Electronic device

Abstract

The invention provides an electronic device. The electronic equipment comprises a floor and an antenna assembly, wherein the floor comprises a first edge and a second edge which are connected in a bending manner; the antenna assembly comprises a radiator, a first feed source and a second feed source. The radiator comprises a first radiation arm and a second radiation arm which are connected in a bending manner, the first radiation arm is arranged adjacent to the first side, the second radiation arm is arranged adjacent to the second side, the first radiation arm is provided with a first open circuit end, the second radiation arm is provided with a second open circuit end, and the first open circuit end is provided with a first open circuit end. The radiator is also provided with a first feeding point and a second feeding point; the first feed source is capacitively and electrically connected to the first feeding point so as to excite the radiator to support a first target frequency band; the second feed source is electrically connected to the second feed point so as to excite the radiator to support a second target frequency band, and the second feed point is located in a current strong point area where the radiator supports the first target frequency band.

Description

Technical Field

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

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

[0003] In a first aspect, the present application provides an electronic device, the electronic device comprising a floor and an antenna assembly, the floor comprising a first side and a second side that are bent and connected;

[0004] The antenna assembly comprises:

[0005] A radiator, the radiator comprising a first radiating arm and a second radiating arm connected in a bent manner, the first radiating arm being arranged adjacent to the first side, the second radiating arm being arranged adjacent to the second side, the first radiating arm having a first open-circuit end, the second radiating arm having a second open-circuit end, and the radiator further having a first feeding point and a second feeding point;

[0006] a first feed source, the first feed source being capacitively connected to the first feed point to excite the radiator to support a first target frequency band; and

[0007] A second feed source, the second feed source is electrically connected to the second feed point to excite the radiator to support a second target frequency band, wherein the second feed point is located in a current strong point area where the radiator supports the first target frequency band.

[0008] In the electronic device provided by the embodiment of the present application, the first feed source is capacitively fed to the first feed point, so that the radiator can support the first target frequency band. The second feed source is electrically connected to the second feed point and is located in the current strong point area where the radiator supports the first target frequency band. Therefore, the radiator can support both the first target frequency band and the second target frequency band, so that one radiator of the antenna assembly can support more frequency bands and has better communication performance. In addition, the second feed source is electrically connected to the second feed point, and the second feed point is located in the current strong point area where the radiator supports the first target frequency band, so that the radiator supporting the first target frequency band and the radiator supporting the second target frequency band can share the same body. Compared with using one radiating branch to support the first target frequency band and another radiating branch to support the second target frequency band, the number of radiators in the antenna assembly of the electronic device provided by the embodiment of the present application is small, and the space utilization rate of the electronic device is high. Furthermore, the second feeding point is located in the current strong point area of ​​the radiator supporting the first target frequency band, so that the second target frequency band supported by the antenna assembly and the first target frequency band supported by the antenna assembly have little or no mutual influence, and the communication performance of the antenna assembly is good. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0011] Figure 2 for Figure 1 Schematic diagram of the equivalent structure of the antenna assembly in FIG.

[0012] Figure 3 for Figure 1 A side view of the structure of the antenna assembly provided in;

[0013] Figure 4 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0014] Figure 5 A schematic diagram showing the size identification of a radiator in an antenna assembly in an electronic device shown in an embodiment;

[0015] Figure 6 for Figure 2A schematic diagram showing the size identification of a radiator in an antenna assembly in an electronic device;

[0016] Figure 7 for Figure 2 A schematic diagram showing the identification of the first feeding point to the end face in the antenna assembly shown;

[0017] Figure 8 for Figures 1 to 3 The S-parameter schematic diagram of the antenna assembly shown when supporting the first target frequency band;

[0018] Fig. 9 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0019] Fig.10 for Fig. 9 Schematic diagram of the equivalent structure of the antenna assembly in FIG.

[0020] Fig.11 A schematic diagram of current distribution when an antenna assembly of an electronic device supports a first target frequency band and a second resonance mode according to an embodiment;

[0021] Fig.12 A directional pattern when an antenna assembly of an electronic device supports a first operating frequency band in a first target frequency band provided in an embodiment;

[0022] Fig.13 A schematic diagram of the physical lengths of a first radiation arm and a second radiation arm in an electronic device provided in an embodiment;

[0023] Fig.14 A schematic diagram of the distance between the second feeding point and the point with the strongest current in the antenna assembly of an electronic device provided in one embodiment of the present application;

[0024] Fig.15 Directional diagrams for each antenna component when supporting WiFi frequency bands;

[0025] Fig.16 A schematic diagram of beam pointing corresponding to the position of the first feeding point in each antenna assembly;

[0026] Fig.17 It is a simulation schematic diagram of a monopole antenna supporting WiFi frequency band in the related art;

[0027] Fig.18 for Fig.17 The directional pattern of the monopole antenna shown in;

[0028] Fig.19 A schematic diagram and a directional diagram of current distribution of an antenna assembly provided in one embodiment of the present application;

[0029] Fig. 20A schematic diagram of current distribution of a dipole antenna and an antenna assembly 10 provided in an embodiment of the present application;

[0030] Fig.21 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;

[0031] Fig. 22 for Fig.21 Schematic diagram of the weak current area and strong current area in the floor shown;

[0032] Fig.23 for Fig. 9 A schematic diagram of the current weak point area in the antenna assembly provided in;

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

[0034] Fig.25 Schematic diagram of an antenna assembly for setting an inductive device to reduce the size of the radiator;

[0035] Fig.26 A partial structural schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0036] Fig. 27 A partial structural schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0037] Fig.28 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0038] Fig.29 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0039] Fig.30 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0040] Fig.31 Schematic diagram of an antenna assembly that does not adopt the embodiment of the present application and an antenna assembly provided by the embodiment of the present application;

[0041] Fig.32 It is a schematic diagram comparing the system efficiency of each frequency band of the second target frequency band supported by the antenna assembly that does not adopt the implementation scheme of the present application and the antenna assembly of the present application in free space;

[0042] Fig.33 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0043] Fig.34 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0044] Fig.35 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0045] Fig.36 A schematic diagram of an antenna assembly provided in an embodiment of the present application switching various frequency bands supporting a second target frequency band through a switch unit;

[0046] Fig.37 A schematic diagram of S parameters of a first target frequency band when an antenna assembly provided in an embodiment of the present application switches frequency bands supporting a second target frequency band through a switch unit;

[0047] Fig.38 A three-dimensional schematic diagram of an electronic device provided in one embodiment. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Please also read Figure 1 , Figure 2 , Figure 3 and Fig.38 , Figure 1 A schematic diagram of the structure of an antenna assembly provided in one embodiment of the present application; Figure 2 for Figure 1Schematic diagram of the equivalent structure of the antenna assembly in FIG. Figure 3 for Figure 1 A side view of the structure of the antenna assembly provided in; Fig.38 A three-dimensional schematic diagram of an electronic device provided in an embodiment. The embodiment of the present application provides an electronic device 1, the electronic device 1 comprising a floor 111 and an antenna assembly 10. The floor 111 comprises a first side 1111 and a second side 1112 connected by a bend. The antenna assembly 10 comprises a radiator 120, a first feed source S1 and a second feed source S2. The radiator 120 comprises a first radiating arm 120a and a second radiating arm 120b connected by a bend, the first radiating arm 120a being arranged adjacent to the first side 1111, the second radiating arm 120b being arranged adjacent to the second side 1112, the first radiating arm 120a having a first open-circuit end 121, the second radiating arm 120b having a second open-circuit end 122, and the radiator 120 further comprising a first feeding point P1 and a second feeding point P2. The first feed source S1 is capacitively connected to the first feeding point P1 to excite the radiator 120 to support the first target frequency band. The second feed source S2 is electrically connected to the second feeding point P2 to excite the radiator 120 to support the second target frequency band, wherein the second feeding point P2 is located in the current strong point area 12c where the radiator 120 supports the first target frequency band.

[0052] In one embodiment, the floor 111 is taken as an example of the ground in the circuit board 110. The floor 111 may be, but is not limited to, a metal layer (such as a copper layer) in the circuit board 110. The large metal layer in the circuit board 110 usually constitutes the floor 111, also known as the ground electrode. It is understandable that the circuit board 110 also includes multiple insulating layers and multiple wiring layers. The floor 111 is usually sandwiched between two adjacent insulating layers. The wiring layer is also arranged between adjacent insulating layers, and the wiring layer and the floor 111 are arranged with an insulating layer between them. Different wiring layers can be electrically connected through wires or metal through holes. It is understandable that the introduction of the floor 111 here is only one case of the circuit board 110, and should not be understood as a limitation on the floor 111 provided in the embodiment of the present application.

[0053] The first side 1111 is connected to the second side 1112 by bending, and the connection between the first side 1111 and the second side 1112 can be an arc shape or a right angle. The present application does not limit the shape of the connection between the first side 1111 and the second side 1112.

[0054] In this embodiment, the length of the first side 1111 is greater than the length of the second side 1112 , and therefore, the first side 1111 is also referred to as a long side, and the second side 1112 is also referred to as a short side.

[0055] In one embodiment, the floor 111 and the radiator 120 together constitute a dipole antenna, the floor 111 is a radiating branch of the dipole antenna, named as a first radiating branch, and the radiator 120 is another radiating branch of the dipole antenna, named as a second radiating branch. When the antenna assembly 10 is working, the floor 111 and the radiator 120 both participate in the work. In other words, when the antenna assembly 10 is working, the first radiating branch and the second radiating branch both participate in the work.

[0056] The radiator 120 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator 120, or a print direct structuring (PDS) radiator, or a metal branch radiator. When the antenna assembly 10 is applied to an electronic device 1, the radiator 120 can be a mechanical design antenna (MDA) radiator designed using the metal insert of the electronic device 1 itself. For example, the radiator 120 can be an antenna radiator 120 designed using the middle frame formed by plastic and metal of the electronic device 1. In addition, the radiator 120 can also be a metal frame antenna radiator 120 designed with a metal middle frame.

[0057] The radiator 120 has two radiating arms connected by bending, which are named as the first radiating arm 120a and the second radiating arm 120b. The angle between the first radiating arm 120a and the second radiating arm 120b can be 90°, or approximately 90° (for example, 80° to 100°). The radiator 120 also has two ends, both of which are not grounded. In other words, the radiator 120 is in an open-circuit state at both ends, so the two ends are named as the first open-circuit end 121 and the second open-circuit end 122. In this embodiment, the first radiating arm 120a has the first open-circuit end 121, and the second radiating arm 120b has the second open-circuit end 122.

[0058] In one embodiment, the antenna assembly 10 further includes a first electrical connector 160 (see Figure 1 and Figure 3 ), the first feed source S1 is electrically connected to the first feeding point P1 through the first electrical connection member 160. The first electrical connection member 160 may be, but is not limited to, an elastic conductive sheet, or a conductive screw, etc.

[0059] The first feed source S1 is electrically connected to the first feeding point P1 through the first electrical connector 160, so that the electrical connection between the first feed source S1 and the first feeding point P1 can be realized, which is simple and easy. In one embodiment, the first feeding point P1 is located on the surface (lower surface) of the radiator 120 close to the floor 111 and protrudes from the lower surface of the radiator 120. It can be understood that in other embodiments, the first feeding point P1 can also be located on the upper surface of the radiator 120, but flush with the upper surface of the radiator 120; or, in other embodiments, the first feeding point P1 can also be located on the side of the radiator 120; or, in other embodiments, the first feeding point P1 is located on the surface (upper surface) of the radiator 120 away from the floor 111. Schematic diagram of this embodiment Figure 3 The position of the first feeding point P1 shown in FIG. 1 should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application.

[0060] In one embodiment, the antenna assembly 10 further includes a second electrical connector 170 (see Figure 1 and Figure 3 ), the second feed source S2 is electrically connected to the second feeding point P2 through the second electrical connection member 170. The second electrical connection member 170 may be, but is not limited to, an elastic conductive sheet, or a conductive screw, etc.

[0061] The second feed source S2 is electrically connected to the second feeding point P2 through the second electrical connector 170, so that the electrical connection between the second feed source S2 and the second feeding point P2 can be realized, which is simple and easy. In one embodiment, the second feeding point P2 is located on the surface (lower surface) of the radiator 120 close to the floor 111 and protrudes from the lower surface of the radiator 120. It can be understood that in other embodiments, the second feeding point P2 can also be located on the upper surface of the radiator 120, but flush with the upper surface of the radiator 120; or, in other embodiments, the second feeding point P2 can also be located on the side of the radiator 120; or, in other embodiments, the second feeding point P2 is located on the surface (upper surface) of the radiator 120 away from the floor 111. Schematic diagram of this embodiment Figure 3 The position of the second feeding point P2 shown in the figure should not be understood as a limitation of the antenna assembly 10 provided in the embodiment of the present application.

[0062] In this embodiment, the length of the first side 1111 is greater than the length of the second side 1112. The first radiating arm 120a is disposed adjacent to the first side 1111, and therefore, the first radiating arm 120a is also referred to as a longitudinal radiating arm or a longitudinal arm. The second radiating arm 120b is disposed adjacent to the second side 1112, and therefore, the second radiating arm 120b is also referred to as a transverse arm or a horizontal arm. In the embodiment, the first feeding point P1 is located at the first open-circuit end 121 for illustration. It is understandable that, in other embodiments, the first feeding point P1 may also be located at the second open-circuit end 122. The advantages of the first feeding point P1 being located at the first open-circuit end 121 will be described in detail later.

[0063] The first feed source S1 is capacitively electrically connected to the first feed point P1. In other words, the path where the first feed source S1 is electrically connected to the first feed point P1 has a capacitor C0. For example, one end of the first feed source S1 is directly or indirectly electrically connected to one end of the capacitor C0, and the other end of the capacitor C0 is electrically connected to the first feed point P1.

[0064] The first feed source S1 is capacitively connected to the first feeding point P1 to adapt to the capacitive feeding requirement of the open-circuited end of the balanced mode of the radiator 120, so as to excite the balanced mode supporting the first target frequency band. Specifically, because the two ends of the radiator 120 are open, that is, the radiator 120 has a first open-circuited end 121 and a second open-circuited end 122, the radiator 120 is a large resistor relative to the excitation signal supporting the first target frequency band generated by the first feed source S1, and only capacitive feeding can feed the excitation signal supporting the first target frequency band generated by the first feed source S1 into the first feeding point P1 of the radiator 120, and can excite the resonant mode supporting the first target frequency band. In other words, the first feed source S1 is capacitively connected to the first feeding point P1, which can facilitate the feeding of the excitation signal supporting the first target frequency band into the radiator 120 and excite the resonant mode of the balanced mode supporting the first target frequency band of the radiator 120.

[0065] In addition, the first radiator 120 includes a first radiating arm 120a and a second radiating arm 120b that are connected by bending. Therefore, the current of the first radiating arm 120a can be orthogonal to the current of the second radiating arm 120b, thereby making the lateral component and the longitudinal component of the current supporting the first target frequency band in the electronic device 1 more balanced, so that the antenna assembly 10 has better full phase when operating in the first target frequency band.

