Electronic device

Abstract

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

Description

Technical Field

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

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

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

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

[0005] a radiator, the radiator having a first open end, a second open end and a feeding point, the radiator being spaced apart from the floor, and the feeding point being located at a current weak point area of ​​a characteristic mode current of the floor; and

[0006] A feed source is electrically connected to the feeding point, and excites the floor through the radiator to generate an excitation current in the same extension direction of the first side to support electromagnetic wave signals in a target frequency band.

[0007] In a second aspect, the present application provides an electronic device, the electronic device comprising an antenna assembly, the antenna assembly supporting a target frequency band, the antenna assembly comprising:

[0008] A floor, the floor comprising a first side and a second side that are bent and connected;

[0009] a radiator, the radiator having a feeding point, the feeding point being located within a region of the circuit board with a circle centering at an intersection of an extension line of the first side and an extension line of the second side and with a radius of 1 / 16 of a wavelength of the target frequency band; and

[0010] A feed source is electrically connected to the feed point and excites the floor through the radiator.

[0011] To summarize, the electronic device provided in the embodiment of the present application, the antenna assembly in the electronic device, the radiator is spaced apart from the floor, the feed source is arranged on the circuit board and the feeding point is located in the current weak point area of ​​the characteristic mode current of the floor, which can better excite the excitation current in the same extension direction along the first side, so that the antenna assembly has a higher radiation efficiency in the target frequency band, and therefore the electronic device has better communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0014] Figure 2 for Figure 1 A schematic diagram of a portion of the structure of an antenna assembly;

[0015] Figure 3 for Figure 2 A side view of a portion of the structure of an antenna assembly provided in;

[0016] Figure 4 A schematic diagram of current distribution of a dipole antenna and an antenna assembly provided in an embodiment of the present application;

[0017] Figure 5 A schematic diagram of the distribution of the characteristic current with the largest proportion of longitudinal current corresponding to the characteristic mode of the circuit board;

[0018] Figure 6 for Figure 5 A schematic diagram of a current weak point area and a current strong point area in a floor of a circuit board shown;

[0019] Figure 7 for Figure 1 A schematic diagram of the electric field weak spot area in the antenna assembly provided in;

[0020] Figure 8 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0021] Fig. 9 A schematic diagram of an antenna assembly in which a radiator is replaced by an inductive device;

[0022] Fig.10 A partial structural schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0023] Fig.11 A partial structural schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0024] Fig.12 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0025] Fig.13A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0026] Fig.14 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0027] Fig.15 for Fig.14 A schematic diagram of S parameter curves of various frequency bands of the target frequency band in the antenna assembly shown;

[0028] Fig.16 Schematic diagram of an antenna assembly that does not adopt the embodiment of the present application and an antenna assembly provided by the embodiment of the present application;

[0029] Fig.17 It is a schematic diagram comparing the system efficiency of each frequency band supported by an antenna assembly that does not adopt the implementation scheme of the present application and the antenna assembly of the present application in free space;

[0030] Fig.18 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0031] Fig.19 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0032] Fig. 20 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0033] Fig.21 for Fig. 20 A schematic diagram of the electric field weak spot area in the antenna assembly provided in;

[0034] Fig. 22 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0035] Fig.23 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0036] Fig.24 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application;

[0037] Fig.25 A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0038] Fig.26 A three-dimensional schematic diagram of an electronic device provided in one embodiment.

[0039] Description of main component numbers:

[0040] Electronic device 1, antenna assembly 10, circuit board 110, floor 111, first side 1111, second side 1112;

[0041] Radiator 120, first open end 121, second open end 122, feeding point P, feeding source S;

[0042] Inductive device 130, inductor 130a, first inductor L1, second inductor L2, first inductor L01, second inductor L02, third inductor L3, fourth inductor L4, fifth inductor L5, sixth inductor L6;

[0043] Switch unit 150, common terminal 151, port 152, first terminal 1521, second terminal 1522, third terminal 1523, fourth terminal 1524; electrical connector 160;

[0044] Device body 30 , display screen 310 , casing 330 . DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In addition, the reference to "embodiment" or "implementation method" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments or implementation methods may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] See also Figure 1 , Figure 2 , Figure 3 and Fig.26 , Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of a portion of the structure of an antenna assembly; Figure 3 for Figure 2 A side view of a portion of the structure of an antenna assembly provided in; Fig.26 1 is a three-dimensional schematic diagram of an electronic device provided in an embodiment. The present application embodiment provides an electronic device 1, wherein the electronic device 1 includes an antenna assembly 10. For convenience, a floor 111 is shown. Figure 2 Omitted Figure 1The antenna assembly 10 includes a floor 111, a radiator 120 and a feed source S. In one embodiment, the floor 111 of the antenna assembly 10 is the ground of the circuit board 110 in the electronic device 1, or the ground of the main board, or the ground of the circuit board and the ground of the main board. In this embodiment, the floor 111 is taken as an example to illustrate the ground of the circuit board 110. The floor 111 includes a first side 1111 and a second side 1112 connected by bending, wherein the length of the first side 1111 is greater than the length of the second side 1112. The radiator 120 has a first open end 121, a second open end 122 and a feeding point P, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111. The feed source S is electrically connected to the feeding point P to excite the floor 111 to generate an excitation current in the same extension direction of the first side 1111 to support electromagnetic wave signals in a target frequency band.

[0047] The floor 111 in the circuit board 110 may be, but is not limited to, a metal layer (e.g., a copper layer). A large piece of metal layer in the circuit board 110 usually constitutes the floor 111, also referred to as a ground electrode. It is understandable that the circuit board 110 also includes multiple insulating layers and multiple wiring layers. The floor 111 is usually sandwiched between two adjacent insulating layers. The wiring layer is also disposed between adjacent insulating layers, and the wiring layer and the floor are disposed with an insulating layer between them. Different wiring layers may be electrically connected through wires or metal through holes. It is understandable that the introduction of the circuit board 110 herein is only one case of the circuit board 110, and should not be understood as a limitation on the circuit board 110 provided in the embodiments of the present application.

[0048] 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.

[0049] 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.

[0050] In one embodiment, the floor 111 and the radiator 120 together form a dipole antenna, the floor 111 is a radiating arm of the dipole antenna, named as a first radiating arm, and the radiator 120 is another radiating arm of the dipole antenna, named as a second radiating arm. When the antenna assembly 10 is working, the floor 111 and the radiator 120 both participate in the work.

[0051] The radiator 120 can be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator 120, 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 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 designed with a metal middle frame.

