.

[0125] In addition, the antenna assembly 10 provided in the embodiment of the present application includes a first antenna 11 and a second antenna 12. When the first antenna 11 supports the first target frequency band and the second antenna 12 supports the first target frequency band, the first frequency band of the first target frequency band supported by the first antenna 11 may be the same as the first frequency band of the second target frequency band supported by the second antenna 12, or may be different, which is not limited in this embodiment. When the first frequency band of the first target frequency band supported by the first antenna 11 is the same as the first frequency band of the first target frequency band supported by the second antenna 12, the antenna assembly 10 has better communication performance in the same first frequency band. When the first frequency band of the first target frequency band supported by the first antenna 11 is different from the first frequency band of the first target frequency band supported by the second antenna 12, the first antenna 11 can support different first frequency bands in the first target frequency band, so that communication can be achieved in different first frequency bands.

[0126] See also Fig.19 , Fig.19 A schematic diagram of an antenna assembly provided for another embodiment of the present application. The first target frequency band includes multiple first frequency bands with different frequencies, and the second target frequency band includes multiple second frequency bands with different frequencies. The antenna assembly 10 also includes a second switching switch circuit SW2. The second feed source S2 is electrically connected to the other end of the second inductor L2 through the second switching switch circuit SW2, and the second feed source S2 is electrically connected to the other end of the second capacitor C2 through the second switching switch circuit SW2, and the second switching switch circuit SW2 is used to adjust the first frequency band in the first target frequency band supported by the third radiator 121, and adjust the second frequency band of the second target frequency band supported by the third radiator 121.

[0127] The second feed source S2 is electrically connected to the other end of the second inductor L2 through the second switching circuit SW2, and the second feed source S2 is electrically connected to the other end of the second capacitor C2 through the second switching circuit SW2, and the second switching circuit SW2 is used to adjust the first frequency band in the first target frequency band supported by the third radiator 121, and adjust the second frequency band in the second target frequency band supported by the third radiator 121. It can be seen that through the action of the second switching circuit SW2, the first frequency band in the first target frequency band supported by the third radiator 121 and the second frequency band in the second target frequency band can be adjusted, so that the second antenna 12 in the antenna assembly 10 can support more frequency bands.

[0128] The function of the second switching circuit SW2 is the same as that of the first switching circuit SW1. Please refer to the above description of the first switching circuit SW1 for details, which will not be repeated here.

[0129] See also Fig. 20 , Fig. 20 A schematic diagram of an antenna assembly provided for another embodiment of the present application. In addition to the first antenna 11, the antenna assembly 10 also includes a second antenna 12. It should be noted that the antenna assembly 10 also includes a second antenna 12 which can be combined with the antenna assembly 10 including the first antenna 11 provided in any of the previous embodiments. In the schematic diagram of this embodiment, the antenna assembly 10 also includes a second antenna 12 combined with the antenna assembly 10 including the first antenna 11 shown in the previous embodiment as an example for illustration, which can be understood that it should not be understood as a limitation on the embodiment of the present application. The second antenna 12 includes a third radiator 121, a second inductor L2, a second capacitor C2 and a second feed source S2. The third radiator 121, the second inductor L2, the second capacitor C2 and the second feed source S2 are described above and will not be repeated here. In addition, in this embodiment, the second antenna 12 also includes a fourth radiator 122. The fourth radiator 122 has a sixth free end 1221 and a second ground end 1222. The sixth free end 1221 is spaced apart from the fifth free end 1212 and has a second coupling slot 122a. The fourth radiator 122 is coupled to the third radiator 121 through the second coupling slot 122a. The second grounding end 1222 is grounded. The fourth radiator 122 and the third radiator 121 jointly support the second target frequency band.

[0130] The fourth radiator 122 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the fourth radiator 122 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the fourth radiator 122 can be an antenna radiator designed using the middle frame formed by plastic and metal of the electronic device 1. In addition, the fourth radiator 122 can also be a metal frame antenna radiator designed with a metal middle frame.