[0066] In one embodiment, see Figure 4 , Figure 4A schematic diagram of an antenna assembly provided for another embodiment of the present application. The antenna assembly 10 also includes a first matching circuit M1. The first matching circuit M1 is used to match the output impedance of the first feed source S1 and the input impedance of the radiator 120. The first feed source S1 electrically connects the first matching circuit M1 to the one end of the capacitor, and the other end of the capacitor is electrically connected to the first feeding point P1. It can be understood that in other embodiments, the antenna assembly 10 may not include the first matching circuit M1. In one embodiment, the first matching circuit M1 includes one or more of a capacitor, an inductor, or a resistor.

[0067] The so-called current strong point area 12c of the radiator 120 supporting the first target frequency band means that when the radiator 120 supports the first target frequency band, there will be current distribution on the radiator 120, and the radiator 120 has the strongest current point O2, and the current strong point area 12c refers to the area including the strongest current point O2. In other words, the current strong point area 12c includes the area including the strongest current point O2.

[0068] See also Figure 5 , Figure 5 Schematic diagram of the size identification of the radiator in the antenna assembly of the electronic device shown in one embodiment. Normally, the strongest current point O2 when the radiator 120 supports the first target frequency band is located at the midpoint O1 of the total length of the path from the first open end 121 of the radiator 120 to the connection between the first radiating arm 120a and the second radiating arm 120b, and the path from the connection to the second open end 122. The specific situation is described as follows. In this embodiment, the length of the first radiating arm 120a is equal to the length of the second radiating arm 120b, and the strongest current point O2 is located at the connection between the first radiating arm 120a and the second radiating arm 120b. When the length of the first radiating arm 120a is equal to the length of the second radiating arm 120b, the strongest current point O2 is located at the connection between the first radiating arm 120a and the second radiating arm 120b. Please refer to Figure 5 When the length of the first radiation arm 120a is greater than the length of the second radiation arm 120b, the strongest current point O2 is located in the first radiation arm 120a, and the distance between the strongest current point O2 and the end surface 1211 of the first open end 121 away from the connection is the length d 01 The distance from the strongest current point O2 to the connection point (select the midpoint O3 of the connection point) is the second distance d 02 The distance between the connection and the surface of the second open end 122 facing away from the connection is d 03 , then d 01 =d02 +d 03 . See Figure 6 , Figure 6 for Figure 2 The schematic diagram of the size identification of the radiator in the antenna assembly of the electronic device shown. Figure 2 and Figure 6 In the radiator 120 of the antenna assembly 10 shown, the length of the first radiating arm 120a is greater than the length of the second radiating arm 120b, and the strongest current point O2 is located at the first radiating arm 120a. When the length of the first radiator 120 is less than the length of the second radiator 120, the strongest current point O2 is located at the second radiating arm 120b, and the length from the strongest current point O2 to the surface of the first radiating second open-circuit end 122 away from the connection is d 01 ', the length between the strongest current point O2 and the connection point is d 02 ', the length from the connection to the end surface 1211 of the first open end 121 away from the connection is d 03 ', then there is d 01 '=d 02 '+d 03 The second feeding point P2 is located in the current strong point area 12c where the radiator 120 supports the first target frequency band, so that when the radiator 120 supports the second target frequency band, the radiator 120 has little or no effect on the first target frequency band supported by the radiator 120.

[0069] In the electronic device 1 provided in the embodiment of the present application, the first feed source S1 is capacitively fed to the first feed point P1, so that the radiator 120 can support the first target frequency band. The second feed source S2 is electrically connected to the second feed point P2, and is located in the current strong point area 12c where the radiator 120 supports the first target frequency band, so that the radiator 120 can support both the first target frequency band and the second target frequency band, so that one radiator 120 of the antenna assembly 10 can support more frequency bands and have better communication performance. In addition, the second feed source S2 is electrically connected to the second feed point P2, and the second feed point P2 is located in the current strong point area 12c where the radiator 120 supports the first target frequency band, so that the radiator 120 supporting the first target frequency band and the radiator 120 supporting the second target frequency band can be coexistent. Compared with using one radiating branch to support the first target frequency band and another radiating branch to support the second target frequency band, the number of radiators 120 in the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application is small, and the space utilization rate of the electronic device 1 is high. Furthermore, the second feeding point P2 is located in the current strong point area 12c where the radiator 120 supports the first target frequency band, which can make the mutual influence between the second target frequency band supported by the antenna assembly 10 and the first target frequency band supported by the antenna assembly 10 small or even no influence.

[0070] Please continue reading Figure 2 In this embodiment, the length of the first side 1111 is greater than the length of the second side 1112 , and the first feeding point P1 is located at the first open end 121 .

[0071] The length of the first side 1111 is greater than the length of the second side 1112, so the first side 1111 is the long side of the floor 111, and the second side 1112 is the short side of the floor 111. Therefore, the first radiating arm 120a is arranged adjacent to the long side of the floor 111, and the second radiating arm 120b is arranged adjacent to the short side of the floor 111. The first feeding point P1 is located at the first open end 121, that is, the first feeding point P1 is located at the longitudinal arm of the radiator 120. Therefore, when the radiator 120 supports the first target frequency band, the current of the radiator 120 when supporting the first target frequency band is directed to the right side (illustrated perspective), so the directional diagram is directed to the upper right, and the main direction of the current that excites the floor 111 when the radiator 120 supports the first target frequency band is downward (illustrated perspective), so when the antenna assembly 10 works in the first target frequency band, the directional diagram is relatively balanced and the omnidirectionality is good, and the communication effect of the electronic device 1 when using the first target frequency band of the antenna assembly 10 for communication is relatively good.

[0072] If the length of the first side 1111 is greater than the length of the second side 1112, the first feeding point P1 is located at the second open end 122. In other words, the first feeding point P1 is located at the cross arm of the radiator 120. Then, when the antenna assembly 10 operates in the first target frequency band, the current of the first radiator 120 when supporting the first target frequency band is downward (from the perspective of the diagram), so the directivity pattern is downward, and the direction of the main current that excites the floor 111 when the radiator 120 supports the first target frequency band is downward (from the perspective of the diagram), so when the antenna assembly 10 operates in the first target frequency band, the directivity pattern is more downward, and the omnidirectionality is relatively not so good. However, no matter the first feeding point P1 is located at the first open end 121 or the first feeding point P1 is located at the second open end 122, as long as the second feeding point P2 is located at the current strong point area 12c where the radiator 120 supports the first target frequency band, it is possible to achieve that the radiator 120 can support both the first target frequency band and the second target frequency band.

[0073] See also Figure 7 , Figure 7 for Figure 2 The first open end 121 has an end surface 1211 facing away from the second radiating arm 120b, and the distance d1 between the first feeding point P1 and the end surface 1211 satisfies: Among them, λ1 is the wavelength corresponding to the center frequency point of the first target frequency band.

[0074] Specifically, the distance d1 can be, but is not limited to, 0, or or wait.

[0075] When the distance d1 satisfies: When the first feed source S1 is used, a relatively pure balanced mode can be excited on the radiator 120, thereby making the antenna assembly 10 less directive and more omnidirectional when supporting the first target frequency band, and providing a better communication effect when the electronic device 1 uses the first target frequency band of the antenna assembly 10.

[0076] See also Figure 8 , Figure 8 for Figures 1 to 3The S parameter diagram of the antenna assembly shown supports the first target frequency band. The radiator 120 is excited to generate a first resonant mode (marked as a in the figure) and a second resonant mode (marked as b in the figure), wherein the first resonant mode is used to support a first operating frequency band of the first target frequency band, and the second resonant mode is used to support a second operating frequency band of the first target frequency band.

[0077] In this simulation diagram, the horizontal axis is frequency, in GHz, and the vertical axis is S parameters, in dB. It can be seen from this simulation diagram that the radiator 120 has two resonance modes when supporting the first target frequency band, namely the first resonance mode and the second resonance mode.

[0078] In this embodiment, the first target frequency band is a Wireless Fidelity (WiFi) frequency band, the first working frequency band is a Wireless Fidelity (WiFi) 2.4G frequency band, and the second working frequency band is a WiFi 5G frequency band. It can be understood that in this embodiment, the first target frequency band is a WiFi frequency band as an example for illustration, and in other embodiments, the first target frequency band may also be other frequency bands. In this embodiment, the first target frequency band is a WiFi frequency band, the first working frequency band is a WiFi 2.4G frequency band, and the second working frequency band is a WiFi 5G frequency band as an example for illustration, and in other embodiments, when the first target frequency band is other frequency bands, the first working frequency band may also be a sub-frequency band in other frequency bands, and accordingly, the second working frequency band may also be a sub-frequency band in other frequency bands.

[0079] WiFi technology is a technology that connects electronic devices 1 such as personal computers, mobile phones, smart screens, and laptops to each other wirelessly. The requirements for electronic devices 1 to communicate using WiFi bands are getting higher and higher. The consistency and stability of the connection experience of electronic devices 1 in different directions become more important. In other words, when electronic devices 1 communicate using WiFi bands, in order to have better connection consistency and stability in different directions, electronic devices 1 are required to have better omnidirectionality (i.e., lower directivity) in the WiFi band.

[0080] In the antenna assembly 10 provided in one embodiment of the present application, the length of the first side 1111 is greater than the length of the second side 1112, and the first feeding point P1 is located at the first open end 121. Therefore, when the radiator 120 supports the first target frequency band, the current of the radiator 120 when supporting the first target frequency band is directed to the right (from the perspective of the diagram), so the directivity pattern is directed to the upper right, and the current that excites the floor 111 when the radiator 120 supports the first target frequency band is mainly directed downward (from the perspective of the diagram), so when the antenna assembly 10 operates in the first target frequency band, the directivity pattern is relatively balanced and the omnidirectionality is better, and the communication effect of the electronic device 1 when communicating using the first target frequency band of the antenna assembly 10 is better.

[0081] The antenna component 10 in the electronic device 1 provided in the embodiment of the present application, the radiator 120 is excited to generate two resonance modes (i.e., the first resonance mode and the second resonance mode) to support two operating frequency bands (i.e., the first operating frequency band and the second operating frequency band), so that when the antenna component 10 operates in the first target frequency band, it can work in both the first operating frequency band and the second operating frequency band, and therefore, has more communication frequency bands and better communication performance.

[0082] Further, the first resonance mode is a half-wavelength balanced mode of the radiator 120 , and the second resonance mode is a three-quarter-wavelength mode of the radiator 120 .

[0083] It should be noted that the "wavelength" in "half wavelength" in "the first resonant mode is a half wavelength balanced mode of the radiator 120" refers to the wavelength corresponding to the center frequency (also called the center frequency point) of the first working frequency band in the first target frequency band supported by the antenna assembly 10. The "wavelength" in "three quarter wavelength" in "the second resonant mode is a three quarter wavelength mode of the radiator 120" refers to the wavelength corresponding to the center frequency (also called the center frequency point) of the second working frequency band in the first target frequency band supported by the antenna assembly 10.

[0084] In the implementation manner of the present application, the radiator 120 can utilize both the half-wavelength balanced mode of the radiator 120 and the three-quarter wavelength mode of the radiator 120, so that the radiator 120 can support both the first operating frequency of the first target frequency band and the second operating frequency of the first target frequency band. Compared with using one radiator 120 to support one operating frequency band, the antenna assembly 10 provided in the implementation manner of the present application has better communication effect.

[0085] See also Fig. 9 and Fig.10, Fig. 9 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig.10 for Fig. 9 In the antenna assembly 10 provided in the previous embodiment, the radiator 120 of the antenna assembly 10 is located at the upper left corner of the floor 111 as an example. Fig. 9 In the figure, the radiator 120 of the antenna assembly 10 is located at the upper right corner of the floor 111. It can be understood that in other embodiments, the radiator 120 of the antenna assembly 10 can also be located at the lower left corner or the lower right corner of the floor 111.

[0086] Please also read Fig.11 and Fig.12 , Fig.11 A schematic diagram of current distribution when an antenna assembly of an electronic device supports a first target frequency band and a second resonance mode according to an embodiment; Fig.12 An embodiment provides a directional pattern of an antenna assembly of an electronic device supporting a first operating frequency band in a first target frequency band. Fig.11 (a) is a schematic diagram of current distribution in the first resonant mode when the antenna assembly 10 of the electronic device 1 supports the first target frequency band; Fig.11 (b) is a schematic diagram of the current distribution of the second resonant mode when the antenna assembly 10 of the electronic device 1 supports the first target frequency band. It can be seen that the first resonant mode is a half-wavelength balanced mode of the entire radiator 120, which is used to cover the first working frequency band (the WiFi 2.4G frequency band in this embodiment); the second resonant mode is a three-quarter wavelength mode of the entire radiator 120, which is used to cover the second working frequency band (the WiFi 5G frequency band in this embodiment). Fig.12 (a), (b) and (c) are respectively the directional diagrams when the antenna component 10 supports the first working frequency band (the WiFi 2.4G frequency band in this embodiment) when the electronic device 1 is in different postures. It can be seen from the simulation diagram that, since the antenna component 10 operates in the first working frequency band, the current mode corresponding to the first resonant mode is a half-wavelength balanced mode. Since the half-wavelength balanced mode has balanced and orthogonal characteristics, the directional diagram of the antenna component 10 when supporting the first working frequency band tends to be omnidirectional, and the directivity is 3.15dBi, which is less than the directivity in the prior art. Therefore, the antenna component 10 has better omnidirectionality when supporting the first working frequency band, and has better communication effect when the antenna component 10 uses the first working frequency band for communication.

[0087] See also Fig.13 , Fig.13Schematic diagram of the physical lengths of the first radiation arm and the second radiation arm in an electronic device provided in an embodiment. In this embodiment, the physical length L of the first radiation arm 120a is AB The physical length L of the second radiation arm 120b is Bc satisfy:

[0088] The physical length of the first radiation arm 120a refers to the length of the first radiation arm 120a in the extending direction of the first radiation arm 120a. The physical length of the second radiation arm 120b refers to the length of the second radiation arm 120b in the extending direction of the second radiation arm 120b.

[0089] The physical length L of the first radiating arm 120a is AB The physical length L of the second radiation arm 120b is Bc satisfy 0.5, 1.0, 1.5, 2.0, etc., are not limited here, as long as they meet

[0090] When the physical length L of the first radiation arm 120a is AB The physical length L of the second radiation arm 120b is Bc Satisfy: When the radiator 120 supports the first target frequency band, it can have better orthogonality characteristics, thereby making the radiator 120 have better omnidirectionality when supporting the first target frequency band.

[0091] See also Fig.14 , Fig.14 A schematic diagram of the distance between the second feeding point and the strongest current point in the antenna assembly of an electronic device provided in one embodiment of the present application. The strong current point area 12c has the strongest current point O2 when supporting the first target frequency band, and the distance d2 between the second feeding point P2 and the strongest current point O2 satisfies: Among them, λ1 is the wavelength corresponding to the center frequency point of the first target frequency band.

[0092] Specifically, d2 may be, but is not limited to, 0 or or or etc., or other values ​​other than those listed above, as long as they meet That's it.

[0093] When the distance d2 between the second feeding point P2 and the strongest current point O2 satisfies: When the radiator 120 supports the second target frequency band, it can have little impact or even no impact on the first target frequency band supported by the radiator 120.