[0052] It is understandable that the present application does not specifically limit the shape, structure and material of the radiator 120, and the shapes of the radiator 120 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the radiator 120 is in a strip shape, the present application does not limit the extension trajectory of the radiator 120, so the radiator 120 can extend in a straight line, a curve, a multi-stage bend, etc. The above-mentioned radiator 120 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with different widths such as a gradual width and a widened area.

[0053] The radiator 120 has two ends, both of which are not grounded. In other words, the radiator 120 is open-circuited at both ends, and therefore, the two ends are named as the first open-circuit end 121 and the second open-circuit end 122, respectively. The feeding point P is located at the first open-circuit end 121, or at the second open-circuit end 122, or between the first open-circuit end 121 and the second open-circuit end 122. When the feeding point P is located at the first open-circuit end 121 and the second open-circuit end 122, the feeding point P can be located at any position of the first open-circuit end 121 and the second open-circuit end 122. The antenna assembly 10 also includes an electrical connector 160 (see Figure 1 ), the feed source S is electrically connected to the feed point P through the electrical connector 160. The electrical connector 160 may be, but is not limited to, an elastic conductive sheet, or a conductive screw, etc.

[0054] The feed source S is electrically connected to the feed point P through the electrical connector 160 , so that the electrical connection between the feed source S and the feed point P can be realized, which is simple and easy.

[0055] Please also read Figure 4 , Figure 4 A schematic diagram of current distribution of a dipole antenna and an antenna assembly provided in an embodiment of the present application. Figure 4 (a) is a schematic diagram of current distribution of a dipole antenna; Figure 4 (b) is a schematic diagram of current distribution after one of the radiating arms in the dipole antenna is widened; Figure 4 (c) is a schematic diagram of current distribution after a radiating arm in a dipole antenna is widened; Figure 4 (d) is a schematic diagram of the current distribution of the antenna assembly provided in the embodiment of the present application. Figure 4 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.

[0056] 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 is equivalent to 1 / 4 of the wavelength of the low-frequency band. According to the basic principle of the dipole antenna, that is, the longitudinal current of the floor 111 is fully stimulated, the equivalent aperture of the dipole antenna can be increased and the efficiency can be improved. At the same time, the floor 111 in the antenna assembly 10 provided in the embodiment of the present application is an effective radiator (i.e., the first radiation arm). The lower the frequency of the 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 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.

[0057] 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 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 target frequency band is a low-frequency band, the excitation current (also called longitudinal current) in the same extension direction of the floor 111 along the first side 1111 can be fully stimulated, which can effectively improve the radiation efficiency of the antenna assembly 10. It can be understood that although the target frequency band is a low-frequency band as an example for explanation here, in other implementation manners, the 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 target frequency band.

[0058] The working principle of the antenna assembly 10 provided in the embodiment of the present application is described and explained below.

[0059] In this embodiment, the circuit board 110 is a main board. The characteristic mode is an inherent mode that characterizes the floor 111 of the circuit board 110. By analyzing the characteristic mode (also called characteristic mode) of the circuit board 110, the most suitable feeding position can be found according to the boundary conditions. The following is an example of the target frequency band supported by the antenna assembly 10 being a low-frequency band. The characteristic current with the largest proportion of the longitudinal current mode can be obtained by simulation. Please refer to Figure 5 and Figure 6 , Figure 5 A schematic diagram of the distribution of the characteristic current with the largest proportion of longitudinal current corresponding to the characteristic mode of the circuit board;

[0060] Figure 6 for Figure 5 The current distribution of the characteristic mode is mainly characterized by the sinusoidal behavior of the edge of the circuit board 110, which is represented by Figure 5 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 circuit board 110, can also be considered. The difference between the phase of the electric field distribution in the circuit board 110 and the phase of the current distribution is 90°. That is, the minimum value of the electric field distribution in the circuit board 110 is the same as the maximum value of the current distribution in the circuit board 110; conversely, the maximum value of the electric field distribution in the circuit board 110 is the same as the minimum value of the current distribution in the circuit board 110. Figure 5In the figure, the curve J next to the circuit board 110 is used to represent the current distribution of the circuit board 110, and the curve V is used to represent the voltage distribution of the floor 111 of the circuit board 110. Curve J shows that the current distribution of the floor 111 of the circuit board 110 is a sine distribution. It can be seen from curve J that the two ends of the floor 111 of the circuit board 110 are the places where the current is the smallest, and the middle position of the floor 111 of the circuit board 110 is the place where the current is the strongest. Curve V shows that the electric field distribution of the floor 111 of the circuit board 110 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 circuit board 110 (that is, the minimum electric field distribution of the circuit board 110) to excite the characteristic mode; or, a capacitive coupling element (CCE) can be placed at the minimum position of the characteristic mode current distribution of the circuit board 110 (that is, the maximum electric field distribution of the circuit board 110) to excite the characteristic mode. Please refer to Figure 6 ,exist Figure 6 In the figure, there is a current weak point area 110a of the characteristic mode current distribution of the floor 111 in the circuit board 110, and a current strong point area 110b of the characteristic mode current distribution of the floor 111 in the circuit board 110. 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 higher radiation efficiency, it is necessary to better excite the longitudinal current distribution of the floor 111 on the circuit board 110. It should be noted that, when using CCE feeding, in addition to setting the feeding point P at the minimum point of the characteristic mode current of the floor 111, other positions other than the minimum point of the characteristic mode current in the characteristic mode current weak point area 110a of the floor 111 can also be used. The so-called current weak point area 110a of the characteristic mode current of the floor 111 refers to the area including the minimum value of the characteristic mode current of the floor 111. 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 of the floor panel 111 .

[0061] In this embodiment, the radiator 120 is spaced apart from the floor 111 , so the radiator 120 excited by the feed source S serves as a radiation driving device to constitute a CCE.

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

[0063] In the antenna assembly 10 provided in the embodiment of the present application, the floor 111 constitutes the main radiation branch of the target frequency band, contributing 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 target frequency band, and the energy of the radiator 120 accounts for a very small proportion. Therefore, in this case, reducing the size of the radiator 120 has little effect on the overall radiation performance of the antenna assembly 10.

[0064] In summary, in the antenna assembly 10 provided in the embodiment of the present application, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111, which can well excite the excitation current in the same extension direction along the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the 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 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 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.

[0065] See also Figure 7 , Figure 7 for Figure 1 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 the radius R as 1 / 16 of the wavelength of the target frequency band.

[0066] In the schematic diagram of this embodiment, the connection between the first side 1111 and the second side 1112 is an arc shape. The center of the circle is the intersection of the extension line of the first side 1111 and the extension line of the second side 1112, and the center of the circle is located outside the first side 1111 and the second side 1112. When the connection between the first side 1111 and the second side 1112 is a right angle, the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 is located on the first side 1111 and on the second side 1112.