[0131] It is understandable that the present application does not specifically limit the shape, structure and material of the fourth radiator 122. The shapes of the fourth radiator 122 include but are not limited to bent, straight, L-shaped, arc-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the fourth radiator 122 is in a strip shape, the present application does not limit the extension trajectory of the fourth radiator 122, so the fourth radiator 122 can extend in a straight line, a curve, a multi-stage bend, etc. The fourth radiator 122 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area. The type of the fourth radiator 122 can be the same as or different from the type of the first radiator 111, which is not limited in the present application.

[0132] The sixth free end 1221 is spaced apart from the fifth free end 1212 and has a second coupling gap 122a, so the fourth radiator 122 is capacitively coupled with the third radiator 121 through the second coupling gap 122a. The so-called "capacitive coupling" means that an electric field is generated between the fourth radiator 122 and the third radiator 121, and the signal of the fourth radiator 122 can be transmitted to the third radiator 121 through the electric field, and the signal of the third radiator 121 can be transmitted to the fourth radiator 122 through the electric field, so that the third radiator 121 and the fourth radiator 122 can achieve electrical signal conduction and transmission even in a state of not directly contacting or directly connecting.

[0133] Furthermore, the second switching circuit SW2 supports at least one of the plurality of first frequency bands according to preset switching parameters. When the first frequency bands supported by the third radiator 121 are different, the switching parameters of the second switching circuit SW2 are different.

[0134] As can be seen from the previous introduction, through the action of the second switching switch circuit SW2, the first frequency band in the first target frequency band supported by the third radiator 121 can be adjusted, and the second frequency band in the second target frequency band can be adjusted, so that the second antenna 12 in the antenna assembly 10 can support more frequency bands.

[0135] The second switching switch circuit SW2 supports at least one of the multiple second frequency bands according to the preset switching parameters. When the second frequency bands jointly supported by the third radiator 121 and the fourth radiator 122 are different, the switching parameters of the second switching switch circuit SW2 are different; and the second frequency band jointly supported by the third radiator 121 and the fourth radiator 122 is adjusted as the first frequency band supported by the third radiator 121 is adjusted.

[0136] The second frequency band commonly supported by the third radiator 121 and the fourth radiator 122 is adjusted along with the adjustment of the first frequency band supported by the third radiator 121. Therefore, it can be seen that the second switching switch circuit SW2 can adjust the first frequency band and the second frequency band at the same time, thereby making the adjustment of the first frequency band and the second frequency band more convenient.

[0137] The second antenna 12 is used to support the low frequency band of LTE and the medium and high frequency band of LTE according to the preset switching parameters of the second switching switch circuit SW2, and is also used to support the 5G NR band.

[0138] The second antenna 12 is used to support the low frequency band of LTE and the medium and high frequency band of LTE according to the preset switching parameters of the second switching switch circuit SW2, and is also used to support the 5G NR band, further broadening the frequency band supported by the second antenna 12, so that the second antenna 12 has better communication performance.

[0139] It is understandable that in this embodiment, the second antenna 12 supports the low frequency band of LTE and the medium and high frequency band of LTE, and is also used to support the N78 band in the 5G NR band. It is understandable that in other embodiments, the second antenna 12 can also support other frequency bands of 5G NR, such as the N77 band or the N79 band.

[0140] Please also read Fig. 20 , Fig.21 , Fig.21 for Fig. 20 The schematic diagram of the dimensions of the third radiator and the fourth radiator in the second antenna of the antenna assembly shown. The first target frequency band is a low frequency band, and the second target frequency band is a medium and high frequency band; the third radiator 121 includes a third radiating portion 121a and a fourth radiating portion 121b connected by bending, the third radiating portion 121a has the fourth free end 1211 and the third feeding point P3, and the fourth radiating portion 121b has the fifth free end 1212 and the fourth feeding point P4, wherein the length d4 of the third radiating portion 121a satisfies: d4≤20mm, and the length d5 ​​of the fourth radiating portion 121b and the length d6 of the fourth radiator 122 satisfy: d5+d6≤20mm.