[0094] The principle of the radiator 120 supporting the first target frequency band is introduced below.

[0095] When the first target frequency band is a WiFi frequency band, and the second target frequency band is a low frequency band or other frequency bands. The second target frequency band does not restrict the shape of the radiator 120. Therefore, the shape of the radiator 120 needs to be determined according to the requirement of low directivity (i.e., good omnidirectionality) of the first target frequency band supported by the radiator 120 as the WiFi frequency band. When the radiator 120 of the antenna assembly 10 supports the WiFi frequency band, the antenna system composed of the floor 111 (usually the ground in the motherboard of the electronic device 1) and the radiator 120 can be regarded as a dipole antenna with a biased feeding point, and the floor 111 and the radiator 120 can be regarded as two oscillators of the dipole antenna. In the related art, the reason why the antenna assembly 10 in the electronic device 1 has strong directivity (i.e., poor omnidirectionality) when supporting the WiFi frequency band is that the current on the floor 111 is mainly longitudinal current (i.e., the current along the long side direction of the floor 111), and the longitudinal length of the floor 111 is usually much larger than the quarter-wavelength electrical length of the WiFi frequency band. Based on the basic principle of the dipole antenna, when the length of the dipole increases, the continuous current distributed along the radiator 120 will have more zero points, which will result in more zero points in the radiation pattern, and the radiation at the zero points in the corresponding radiation pattern is poor or even non-existent, resulting in poor omnidirectionality of the antenna assembly 10 when supporting the WiFi frequency band.

[0096] See also Fig.15 , Fig.15 The directional diagrams of each antenna assembly when supporting the WiFi frequency band. In order to illustrate the influence of different lengths of the floor 111 on the zero point of the WiFi frequency band supported by the antenna assembly 10, Fig.15 In the figure, (a), (b), (c) and (d) are used as examples for analysis and explanation. Fig.15 (a) is the directional diagram when the antenna component 10 is a half-wavelength antenna; Fig.15 (b) is a directional diagram of the WiFi frequency band supported when the antenna assembly 10 is a full-wave antenna; Fig.15 (c) is the directional diagram of the WiFi frequency band supported when the antenna assembly 10 is two-thirds of the wavelength; Fig.15(d) in the figure is the directional diagram of the antenna assembly 10 supporting the WiFi frequency band when it is two wavelengths. When the radiator 120 of the antenna assembly 10 supports the WiFi frequency band, the antenna system composed of the floor 111 (usually the ground in the motherboard of the electronic device 1) and the radiator 120 can be regarded as a dipole antenna with a biased feeding point. The biased dipole antenna will tilt the radiation direction toward the current lag direction (i.e., the long arm direction of the dipole antenna) due to the current phase difference, resulting in enhanced directivity and poor omnidirectionality of the antenna assembly 10 when supporting the WiFi frequency band. When equivalent to the electronic device 1, when the antenna assembly 10 supports the WiFi frequency band, the radiation direction will be tilted toward the longitudinal direction of the floor 111. By Fig.15 It can be seen that when the floor 111 is longer than the wavelength of the WiFi frequency band, the longer the floor 111 is, the more zero points the biased dipole antenna formed by the floor 111 and the radiator 120 has when supporting the WiFi frequency band, and the omnidirectionality when supporting the WiFi frequency band is poor.

[0097] See also Fig.16 , Fig.16 is a schematic diagram of beam pointing corresponding to the position of the first feeding point in each antenna assembly. Fig.16 In (a) to (d), the triangle is the position of the first feeding point P1, and the left and right sides of the first feeding point P1 represent the two oscillators of the dipole antenna, where the oscillator on the left is equivalent to the floor 111, and the oscillator on the right is equivalent to the radiator 120. Fig.16 (a) to (d) in Fig.16 In (a), the first feeding point P1 is located in the middle, and the length of the left oscillator is equal to the length of the right oscillator; Fig.16 In (b), (c) and (d), the first feeding point P1 is not located in the middle, and Fig.16 From (b) to (c) to (d), the position of the first feeding point P1 is offset more and more. Fig.16 As can be seen from (a) in FIG. 1 , when the first feeding point P1 is located in the middle, similar to a half-wavelength antenna, the maximum direction of the radiation pattern (i.e., the extension direction of the long axis of the elliptical pattern in the figure) is biased towards the middle and is approximately perpendicular to the extension direction of the radiator 120. Fig.16 As can be seen from (a) to (b) to (c) to (d), the maximum directivity in the radiation pattern gradually deflects, the directivity intensity gradually increases, and the omnidirectionality becomes weaker and weaker.

[0098] See also Fig.17 and Fig.18 , Fig.17 It is a simulation schematic diagram of a monopole antenna supporting WiFi frequency band in the related art; Fig.18for Fig.17 The directional pattern of the monopole antenna shown in . Among them, Fig.17 (a) is a simulation model diagram of a monopole antenna supporting the WiFi frequency band from one perspective;

[0099] Fig.17 (b) is a schematic diagram of a monopole antenna supporting the WiFi band from another perspective; Fig.17 (c) in Fig.17 Schematic diagram of current simulation of the monopole antenna in (a) and (b). Fig.18 (a) in Fig.17 The directional pattern of the monopole antenna from one perspective; Fig.18 (b) in Fig.17 The directional pattern of the monopole antenna from another perspective; Fig.19 (c) in Fig.17 The directional diagram of the monopole antenna from another perspective. Fig.17 In, the antenna supporting the WiFi frequency band includes a floor 111 and a radiator 120. The floor 111 includes a first side 1111 and a second side 1112 connected by bending. The length of the first side 1111 is greater than the length of the second side 1112. The radiator 120 includes two connected radiating arms that are bent, named as a first radiating arm 120a and a second radiating arm 120b, wherein the first radiating arm 120a is arranged adjacent to the first side 1111, and the second radiating arm 120b is arranged adjacent to the second side 1112. The first radiating arm 120a has a first open end 121 and a first feeding point P1, and the first feeding point P1 is arranged at the first open end 121. In Fig.17 (c) and Fig.18 It can be seen that when the antenna in the related art supports the WiFi frequency band, the floor 111 and the radiator 120 both participate in the radiation, and the radiation mainly relies on the floor 111, that is, the antenna is excited to an unbalanced mode. In addition, when the radiator 120 supports the WiFi frequency band, it is a quarter-wavelength mode. Fig.17 In (c), the point where the current direction of the outermost circle of the floor 111 is opposite is the zero point, which shows that the floor 111 has multiple zero points. Fig.18 It can be seen that the antenna has multiple zero points when supporting the WiFi frequency band. It can be seen that the antenna supporting the WiFi frequency band in the related art has more zero points and poor omnidirectionality when supporting the WiFi frequency band.

[0100] Therefore, in order to reduce the directivity of the antenna when supporting the WiFi frequency band and improve the omnidirectionality of the antenna when supporting the WiFi frequency band, a more reasonable method is to suppress the longitudinal current (i.e., the current along the extension direction of the first side 1111) of the floor 111 containing high-order modes (such as the ground of the motherboard), increase the proportion of the transverse current (also called transverse mode current, i.e., the current along the extension direction of the second side 1112), and design an antenna with omnidirectional radiation capability at the same time, so that when the antenna supports the WiFi frequency band, the total radiation is mainly provided by the radiator 120 of the antenna. Fig.17 It can be seen that in the related art, when the antenna supporting the WiFi frequency band supports the WiFi frequency band, the current of the floor 111 is mainly longitudinal current. Fig.18 It can be seen that in the related art, when the antenna supporting the WiFi band supports the WiFi band, the maximum radiation direction of the directional diagram is toward the lower side of the floor 111. Therefore, when the antenna supporting the WiFi band supports the WiFi band, when the excited mode is the balanced mode (also called the balanced mode), the current proportion of the floor 111 (for example, the ground of the motherboard) will be greatly reduced, and the current proportion of the radiator 120 will be greatly increased. When the antenna supporting the WiFi band supports the WiFi band, the radiation is mainly provided by the radiator 120 itself. Since the current of the balanced mode is distributed in a half-period sinusoidal distribution on the radiator 120, if the radiator 120 is bent at the strongest current point O2 or at the current strong point area 12c including the strongest current point O2, so that the radiator 120 includes two radiating arms connected by bending, and the two radiating arms are symmetrically distributed or approximately symmetrically distributed on the horizontal and vertical sides of the floor 111, the current distribution on the two arms of the antenna is symmetrical and orthogonal or approximately symmetrical and orthogonal, so that the directional diagram of the radiation of the antenna supporting the WiFi band can achieve an omnidirectional or approximately omnidirectional effect. See also Fig.19 , Fig.19 A schematic diagram and a directional diagram of current distribution of an antenna assembly provided in one embodiment of the present application. Fig.19 (a) is a schematic diagram of current distribution on the radiator 120 in the antenna assembly 10; Fig.19 (b) is a schematic diagram of current distribution in the antenna assembly 10; Fig.19 (c) in Fig.19 The directional pattern of the antenna shown in (a) when it supports the WiFi frequency band. Fig.19 It can be seen that the current distribution on the two arms of the antenna (the first radiation arm 120a and the second radiation arm 120b) is symmetrical and orthogonal or approximately symmetrical and orthogonal, so that the radiation pattern of the antenna supporting the WiFi frequency band can achieve an omnidirectional or approximately omnidirectional effect.

[0101] The orthographic projection of the second feeding point P2 on the floor 111 is also located in the current weak point area 110 a of the floor 111 .

[0102] Please also read Fig. 20 , Fig. 20 Schematic diagram of current distribution of a dipole antenna and an antenna assembly 10 provided in an embodiment of the present application. Fig. 20 (a) is a schematic diagram of current distribution of a dipole antenna; Fig. 20 (b) is a schematic diagram of current distribution after one of the radiating arms in the dipole antenna is widened; Fig. 20 (c) is a schematic diagram of current distribution after a radiating arm in a dipole antenna is widened; Fig. 20 (d) is a schematic diagram of the current distribution of the antenna assembly 10 provided in the embodiment of the present application. Fig. 20 It can be seen that from (a) to (d), one radiating arm of the dipole antenna gradually widens. It can be seen that the floor 111 in the antenna assembly 10 of the present application can be equivalent to one radiating arm of the dipole antenna. Specifically, the floor 111 in the antenna assembly 10 can be regarded as an antenna vibrator with a certain width in the dipole antenna. In this way, the floor 111 of the circuit board 110 and the radiator 120 are like a dipole antenna with a biased feeding point P.

[0103] When the antenna assembly 10 is applied to an electronic device 1 such as a mobile phone, the longitudinal dimension (length) and the transverse dimension (width) of the electronic device 1 are about 155mm×75mm. For the low-frequency band, the longitudinal dimension of the electronic device 1 is equivalent to 1 / 4 of the wavelength of the low-frequency band. According to the basic principle of the dipole antenna, that is, the longitudinal current of the floor 111 is fully stimulated, the equivalent aperture of the dipole antenna can be increased and the efficiency can be improved. At the same time, the floor 111 in the antenna assembly 10 provided in the embodiment of the present application is an effective radiator (i.e., the first radiation branch). The lower the frequency of the second target frequency band supported by the antenna assembly 10, the more significant the current effect of the floor 111, that is, for the antenna assembly 10 whose second target frequency band is a low-frequency band, the longitudinal current of the floor 111 can be fully stimulated, which can effectively improve the radiation efficiency of the antenna assembly 10.

[0104] In summary, in the implementation manner of the present application, the floor 111 can be regarded as a radiating arm (antenna vibrator) with a certain width, so that the floor 111 and the radiator 120 are a dipole antenna biased at the same feeding point P. The lower the second target frequency band supported by the dipole antenna, the more significant the current limiting effect of the floor 111, that is, for the antenna assembly 10 whose second target frequency band is a low-frequency band, the excitation current (also called longitudinal current) of the floor 111 in the same extension direction as the first side 1111 can be fully stimulated, which can effectively improve the radiation efficiency of the antenna assembly 10. It can be understood that although the second target frequency band is a low-frequency band as an example for explanation here, in other implementation manners, the second target frequency band can also be an intermediate frequency, or a high frequency, or a wireless fidelity (WiFi) frequency band, or a global positioning system (GPS) frequency band, etc. The implementation manner of the present application does not limit the second target frequency band.

[0105] The working principle of the antenna assembly 10 provided in the embodiment of the present application is described and explained below.

[0106] In this embodiment, the floor 111 can be the ground in the circuit board 110. For example, the circuit board 110 is a main board. The characteristic mode is an inherent mode that characterizes the floor 111. By analyzing the characteristic mode (also called characteristic mode) of the circuit board 110, the most suitable feeding position can be found according to the boundary conditions. The following is an example in which the second target frequency band supported by the antenna assembly 10 is a low-frequency band. The characteristic current with the largest proportion of the longitudinal current mode can be obtained through simulation. Please refer to Fig.21 and Fig. 22 , Fig.21 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. 22 for Fig.21 The current distribution of the characteristic mode is mainly characterized by the sinusoidal behavior of the edge of the floor 111, which is represented by Fig.21 It can be seen that the characteristic mode has a maximum and a minimum current distribution at a specific position. In addition to the current distribution, the voltage distribution, that is, the electric field distribution on the floor 111, can also be considered. The difference between the phase of the electric field distribution in the floor 111 and the phase of the current distribution is 90°. That is, the minimum value of the electric field distribution in the floor 111 is the same as the maximum value of the current distribution in the floor 111; conversely, the maximum value of the electric field distribution in the floor 111 is the same as the minimum value of the current distribution in the floor 111. Fig.21In the figure, the curve J next to the floor 111 is used to represent the current distribution of the floor 111, and the curve V is used to represent the voltage distribution of the floor 111. Curve J indicates that the current distribution of the floor 111 is a sine distribution. It can be seen from curve J that the two ends of the floor 111 are where the current is the smallest, and the middle position of the floor 111 is where the current is the strongest. Curve V indicates that the electric field distribution of the floor 111 is a cosine distribution. Therefore, an inductive coupling element (ICE) can be placed at the maximum position of the characteristic mode current distribution of the floor 111 (that is, the minimum electric field distribution of the floor 111) to excite the characteristic mode; or, a capacitive coupling element (CCE) can be placed at the minimum position of the characteristic mode current distribution of the circuit board 110 (that is, the maximum electric field distribution of the circuit board 110) to excite the characteristic mode. Please refer to Fig. 22 ,exist Fig. 22 In the figure, there is a current weak point area 110a of the characteristic mode current distribution of the floor 111, and a current strong point area 110b of the characteristic mode current distribution of the floor 111. However, the size of ICE is usually large and not easy to implement; the size of CCE is relatively small and easy to implement, so CCE feeding is adopted in this case. In addition, if the antenna assembly 10 is to obtain a higher radiation efficiency, it is necessary to better stimulate the longitudinal current distribution of the floor 111. It should be noted that, when using CCE feeding, in addition to setting the second feeding point P2 at the minimum point of the characteristic mode current of the floor 111, other positions other than the minimum point of the characteristic mode current in the characteristic mode current weak point area 110a of the floor 111 are also acceptable. The so-called current weak point area 110a of the characteristic mode current of the floor 111 refers to the area including the minimum value of the characteristic mode current of the floor 111. The current weak point area 110a provided in the embodiment of the present application will be quantified later. The current strong point region 110 b of the characteristic mode current of the floor panel 111 refers to a region including the maximum value of the characteristic mode current of the floor panel 111 .