[0067] The orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a, and is located in a circular area with the intersection as the center and 1 / 16 of the wavelength of the target frequency band as the radius. It can be seen that the current weak point area 110a where the orthographic projection of the feeding point P on the floor 111 is located is fan-shaped or quasi-fan-shaped.

[0068] When the current weak point area 110a is selected as an area with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center and 1 / 16 of the wavelength of the target frequency band as the radius, the current in the area is relatively weak. The orthographic projection of the feeding point P on the floor 111 is set in the current weak point area 110a, which can further better excite the excitation current in the same extension direction of the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the target frequency band.

[0069] Please read further Figure 6 The floor 111 includes two first sides 1111 disposed opposite to each other, and two second sides 1112 disposed opposite to each other. The number of the current weak point areas 110a is four. The positive projection of the feeding point P on the floor 111 is located in any one of the four current weak point areas 110a, and the radiator 120 is adjacent to the current weak point area 110a disposed by the feeding point P.

[0070] In this embodiment, the number of the current weak area 110a is four, and the orthographic projection of the feeding point P on the floor 111 can be located in any one of the four current weak area 110a, which makes the setting of the feeding point P more flexible. The radiator 120 is arranged adjacent to the current weak area 110a where the orthographic projection of the feeding point P on the floor 111 is located. For the convenience of description, the current weak area 110a is named as current weak area 110a (1), current weak area 110a (2), current weak area 110a (3) and current weak area 110a (4). In this embodiment, the orthographic projection of the feeding point P on the floor 111 is located in the current weak area 110a (1) as an example for illustration, and accordingly, the radiator 120 is arranged adjacent to the current weak area 110a (1).

[0071] See also Figure 8 and Fig. 9 , Figure 8 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig. 9 Schematic diagram of an antenna assembly in which an inductive device replaces a radiator. Fig. 9 (a) is a schematic diagram of an antenna assembly without an inductive device; Fig. 9 (b) is a schematic diagram of an antenna assembly provided with an inductive device. The antenna assembly 10 includes an inductive device 130. One end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feed point P. Fig. 9 visible, Fig. 9 In (b), the length of the radiator of the antenna assembly 10 including the inductive device 130 is smaller.

[0072] In this embodiment, one end of the inductive device 130 in the antenna assembly 10 is electrically connected to the feed source S, and the other end is electrically connected to the feeding point P, which is equivalent to connecting the feed source S in series with the inductive device 130 to the feeding point P of the radiator 120.

[0073] It should be noted that the so-called inductive device 130 refers to a device that exhibits inductive characteristics within the 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 target frequency band supported by the antenna assembly 10.

[0074] Since the antenna assembly 10 provided in the embodiment of the present application has a positive projection of the feeding point P on the floor 111 located in the current weak point area 110a of the characteristic mode of the floor 111, it can better excite the excitation current in the same extension direction along the first side 1111. The floor 111 constitutes the main radiation branch of the 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 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. 9 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.

[0075] The inductive device 130 can make up 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 target frequency band, and the antenna assembly 10 can work better in the target frequency band.

[0076] The electrical length of the radiator 120 is satisfy: Wherein, λ is the wavelength of the electromagnetic wave signal in the target frequency band.

[0077] The radiator 120 is in an open-circuit state at both ends. The length of the radiator 120 refers to the length of the extension path between the first open-circuit end 121 and the second open-circuit end 122. Considering the need for miniaturization of the radiator 120, the electrical length of the radiator 120 is Select less than or equal to At the same time, considering that the physical length of the induction device 130 replacing the radiator 120 is too large, more energy is introduced.

[0078] 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 target frequency band.

[0079] It should be noted that the electrical length of the radiator 120 satisfies the following formula:

[0080] Wherein, L is the physical length of the radiator 120, a is the transmission time of the electromagnetic wave signal of the target frequency band in the radiator 120, and b is the transmission time of the electromagnetic wave signal of the target frequency band in free space.

[0081] See also Fig.10 , Fig.10 A schematic diagram of a partial structure of an antenna assembly provided in one embodiment of the present application. The inductive device 130 includes an inductor 130a. The inductor 130a may be a single inductor, or may be a series inductor formed by connecting a plurality of inductors in series. When the inductor 130a includes a series inductor formed by connecting a plurality of inductors in series, one end of the series inductor is electrically connected to the feed point P, and the other end of the series inductor is electrically connected to the feed source S. In the schematic diagram of this embodiment, the inductive device 130 includes an inductor 130a as an example for illustration.

[0082] The following is a detailed description of the antenna assembly 10 provided in one embodiment. Fig.11 , Fig.11 A partial structural schematic diagram of an antenna assembly provided for one embodiment of the present application. The antenna assembly 10 also includes a switch unit 150, and the switch unit 150 has a common terminal 151 and N ports 152. The inductive device 130 includes N+1 inductors 130a. The N+1 inductors 130a are connected in series to form a series inductor, one end of the series inductor is electrically connected to the feed point P, and the other end of the series inductor is electrically connected to the feed source S. Among them, the connection point of two adjacent inductors 130a is electrically connected to a first terminal 1521, and different connection points are electrically connected to different first terminals 1521. 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 series inductor is different, so that the operating frequency bands in the target frequency band supported by the antenna assembly 10 are different.

[0083] 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 inductors 130a, the common end 151 is electrically connected to different ports 152, or the common end 151 is electrically connected to the N ports 152, so that the inductance values ​​of the series inductors are different, and thus the operating frequencies of the target frequency bands supported by the antenna assembly 10 are different. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can support more operating frequency bands and has better communication performance.

[0084] The antenna assembly 10 provided in accordance with the specific implementation of the present application is introduced below. 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. One end of the first inductor L1 is electrically connected to the feed point P, and the other end is electrically connected to the first end 1521. One end of the second inductor L2 is electrically connected to the other end of the first inductor L1, and the other end of the second inductor L2 is electrically connected to the second end 1522. One end of the third inductor L3 is electrically connected to the other end of the second inductor L2, and the other end of the third inductor L3 is electrically connected to the feed source S and the common end 151. When the common end 151 is electrically connected to the first end 1521, the antenna assembly 10 supports the first frequency band in the target frequency band; when the common end 151 is electrically connected to the second end 1522, the antenna assembly 10 supports the second frequency band in the target frequency band. When the common end 151 is electrically disconnected from the first end 1521 and the common end 151 is electrically disconnected from the second end 1522, the antenna assembly 10 supports a third frequency band in the 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.

[0085] 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.