[0141] As can be seen from the foregoing description, the second antenna 12 in the antenna assembly 10 provided in the embodiment of the present application can reduce the size of the third radiator 121 by setting the second inductor L2 compared to not setting the second inductor L2. In this embodiment, since d4≤20mm, d5+d6≤20mm, the sum of the length of the third radiator 121 and the length of the fourth radiator 122 is d4+d5+d6≤40mm. It can be seen that the length of the third radiator 121 and the fourth radiator 122 in the second antenna 12 is much smaller than the length of the radiator supporting the first target frequency band and the second target frequency band in the related art. When the first target frequency band is the low frequency band (LB) and the second target frequency band is the medium and high frequency band (MHB), the length of the third radiator 121 and the fourth radiator 122 in the second antenna 12 is much smaller than the length of the radiator supporting LB and MHB in the related art.

[0142] Furthermore, the electrical length of the third radiator 121 is satisfy: Wherein, λ1 is the wavelength of the electromagnetic wave signal in the first target frequency band.

[0143] In this implementation, 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 third radiator 121 is determined by the first target frequency band.

[0144] The third radiator 121 is in an open-circuit state at both ends, and the length of the third radiator 121 refers to the length of the extension path between the fourth free end 1211 and the fifth free end 1212. Considering the need for miniaturization of the third radiator 121, the electrical length of the third radiator 121 is Select less than or equal to At the same time, considering that the physical length of the second inductor L2 replacing the third radiator 121 is too large, it will introduce more energy loss. Therefore, the electrical length of the third radiator 121 is selected as In summary, the electrical length of the third radiator 121 provided in the embodiment of the present application is satisfy: On the one hand, the size of the third radiator 121 can be made smaller, and on the other hand, the second antenna 12 of the antenna assembly 10 can have smaller energy loss when supporting the first target frequency band.

[0145] It should be noted that the electrical length of the third radiator 121 satisfies the following formula:

[0146] Wherein, L3 is the physical length of the third radiator 121. In this embodiment, the physical length of the third radiator 121 is equal to the sum of the length of the third radiating portion 121a and the length of the fourth radiating portion 121b, that is, equal to d4+d5. a is the transmission time of the electromagnetic wave signal of the first target frequency band in the third radiator 121, and b is the transmission time of the electromagnetic wave signal of the first target frequency band in free space.

[0147] In one embodiment, the length of the third radiator 121 is the same as the length of the first radiator 111. In another embodiment, the length of the third radiator 121 is different from the length of the first radiator 111, which is not limited in the present application.

[0148] In one embodiment, the first antenna 11 is a main antenna, and the second antenna 12 is a diversity antenna.

[0149] The so-called primary antenna refers to an antenna that can both transmit and receive electromagnetic wave signals. The so-called diversity antenna refers to an antenna that can only receive electromagnetic wave signals but cannot transmit electromagnetic wave signals. The first antenna 11 is a primary antenna (PRX), and the second antenna 12 is a diversity antenna (DRX). Therefore, the first antenna 11 and the second antenna 12 are matched with each other to realize the transceiver function of the antenna assembly 10.

[0150] In addition, an embodiment of the present application further provides an electronic device 1. The electronic device 1 includes an antenna assembly 10 as provided in any of the previous embodiments. The electronic device 1 includes but is not limited to mobile phones, telephones, televisions, tablet computers (Pads), cameras, personal computers, laptop computers (Personal Computers, PCs), 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 an example of a mobile phone, 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.

[0151] Please refer to Fig. 22 , Fig. 22A 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 shell 330 that are covered and connected to each other. In addition, the device body 30 also includes a middle frame 320. The display screen 310 and the shell 330 cooperate to form a receiving space. The first feed source S1 and the second feed source S2 of the antenna assembly 10 can be arranged on a circuit board 50 inside the shell 330 of the electronic device 1, and the first radiator 111 can be formed on the edge of the middle frame 320.