[0107] In this embodiment, the radiator 120 is spaced apart from the floor 111 (see Figure 3 ), therefore, the radiator 120 excited by the feed source S acts as a radiation driving device to constitute a CCE.

[0108] In the embodiment of the present application, the number of the current weak point areas 110a of the floor 111 is four. The orthographic projection of the second feeding point P2 on the floor 111 may be located in any one of the four current weak point areas 110a of the characteristic mode current of the floor 111. Accordingly, the radiator 120 is disposed adjacent to the current weak point area 110a where the orthographic projection of the second feeding point P2 on the floor 111 is located.

[0109] In the antenna assembly 10 provided in the embodiment of the present application, when the orthographic projection of the second feeding point P2 on the floor 111 is still located in the current weak point area 110a of the floor 111, the floor 111 constitutes the main radiation branch of the second target frequency band, contributing most of the radiation of the antenna assembly 10, and the radiator 120 is equivalent to acting as a radiation driving device for the entire antenna assembly 10, becoming the excitation condition for the floor 111 to work in the second target frequency band, and the energy of the radiator 120 accounts for a very small proportion. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10.

[0110] In summary, in the antenna assembly 10 provided in the embodiment of the present application, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the second feeding point P2 on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111, which can well excite the excitation current in the same extension direction along the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the second target frequency band. It can be seen that the communication performance of the antenna assembly 10 provided in the embodiment of the present application is good. In addition, in the antenna assembly 10 provided in the embodiment of the present application, the floor 111 constitutes the main radiation branch of the second target frequency band, contributing most of the radiation of the antenna assembly 10, and the radiator 120 is equivalent to acting as the radiation driving device of the entire antenna assembly 10, becoming the excitation condition for the floor 111 to work in the second target frequency band, and the energy of the radiator 120 accounts for a very small proportion. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10.

[0111] As can be seen from the previous description, when the first target frequency band supported by the radiator 120 in the antenna assembly 10 is the WiFi frequency band, and the second target frequency band supported is the low-frequency frequency band, according to the characteristics of the low-frequency miniaturization technology (that is, the positive projection of the second feeding point P2 described above on the floor 111 is also located in the current weak point area 110a of the floor 111) and the WiFi low directivity technology, the antenna assembly 10 in the embodiment of the present application sets the first feeding point P1 and the second feeding point P2 in the radiator 120, so that the first feed source S1 can excite the radiator 120 to support the first target frequency band, and the second feed source S2 can excite the second target frequency band, so that the radiation branches supporting the first target frequency band and the second target frequency band are shared, achieving the ultimate reduction in space and cost.

[0112] For the antenna assembly 10 provided in the embodiment of the present application, it is determined that the radiation branches supporting the first target frequency band and the second target frequency band are shared, that is, the radiator 120 can support both the first target frequency band and the second target frequency band. Since the low-frequency miniaturization technology does not limit the shape of the radiator 120, the shape of the radiator 120 is determined according to the requirements of the WiFi low-directivity technology. According to the characteristics of the WiFi low-directivity technology, it is necessary to excite an orthogonal balanced mode on the radiator 120. Therefore, the radiator 120 needs to be set as a first radiating arm 120a and a second radiating arm 120b connected by bending, and the two ends of the radiator 120 are open. Therefore, the radiator 120 of the antenna assembly 10 provided in the embodiment of the present application includes a first radiating arm 120a and a second radiating arm 120b connected by bending, and the first radiating arm 120a has a first open end 121, and the second radiating arm 120b has a second open end 122, so that the antenna assembly 10 can excite an orthogonal balanced mode on the radiator 120 when using the radiator 120 to support the WiFi frequency band, so that the antenna assembly 10 has good omnidirectionality when supporting the WiFi frequency band. In addition, in order to reduce or even avoid the mutual influence when the radiator 120 supports the first target frequency band and the second target frequency band, the second feeding point P2 is set in the current strong point area 12c of the radiator 120 supporting the first target frequency band. In addition, the antenna assembly 10 provided in the embodiment of the present application needs to excite the longitudinal current of the floor 111 (also called the longitudinal characteristic current) and the WiFi low directivity technology needs to generate an orthogonal current on the radiator 120 (also called the radiator 120 current). Therefore, the orthographic projection of the second feeding point P2 on the floor 111 is also located in the current weak point area 110a of the floor 111, and the second feeding point P2 is located in the current strong point area 12c of the radiator 120 that supports the first target frequency band.

[0113] For the first radiation arm 120a and the second radiation arm 120b, please refer to the above physical length L of the first radiation arm 120a. AB The physical length L of the second radiation arm 120b is Bc The introduction of , I will not go into details here.

[0114] Furthermore, in one embodiment, the current weak point area 110a is located in an area with an intersection of an extension line of the first side 1111 and an extension line of the second side 1112 as the center and a radius of 1 / 16 of the wavelength of the second target frequency band.

[0115] The floor 111 includes two first sides 1111 disposed opposite to each other, and two second sides 1112 disposed opposite to each other, the number of the current weak point areas 110a is four, the orthographic projection of the second feeding point P2 on the floor 111 is located in any one of the four current weak point areas 110a, and the radiator 120 is located in the current weak point area 110a adjacent to the second feeding point P2.

[0116] See also Fig.23 , Fig.23 for Fig. 9 The schematic diagram of the current weak point area in the antenna assembly provided in. The current weak point area 110a is located in an area with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center O and 1 / 16 of the wavelength of the second target frequency band as the radius R.

[0117] In the schematic diagram of this embodiment, the connection between the first side 1111 and the second side 1112 is an arc shape. The center O is the intersection of the extension line of the first side 1111 and the extension line of the second side 1112, and the center O is located outside the first side 1111 and the second side 1112. When the connection between the first side 1111 and the second side 1112 is a right angle, the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 is located on the first side 1111 and on the second side 1112.

[0118] The orthographic projection of the second feeding point P2 on the floor 111 is located in the current weak point area 110a, and is located in a circular area with the intersection as the center O and 1 / 16 of the wavelength of the second target frequency band as the radius. It can be seen that the current weak point area 110a where the orthographic projection of the second feeding point P2 on the floor 111 is located is fan-shaped or fan-like.

[0119] When the current weak point area 110a is selected as an area with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center O and 1 / 16 of the wavelength of the second target frequency band as the radius, the current in the area is relatively weak. The orthographic projection of the second feeding point P2 on the floor 111 is set in the current weak point area 110a, which can further better excite the excitation current in the same extension direction of the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the first target frequency band.

[0120] Please read further Fig. 22 The floor 111 includes two first sides 1111 disposed opposite to each other, and two second sides 1112 disposed opposite to each other, the number of the current weak point areas 110a is four, the positive projection of the second feeding point P2 on the floor 111 is located in any one of the four current weak point areas 110a, and the radiator 120 is adjacent to the current weak point area 110a disposed at the second feeding point P2.

[0121] In this embodiment, the number of the current weak area 110a is four, and the orthographic projection of the second feeding point P2 on the floor 111 can be located in any one of the four current weak area 110a, which makes the setting of the second feeding point P2 more flexible. The second feeding point P2 of the radiator 120 is set in the current weak area 110a where the orthographic projection of the second feeding point P2 on the floor 111 is located. For the convenience of description, the current weak areas 110a are named as current weak area 110a (1), current weak area 110a (2), current weak area 110a (3) and current weak area 110a (4). In this embodiment, the orthographic projection of the second feeding point P2 on the floor 111 is located in the current weak area 110a (1) as an example for illustration. Accordingly, the radiator 120 is set adjacent to the current weak area 110a (1).

[0122] In summary, the second feed source S2 is connected to the radiator 120 by means of conductive springs or screws and other conductive parts, and the connection position can be an open end of the radiator 120 (the first open end 121 in this embodiment). The second feed source S2 can be set in the current weak point area 110a, so that the longitudinal current distribution of the floor 111 with a high proportion can be satisfied. Specifically, the orthographic projection of the second feeding point P2 on the floor 111 is located in the current weak point area 110a, and is located in a circular area with the intersection as the center and 1 / 16 of the wavelength of the second target frequency band as the radius.

[0123] In another embodiment, the floor 111 further has a current weak point area 110 a , wherein the current weak point area 110 a of the floor 111 is close to or overlaps with the current strong point area 12 c of the radiator 120 .

[0124] Since the second feeding point P2 is located in the current strong point area 12c of the radiator 120 supporting the first target frequency band, the mutual influence between the second target frequency band supported by the antenna assembly 10 and the first target frequency band supported by the antenna assembly 10 can be small or even no influence. When the current weak point area 110a of the floor 111 is close to or overlaps with the current strong point area 12c of the radiator 120, the positive projection of the second feeding point P2 on the floor 111 falls on the current weak point area 110a of the floor 111, or falls near the current weak point area 110a of the floor 111. When the positive projection of the second feeding point P2 on the floor 111 falls on the current weak point area 110a of the floor 111, or falls near the current weak point area 110a of the floor 111, the radiator 120 can be used as a radiation driving device to drive the floor 111, which becomes the excitation condition for the floor 111 to work in the second target frequency band, and the energy proportion of the radiator 120 is very small. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10. In other words, the size of the radiator 120 is small.

[0125] See also Fig.24 and Fig.25 , Fig.24 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig.25 Schematic diagram of an antenna assembly with an inductive device to reduce the size of the radiator. Fig.25 (a) is a schematic diagram of the antenna assembly 10 without the inductive device 130;

[0126] Fig.25 (b) is a schematic diagram of an antenna assembly 10 provided with an inductive device 130. The antenna assembly 10 includes an inductive device 130. One end of the inductive device 130 is electrically connected to the second feed source S2, and the other end of the inductive device 130 is electrically connected to the second feed point P2. Fig.25 visible, Fig.25 In (b), the length of the radiator 120 of the antenna assembly 10 including the inductive device 130 is smaller.

[0127] In this embodiment, one end of the inductive device 130 in the antenna assembly 10 is electrically connected to the second feed source S2, and the other end is electrically connected to the second feeding point P2, which is equivalent to the second feed source S2 connecting the inductive device 130 in series to the second feeding point P2 of the radiator 120.

[0128] It should be noted that the so-called inductive device 130 refers to a device that exhibits inductive characteristics within the second target frequency band supported by the antenna assembly 10. The inductive device 130 may include at least one of the following: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel, as long as the inductive device 130 exhibits inductive characteristics within the second target frequency band supported by the antenna assembly 10.

[0129] Due to the antenna assembly 10 provided in the embodiment of the present application, the orthographic projection of the second feeding point P2 on the floor 111 is located in the current weak point area 110a of the characteristic mode of the floor 111, which can better excite the excitation current in the same extension direction as the first side 1111. The floor 111 constitutes the main radiation branch of the second target frequency band and contributes most of the radiation of the antenna assembly 10, while the radiator 120 is equivalent to acting as a radiation driving device for the entire antenna assembly 10, becoming the excitation condition for the floor 111 to work in the second target frequency band, and the energy proportion of the radiator 120 is very small. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10. Fig.25 It can also be seen that the size of the radiator 120 in the antenna assembly 10 provided with the inductive device 130 is smaller.

[0130] The inductive device 130 can compensate for the insufficiency of the inductive property caused by the miniaturization of the radiator 120 , so that the antenna assembly 10 has better antenna performance in the second target frequency band, and the antenna assembly 10 can work better in the second target frequency band.

[0131] In this embodiment, the electrical length L of the radiator 120 satisfies: Wherein, λ2 is the wavelength of the electromagnetic wave signal in the second target frequency band.

[0132] In this embodiment, the frequency of the first target frequency band is greater than the frequency of the second target frequency band, and therefore, the electrical length of the radiator 120 is determined by the second target frequency band.

[0133] The radiator 120 is open-circuited at both ends. The length of the radiator 120 refers to the length of the extension path between the first open end 121 and the second open end 122, that is, the sum of the physical length of the first radiating arm 120a and the physical length of the second radiating arm 120b. Considering the need for miniaturization of the radiator 120, the electrical length of the radiator 120 is Select less than or equal to At the same time, it is considered that if the physical length of the induction device 130 replacing the radiator 120 is too large, more energy loss will be introduced. Therefore, the electrical length of the radiator 120 is selected as In summary, the electrical length of the radiator 120 provided in the embodiment of the present application is satisfy: On the one hand, the size of the radiator 120 can be made smaller, and on the other hand, the antenna assembly 10 can have smaller energy loss when supporting the second target frequency band.

[0134] It should be noted that the electrical length L of the radiator 120 satisfies the following formula:

[0135] Wherein, L is the physical length of the radiator 120, a is the transmission time of the electromagnetic wave signal of the second target frequency band in the medium, and b is the transmission time of the electromagnetic wave signal of the second target frequency band in the free space. For example, when the radiator 120 is an MDA radiator 120, that is, the outside of the radiator 120 is wrapped by a plastic medium, then the medium is plastic.

[0136] See also Fig.26 , Fig.26 A schematic diagram of the partial structure of an antenna assembly provided in one embodiment of the present application. In the antenna assembly 10 shown in this embodiment, related components such as the first feed source S1 are omitted. The inductive device 130 includes an inductor 130a. The inductor 130a can be a single inductor, or it can be a series inductor formed by a plurality of inductors connected in series. When the inductor 130a includes a series inductor formed by a plurality of inductors connected in series, one end of the series inductor is electrically connected to the second feeding point P2, and the other end of the series inductor is electrically connected to the second feed source S2. In the schematic diagram of the present embodiment, the inductive device 130 includes an inductor 130a for illustration. The antenna assembly 10 provided in one embodiment is described in detail below. Please refer to Fig. 27 , Fig. 27A partial structural schematic diagram of an antenna assembly provided for one embodiment of the present application. The inductive device 130 includes N+1 inductors 130a. The N+1 inductors 130a are connected in series to form a series inductor, one end of the series inductor is electrically connected to the second feed point P2, and the other end of the series inductor is electrically connected to the second feed source S2. Two adjacent inductors 130a in the series inductor are connected and have a connection point. It can be seen that the N+1 inductors 130a are connected in series to form a series inductor, and the N+1 inductors 130a have N connection points. Correspondingly, the antenna assembly 10 also includes a switch unit 150, and the switch unit 150 has a common terminal 151 (also called RFC) and N ports 152 (also called RFX, wherein X refers to the number of other ports 152 in the switch unit 150 except RFC, and when the switch unit 150 is SPNT, X is T in SPNT). One end of the common terminal 151 is electrically connected to the second feed source S2, and the common terminal 151 can be electrically connected to at least one of the N ports 152. The port 152 is electrically connected to the connection point, and different ports 152 are electrically connected to different connection points. In other words, the connection point of two adjacent inductors 130a is electrically connected to one port 152 of the N ports 152, and different connection points are electrically connected to different ports 152. When the common terminal 151 is electrically connected to different ports 152 of the N ports 152, or the common terminal 151 is disconnected from the N ports 152, the inductance value of the series inductance is different, so that the operating frequency bands in the second target frequency band supported by the antenna assembly 10 are different. It should be noted that the N ports 152 of the switch unit 150 described here are not all the ports 152 in the switch unit 150, but refer to the ports 152 connected to the connection point between two adjacent inductors 130a in the N+1 inductors 130a.