[0086] When the common terminal 151 is electrically connected to the first terminal 1521, and the common terminal 151 is electrically disconnected from the second terminal 1522, and when the switch unit 150 also includes other ports, and the common terminal 151 is also electrically disconnected from the other ports, it is equivalent to that the second inductor L2 and the third inductor L3 are both short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feeding point P is the inductance value of the first inductor L1, and the first frequency band supported by the antenna assembly 10 is the frequency band with the highest frequency in the target frequency band.

[0087] It can be understood that when the antenna assembly 10 supports the first frequency band, when the switch unit 150 further includes other ports, the common terminal 151 is also electrically disconnected from the port 152 .

[0088] When the common end 151 is electrically connected to the second end 1522, and the common end 151 is electrically disconnected from the first end 1521, it is equivalent to that the third inductor L3 is short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feeding point P is the sum of the inductance value of the first inductor L1 and the inductance value of the second inductor L2. The second frequency band supported by the antenna assembly 10 is a frequency band in the middle of the target frequency band.

[0089] It can be understood that when the antenna assembly 10 supports the second frequency band, when the switch unit 150 further includes other ports, the common terminal 151 is also electrically disconnected from the port 152 .

[0090] When the common terminal 151 is electrically disconnected from the first terminal 1521, and the common terminal 151 is also electrically disconnected from the second terminal 1522, the first inductor L1, the second inductor L2, and the third inductor L3 are not short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feed point P is the sum of the inductance values ​​of the first inductor L1, the second inductor L2, and the third inductor L3, and the third frequency band supported by the antenna assembly 10 is the lowest frequency band among the target frequency bands.

[0091] It can be understood that when the antenna assembly 10 supports the third frequency band, when the switch unit 150 further includes other ports, the common terminal 151 is also electrically disconnected from the port 152 .

[0092] The switch unit 150 may 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 target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0093] Understandably, based on Fig.11 In the architecture of the antenna assembly 10 shown, N≥1, and N is a positive integer. When the common terminal 151 is electrically connected to the first terminal 1521, and when the common terminal 151 is electrically connected to the second terminal 1522, the second inductor L2 and the third inductor L3 are both short-circuited, and the feed source S1 is electrically connected to the feeding point P through the first inductor L1.

[0094] In one implementation, the 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.

[0095] For further information, see Fig.12 , Fig.12A partial structural schematic diagram of an antenna assembly provided in another embodiment of the present application. The switch unit 150 also has a third terminal 1523. Correspondingly, the inductive device 130 also includes a fourth inductor L4. One end of the fourth inductor L4 is electrically connected to the third terminal 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 greater than the frequency of the second frequency band.

[0096] The inductive device 130 also includes the fourth inductor L4, which is used to perform fine-tuning based on 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 assembly 10 supporting the second frequency band, thereby raising the second frequency band supported by the antenna assembly 10 to the fourth frequency band, and completing the switching of the fourth frequency band.

[0097] 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.

[0098] In this implementation, the second frequency band is the B20 frequency band, and the fourth frequency band is the B5 frequency band.

[0099] For further information, see Fig.13 , Fig.13 A partial structural schematic diagram of an antenna assembly provided for another embodiment of the present application. The switch unit 150 also has a fourth end 1524. 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 electrode. 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 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 target frequency band.

[0100] The corresponding frequency bands in the 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.

[0101] When the common terminal 151 is electrically disconnected from the fourth terminal 1524, and the antenna assembly 10 supports the corresponding frequency band in the 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 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.

[0102] See also Fig.14 , Fig.14 A partial structural diagram of an antenna assembly provided in another embodiment of the present application. The inductive device 130 further includes a sixth inductor L6, one end of the sixth inductor L6 is electrically connected to the connection point between the feed source S and the third inductor L3, and the other end of the sixth inductor L6 is grounded.

[0103] The sixth inductor L6 can improve the matching state of the antenna assembly 10, so that when the antenna assembly 10 supports various frequency bands, the output impedance of the feed source S and the common input impedance of the first radiation arm and the second radiation arm are more matched, so that the energy of the excitation signal output by the feed source S is more loaded to the first radiation arm and the second radiation arm, so that the antenna performance of the antenna assembly 10 is better.

[0104] It can be seen that the feed source S and the inductive device 130 are equivalent to direct-fed inductive excitation for the radiator 120. One end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feeding point P of the radiator 120, which is equivalent to the inductive device 130 being connected in series between the feed source S and the radiator 120. The inductive device 130 provides inductive compensation for the antenna assembly 10, thereby miniaturizing the radiator 120. The switch unit 150 uses SP4T, and the common end 151 of the switch unit 150 and two of its ports 152 (RF ports, i.e., the first end 1521 and the second end 1522) have different connection points of the inductor 130a (i.e., connected in a stepped manner). The total inductance value on the feeding path from the feed source S to the radiator 120 is controlled by the switch unit 150, and the other two ports 152 (the third end 1523 and the fourth end 1524) of the switch unit 150 are connected to the ground by other inductors 130a (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 realizing switching of the receiving frequency band and the transmitting frequency band of the corresponding frequency band in the target frequency band.

[0105] 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.

[0106] 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.

[0107] 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 target frequency band supported by the antenna assembly 10, it is sufficient.

[0108] 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 target frequency band supported by the antenna assembly 10, it is sufficient.

[0109] 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 target frequency band supported by the antenna assembly 10, it is sufficient.

[0110] 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 target frequency band supported by the antenna assembly 10.

[0111] 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 target frequency band supported by the antenna assembly 10.

[0112] When the inductive device 130 further includes a sixth inductor L6, the sixth inductor L6 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. It is sufficient that the sixth inductor L6 has an inductance characteristic within the target frequency band supported by the antenna assembly 10.

[0113] Next, taking the first frequency band as the B8 frequency band, the second frequency band as the B20 frequency band, the third frequency band as the B28 frequency band, and the fourth frequency band as the B5 frequency band as an example, a method for determining the inductance values ​​of the first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the fifth inductor L5, and the sixth inductor L6 in the antenna assembly 10 provided in an embodiment of the present application is described.

[0114] The antenna assembly 10 provided in this embodiment can be switched from 700MHz to 960MHz to cover all frequency bands in the low frequency band. The specific setting can first make the common end 151 and the first end 1521 electrically connected separately (also called the first end 1521 is turned on separately), and the antenna assembly 10 works in the first frequency band (the B8 frequency band in this embodiment), thereby determining the inductance value of the first inductor L1 and the inductance value of the sixth inductor L6. The common end 151 and the second end 1522 are electrically connected separately (also called the second end 1522 is turned on separately), and the antenna assembly 10 works in the second frequency band (the B20 frequency band in this embodiment), thereby determining the inductance value of the second inductor L2. Then the common terminal 151 is disconnected (Alloff) from all ports 152 (the first terminal 1521, the second terminal 1522, the third terminal 1523 and the fourth terminal 1524 in this case), 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.