[0152] The first radiator 111 may be located at any one of the four corners of the electronic device 1, for example, at the upper right corner, lower right corner, upper left corner, or lower left corner when viewed from the back (when the battery cover faces the user). The corner positions shown in the schematic diagram in this embodiment should not be understood as limiting the electronic device 1 provided in the embodiment of the present application.

[0153] 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.

[0154] Furthermore, the electronic device 1 further comprises a floor 510, which is adjacent to the first radiator 111 and spaced apart from the first radiator 111. The floor 510 has a current weak point area 50a, and the orthographic projection of the first feeding point P1 on the floor 510 is located in the current weak point area 50a.

[0155] The floor 510 may be, but is not limited to, a metal layer (such as a copper layer) in the circuit board 50. The large metal layer in the circuit board 50 usually constitutes the floor 510, also known as the ground electrode. It is understandable that the circuit board 50 also includes multiple insulating layers and multiple wiring layers. The floor 510 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 510 are arranged with an insulating layer between them. Different wiring layers can be electrically connected through wires or metal through holes. It is understandable that the introduction of the floor 510 here is only one case of the circuit board 50, and should not be understood as a limitation on the floor 510 provided in the embodiment of the present application. In other embodiments, the floor 510 may also be the main body of the middle frame 320, or, in other embodiments, the floor 510 may also be a shielding member of the display screen 310 in the electronic device 1.

[0156] In this embodiment, the floor 510 is adjacent to the first radiator 111 and is spaced apart from the first radiator 111. The floor 510 and the first radiator 111 together constitute a dipole antenna. The floor 510 is a radiating arm of the dipole antenna, named as the first radiating arm, and the first radiator 111 is another radiating arm of the dipole antenna, named as the second radiating arm. When the antenna assembly 10 is working, both the floor 510 and the first radiator 111 participate in the work.

[0157] In one embodiment, the floor 510 includes a first side 511 and a second side 512 connected by a bend, wherein the length of the first side 511 is greater than the length of the second side 512. In one embodiment, the shape of the floor 510 may be a rectangle or a shape similar to a rectangle, wherein the first side 511 is the long side of the floor 510, and the second side 512 is the short side of the floor 510.

[0158] Please also read Fig.23 , Fig.23 A schematic diagram of current distribution of a dipole antenna and an antenna assembly provided in an embodiment of the present application. Fig.23 (a) is a schematic diagram of current distribution of a dipole antenna; Fig.23 (b) is a schematic diagram of current distribution after a radiating arm in a dipole antenna is widened; Fig.23 (c) is a schematic diagram of current distribution after a radiating arm in a dipole antenna is widened; Fig.23 (d) is a schematic diagram of the current distribution of the antenna assembly 10 provided in the embodiment of the present application. Fig.23It can be seen that from (a) to (d), one radiating arm of the dipole antenna gradually widens. It can be seen that the floor 510 in the antenna assembly 10 of the present application can be equivalent to one radiating arm of the dipole antenna. Specifically, the floor 510 in the antenna assembly 10 can be regarded as an antenna element with a certain width in the dipole antenna, so that the floor 510 of the circuit board 50 and the first radiator 111 are like a dipole antenna with a biased feeding point.

[0159] 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 510 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 510 in the antenna assembly 10 provided in the embodiment of the present application is an effective radiator. 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 510, that is, for the antenna assembly 10 whose first target frequency band is a low-frequency band, the longitudinal current of the floor 510 can be fully stimulated, which can effectively improve the radiation efficiency of the antenna assembly 10.

[0160] In summary, in the implementation manner of the present application, the floor 510 can be regarded as a radiating arm (antenna vibrator) with a certain width, so that the floor 510 and the first radiator 111 are a dipole antenna with the same feed point offset. The lower the first target frequency band supported by the dipole antenna, the more significant the current effect of the floor 510, 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 510 along the first side 511 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 may also be other frequency bands. The implementation manner of the present application does not limit the first target frequency band.