[0137] In this embodiment, N≥1, and N is a positive integer. The antenna assembly 10 provided in this embodiment, through the switch unit 150 and N+1 inductors 130a, the common end 151 is electrically connected to different ports 152, or the common end 151 is electrically connected to the N ports 152, so that the inductance value of the series inductor is different, and thus the operating frequency of the second target frequency band supported by the antenna assembly 10 is different. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can support more operating frequency bands and has better communication performance.

[0138] The antenna assembly 10 provided in a specific embodiment of the present application is introduced below. The N ports 152 include a first end 1521 (also referred to as RF1) and a second end 1522 (also referred to as RF2). The N+1 inductors 130a include a first inductor L1, a second inductor L2, and a third inductor L3. One end of the first inductor L1 is electrically connected to the second feed point P2, and the other end is electrically connected to the first end 1521. One end of the second inductor L2 is electrically connected to the other end of the first inductor L1, and the other end of the second inductor L2 is electrically connected to the second end 1522. One end of the third inductor L3 is electrically connected to the other end of the second inductor L2, and the other end of the third inductor L3 is electrically connected to the second feed source S2 and the common end 151. When the common terminal 151 is electrically connected to the first terminal 1521, the antenna assembly 10 supports a first frequency band in the second target frequency band; when the common terminal 151 is electrically connected to the second terminal 1522, the antenna assembly 10 supports a second frequency band in the second target frequency band. When the common terminal 151 is electrically disconnected from the first terminal 1521 and the common terminal 151 is electrically disconnected from the second terminal 1522, the antenna assembly 10 supports a third frequency band in the second target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, and the frequency of the second frequency band is greater than the frequency of the third frequency band.

[0139] It can be understood that in the schematic diagram of this embodiment, N=2 is used as an example for illustration. It can be understood that this should not be understood as a limitation on the embodiments of the present application. In other embodiments, N can also be equal to 1, or 3, or 4, etc., as long as N≥1 is satisfied and N is a positive integer.

[0140] When the common end 151 is electrically connected to the first end 1521, and the common end 151 is electrically disconnected from the second end 1522, it is equivalent to that the second inductor L2 and the third inductor L3 are both short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the second feed source S2 is electrically connected to the second feeding point P2 is the inductance value of the first inductor L1, and the first frequency band supported by the antenna assembly 10 is the frequency band with the highest frequency in the second target frequency band.

[0141] When the common end 151 is electrically connected to the second end 1522, and the common end 151 is electrically disconnected from the first end 1521, it is equivalent to that the third inductor L3 is short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the second feed source S2 is electrically connected to the second feeding point P2 is the sum of the inductance value of the first inductor L1 and the inductance value of the second inductor L2. The second frequency band supported by the antenna assembly 10 is a frequency band in the middle of the second target frequency band.

[0142] When the common terminal 151 is electrically disconnected from the first terminal 1521, and the common terminal 151 is also electrically disconnected from the second terminal 1522, the first inductor L1, the second inductor L2, and the third inductor L3 are not short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the second feed source S2 is electrically connected to the second feeding point P2 is the sum of the inductance values ​​of the first inductor L1, the second inductor L2, and the third inductor L3. The third frequency band supported by the antenna assembly 10 is the lowest frequency band in the second target frequency band.

[0143] The switch unit 150 may be, but is not limited to, a single-pole four-throw switch (SP4T) or a single-pole double-throw switch (SPDT). The antenna assembly 10 provided in this embodiment realizes the switching of any one of the first frequency band, the second frequency band and the third frequency band in the second target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0144] In one implementation, the second target frequency band is a low frequency band, the first frequency band is a B8 frequency band, the second frequency band is a B20 frequency band, and the third frequency band is a B28 frequency band.

[0145] In addition, the switch unit 150 also includes other ports 152 (including at least one) and other inductors 130a (including at least one), and the other ports 152 are electrically connected to the corresponding inductors 130a to the ground. When the common terminal 151 is electrically connected to the other ports 152, the inductors 130a electrically connected to the other ports 152 are connected in parallel to the path between the second feed source S2 and the second feed point P2, so as to fine-tune the frequency band supported by the antenna assembly 10 (for example, the frequency band between the third frequency band and the first frequency band). Later, the two embodiments in which the switch unit 150 also includes the third terminal 1523 and the inductive device 130 also includes the fourth inductor L4, and the switch unit 150 includes the third terminal 1523, the fourth terminal 1524, the fourth inductor L4 and the fifth inductor L5 will be described in detail.

[0146] For further information, see Fig.28 , Fig.28A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include two ports 152, namely a first end 1521 and a second end 1522. The N+1 inductors 130a include three inductors 130a, namely a first inductor L1, a second inductor L2 and a third inductor L3. The first end 1521 (also referred to as RF1), the second end 1522 (also referred to as RF2), the first inductor L1, the second inductor L2 and the third inductor L3 can refer to the previous description, which will not be repeated here. Further, in this embodiment, the switch unit 150 also has a third end 1523 (also referred to as RF3). Correspondingly, the inductive device 130 also includes a fourth inductor L4. One end of the fourth inductor L4 is electrically connected to the third end 1523, and the other end of the fourth inductor L4 is grounded. When the common terminal 151 is electrically connected to the second terminal 1522 and the common terminal 151 is electrically connected to the third terminal 1523, the antenna assembly 10 supports a fourth frequency band, wherein the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band. It should be noted that the port 152 of the N ports 152 included in the switch unit 150 mentioned above refers to the port 152 connected to the connection point of two adjacent inductors 130a in the N+1 inductors 130a forming the series inductance. The third terminal 1523 is not connected to the connection point of two adjacent inductors 130a in the N+1 inductors 130a forming the series inductance. Therefore, the third terminal 1523 here does not belong to one of the N ports 152 included in the switch unit 150 when the inductive device 130 includes N+1 inductors 130a mentioned above.

[0147] The inductive device 130 also includes the fourth inductor L4, and the fourth inductor L4 is used to perform fine-tuning on the basis of the first frequency band, the second frequency band and the third frequency band. For example, when the common terminal 151 is electrically connected to the second terminal 1522, and the common terminal 151 is electrically connected to the third terminal 1523, it is equivalent to connecting the fourth inductor L4 to the ground in parallel on the basis of the antenna component 10 supporting the second frequency band, thereby fine-tuning the second frequency band supported by the antenna component 10 to the fourth frequency band, and completing the switching of the fourth frequency band. In one embodiment, the frequency of the fourth frequency band is greater than the frequency of the second frequency band, therefore, the inductive device 130 also includes the fourth inductor L4 which can pull the second frequency band supported by the antenna component 10 up to the fourth frequency band, and completing the switching of the fourth frequency band. In one embodiment, the fourth frequency band partially overlaps with the second frequency band, and the other part is different.

[0148] The antenna assembly 10 provided in the embodiment of the present application can support more operating frequencies and have better communication performance by setting the fourth inductor L4.

[0149] In this implementation, the second frequency band is the B20 frequency band, and the fourth frequency band is the B5 frequency band.

[0150] For further information, see Fig.29 , Fig.29 A partial structural diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521 (also referred to as RF1), a second end 1522 (also referred to as RF2) and a third end 1523 (also referred to as RF3). The N+1 inductors 130a include a first inductor L1, a second inductor L2 and a third inductor L3. The inductive device 130 also includes a fourth inductor L4. The first end 1521, the second end 1522, the third end 1523, the first inductor L1, the second inductor L2, the third inductor L3 and the fourth inductor L4 can refer to the previous description and will not be repeated here.

[0151] Further, in this embodiment, the switch unit 150 also has a fourth end 1524 (also referred to as RF4). Correspondingly, the inductive device 130 also includes a fifth inductor L5. One end of the fifth inductor L5 is electrically connected to the fourth end 1524, and the other end of the fifth inductor L5 is electrically connected to the ground. When the common end 151 is electrically disconnected from the fourth end 1524, and when the antenna assembly 10 supports a corresponding frequency band in the second target frequency band, the antenna assembly 10 supports a transmission frequency band of the corresponding frequency band, wherein the corresponding frequency band includes any one of the first frequency band, the second frequency band and the third frequency band. When the common end 151 is electrically connected to the fourth end 1524, the antenna assembly 10 supports a reception frequency band of the corresponding frequency band in the second target frequency band. It should be noted that the port 152 of the N ports 152 included in the switch unit 150 mentioned above refers to the port 152 connected to the connection point of two adjacent inductors 130a in the N+1 inductors 130a forming the series inductance. However, the fourth end 1524 is not connected to the connection point of two adjacent inductors 130a in the N+1 inductors 130a forming the series inductance. Therefore, the fourth end 1524 here does not belong to one of the N ports 152 included in the switch unit 150 when it is mentioned above that the inductive device 130 includes N+1 inductors 130a.

[0152] The corresponding frequency bands in the second target frequency band (for example, the first frequency band, the second frequency band, and the third frequency band) include a transmitting frequency band and a receiving frequency band, and the frequency of the transmitting frequency band in the corresponding frequency band is slightly different from the frequency of the receiving frequency band. Generally speaking, the frequency of the receiving frequency band in the corresponding frequency band is higher than the frequency of the transmitting frequency band in the corresponding frequency band. For example, the first frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the first frequency band is higher than the frequency of the transmitting frequency band in the first frequency band; the second frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the second frequency band is higher than the frequency of the transmitting frequency band in the second frequency band; the third frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the third frequency band is higher than the frequency of the transmitting frequency band in the third frequency band.

[0153] When the common terminal 151 (also called RFC) is electrically disconnected from the fourth terminal 1524, and the antenna assembly 10 supports the corresponding frequency band in the second target frequency band, the antenna assembly 10 supports the transmitting frequency band in the corresponding frequency band; when the common terminal 151 is electrically connected to the fourth terminal 1524, the antenna assembly 10 supports the receiving frequency band of the corresponding frequency band in the second target frequency band. Thus, the receiving frequency band and the transmitting frequency band of the first frequency band can be switched, the receiving frequency band and the transmitting frequency band of the second frequency band can be switched, and the transmitting frequency band and the receiving frequency band of the third frequency band can be switched, so that the antenna assembly 10 has better performance when supporting the receiving frequency band and the transmitting frequency band of the corresponding frequency band.

[0154] It should be noted that, in this embodiment, the status of the third end 1523 and the fourth end 1524 are equivalent. When the common end 151 is electrically connected to the third end 1523, the frequency band supported by the antenna assembly 10 can be fine-tuned, and can also be used to fine-tune the specific frequency of the frequency band supported by the antenna assembly 10. Correspondingly, in this embodiment, when the common end 151 is electrically connected to the fourth end 1524, the frequency band supported by the antenna assembly 10 can be fine-tuned); it can also be used to fine-tune the specific frequency in the frequency band supported by the antenna assembly 10. In this embodiment, the frequency band supported by the antenna assembly 10 is adjusted when the common end 151 is electrically connected to the third end 1523 as an example for explanation, and the frequency of the frequency band supported by the antenna assembly 10 is fine-tuned when the common end 151 is electrically connected to the third end 1523 as an example for explanation, which should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. It can be understood that in one embodiment, the corresponding frequency bands in the second target frequency band supported by the antenna assembly 10 (for example, the first frequency band, the second frequency band, and the third frequency band) are frequency division duplex (FDD), and the transmitting frequency band and the receiving frequency band in the corresponding frequency band are different.

[0155] See also Fig.30 , Fig.30 A partial structural diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521 and a second end 1522. The N+1 inductors 130a include a first inductor L1, a second inductor L2, and a third inductor L3. In addition, the switch unit 150 also includes a third end 1523 and a fourth end 1524, and correspondingly, the inductive device 130 also includes a fourth inductor L4 and a fifth inductor L5. The first end 1521, the second end 1522, the third end 1523, the fourth end 1524, the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, and the fifth inductor L5, etc., can refer to the previous description and will not be repeated here. It should be noted that the N ports 152 include two ports 152, namely the first end 1521 and the second end 1522, and the N ports 152 do not include the third end 1523 and the fourth end 1524. Accordingly, the N+1 inductors 130a include the first inductor L1, the second inductor L2 and the third inductor L3, and the N+1 inductors 130a do not include the fourth inductor L4 and the fifth inductor L5.

[0156] Further, in the present embodiment, the inductive device 130 also includes a matching improvement inductor L6, one end of which is electrically connected to the second feed source S2, and the other end of which is grounded. In the present embodiment, one end of the matching improvement inductor L6 is electrically connected to one end of the second feed source S2 electrically connected to the second feed point P2. Specifically, in the embodiment, one end of the matching improvement inductor L6 is electrically connected to the connection point between the second feed source S2 and the third inductor L3, and the other end of the matching improvement inductor L6 is grounded. It can be understood that the N+1 inductors 130a include the first inductor L1, the second inductor L2 and the third inductor L3, and the N+1 inductors 130a do not include the fourth inductor L4, the fifth inductor L5 and the matching improvement inductor L6.

[0157] The matching improvement inductor L6 can improve the matching state of the antenna assembly 10, so that when the antenna assembly 10 supports each frequency band, the output impedance of the second feed source S2 and the input impedance of the radiator 120 are relatively matched, so that the energy of the excitation signal output by the second feed source S2 is more loaded to the radiator 120, so that the antenna performance of the antenna assembly 10 is better. Since the size of the radiator 120 is small and the size of the floor 111 is large, the matching improvement inductor L6 can make the radiator 120 and the floor 111 relatively matched, and then make the output impedance of the second feed source S2 and the input impedance of the radiator 120 relatively matched when the antenna assembly 10 supports each frequency band of the second target frequency band, so that the energy of the excitation signal output by the second feed source S2 is more loaded to the radiator 120, so that the antenna performance of the antenna assembly 10 is better.

[0158] It can be understood that in this embodiment, the inductive device 130 includes the matching improved inductor L6 combined with the N+1 inductors 130a including the first inductor L1, the second inductor L2 and the third inductor L3, and the inductive device 130 also includes the fourth inductor L4 and the fifth inductor L5. It can be understood that it should not be understood as a limitation on the embodiment of the present application. In other embodiments, the inductive device including the matching improved inductor L6 can be independent of the embodiment in which the N+1 inductors 130a include the first inductor L1, the second inductor L2 and the third inductor L3, and the inductive device 130 also includes the fourth inductor L4 and the fifth inductor L5. In other words, in other embodiments, in which the inductive device includes the matching improvement inductor L6, the antenna component 10 may not include the N+1 inductors 130a, and the N+1 inductors 130a may not include the first inductor L1, the second inductor L2, and the third inductor L3, and the inductive device 130 may not include the fourth inductor L4 and the fifth inductor L5.