[0115] Please also read Fig.15 , Fig.15 for Fig.14 Schematic diagram of S parameter curves of each frequency band of the target frequency band in the antenna assembly shown. In this schematic diagram, the horizontal axis is frequency, the unit is GHz, and the vertical axis is S parameters (SParameters), the unit is dB. Curve ① is the curve of the B8 frequency band; curve ② is the curve of the B20 frequency band; curve ③ is the curve of the B28 frequency band; curve ④ is the B5 frequency band. It can be seen that the antenna assembly 10 provided in the embodiment of the present application can support more operating frequency bands in the target frequency band and has better performance.

[0116] 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 target frequency band, contributing most of the radiation of the antenna assembly 10, and the radiator 120 is equivalent to acting as a radiation driving device for the entire antenna assembly 10, becoming an excitation condition for the floor 111 to work in the 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).

[0117] Please also read Fig.16 , Fig.16 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.16 (a) is an antenna assembly 10 using the embodiment of the present application; Fig.16 (b) is the antenna assembly 10 provided in the embodiment of the present application. The antenna assembly 10 that does not adopt the embodiment of the present application adopts the radiator 120 as the main radiating part of the antenna assembly 10, which is a composite left-right-handed transmission line (CRLH) scheme. When the antenna assembly 10 supports the low-frequency band, the length L1 of the radiator 120 is 40 mm. In the antenna assembly 10 provided in the embodiment of the present application, the floor 111 is the main radiating part of the target frequency band, and the length L2 of the radiator 120 is smaller than the length L1 of the radiator 120 in the antenna assembly 10 that does not adopt the embodiment of the present application, that is, L2<L1. The length of the radiator 120 of the antenna assembly 10 provided in the embodiment of the present application is 20 mm. Please refer to Fig.17 , Fig.17The figure is a schematic diagram comparing the system efficiency of each frequency band supported by the antenna assembly of the present application and the antenna assembly of the present application in free space. The English word for free space is FreeSpace, which is abbreviated as FS in the figure, and the system efficiency of free space is abbreviated as FS system efficiency. The B8 band, B5 band and B28 band are compared, wherein the performance of the antenna assembly 10 provided by the implementation of the present application in the B28 band is better than the performance of the antenna assembly 10 in the B28 band that does not adopt the implementation of the present application, and the system efficiency of free space is improved by more than 1dB. In addition, the performance of the antenna assembly 10 provided by the implementation 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 that does not adopt the implementation of the present application; accordingly, the performance of the antenna assembly 10 provided by the implementation 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 that does not adopt the implementation of the present application.

[0118] In the antenna assembly 10 provided in the previous embodiment, a portion of the radiator 120 in the antenna assembly 10 is arranged corresponding to the first side 1111, and another portion of the radiator 120 is arranged corresponding to the second side 1112. It can be understood that this should not constitute a limitation on the embodiment of the present application. Please refer to Fig.18 and Fig.19 , Fig.18 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig.19 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application. Fig.18 In the figure, the radiator 120 is arranged corresponding to the first side 1111. It can be understood that in the schematic diagram of this embodiment, the radiator 120 is arranged corresponding to the first side 1111 on the right side for example. In other embodiments, the radiator 120 can also be arranged corresponding to the first side 1111 on the left side, as long as the orthographic projection of the feed point P on the floor 111 is located in the current weak point area of ​​the characteristic mode current of the floor 111.

[0119] exist Fig.19 In the embodiment, the radiator 120 is arranged corresponding to the second side 1112. It can be understood that in the schematic diagram of this embodiment, the radiator 120 is arranged corresponding to the second side 1112 at the top as an example. In other embodiments, the radiator 120 can also be arranged corresponding to the second side 1112 at the bottom.

[0120] It can be understood that no matter where the radiator 120 is arranged, the orthographic projection of the feeding point P of the radiator 120 on the floor 111 is arranged in the current weak point area 110a adjacent to the radiator 120, and the orthographic projection of the feeding point P on the floor 111 falls in the current weak point area 110a, so that the feed source S is electrically connected to the feeding point P. Fig.18 and Fig.19 The feed source S and the electrical connector 160 are not shown in the figure. For the positions of the feed source S and the electrical connector 160, please refer to Figure 1 The position of the feed source S and the electrical connector 160.

[0121] In this embodiment, the radiator 120 can be set corresponding to the first edge 1111, and the radiator 120 can also be set corresponding to the second edge 1112. Part of the radiator 120 is set corresponding to the first edge 1111, and the other part of the radiator 120 is set corresponding to the second edge 1112. It can be seen that the setting of the radiator 120 is relatively flexible, so that when the antenna assembly 10 is applied to the electronic device 1, it is convenient to assemble it with other devices in the electronic device 1.

[0122] Please also read Fig. 20 , Fig.21 and Fig.26 , Fig. 20 A schematic diagram of an antenna assembly provided in yet another embodiment of the present application; Fig.21 for Fig. 20 A schematic diagram of an electric field weak point area in an antenna assembly provided in the figure. An embodiment of the present application provides an electronic device 1, wherein the electronic device 1 includes an antenna assembly 10. The antenna assembly 10 supports a target frequency band, and the antenna assembly 10 includes a floor 111, a radiator 120, and a feed source S. In one embodiment, the floor 111 of the antenna assembly 10 is a ground in a circuit board 110 in the electronic device 1, or a ground of a main board, or a ground of a circuit board and a ground of a main board. In this embodiment, the floor 111 is illustrated as an example of the ground of the circuit board 110. The floor 111 includes a first side 1111 and a second side 1112 connected by a bend. The radiator 120 has a feeding point P, and the orthographic projection of the feeding point P on the floor 111 is located in an area of ​​the floor 111 with a center point O of the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center and a radius R of 1 / 16 of the wavelength of the target frequency band. The feed source S is electrically connected to the feed point P and excites the floor 111 through the radiator 120 so that the antenna assembly 10 supports a target frequency band.

[0123] In this embodiment, the area of ​​the floor 111 with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center and 1 / 16 of the wavelength of the target frequency band as the radius is the current weak point area 110a of the characteristic mode current of the floor 111. When the floor 111 is the ground in the circuit board 110, the area of ​​the floor 111 with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center and 1 / 16 of the wavelength of the target frequency band as the radius can also be the current weak point area 110a of the characteristic mode current of the circuit board 110. The orthographic projection of the feeding point P on the floor 111 is located in an area of ​​the floor 111 with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center and 1 / 16 of the wavelength of the target frequency band as the radius, that is, the orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a of the floor 111.