[0161] The working principle of the first antenna 11 of the antenna assembly 10 provided in the embodiment of the present application is described and explained below.

[0162] Please also read Fig.24 and Fig.25 , Fig.24 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; Fig.25 for Fig.24 Schematic diagram of the weak and strong current areas in the floor.

[0163] It can be understood that in other embodiments, the orthographic projection of the first feeding point P1 on the floor 510 may not be located in the current weak point area 50 a , but may be located outside the current weak point area 50 a of the floor 510 .

[0164] In this embodiment, the floor 510 can be the ground in the circuit board 50. For example, the circuit board 50 is a main board. The characteristic mode is an inherent mode that characterizes the floor 510. By analyzing the characteristic mode of the floor (also called the characteristic mode), the most suitable feeding position can be found according to the boundary conditions. The following is an example in which the first target frequency band supported by the first antenna 11 is a low-frequency band. The characteristic current with the largest proportion of the longitudinal current mode can be obtained through simulation. The current distribution of the characteristic mode is mainly characterized by the sinusoidal behavior of the edge of the floor 510, which is represented by Fig.24 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 510, can also be considered. The difference between the phase of the electric field distribution in the floor 510 and the phase of the current distribution is 90°. That is, the minimum value of the electric field distribution in the floor 510 is the same as the maximum value of the current distribution in the floor 510; conversely, the maximum value of the electric field distribution in the floor 510 is the same as the minimum value of the current distribution in the floor 510. Fig.24 In the figure, the curve J next to the floor 510 is used to represent the current distribution of the floor 510, and the curve V is used to represent the voltage distribution of the floor 510. Curve J indicates that the current distribution of the floor 510 is a sine distribution. It can be seen from curve J that the two ends of the floor 510 are where the current is the smallest, and the middle position of the floor 510 is where the current is the strongest. Curve V indicates that the electric field distribution of the floor 510 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 510 (that is, the minimum electric field distribution of the floor 510) to excite the characteristic mode; or, a capacitive coupling element (CCE) can be placed at the minimum characteristic mode current distribution of the circuit board 50 (that is, the maximum electric field distribution of the circuit board 50) to excite the characteristic mode. Please refer to Fig.25 ,exist Fig.25In the figure, the current weak point area 50a of the characteristic mode current distribution of the floor 510, and the current strong point area 50b of the characteristic mode current distribution of the floor 510. 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 first antenna 11 is to obtain a higher radiation efficiency, it is necessary to better excite the longitudinal current distribution of the floor 510. It should be noted that, when using CCE feeding, in addition to setting the first feeding point P1 at the minimum point of the characteristic mode current of the floor 510, other positions other than the minimum point of the characteristic mode current in the current weak point area 50a of the characteristic mode of the floor 510 can also be used. The so-called current weak point area 50a of the characteristic mode current of the floor 510 refers to the area including the minimum value of the characteristic mode current of the floor 510, and the current weak point area 50a provided in the embodiment of the present application will be quantified later. The so-called current strong point area 50b of the characteristic mode current of the floor 510 refers to the area including the maximum value of the characteristic mode of the floor 510.

[0165] In this embodiment, the first radiator 111 is spaced apart from the floor 510 , so the first radiator 111 excited by the first feed source S1 serves as a radiation driving device, constituting a CCE.

[0166] In the embodiment of the present application, the number of the current weak point areas 50a of the floor 510 is four. The orthographic projection of the first feeding point P1 on the floor 510 can be located in any one of the four current weak point areas 50a of the characteristic mode current of the floor 510. Accordingly, the first radiator 111 is arranged adjacent to the current weak point area 50a where the orthographic projection of the first feeding point P1 on the floor 510 is located.