[0159] It can be seen that the second feed source S2 and the inductive device 130 are equivalent to direct-fed inductive excitation for the radiator 120. One end of the inductive device 130 is electrically connected to the second feed source S2, and the other end of the inductive device 130 is electrically connected to the second feeding point P2 of the radiator 120, which is equivalent to the inductive device 130 being connected in series between the second feed source S2 and the radiator 120. The inductive device 130 provides inductive compensation for the antenna assembly 10, thereby miniaturizing the radiator 120. The switch unit 150 uses SP4T, and the common end 151 of the switch unit 150 and two of its ports 152 (RF port 152, i.e., the first end 1521 and the second end 1522) have different connection points of the inductor 130a (i.e., connected in a stepped manner). The total inductance value on the feeding path from the second feed source S2 to the radiator 120 is controlled by the switch unit 150, and the other two ports 152 (the third end 1523 and the fourth end 1524) of the switch unit 150 are connected to the ground by other inductors (the third end 1523 is electrically connected to the fourth inductor L4, and the fourth end 1524 is electrically connected to the fifth inductor L5), so as to achieve fine adjustment of the frequency, so as to achieve switching between adjacent frequency bands, such as switching from the B20 band to the B5 band, or to achieve switching of the receiving band and the transmitting band of the corresponding frequency band in the second target frequency band.

[0160] In addition, in the antenna assembly 10 provided in the embodiment of the present application, the switch unit 150 adopts a step-by-step access switch usage method, which can reduce the additional loss caused by the switch.

[0161] At least one of the first inductor L1, the second inductor L2 and the third inductor L3 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel.

[0162] For example, the first inductor L1 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. As long as the first inductor L1 has an inductance characteristic within the second target frequency band supported by the antenna assembly 10, it is sufficient.

[0163] The second inductor L2 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. As long as the second inductor L2 has an inductance characteristic within the second target frequency band supported by the antenna assembly 10, it is sufficient.

[0164] The third inductor L3 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. As long as the third inductor L3 has an inductance characteristic within the second target frequency band supported by the antenna assembly 10, it is sufficient.

[0165] It should be noted that when the inductive device 130 further includes a fourth inductor L4, the fourth inductor L4 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. It is sufficient that the fourth inductor L4 has an inductance characteristic within the second target frequency band supported by the antenna assembly 10.

[0166] When the inductive device 130 further includes a fifth inductor L5, the fifth inductor L5 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. It is sufficient that the fifth inductor L5 has an inductance characteristic within the second target frequency band supported by the antenna assembly 10.

[0167] When the inductive device 130 further includes a matching improvement inductor L6, the matching improvement inductor L6 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. It is sufficient that the matching improvement inductor L6 has an inductance characteristic within the second target frequency band supported by the antenna assembly 10.

[0168] To summarize, the common end 151 and two of the ports 152 of the switch unit 150 in the antenna assembly 10 provided in the embodiment of the present application are connected to the series inductor 130 in a stepped manner, and the total inductance of the feeding path is controlled by switching on and off; the other two ports 152 are connected to the ground by connecting the additional inductor 130 to fine-tune the frequency to achieve switching of adjacent frequency bands, such as switching from the B20 band to the B5 band, or adjusting the transmission band or the receiving band TRX of the corresponding frequency band supported by the antenna assembly 10. In this embodiment, the series inductive device 130 of the path is a first inductor L1, a second inductor L2 and a third inductor L3, the first end 1521 is connected between the first inductor L1 and the second inductor L2, the second end 1522 is connected between the second inductor L2 and the third inductor L3, the common end 151 is connected between the third inductor L3 and the feeding port 152, the third end 1523 is connected to the ground of the fourth inductor L4, the fourth end 1524 is connected to the ground of the fifth inductor L5, and the matching improvement inductor L6 is connected as a parallel inductive device 130 after all the series inductive devices 130 and connected to the port 152 and grounded to improve the matching state of the path.

[0169] The on or off state of the port 152 (also called RFX (X is 1, 2, 3, 4)) in the following description refers to the on and off state of the RFX port 152 and the common terminal 151 (also called RFC). When RF1 is on and other RFs are off, it is equivalent to the second inductor L2 and the third inductor L3 being short-circuited by RF1. At this time, the series inductance value on the path is the first inductor L1, which should correspond to the highest low-frequency frequency band, such as the B8 frequency band; when RF2 is on and other RFs are off, it is equivalent to the third inductor L3 being short-circuited by RF2. At this time, the series inductance value on the path is the first inductor L1 + the second inductor L2, which should correspond to the middle low-frequency frequency band, such as the B20 frequency band; when all RFs are off, it is equivalent to all series inductive devices 130 not being short-circuited. At this time, the series inductance value on the path is the first inductor L1 + the second inductor L2 + the third inductor L3, which should correspond to the lowest low-frequency frequency band, such as the B28 frequency band. RF3 and RF4 can fine-tune the frequencies of the above-mentioned frequency bands. For example, when RF2 and RF3 are connected (that is, the common end 151 is connected to RF2, and the common end 151 is connected to RF3), it is equivalent to connecting the fourth inductor L4 to the ground in parallel on the basis of the above-mentioned B20 frequency band, which can increase the B20 frequency to the B5 frequency band and complete the switching of the B5 frequency band state; at the same time, in the B8 frequency band, B20 frequency band, and B28 frequency band states, RF4 can also be connected to perform TRX frequency switching for their respective states to improve RX performance.

[0170] Next, taking the first frequency band as the B8 frequency band, the second frequency band as the B20 frequency band, the third frequency band as the B28 frequency band, and the fourth frequency band as the B5 frequency band as an example, a method for determining the inductance values ​​of the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5, and the matching improvement inductor L6 in the antenna assembly 10 provided in an embodiment of the present application is described.

[0171] The antenna assembly 10 provided in this embodiment can be switched from 700MHz to 960MHz to complete the coverage of various frequency bands in the low frequency band. The specific setting can first make the common end 151 and the first end 1521 electrically connected separately (also called the first end 1521 is turned on separately), and the antenna assembly 10 works in the first frequency band (the B8 frequency band in this embodiment), thereby determining the inductance value of the first inductor L1 and the inductance value of the matching improvement inductor L6. The common end 151 and the second end 1522 are electrically connected separately (also called the second end 1522 is turned on separately), and the antenna assembly 10 works in the second frequency band (the B20 frequency band in this embodiment), thereby determining the inductance value of the second inductor L2. Then the common terminal 151 is disconnected from all ports 152 (the first terminal 1521, the second terminal 1522, the third terminal 1523 and the fourth terminal 1524 in this case) (All off), and the antenna assembly 10 operates in the third frequency band (the B28 frequency band in this embodiment), thereby determining the inductance value of the third inductor L3. Then the common terminal 151 is electrically connected to the second terminal 1522 and the common terminal 151 is electrically connected to the third terminal 1523, and the antenna assembly 10 supports the fourth frequency band, thereby determining the inductance value of the fourth inductor L4. The transmission and reception (TRX) performance optimization status of each frequency band of the first frequency band, the second frequency band, the third frequency band and the fourth frequency band can be debugged according to the needs of the actual project to determine the inductance value of the fifth inductor L5.

[0172] In addition, according to the foregoing introduction, in the antenna assembly 10 provided in the embodiment of the present application, the floor 111 of the circuit board 110 constitutes the main radiation branch of the second target frequency band, contributing most of the radiation of the antenna assembly 10, and the radiator 120 is equivalent to acting as a radiation driving device for the entire antenna assembly 10, becoming the excitation condition for the floor 111 to work in the second target frequency band, and the energy of the radiator 120 accounts for a very small proportion. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10. The following will compare the antenna assembly 10 that does not adopt the embodiment of the present application and the antenna assembly 10 provided in the embodiment of the present application (the size of the radiator 120 is smaller than that of the radiator 120 that does not adopt the embodiment of the present application).

[0173] Please also read Fig.31 , Fig.31 Schematic diagram of an antenna assembly that does not adopt the embodiment of the present application and an antenna assembly provided by the embodiment of the present application. Fig.31 (a) is a schematic diagram of the length of the radiator when the antenna assembly 10 that does not adopt the embodiment of the present application supports the low frequency band; Fig.31 (b) is a schematic diagram of the length of the radiator when the antenna assembly 10 according to the embodiment of the present application does not support the WiFi frequency band; Fig.31 (c) is the antenna assembly 10 provided in the embodiment of the present application. The antenna assembly 10 that does not adopt the embodiment of the present application adopts the radiator 120 as the main radiating arm of the antenna assembly 10, which is a composite left-right-handed transmission line (CRLH) solution. When the antenna assembly 10 supports the low-frequency band, the length L1 of the radiator 120 is 40 mm; when the other radiating branches of the original antenna assembly 10 support the WiFi band, the length L1' of the radiating branches is 21.6 mm (for example, the first radiating arm 120a is 7.3 mm, and the second radiating arm 120b is 14.3 mm). Therefore, the total length of the radiator 120 and the radiating branches supporting the low-frequency band and the WiFi band is 40 mm + 21.6 mm = 61.6 mm. In the antenna assembly 10 provided in the embodiment of the present application, the floor 111 is the main radiating arm of the second target frequency band, the length of the first radiating arm 120a of the radiator 120 is 16.8mm, and the length L2 of the second radiating arm 120b (i.e., the cross arm) of the radiator 120 is 16.2mm, that is, the length of the radiator 120 in the embodiment of the present application is 33mm. It is smaller than the length L1 of the radiator 120 in the antenna assembly 10 that does not adopt the embodiment of the present application, that is, L2<L1+L1'. Specifically, the length of the radiator 120 of the antenna assembly 10 provided in the embodiment of the present application is 20mm, which is 50% smaller than the size of the radiator 120 that only supports the low-frequency band of the antenna assembly 10 that does not adopt the embodiment of the present application. Please refer to Fig.32 , Fig.32The figure is a schematic diagram comparing the system efficiency of each frequency band in the free space of the second target frequency band supported by the antenna assembly of the present application and the antenna assembly of the present application without adopting the implementation scheme of the present application. Among them, the English name of free space is Free Space, which is abbreviated as FS in the figure, and the system efficiency of free space is abbreviated as FS efficiency. The second target frequency band is a low frequency band, and the B8 band, B5 band and B28 band of the low frequency band are compared. Among them, the performance of the antenna assembly 10 provided in the implementation scheme of the present application in the B28 band is better than the performance of the antenna assembly 10 in the B28 band not using the implementation scheme of the present application, and the system efficiency of free space is improved by about 1.5dB. In addition, the performance of the antenna assembly 10 provided in the implementation scheme of the present application in the B8 band is not much different from the antenna performance of the antenna assembly 10 in the B8 band not using the implementation scheme of the present application; accordingly, the performance of the antenna assembly 10 provided in the implementation scheme of the present application in the B5 band is not much different from the antenna performance of the antenna assembly 10 in the B5 band not using the implementation scheme of the present application. In addition, it can be seen from this figure that when the first target frequency band is the WiFi frequency band, the WiFi 2.4G frequency band and the WiFi 5G frequency band in the first target frequency band are compared, wherein the FS efficiency of the antenna assembly 10 provided in the embodiment of the present application in the WiFi2.4G frequency band and the WiFi 5G frequency band is not much different. Furthermore, when the radiator 120 of the antenna assembly 10 provided in the embodiment of the present application supports the WiFi 2.4G frequency band, due to the balance of the current mode of the WiFi 2.4G frequency band (that is, the radiator 120 supports the WiFi 2.4G frequency band as a balanced mode) and orthogonal characteristics, its radiation pattern tends to be omnidirectional, with a directivity of 3.15dBi, which is about 1.7dBi lower than the directivity of 4.85dBi of the antenna in the scheme not adopting the embodiment of the present application in the WiFi 2.4G frequency band (that is, the directivity is reduced by 35%). Therefore, the antenna assembly 10 provided in the embodiment of the present application has better omnidirectionality when supporting the WiFi 2.4G frequency band, thereby ensuring that the antenna assembly 10 supports all-round transmission and reception when supporting the WiFi 2.4G frequency band. It can be understood that when the antenna assembly 10 provided in the embodiment of the present application supports the WiFi 5G frequency band, the omnidirectionality is better than that of the antenna in the embodiment of the present application when it supports the WiFi 5G frequency band, thereby ensuring that the antenna assembly 10 supports all-round transmission and reception when the WiFi 5G frequency band is used.

[0174] See also Fig.33 , Fig.33A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The antenna assembly 10 also includes a switch unit 150. The switch unit 150 has a common terminal 151 and N ports 152, one end of the common terminal 151 is electrically connected to the second feed source S2, and the common terminal 151 can be electrically connected to at least one of the N ports 152. The inductive device 130 includes a first inductor L1 and N inductors 130a. One end of the first inductor L1 is electrically connected to the second feed source S2, and the other end is electrically connected to the second feed point P2. One end of the inductor 130a is electrically connected to the second feed point P2, and the other end of the inductor 130a is electrically connected to the port 152, and different inductors 130a are electrically connected to different ports 152. When the common terminal 151 is electrically connected to different ports 152, or the common terminal 151 is disconnected from the N ports 152, the inductance value of the inductive device 130 is different, so that the operating frequency bands in the second target frequency band supported by the antenna assembly 10 are different. It should be noted that the port 152 of the N ports 152 of the switch unit 150 refers to the port 152 connected to the inductor 130a, not all the ports 152 in the switch unit 150.

[0175] In this embodiment, N≥1, and N is a positive integer. The antenna assembly 10 provided in this embodiment, through the switch unit 150, the first inductor L1 and the N inductors 130a, the common end 151 is electrically connected to different ports 152, or the common end 151 is disconnected from the N ports 152, so that the operating frequency of the second target frequency band supported by the antenna assembly 10 is different. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can support more operating frequency bands and has better communication performance.

[0176] It should be noted that the common terminal 151 being disconnected from the N ports 152 means that the common terminal 151 is disconnected from any one of the N ports 152 .

[0177] The antenna assembly 10 provided in a specific embodiment of the present application is introduced below. The N ports 152 include a first end 1521, a second end 1522 and a third end 1523. The N inductors 130a include a second inductor L2, a third inductor L3 and a fourth inductor L4. One end of the second inductor L2 is electrically connected to the second feeding point P2, and the other end is electrically connected to the first end 1521. One end of the third inductor L3 is electrically connected to the second feeding point P2, and the other end is electrically connected to the second end 1522. One end of the fourth inductor L4 is electrically connected to the second feeding point P2, and the other end is short-connected to the third end 1523. When the common end 151 is electrically connected to different ports 152 among the N ports 152, the antenna assembly 10 can support different frequency bands in the second target frequency band. In this embodiment, when the common terminal 151 is electrically connected to different ports 152 among the first terminal 1521, the second terminal 1522, and the third terminal 1523, the antenna assembly 10 can support different frequency bands in the second target frequency band. As for the size of the frequency band supported by the antenna assembly 10 when the common terminal 151 is electrically connected to different ports 152 among the N ports 152, it is related to the values ​​of the first inductor L1, the second inductor L2, the third inductor L3, and the fourth inductor L4. When the common terminal 151 is electrically disconnected from the N ports 152, when the antenna assembly 10 supports the second target frequency band, the path between the second feed source S2 and the second feeding point P2 has the first inductor L1. At this time, for the second target frequency band, the inductance value connected to the path is the largest and the frequency is the lowest. When the common terminal 151 is electrically connected to a port 152 among the N ports 152, the inductor 130a connected to the corresponding port 152 is connected in parallel with the first inductor L1, and the inductance value after parallel connection is less than the inductance value of the first inductor L1. When the common terminal 151 is electrically connected to different ports 152 among the N ports 152, the frequency band when the antenna component 10 supports the second target frequency band is related to the size of the inductor 130a. For example, in one embodiment, when the common terminal 151 is electrically connected to the third terminal 1523, the antenna component 10 supports the first frequency band among the second target frequency band. When the common terminal 151 is electrically connected to the first terminal 1521, the antenna component 10 supports the second frequency band among the second target frequency band. When the common end 151 is electrically disconnected from the first end 1521 , the common end 151 is electrically disconnected from the second end 1522 , and the common end 151 is electrically disconnected from the third end 1523 , the antenna assembly 10 supports the third frequency band in the second target frequency band.When the common end 151 is electrically connected to the second end 1522, the antenna assembly 10 supports a fourth frequency band in the second target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, the frequency of the second frequency band is greater than the frequency of the third frequency band, and the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band. In one embodiment, the frequency of the fourth frequency band may be greater than the frequency of the second frequency band. It can be understood that this embodiment is only an example and is not a limitation on the frequency size of each frequency band (first frequency band, second frequency band, third frequency band and fourth frequency band) when the antenna assembly 10 supports the second target frequency band.