[0124] Therefore, the current in the area of ​​the floor 111 with a radius of 1 / 16 of the wavelength of the target frequency band is relatively weak. By locating the orthographic projection of the feeding point P on the floor 111 within the area, an excitation current in the same extension direction along the first edge 1111 can be further better stimulated, so that the antenna assembly 10 has a higher radiation efficiency in the target frequency band.

[0125] In summary, in the antenna assembly 10 provided in the embodiment of the present application, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the feeding point P on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111, which can well excite the excitation current in the same extension direction along the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the 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 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 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.

[0126] In one embodiment, see Figure 8 The antenna assembly 10 includes an inductive device 130 , one end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feed point P.

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

[0128] It should be noted that the so-called inductive device 130 refers to a device that exhibits inductive characteristics within the 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 target frequency band supported by the antenna assembly 10.

[0129] Since the antenna assembly 10 provided in the embodiment of the present application has a feeding point P located in the current weak point area 110a of the characteristic mode of the floor, it can well excite the excitation current in the same extension direction along the first side 1111, and the floor 111 of the circuit board 110 constitutes the main radiation branch of the target frequency band, contributing 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 device, becoming the excitation condition for the floor 111 of the circuit board 110 to work in the 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.

[0130] The inductive device 130 can make up 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 target frequency band, and the antenna assembly 10 can work better in the target frequency band.

[0131] Furthermore, in one embodiment, the electrical length of the radiator 120 is satisfy:

[0132] The radiator 120 is in an open-circuit state at both ends. The length of the radiator 120 refers to the length of the extension path between the first open-circuit end 121 and the second open-circuit end 122. Considering the need for miniaturization of the radiator 120, the electrical length of the radiator 120 is Select less than or equal to At the same time, it is considered that if the physical length of the induction device 130 replacing the radiator 120 is too large, more energy loss will be introduced. Therefore, the electrical length of the radiator 120 is selected as In summary, the electrical length of the radiator 120 provided in the embodiment of the present application is satisfy: On the one hand, the size of the radiator 120 can be made smaller, and on the other hand, the antenna assembly 10 can have smaller energy loss when supporting the target frequency band.

[0133] It should be noted that the electrical length of the radiator 120 satisfies the following formula:

[0134] Wherein, L is the physical length of the radiator 120, a is the transmission time of the electromagnetic wave signal of the target frequency band in the radiator 120, and b is the transmission time of the electromagnetic wave signal of the target frequency band in free space.

[0135] Further, in one embodiment, please refer to Fig.11 The antenna assembly 10 further includes a switch unit 150, the switch unit 150 having a common terminal 151, a first terminal 1521 and a second terminal 1522; the inductive device 130 includes 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 feeding point P, and the other end is electrically connected to the first terminal 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 terminal 1522. One end of the third inductor L3 is electrically connected to the other end of the second inductor L2, and the other end of the third inductor L3 is electrically connected to the feed source S and the common terminal 151. When the common terminal 151 is electrically connected to the first terminal 1521, the antenna assembly 10 supports the first frequency band in the target frequency band. When the common terminal 151 is electrically connected to the second terminal 1522, the antenna assembly 10 supports the second frequency band in the target frequency band. When the common end 151 is electrically disconnected from the first end 1521 and the common end 151 is electrically disconnected from the second end 1522, the antenna assembly 10 supports a third frequency band in the 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.

[0136] When the common terminal 151 is electrically connected to the first terminal 1521, and the common terminal 151 is electrically disconnected from the second terminal 1522, and when the switch unit 150 also includes other ports, and the common terminal 151 is also electrically disconnected from the other ports, it is equivalent to that the second inductor L2 and the third inductor L3 are both short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feeding point P is the inductance value of the first inductor L1, and the first frequency band supported by the antenna assembly 10 is the frequency band with the highest frequency in the target frequency band.

[0137] It can be understood that when the antenna assembly 10 supports the first frequency band, when the switch unit 150 further includes other ports, the common terminal 151 is also electrically disconnected from the port 152 .

[0138] When the common end 151 is electrically connected to the second end 1522, and the common end 151 is electrically disconnected from the first end 1521, it is equivalent to that the third inductor L3 is short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feeding point P is the sum of the inductance value of the first inductor L1 and the inductance value of the second inductor L2. The second frequency band supported by the antenna assembly 10 is a frequency band in the middle of the target frequency band.

[0139] It can be understood that when the antenna assembly 10 supports the second frequency band, when the switch unit 150 further includes other ports, the common terminal 151 is also electrically disconnected from the port 152 .

[0140] When the common terminal 151 is electrically disconnected from the first terminal 1521, and the common terminal 151 is also electrically disconnected from the second terminal 1522, the first inductor L1, the second inductor L2, and the third inductor L3 are not short-circuited. At this time, the inductance value of the inductive device 130 connected in series on the path where the feed source S is electrically connected to the feed point P is the sum of the inductance values ​​of the first inductor L1, the second inductor L2, and the third inductor L3, and the third frequency band supported by the antenna assembly 10 is the lowest frequency band among the target frequency bands.

[0141] It can be understood that when the antenna assembly 10 supports the third frequency band, when the switch unit 150 further includes other ports, the common terminal 151 is also electrically disconnected from the port 152 .

[0142] The switch unit 150 may 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 target frequency band, so that the antenna assembly 10 can support more working frequency bands and has better communication performance.

[0143] In one implementation, the 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.

[0144] In one embodiment, see Fig.12, the switch unit 150 further has a third terminal 1523, and the inductive device 130 further includes a fourth inductor L4. One end of the fourth inductor L4 is electrically connected to the third terminal 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 greater than the frequency of the second frequency band.

[0145] The inductive device 130 also includes the fourth inductor L4, which is used to perform fine-tuning based on 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 assembly 10 supporting the second frequency band, thereby raising the second frequency band supported by the antenna assembly 10 to the fourth frequency band, and completing the switching of the fourth frequency band.

[0146] 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.

[0147] In this implementation, the second frequency band is the B20 frequency band, and the fourth frequency band is the B5 frequency band.

[0148] In one embodiment, see Fig.13 , 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 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 target frequency band.

[0149] The corresponding frequency bands in the 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.

[0150] When the common terminal 151 is electrically disconnected from the fourth terminal 1524, and the antenna assembly 10 supports the corresponding frequency band in the 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 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.

[0151] In one embodiment, see Fig.14 The inductive device 130 further includes a sixth inductor L6. One end of the sixth inductor L6 is electrically connected to a connection point between the feed source S and the third inductor L3, and the other end of the sixth inductor L6 is grounded.