[0167] For the first antenna 11 provided in the embodiment of the present application, when the orthographic projection of the first feeding point P1 on the floor 510 is still located in the current weak point area 50a of the floor 510, the floor 510 constitutes the main radiation branch of the first target frequency band, contributing most of the radiation of the first antenna 11, and the first radiator 111 is equivalent to acting as a radiation driving device for the entire first antenna 11, becoming the excitation condition for the floor 510 to work in the first target frequency band, and the energy of the first radiator 111 accounts for a very small proportion. Therefore, in this case, reducing the size of the first radiator 111 has little effect on the overall radiation performance of the first antenna 11.

[0168] In summary, in the first antenna 11 provided in the embodiment of the present application, the first radiator 111 is spaced apart from the floor 510, and the orthographic projection of the first feeding point P1 on the floor 510 is located in the current weak point area 50a of the characteristic mode current of the floor 510, which can well excite the excitation current in the same extension direction along the first side 511, so that the first antenna 11 has a higher radiation efficiency in the first target frequency band. It can be seen that the communication performance of the first antenna 11 provided in the embodiment of the present application is good. In addition, in the first antenna 11 provided in the embodiment of the present application, the floor 510 constitutes the main radiation branch of the first target frequency band, contributing most of the radiation of the first antenna 11, and the first radiator 111 is equivalent to acting as a radiation driving device for the entire first antenna 11, which becomes the excitation condition for the floor 510 to work in the first target frequency band, and the energy of the first radiator 111 accounts for a very small proportion. Therefore, in this case, reducing the size of the first radiator 111 has little effect on the overall radiation performance of the first antenna 11.

[0169] See also Fig.26 , Fig.26 A schematic diagram of a current weak point area in an antenna assembly provided in one embodiment. The current weak point area 50a is located in an area with a center O being the intersection of an extension line of the first side 511 and an extension line of the second side 512 and a radius R being 1 / 16 of the wavelength of the first target frequency band.

[0170] In the schematic diagram of this embodiment, the connection between the first side 511 and the second side 512 is an arc shape. The center O is the intersection of the extension line of the first side 511 and the extension line of the second side 512, and the center O is located outside the first side 511 and the second side 512. When the connection between the first side 511 and the second side 512 is a right angle, the intersection of the extension line of the first side 511 and the extension line of the second side 512 is located on the first side 511 and on the second side 512.

[0171] The orthographic projection of the first feeding point P1 on the floor 510 is located in the current weak point area 50a, and is located in a circular area with the intersection as the center O 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 50a where the orthographic projection of the first feeding point P1 on the floor 510 is located is fan-shaped or fan-like.

[0172] When the current weak point area 50a is selected as an area with the intersection of the extension line of the first side 511 and the extension line of the second side 512 as the center O and a radius of 1 / 16 of the wavelength of the first target frequency band, the current in the area is relatively weak. The orthographic projection of the first feeding point P1 on the floor 510 is set in the current weak point area 50a, which can further better excite the excitation current in the same extension direction of the first side 511, so that the antenna assembly 10 has a higher radiation efficiency in the first target frequency band.

[0173] Please read further Fig.25 The floor 510 includes two first sides 511 disposed opposite to each other, and two second sides 512 disposed opposite to each other, the number of the current weak point areas 50a is four, the positive projection of the first feeding point P1 on the floor 510 is located in any one of the four current weak point areas 50a, and the first radiator 111 is adjacent to the current weak point area 50a where the first feeding point P1 is disposed.

[0174] In this embodiment, the number of the current weak area 50a is four, and the orthographic projection of the first feeding point P1 on the floor 510 can be located in any one of the four current weak area 50a, which makes the setting of the first feeding point P1 more flexible. The first feeding point P1 of the first radiator 111 is set in the current weak area 50a where the orthographic projection on the floor 510 is located. For the convenience of description, the current weak areas 50a are named as current weak area 50a(1), current weak area 50a(2), current weak area 50a(3) and current weak area 50a(4). In this embodiment, the orthographic projection of the first feeding point P1 on the floor 510 is located in the current weak area 50a(1) as an example for illustration. Accordingly, the first radiator 111 is set adjacent to the current weak area 50a(1).