[0178] It can be understood that in the schematic diagram of this embodiment, N=3 is used as an example for illustration. It can be understood that this should not be understood as a limitation on the embodiments of the present application. In other embodiments, N can also be equal to 1, or 2, or 4, etc., as long as N≥1 is satisfied and N is a positive integer.

[0179] When the common terminal 151 is electrically connected to the third terminal 1523, the inductance value of the inductive device 130 connected in series on the path from the second feed source S2 to the radiator 120 is an equivalent value of the first inductor L1 and the fourth inductor L4 connected in parallel, and the equivalent value is less than the inductance value of the first inductor L1. At this time, the antenna assembly 10 is designed to support the fourth frequency band in the second target frequency band, such as the B5 frequency band.

[0180] When the common end 151 is electrically connected to the first end 1521, the inductance of the inductive device 130 connected in series on the path from the second feed source S2 to the radiator 120 is an equivalent value of the first inductor L1 and the second inductor L2 connected in parallel, and the equivalent value is less than the inductance of the first inductor L1. At this time, a frequency band in the middle of the second target frequency band will be supported, named the second frequency band, for example, the B20 frequency band. It should be noted that the size of the second frequency band supported by the antenna assembly 10 and the size of the fourth frequency band supported by the antenna assembly 10 are related to the size of the second inductor L2 and the fourth inductor L4. When the second frequency band is the B20 frequency band and the fourth frequency band is the B5 frequency band, the fourth frequency band is greater than the second frequency band. At this time, the inductance of the fourth inductor L4 is less than the inductance of the second inductor L2.

[0181] When the common terminal 151 is electrically disconnected from the first terminal 1521, the common terminal 151 is electrically disconnected from the second terminal 1522, and the common terminal 151 is electrically disconnected from the third terminal 1523, the inductance value of the inductive device 130 connected in series on the path from the second feed source S2 to the radiator 120 is the first inductance L1, corresponding to the lowest frequency band in the second target frequency band, named the third frequency band, for example, the B28 frequency band. It can be understood that when the antenna assembly 10 supports the third frequency band, when the switch unit 150 also includes other ports 152, the common terminal 151 is also electrically disconnected from the port 152.

[0182] When the common end 151 is electrically connected to the second end 1522, the perception of the inductive device 130 in series on the path from the second feed source S2 to the radiator 120 is the equivalent value of the first inductance L1 and the third inductance L3, and the equivalent value is smaller than the inductance value of the first inductance L1. According to the needs of various working frequency bands supported by the second target frequency band, it is designed as a higher frequency band, named the fourth frequency band, for example, the B5 frequency band.

[0183] It can be understood that the antenna assembly 10 provided in the embodiment of the present application can also be designed through multiple passes to obtain that the antenna assembly 10 supports other frequency bands in the second target frequency band. For example, the common end 151 is electrically connected to the first end 1521, the common end 151 is electrically connected to the second end 1522, and the common end 151 is also electrically connected to the third end 1523, so that the antenna assembly 10 supports other frequency bands a (which can be named the fifth frequency band) in the second target frequency band. In other embodiments, the common end 151 is also electrically connected to any two of the first end 1521, the second end 1522 and the third end 1523, so that the antenna assembly 10 also supports other frequency bands in the second target frequency band. For example, when the common end 151 is electrically connected to the first end 1521 and the common end 151 is also electrically connected to the second end 1522, the antenna assembly 10 supports other frequency bands b (which can be named the sixth frequency band) in the second target frequency band; when the common end 151 is electrically connected to the first end 1521 and the common end 151 is also electrically connected to the third end 1523, the antenna assembly 10 supports other frequency bands c (which can be named the seventh frequency band) in the second target frequency band; when the common end 151 is electrically connected to the second end 1522 and the common end 151 is also electrically connected to the third end 1523, the antenna assembly 10 supports other frequency bands d (which can be named the eighth frequency band) in the second target frequency band.

[0184] The switch unit 150 may be, but is not limited to, a single-pole triple-throw switch (SP3T). The antenna assembly 10 provided in this embodiment realizes the switching of any one of the first frequency band, the second frequency band and the third frequency band in the second target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0185] In one implementation, the second target frequency band is a low frequency band, the first frequency band is a B8 frequency band, the second frequency band is a B20 frequency band, the third frequency band is a B28 frequency band, and the fourth frequency band is a B5 frequency band.

[0186] See also Fig.34 , Fig.34 A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521, a second end 1522 and a third end 1523. The N inductors 130a include a second inductor L2, a third inductor L3 and a fourth inductor L4. One end of the second inductor L2 is electrically connected to the second feeding point P2, and the other end is electrically connected to the first end 1521. One end of the third inductor L3 is electrically connected to the second feeding point P2, and the other end is electrically connected to the second end 1522. One end of the fourth inductor L4 is electrically connected to the second feeding point P2, and the other end is short-connected to the third end 1523. When the common end 151 is electrically connected to the third end 1523, the antenna assembly 10 supports the first frequency band in the second target frequency band. When the common end 151 is electrically connected to the first end 1521, the antenna assembly 10 supports the second frequency band in the second target frequency band. When the common terminal 151 is electrically disconnected from the first terminal 1521, the common terminal 151 is electrically disconnected from the second terminal 1522, and the common terminal 151 is electrically disconnected from the third terminal 1523, the antenna assembly 10 supports the third frequency band in the second target frequency band. When the common terminal 151 is electrically connected to the second terminal 1522, the antenna assembly 10 supports the fourth frequency band in the second target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, the frequency of the second frequency band is greater than the frequency of the third frequency band, and the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band. In one embodiment, the frequency of the fourth frequency band may be greater than the frequency of the second frequency band.

[0187] Further, the switch unit 150 also has a fourth end 1524. The inductive device 130 also includes a fifth inductor L5. One end of the fifth inductor L5 is electrically connected to the fourth end 1524, and the other end of the fifth inductor L5 is electrically connected to the ground. When the common end 151 is electrically disconnected from the fourth end 1524, and when the antenna assembly 10 supports a corresponding frequency band in the second target frequency band, the antenna assembly 10 supports a transmission frequency band of the corresponding frequency band, wherein the corresponding frequency band includes any one of the first frequency band, the second frequency band and the third frequency band. When the common end 151 is electrically connected to the fourth end 1524, the antenna assembly 10 supports a reception frequency band of the corresponding frequency band in the second target frequency band. It should be noted that the port 152 of the N ports 152 of the switch unit 150 refers to the port 152 connected to the inductor 130a, not all the ports 152 in the switch unit 150. The N ports 152 include a first end 1521 , a second end 1522 , and a third end 1523 . The fourth end 1524 is not electrically connected to the inductor 130 a . Therefore, the fourth end 1524 does not belong to the aforementioned N ports 152 .

[0188] The corresponding frequency bands in the second target frequency band (for example, the first frequency band, the second frequency band, and the third frequency band) include a transmitting frequency band and a receiving frequency band, and the frequency of the transmitting frequency band in the corresponding frequency band is slightly different from the frequency of the receiving frequency band. Generally speaking, the frequency of the receiving frequency band in the corresponding frequency band is higher than the frequency of the transmitting frequency band in the corresponding frequency band. For example, the first frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the first frequency band is higher than the frequency of the transmitting frequency band in the first frequency band; the second frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the second frequency band is higher than the frequency of the transmitting frequency band in the second frequency band; the third frequency band includes a transmitting frequency band and a receiving frequency band, and the frequency of the receiving frequency band in the third frequency band is higher than the frequency of the transmitting frequency band in the third frequency band.

[0189] When the common end 151 is electrically disconnected from the fourth end 1524, and the antenna assembly 10 supports the corresponding frequency band in the second target frequency band, the antenna assembly 10 supports the transmitting frequency band in the corresponding frequency band; when the common end 151 is electrically connected to the fourth end 1524, the antenna assembly 10 supports the receiving frequency band of the corresponding frequency band in the second target frequency band, thereby realizing the switching of the receiving frequency band and the transmitting frequency band of the first frequency band, the switching of the receiving frequency band and the transmitting frequency band of the second frequency band, and the switching of the transmitting frequency band and the receiving frequency band of the third frequency band, so that the antenna assembly 10 has better performance when supporting the receiving frequency band and the transmitting frequency band of the corresponding frequency band.

[0190] In this implementation, the second frequency band is the B20 frequency band, and the fourth frequency band is the B5 frequency band.

[0191] See also Fig.35 , Fig.35 A partial structural diagram of an antenna assembly provided for another embodiment of the present application. The N ports 152 include a first end 1521, a second end 1522, and a third end 1523. The N inductors 130a include a second inductor L2, a third inductor L3, and a fourth inductor L4. The switch unit 150 also has a fourth end 1524. The inductive device 130 also includes a fifth inductor L5. Please refer to the previous description for the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5, and the switch unit 150, etc., which will not be repeated here.

[0192] In this embodiment, the inductive device 130 further includes a matching improvement inductor L6 , one end of which is electrically connected to the second feed source S2 , and the other end of which is grounded.

[0193] The matching improvement inductor L6 can improve the matching state of the antenna assembly 10, so that when the antenna assembly 10 supports each frequency band of the second target frequency band, the output impedance of the second feed source S2 and the input impedance of the radiator 120 are relatively matched, so that the energy of the excitation signal output by the second feed source S2 is more loaded to the radiator 120, so that the antenna performance of the antenna assembly 10 is better. Since the size of the radiator 120 is small and the size of the floor 111 is large, the matching improvement inductor L6 can make the radiator 120 and the floor 111 relatively matched, and then make the output impedance of the second feed source S2 and the input impedance of the radiator 120 relatively matched when the antenna assembly 10 supports each frequency band of the second target frequency band, so that the energy of the excitation signal output by the second feed source S2 is more loaded to the radiator 120, so that the antenna performance of the antenna assembly 10 is better.

[0194] It can be understood that in this embodiment, the inductive device 130 includes the matching improved inductor L6 combined with the inductive device 130 including the first inductor L1, the N inductors 130a including the second inductor L2, the third inductor L3 and the fourth inductor L4, and the inductive device 130 also includes the fifth inductor L5 as an example for illustration, and it can be understood that it should not be understood as a limitation on the embodiment of the present application. In other embodiments, the inductive device 130 including the matching improved inductor L6 can be independent of the embodiment in which the inductive device 130 includes the first inductor L1, the N inductors 130a include the second inductor L2, the third inductor L3 and the fourth inductor L4, and the inductive device 130 also includes the fifth inductor L5. In other words, in other embodiments, the inductive device includes the matching improved inductor L6, the inductive device 130 does not include the first inductor L1, the N inductors 130a do not include the second inductor L2, the third inductor L3 and the fourth inductor L4, and the inductive device 130 does not include the fifth inductor L5.

[0195] In summary, in the antenna assembly 10 provided in the embodiment of the present application, the common terminal 151 (RFC) and each port 152 are connected in parallel before and after the permanent series inductance device 130 of the path, and the total inductance value of the feeding path is controlled by switching on and off; in addition, the RF port 152 can also be connected to the ground by connecting an additional inductance device 130, so as to fine-tune the frequency and achieve the switching of adjacent frequency bands, such as switching from the B20 band to the B5 band, or switching the TRX of a single band. Fig.35For example, the permanent series inductive device 130 of the path is the first inductor L1, the first end 1521, the second end 1522, and the third end 1523 are respectively connected to the second inductor L2, the third inductor L3, and the fourth inductor L4 of the inductive device 130, and connected between the first inductor L1 and the antenna, the RFC is connected between the first inductor L1 and the feeding port 152, the fourth end 1524 is connected to the ground after being connected to the fifth inductor L5, and the matching improved inductor L6 is connected to the port 152 after all the series inductive devices 130, and is grounded to improve the path matching state. The on or off state of the port 152 (also called RFX (X is 1, 2, 3, 4)) in the following description refers to the on-off state of the port 152 and the common terminal 151 (also called RFC). Specifically, (1) when the common terminal 151 and each port 152 in the switch unit 150 are not connected, the inductance value connected in series on the path is the first inductance L1, which corresponds to the lowest frequency band of the low frequency, such as the B28 frequency band; (2) when the first terminal 1521 is connected, the inductance value connected in series on the path is the equivalent inductance value of the first inductance L1 and the second inductance L2 connected in parallel, which is smaller than the first inductance L1, so it corresponds to a frequency band closer to the middle of the low frequency, such as the B20 frequency band; (3) when the second terminal 1522 is connected, the inductance value connected in series on the path is the equivalent inductance value of the first inductance L1 and the third inductance L3 connected in parallel, and according to the working frequency band requirements, it can be designed to be in a higher frequency band, the second inductance L2, the third inductance L3, and the fourth inductance L4, such as the B5 frequency band; similarly, (4) when the third terminal 1523 is connected, it can be designed to be in the B8 frequency band. Of course, a multi-pass design is also possible, such as passing through the first end 1521, the second end 1522 and the third end 1523 at the same time to obtain more working states. The fourth end 1524 can be used to fine-tune the frequency of the above frequency band.

[0196] In summary, the antenna assembly 10 designed in the embodiment of the present application is also called a CCE radiation unit, which includes a feeding device and a radiator 120, and the two ends of the radiator 120 are in an open circuit state. The feeding device includes a feeding port 152, an antenna switch (i.e., the switch unit 150 described above), an antenna matching and a resonance path 170 (also called an LC resonance circuit). The antenna matching is located between the feeding port 152 and the electrical connection element connected to the radiator 120, which is usually a series inductive device 130 (for example, a first inductor L1, a second inductor L2, and a third inductor L3) and then a parallel inductive device 130 (for example, a fourth inductor L4, a fifth inductor L5, and a matching improvement inductor L6). The relative order of the CCE radiation unit is an electrical connection device (such as a spring or a screw), a resonance path 170 (also called an LC resonance circuit), a series inductive device 130, a parallel inductive device 130, and a feeding port 152.