[0152] The sixth inductor L6 can improve the matching state of the antenna assembly 10, so that when the antenna assembly 10 supports various frequency bands, the output impedance of the feed source S and the common input impedance of the first radiation arm and the second radiation arm are more matched, so that the energy of the excitation signal output by the feed source S is more loaded to the first radiation arm and the second radiation arm, so that the antenna performance of the antenna assembly 10 is better.

[0153] It can be seen that the feed source S and the inductive device 130 are equivalent to direct-fed inductive excitation for the radiator 120. One end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feeding point P of the radiator 120, which is equivalent to the inductive device 130 being connected in series between the feed source S and the radiator 120. The inductive device 130 provides inductive compensation for the antenna assembly 10, thereby miniaturizing the radiator 120. The switch unit 150 uses SP4T, and the common end 151 of the switch unit 150 and two of its ports 152 (RF ports, i.e., the first end 1521 and the second end 1522) have different connection points of the inductor 130a (i.e., connected in a stepped manner). The total inductance value on the feeding path from the feed source S to the radiator 120 is controlled by the switch unit 150, and the other two ports 152 (the third end 1523 and the fourth end 1524) of the switch unit 150 are connected to the ground by other inductors 130a (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 realizing switching of the receiving frequency band and the transmitting frequency band of the corresponding frequency band in the target frequency band.

[0154] 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.

[0155] 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.

[0156] 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 target frequency band supported by the antenna assembly 10, it is sufficient.

[0157] 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 target frequency band supported by the antenna assembly 10, it is sufficient.

[0158] 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 target frequency band supported by the antenna assembly 10, it is sufficient.

[0159] 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 target frequency band supported by the antenna assembly 10.

[0160] 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 target frequency band supported by the antenna assembly 10.

[0161] When the inductive device 130 also includes a sixth inductor L6, the sixth inductor L6 satisfies at least one of the following conditions: a single inductor; a plurality of inductors connected in series; a plurality of inductors connected in parallel; a capacitor and an inductor connected in series; a capacitor and an inductor connected in parallel. As long as the sixth inductor L6 has an inductive characteristic within the target frequency band supported by the antenna assembly 10. The antenna assembly 10 provided in this embodiment can be switched from 700 MHz to 960 MHz to cover each frequency band 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 separately conducting the first end 1521), and the antenna assembly 10 operates in the first frequency band (the B8 frequency band in this embodiment), thereby determining the inductance value of the first inductor L1 and the inductance value of the sixth inductor L6. The common terminal 151 is electrically connected to the second terminal 1522 separately (also referred to as conducting the second terminal 1522 separately), and the antenna assembly 10 operates in the second frequency band (the B20 frequency band in this embodiment), thereby determining the inductance value of the second inductor L2. The common terminal 151 is then disconnected (Alloff) from all ports 152 (the first terminal 1521, the second terminal 1522, the third terminal 1523, and the fourth terminal 1524 in this case), 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. The common terminal 151 is then 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 transmit / receive (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.

[0162] It should be noted that the comparison between the antenna assembly 10 provided in the previous embodiment and the radiator of the antenna assembly 10 not using the embodiment of the present application, the comparison of system efficiency, and the simulation of S parameters are also applicable to the antenna assembly 10 provided in the present embodiment.

[0163] To sum up, the distribution method of the characteristic mode current of the circuit board 110 in the implementation mode of the present application feeds the ground at the current weak point of the circuit board 110 through the CCE method, thereby fully exciting the longitudinal current of the circuit board 110, thereby improving the free space efficiency of the target frequency band supported by the antenna assembly 10.

[0164] In one embodiment, the antenna assembly 10 provided in the embodiment of the present application has an improvement of more than 1 dB in the B28 frequency band of the low frequency band compared to the antenna assembly 10 not using the embodiment of the present application in the B28 frequency band.

[0165] In addition, in one embodiment, the antenna assembly 10 further includes an inductive device 130 and a switch unit 150, and the inductive device 130 is connected in series to compensate for the inductance of the antenna assembly 10, so that the electrical length of the radiator 120 in the antenna assembly 10 is satisfy: Compared with the electrical length of the radiator 120 of one quarter wavelength in the antenna assembly 10 not adopting the implementation scheme of the present application, the electrical length of the radiator 120 of the antenna assembly 10 provided in the implementation scheme of the present application can be reduced by more than 50% without affecting the antenna performance of the antenna assembly 10.

[0166] In addition, in one embodiment, the switch unit 150 is used in a step-by-step switching manner, so that the additional loss caused by the antenna assembly 10 including the switch unit 150 can be reduced.

[0167] See also Fig. 22 and Fig.23 , Fig. 22 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application; Fig.23 This is a partial structural diagram of an antenna assembly provided in another embodiment of the present application. The antenna assembly 10 includes an inductive device 130. One end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feed point P. Fig. 9 And related descriptions can be seen, Fig. 9 In (b), the length of the radiator of the antenna assembly 10 including the inductive device 130 is smaller.

[0168] exist Fig. 22 and Fig.23 In the embodiment, the inductive device 130 includes a first inductor L01, one end of the first inductor L01 is electrically connected to the feed source S, and the other end of the first inductor L01 is electrically connected to the feed point P.

[0169] It should be noted that the so-called inductive device 130 refers to a device that exhibits inductive characteristics within the 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 target frequency band supported by the antenna assembly 10.

[0170] Since the antenna assembly 10 provided in the embodiment of the present application has a positive projection of the feeding point P on the floor 111 located in the current weak point area 110a of the characteristic mode of the floor 111, it can better excite the excitation current in the same extension direction along the first side 1111. The floor 111 constitutes the main radiation branch of the 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 device, becoming the excitation condition for the floor 111 to work in the 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. 9 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.

[0171] The inductive device 130 includes a first inductor L01 that can compensate for the insufficiency of the inductance caused by the miniaturization of the radiator 120 , so that the antenna assembly 10 has better antenna performance in the target frequency band, and the antenna assembly 10 works better in the target frequency band.

[0172] Furthermore, the antenna assembly 10 further includes a switch unit 150. The switch unit 150 has a common terminal 151 and N ports 152, and the common terminal 151 can be electrically connected to at least one of the N ports 152. The inductive device 130 further includes N second inductors L02, one end of the second inductor L02 is electrically connected to the port 152, and different inductors are electrically connected to different ports 152. The common terminal 151 is electrically connected to the feeding point P, and the other ends of the N second inductors L02 are all electrically connected to the feed source S (see Fig. 22 ); or, the common terminal 151 is electrically connected to the feed source S, and the other ends of the N second inductors L02 are electrically connected to the feed point P (see Fig.23 ).