[0175] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An antenna assembly, characterized in that: The antenna assembly includes a first antenna, the first antenna including: A first radiator, the first radiator having a first free end and a second free end, and a first feeding point and a second feeding point spaced apart between the first free end and the second free end; a first inductor, one end of which is electrically connected to the first feeding point; a first capacitor, one end of which is electrically connected to the second feeding point; and A first feed source, wherein the first feed source is electrically connected to the other end of the first inductor and the first feed source is electrically connected to the other end of the first capacitor to excite the first radiator to support a first target frequency band and 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.

2. The antenna assembly according to claim 1, wherein: The first target frequency band includes a plurality of first frequency bands with different frequencies, and the second target frequency band includes a plurality of second frequency bands with different frequencies; the first antenna of the antenna assembly further includes: A first switching switch circuit, the first feed source is electrically connected to the other end of the first inductor through the first switching switch circuit, and the first feed source is electrically connected to the other end of the first capacitor through the first switching switch circuit, the first switching switch circuit is used to adjust a first frequency band in a first target frequency band supported by the first radiator, and adjust a second frequency band in a second target frequency band supported by the first radiator.

3. The antenna assembly according to claim 2, wherein: The first antenna also includes: A second radiator, wherein the second radiator has a third free end and a first ground end, the third free end is spaced apart from the second free end and has a first coupling gap, the second radiator is coupled to the first radiator through the first coupling gap, the first ground end is grounded, and the second radiator and the first radiator jointly support the second target frequency band.

4. The antenna assembly as described in claim 3, wherein the first switching switch circuit supports at least one of the multiple first frequency bands according to preset switching parameters, and when the first radiator is used to support different first frequency bands, the switching parameters of the first switching switch circuit are different.

5. The antenna assembly according to claim 4, characterized in that The first switching switch circuit supports at least one of the multiple second frequency bands according to the preset switching parameters. When the second frequency bands supported by the first radiator and the second radiator are different, the switching parameters of the first switching switch circuit are different; and the second frequency band supported by the first radiator and the second radiator is adjusted as the first frequency band supported by the first radiator is adjusted.

6. The antenna assembly according to claim 5, characterized in that The first target frequency band is a low frequency band; the second target frequency band is a medium and high frequency band.

7. The antenna assembly according to claim 6, wherein: The plurality of first frequency bands include a B5 frequency band, a B8 frequency band, and a B28 frequency band; the plurality of second frequency bands include a B40 frequency band, a B3 frequency band, a B1 frequency band, and a B41 frequency band; When the first switching circuit has a first switching parameter, the first radiator supports the B5 frequency band in the low frequency band, and the first radiator and the second radiator jointly support the B40 frequency band in the medium and high frequency band; When the first switching circuit has a second switch parameter, the first radiator supports the B8 frequency band in the low frequency band, and the first radiator and the second radiator jointly support the B3 frequency band in the medium and high frequency band; When the first switching circuit has a third switching parameter, the first radiator supports the B28 frequency band in the low frequency band, and the first radiator and the second radiator support the B1 frequency band and the B41 frequency band in the mid-high frequency band.

8. The antenna assembly according to claim 5, wherein: The first antenna is used to support the low frequency band of LTE and the medium and high frequency band of LTE according to the preset switching parameters of the first switching switch circuit, and is also used to support the 5GNR band.

9. The antenna assembly according to claim 8, wherein: The 5G NR frequency band includes the N78 frequency band.

10. The antenna assembly according to claim 1, wherein: The first target frequency band is a low frequency band, and the second target frequency band is a medium and high frequency band; the first radiator includes a first radiating portion and a second radiating portion that are connected by a bending, the first radiating portion has the first free end and the first feeding point, and the second radiating portion has the second free end and the second feeding point, wherein the length d1 of the first radiating portion satisfies: d1≤20mm, and the length d2 of the second radiating portion and the length d3 of the second radiator satisfy: d2+d3≤20mm.