[0197] The inductive device 130 connected in series provides inductive compensation for the radiating unit, so that the radiating unit can reach the electrical length required by the second target frequency band, thereby playing a role in miniaturization. The inductive device 130 can be a single inductor, or a plurality of inductors connected in parallel or in series, or a series-parallel form of a capacitor and an inductor, as long as it is finally inductive within the working frequency band. At the same time, there are usually three inductive devices 130 connected in series, corresponding to three different frequency bands of the second target frequency band, for example, the first frequency band (such as the B8 frequency band), the second frequency band (such as the B20 frequency band), and the third frequency band (such as the B28 frequency band), and the first frequency band, the second frequency band and the third frequency band in the second target frequency band are switched through the antenna switch. The switch unit 150 can be, but is not limited to, a single-pole four-throw switch (SP4T). The antenna assembly 10 provided in this embodiment realizes the switching of any one of the first frequency band, the second frequency band and the third frequency band in the second target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0198] In summary, the electronic device 1 provided in the embodiment of the present application applies the miniaturized antenna solution in the top area of ​​the electronic device 1 with a tight layout, and sets the second feeding point P2 of the radiator 120 in the current weak point area 110a of the mainboard with a relatively small current (for example, the upper right corner area of ​​the back view), and connects to the radiator 120 through a conductive member (such as a spring or a screw) in a direct feeding manner. The two ends of the radiator 120 are open-circuited, and the second feeding point P2 can be connected to the open end at the top (for example, the first open end 121) through a conductive member. The radiator 120 extends downward from the open end in the vertical direction of the whole machine, with a length of about 20 mm, to form a second open end 122. Through the switch assembly introduced above, it is possible to switch from 700 MHz to 960 MHz to complete the coverage of each frequency band of the second target frequency band.

[0199] To sum up, compared with using different radiation branches to support the first target frequency band and the second target frequency band, in the antenna assembly 10 provided in one embodiment of the present application, the radiator 120 can support both the first target frequency band and the second target frequency band, so that the size of the radiator 120 is reduced.

[0200] Furthermore, the second feeding point P2 is located in the current strong point area 12c where the radiator 120 supports the first target frequency band, so that the mutual influence between the second target frequency band supported by the antenna component 10 and the first target frequency band supported by the antenna component 10 is small or even no influence.

[0201] Furthermore, the first feed source S1 is capacitively connected to the second feed point P2, which can excite the radiator 120 to support the balanced mode of the first target frequency band. In addition, the radiator 120 includes a first radiating arm 120a and a second radiating arm 120b connected by bending, and the current can be orthogonal in coordination with the balanced mode, so that the transverse current component and the longitudinal current component of the current in the electronic device 1 are more balanced, so that the directivity of the antenna assembly 10 when supporting the second target frequency band is reduced. For example, the directivity of the antenna assembly 10 when supporting the WiFi frequency band is reduced by about 35%.

[0202] In addition, in the antenna assembly 10 provided in one embodiment of the present application, the radiator 120 is excited to generate a first resonant mode and a second resonant mode, wherein the first resonant mode is used to support a first operating frequency band of the first target frequency band, and the second resonant mode is used to support a second operating frequency band of the first target frequency band. In one embodiment, the first operating frequency band is a WiFi 2.4G frequency band, and the second operating frequency band is a WiFi 5G frequency band, so that the antenna assembly 10 can ensure simultaneous coverage of the WiFi 2.4G frequency band and the WiFi 5G frequency band.

[0203] In addition, the antenna assembly 10 provided in one embodiment of the present application starts from the characteristic mode current distribution of the floor 111 (for example, it can be the ground of the main board), and feeds the current weak point area 110a (that is, the small current point area) of the floor 111 through the CCE method, thereby fully stimulating the longitudinal current of the floor 111 (that is, when the length of the first side 1111 is greater than the length of the second side 1112, the current along the extension direction of the first side 1111), thereby improving the free space efficiency of the second target frequency band.

[0204] In addition, the antenna assembly 10 provided in one embodiment of the present application shares a radiator 120 for the first target frequency band and the second target frequency band, and through the reasonable setting of the position of the second feeding point P2, ensures the miniaturization of its own CCE method excitation (that is, using CCE feeding to miniaturize the size of the radiator 120 when supporting the second target frequency band), and ensures that when switching between the various frequency bands of the second target frequency band supported by the radiator 120, the first target frequency band is not affected.

[0205] In addition, in one embodiment, the radiator 120 further includes an inductive device 130, one end of which is electrically connected to the second feed source S2, and the other end of which is electrically connected to the second feeding point P2, that is, the inductive device 130 connected in series is used to compensate for the inductance of the antenna assembly 10, so that the size of the radiator 120 is reduced. The radiator 120 supporting the first target frequency band and the second target frequency band is shared by the inductive device 130, so that the space utilization rate of the antenna assembly 10 can be reduced by about 50% compared with the conventional solution. In addition, the second feeding point P2 is located in the current strong point area 12c of the radiator 120 supporting the first target frequency band, so that the mutual influence between the second target frequency band supported by the antenna assembly 10 and the first target frequency band supported by the antenna assembly 10 is small, or even no influence.

[0206] Also, please see Fig.36 and Fig.37 , Fig.36 A schematic diagram of an antenna assembly provided in an embodiment of the present application switching various frequency bands supporting a second target frequency band through a switch unit; Fig.37 An embodiment of the present application provides an S parameter diagram of a first target frequency band when an antenna assembly switches the frequency bands supporting the second target frequency band through a switch unit. In this embodiment, the first target frequency band is a WiFi frequency band and the second target frequency band is a low frequency band. Fig.36 In the figure, curve ① is the S parameter curve of the B5 frequency band, curve ② is the S parameter curve of the B8 frequency band, curve ③ is the S parameter curve of the B20 frequency band, and curve ④ is the S parameter curve of the B28 frequency band. Fig.36 It can be seen that the antenna assembly 10 provided in the embodiment of the present application also provides a switch unit 150 in various embodiments, which can ensure full-band switching when the second target frequency band is a low-frequency band. Fig.37 In the figure, curve ① is the S parameter curve of the WiFi band when the antenna assembly 10 supports the B5 band and the B8 band, curve ② is the S parameter curve of the WiFi band when the antenna assembly 10 supports the B20 band, and curve ③ is the S parameter curve of the WiFi band when the antenna assembly 10 supports the B28 band. Fig.37 It can be seen that when the switch unit 150 is switched, the S parameter of the WiFi frequency band supported by the antenna assembly 10 does not change substantially.

[0207] In addition, the embodiment of the present application further provides an electronic device 1. The electronic device 1 includes but is not limited to mobile phones, telephones, televisions, tablet computers (Pad), cameras, personal computers, laptop computers (Personal Computer, PC), vehicle-mounted devices, headphones, watches, wearable devices, base stations, vehicle-mounted radars, customer premise equipment (Customer Premise Equipment, CPE), large-screen terminals and other devices that can send and receive electromagnetic wave signals. In this application, the electronic device 1 is taken as a mobile phone as an example, and other devices can refer to the specific description in this application. In addition, the electronic device 1 can be, but is not limited to, a device with or without a display screen.

[0208] The electronic device 1 includes an antenna assembly 10 as provided in any of the above embodiments. The radiator 120 in the antenna assembly 10 may be, but is not limited to, a metal frame, MDA, FPC, LDS, etc. Fig.38 , Fig.38 A three-dimensional schematic diagram of an electronic device provided in one embodiment. The electronic device 1 also includes a device body 30. The antenna assembly 10 is carried by the device body 30. The device body 30 includes but is not limited to a display screen 310 and a 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 the circuit board 110 inside the shell 330 of the electronic device 1, and the radiator 120 can be formed on the edge of the middle frame 320.

[0209] The radiator 120 may be located at any one of the four corners of the electronic device 1, such as 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.

[0210] 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.

[0211] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device comprises a floor and an antenna assembly, wherein the floor comprises a first side and a second side which are bent and connected; The antenna assembly comprises: A radiator, the radiator comprising a first radiating arm and a second radiating arm connected in a bent manner, the first radiating arm being arranged adjacent to the first side, the second radiating arm being arranged adjacent to the second side, the first radiating arm having a first open-circuit end, the second radiating arm having a second open-circuit end, and the radiator further having a first feeding point and a second feeding point; a first feed source, the first feed source being capacitively connected to the first feed point to excite the radiator to support a first target frequency band; and A second feed source, the second feed source is electrically connected to the second feed point to excite the radiator to support a second target frequency band, wherein the second feed point is located in a current strong point area where the radiator supports the first target frequency band.

2. The electronic device according to claim 1, wherein: The length of the first side is greater than the length of the second side, and the first feeding point is located at the first open end.

3. The electronic device according to claim 2, characterized in that: The first open end has an end face away from the second radiating arm, and a distance d1 between the first feeding point and the end face satisfies: Among them, λ1 is the wavelength corresponding to the center frequency point of the first target frequency band.

4. The electronic device according to claim 1, wherein: The radiator is excited to generate a first resonance mode and a second resonance mode, wherein the first resonance mode is used to support a first operating frequency band of the first target frequency band, and the second resonance mode is used to support a second operating frequency band of the first target frequency band.

5. The electronic device according to claim 4, characterized in that: The first resonance mode is a half-wavelength balanced mode of the radiator, and the second resonance mode is a three-quarter-wavelength mode of the radiator.

6. The electronic device according to claim 5, characterized in that: The first working frequency band is the WiFi 2.4G frequency band, and the second working frequency band is the WiFi 5G frequency band.

7. The electronic device according to claim 1, wherein: The physical length L of the first radiating arm AB The physical length L of the second radiating arm Bc satisfy:

8. The electronic device according to claim 1, wherein: The current strong point region has the strongest current point when supporting the first target frequency band, and the distance d2 between the second feeding point and the strongest current point satisfies: Among them, λ1 is the wavelength corresponding to the center frequency point of the first target frequency band.

9. The electronic device according to claim 8, characterized in that: The floor further has a current weak point area, wherein the current weak point area of ​​the floor is close to or overlaps with the current strong point area of ​​the radiator.

10. The electronic device according to claim 1, wherein: The orthographic projection of the second feeding point on the floor is also located in the current weak point area of ​​the floor.

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

12. The electronic device according to claim 11, characterized in that: The inductive device comprises: A matching improvement inductor, one end of which is electrically connected to the second feed source, and the other end of which is grounded.

13. The electronic device according to claim 11, characterized in that: The inductive device comprises: N+1 inductors, wherein the N+1 inductors are connected in series to form a series inductor, one end of the series inductor is electrically connected to the second feeding point, and the other end of the series inductor is electrically connected to the second feed source, two adjacent inductors are connected to have a connection point, and the N+1 inductors have N connection points; The antenna assembly further includes a switch unit, the switch unit having a common end and N ports, one end of the common end is electrically connected to the second feed source, and the common end can be electrically connected to at least one of the N ports, the port is electrically connected to the connection point, and different ports are electrically connected to different connection points; When the common end is electrically connected to different ports, or the common end is electrically disconnected from the N ports, the inductance values ​​of the series inductors are different, so that the operating frequency bands in the second target frequency band supported by the antenna assembly are different.

14. The electronic device according to claim 13, characterized in that: The N ports include a first end and a second end; the N+1 inductors include: a first inductor, wherein one end of the first inductor is electrically connected to the second feeding point, and the other end of the first inductor is electrically connected to the first end; a second inductor, one end of the second inductor being electrically connected to the other end of the first inductor, and the other end of the second inductor being electrically connected to the second end; and a third inductor, one end of the third inductor being electrically connected to the other end of the second inductor, and the other end of the third inductor being electrically connected to the second feed source and the common end; When the common end is electrically connected to the first end, the antenna assembly supports a first frequency band in the second target frequency band; when the common end is electrically connected to the second end, the antenna assembly supports a second frequency band in the second target frequency band; when the common end is electrically disconnected from the first end and the common end is electrically disconnected from the second end, the antenna assembly supports a third frequency band in the second target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, and the frequency of the second frequency band is greater than the frequency of the third frequency band.

15. The electronic device according to claim 14, characterized in that: The second target frequency band is a low frequency band, the first frequency band is a B8 frequency band, the second frequency band is a B20 frequency band, and the third frequency band is a B28 frequency band.

16. The electronic device according to claim 14, characterized in that: The switch unit further has a third terminal, and the inductive device further includes: a fourth inductor, one end of the fourth inductor being electrically connected to the third end, and the other end of the fourth inductor being grounded; When the common end is electrically connected to the second end and the common end is electrically connected to the third end, the antenna assembly supports a fourth frequency band, wherein a frequency of the fourth frequency band is at least partially different from a frequency of the second frequency band.

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

18. The electronic device according to claim 14, characterized in that: The switch unit further has a fourth terminal, and the inductive device further includes: a fifth inductor, one end of the fifth inductor being electrically connected to the fourth end, and the other end of the fifth inductor being electrically connected to the ground; When the common end is electrically disconnected from the fourth end, and when the antenna assembly supports a corresponding frequency band in a second target frequency band, the antenna assembly supports a transmission frequency band of the corresponding frequency band, wherein the corresponding frequency band includes any one of the first frequency band, the second frequency band, and the third frequency band; When the common end is electrically connected to the fourth end, the antenna assembly supports a receiving frequency band of the corresponding frequency band in the second target frequency band.

19. The electronic device according to claim 11, characterized in that: The antenna assembly further includes a switch unit, the switch unit having a common end and N ports, one end of the common end is electrically connected to the second feed source, and the common end can be electrically connected to at least one of the N ports; The inductive device comprises: a first inductor, one end of which is electrically connected to the second feed source, and the other end of which is electrically connected to the second feed point; and N inductors, one end of each of the inductors is electrically connected to the second feeding point, the other end of each of the inductors is electrically connected to the port, and different inductors are electrically connected to different ports; When the common end is electrically connected to different ports, or the common end is electrically disconnected from the N ports, the inductance value of the inductive device is different, so that the operating frequency bands in the second target frequency band supported by the antenna assembly are different.

20. The electronic device according to claim 19, characterized in that The N ports include a first end, a second end, and a third end; the N inductors include: a second inductor, wherein one end of the second inductor is electrically connected to the second feeding point, and the other end of the second inductor is electrically connected to the first end; a third inductor, one end of the third inductor being electrically connected to the second feeding point, and the other end of the third inductor being electrically connected to the second end; a fourth inductor, one end of the fourth inductor being electrically connected to the second feeding point, and the other end of the fourth inductor being short-connected to the third end; When the common end is electrically connected to the third end, the antenna assembly supports a first frequency band in the second target frequency band; when the common end is electrically connected to the first end, the antenna assembly supports a second frequency band in the second target frequency band; when the common end is electrically disconnected from the first end, the common end is electrically disconnected from the second end, and the common end is electrically disconnected from the third end, the antenna assembly supports a third frequency band in the second target frequency band; when the common end is electrically connected to the second end, the antenna assembly supports a fourth frequency band in the second target frequency band, wherein the frequency of the first frequency band is greater than the frequency of the second frequency band, the frequency of the second frequency band is greater than the frequency of the third frequency band, and the frequency of the fourth frequency band is at least partially different from the frequency of the second frequency band.

21. The electronic device according to claim 20, characterized in that: The second target frequency band is a low frequency band, the first frequency band is a B8 frequency band, the second frequency band is a B20 frequency band, the third frequency band is a B28 frequency band, and the fourth frequency band is a B5 frequency band.

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

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