11. The antenna assembly according to claim 1, wherein: The first target frequency band includes a GPS L1 frequency band, and the second target frequency band includes a GPS L5 frequency band, or a WiFi 2.4G frequency band, or a WiFi 5G frequency band.

12. The antenna assembly according to claim 1, wherein: The electrical length of the first radiator satisfy: Wherein, λ1 is the wavelength of the electromagnetic wave signal in the first target frequency band.

13. The antenna assembly according to any one of claims 1 to 12, characterized in that: The antenna assembly further includes a second antenna, the second antenna including: A third radiator, the third radiator having a fourth free end and a fifth free end, and a third feeding point and a fourth feeding point located between the fourth free end and the fifth free end; a second inductor, one end of the second inductor being electrically connected to the third feeding point; a second capacitor, one end of which is electrically connected to the fourth feeding point; and A second feed source is electrically connected to the other end of the second inductor and the second feed source is electrically connected to the other end of the second capacitor to excite the third radiator to support the first target frequency band and the second target frequency band.

14. The antenna assembly according to claim 13, wherein: The first target frequency band includes a plurality of first frequency bands with different frequencies, and the second target frequency band includes a plurality of second frequency bands with different frequencies; the antenna assembly further includes: A second switching switch circuit, the second feed source is electrically connected to the other end of the second inductor through the second switching switch circuit, and the second feed source is electrically connected to the other end of the second capacitor through the second switching switch circuit, and the second switching switch circuit is used to adjust the first frequency band in the first target frequency band supported by the third radiator, and adjust the second frequency band of the second target frequency band supported by the third radiator.

15. The antenna assembly according to claim 14, wherein: The second antenna further includes: A fourth radiator, the fourth radiator having a sixth free end and a second ground end, the sixth free end is spaced apart from the fifth free end and has a second coupling gap, the fourth radiator is coupled to the third radiator through the second coupling gap, the second ground end is grounded, and the fourth radiator and the third radiator jointly support the second target frequency band.

16. The antenna assembly as described in claim 15, wherein the second switching switch circuit supports at least one of the multiple first frequency bands according to preset switching parameters, and when the first frequency band supported by the third radiator is different, the switching parameters of the second switching switch circuit are different.

17. The antenna assembly according to claim 16, wherein: The second switching switch circuit supports at least one of the multiple second frequency bands according to the preset switching parameters. When the second frequency bands jointly supported by the third radiator and the fourth radiator are different, the switching parameters of the second switching switch circuit are different; and the second frequency band jointly supported by the third radiator and the fourth radiator is adjusted as the first frequency band supported by the third radiator is adjusted.

18. The antenna assembly according to claim 17, wherein: The second antenna is used to support the low frequency band of LTE and the medium and high frequency band of LTE according to the preset switching parameters of the second switching switch circuit, and is also used to support the 5GNR band.

19. The antenna assembly according to claim 13, wherein: The first target frequency band is a low frequency band, and the second target frequency band is a medium and high frequency band; the third radiator includes a third radiating portion and a fourth radiating portion that are connected by a bend, the third radiating portion has the fourth free end and the third feeding point, and the fourth radiating portion has the fifth free end and the fourth feeding point, wherein the length d4 of the third radiating portion satisfies: d4≤20mm, and the length d5 ​​of the fourth radiating portion and the length d6 of the fourth radiator satisfy: d5+d6≤20mm.

20. The antenna assembly according to claim 13, wherein: The first antenna is a main antenna, and the second antenna is a diversity antenna.

21. An electronic device, characterized in that: The electronic device comprises the antenna assembly as described in any one of claims 1-20.

22. The electronic device according to claim 21, characterized in that The electronic device further includes a floor, the floor is adjacent to the first radiator and spaced apart from the first radiator, the floor has a current weak area, and the orthographic projection of the first feeding point on the floor is located in the current weak area.

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