[0173] When the common terminal 151 is 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, and the operating frequency band in the target frequency band supported by the antenna assembly 10 is different, where N≥1 and N is a positive integer.

[0174] In this embodiment, N=4 is used as an example for illustration. It can be understood that as long as N≥1 and N is a positive integer. When N=4, the switch unit 150 can be a single-pole four-throw switch (SP4T). The electrical connection between the common terminal 151 and each port 152 of the N ports 152 is independent of each other. When the electrical connection relationship between the common terminal 151 and one port 152 of the N ports 152 does not affect the electrical connection relationship between the common terminal 151 and another port 152 of the N ports 152. The common terminal 151 can be electrically connected to one port 152 of the N ports 152, or to two ports 152 of the N ports 152, or to all ports 152 of the N ports 152, or it can be electrically disconnected from all ports 152 of the N ports 152. The port 152 is electrically connected to the second inductor L02. It can be seen that the electrical connection relationship between the common terminal 151 in the switch unit 150 and the N ports 152 can control the inductance value of the inductive device 130 in the path between the feed source S and the feeding point P. The inductance value of the inductive device 130 is different, and the operating frequency of the target frequency band supported by the antenna assembly 10 is different.

[0175] For example, when the common terminal 151 in the switch unit 150 is disconnected from all of the N ports 152, the inductance value of the inductive device 130 is the inductance value of the first inductor L01, and therefore, the antenna assembly 10 supports a lower frequency band, such as B28. When the common terminal 151 in the switch unit 150 is electrically connected to at least one of the N ports 152, the inductance value of the inductive device 130 is the parallel inductance value obtained by connecting the first inductor L01 in parallel with the second inductor L02 electrically connected to the at least one port 152, and the parallel inductance value is less than the inductance value of the first inductor, and the frequency band supported by the antenna assembly 10 is adjusted higher, for example, the antenna assembly 10 supports the B20 frequency band at this time.

[0176] The antenna assembly 10 provided in the embodiment of the present application, the inductive device 130 and the switch unit 150 cooperate to achieve more precise adjustment of the working frequency band in the target frequency band supported by the antenna assembly 10, so that the antenna assembly 10 has better communication performance.

[0177] See also Fig.24 and Fig.25 , Fig.24 A partial structural schematic diagram of an antenna assembly provided in yet another embodiment of the present application; Fig.25This is a partial structural diagram of an antenna assembly provided in another embodiment of the present application. The antenna assembly 10 includes an inductive device 130. One end of the inductive device 130 is electrically connected to the feed source S, and the other end of the inductive device 130 is electrically connected to the feed point P. Fig. 9 And related descriptions can be seen, Fig. 9 In (b), the length of the radiator of the antenna assembly 10 including the inductive device 130 is smaller.

[0178] exist Fig.24 and Fig.25 In the embodiment, the inductive device 130 includes a first inductor L01, one end of the first inductor L01 is electrically connected to the feed source S, and the other end of the first inductor L01 is electrically connected to the feed point P.

[0179] The antenna assembly 10 further includes a switch unit 150, the switch unit 150 includes a common terminal 151 and N ports 152, the common terminal 151 can be electrically connected to at least one of the N ports 152, the inductive device 130 further includes N second inductors L02, one end of the second inductor L02 is electrically connected to the port 152, and different inductors are electrically connected to different ports 152. It should be noted that the inductance values ​​of the second inductors L02 can be the same or different.

[0180] The common terminal 151 is electrically connected to the feeding point P, the other ends of the M second inductors L02 in the N second inductors L02 are electrically connected to the feed source S, and the other ends of the NM second inductors L02 in the N second inductors L02 are all grounded ( Fig.24 ); or, the common terminal 151 is electrically connected to the feed source S, the other ends of the M second inductors L02 of the N second inductors L02 are electrically connected to the feed point P, and the other ends of the NM second inductors L02 of the N second inductors L02 are all grounded ( Fig.25 ).

[0181] When the common terminal 151 is 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, and the operating frequency bands in the target frequency band supported by the antenna assembly 10 are different, wherein N and M are both positive integers, and M<N.

[0182] In this embodiment, N=4, M=2 is used as an example for illustration. It can be understood that as long as N≥1 and N is a positive integer. When N=4, the switch unit 150 can be a single-pole four-throw switch (SP4T). The electrical connection between the common terminal 151 and each port 152 of the N ports 152 is independent of each other. When the electrical connection relationship between the common terminal 151 and one port 152 of the N ports 152 does not affect the electrical connection relationship between the common terminal 151 and another port 152 of the N ports 152. The common terminal 151 can be electrically connected to one port 152 of the N ports 152, or to two ports 152 of the N ports 152, or to all ports 152 of the N ports 152, or it can be electrically disconnected from all ports 152 of the N ports 152. The port 152 is electrically connected to the second inductor L02. It can be seen that the electrical connection relationship between the common terminal 151 in the switch unit 150 and the N ports 152 can control the inductance value of the inductive device 130 in the path between the feed source S and the feeding point P. The inductance value of the inductive device 130 is different, and the operating frequency of the target frequency band supported by the antenna assembly 10 is different.

[0183] The antenna assembly 10 provided in the embodiment of the present application, the inductive device 130 and the switch unit 150 cooperate to achieve more precise adjustment of the working frequency band in the target frequency band supported by the antenna assembly 10, so that the antenna assembly 10 has better communication performance.

[0184] It should be noted that in Figure 22 to Figure 25 In the figure, the focus is on illustrating the inductive device 130 and the switch unit 150 in the antenna assembly 10, so the marking of the radiator 120 is simplified. The structure of the radiator 120 can be found in the previous embodiments. It can be understood that the structure of the radiator 120 shown in the schematic diagram of this embodiment should not be understood as a limitation on the embodiment of the present application. In addition, for the port 152 in the switch unit 150, the switch unit 150 in the figure is marked as 1, 2, 3, and 4, and the ports marked as 1 and 4 in the switch unit 150 are marked as port 152, and the rest are not marked.

[0185] In this embodiment, NM grounded second inductors L02 are used to fine-tune the frequency band supported by the antenna assembly 10, so that the antenna assembly 10 supports the working frequency band in the target frequency band more accurately, thereby improving the communication performance of the antenna assembly 10.

[0186] The embodiment of the present application also provides an electronic device 1. The electronic device 1 includes but is not limited to a mobile phone, a telephone, a television, a tablet computer (Pad), a camera, a personal computer, a laptop computer (Personal Computer, PC), a vehicle-mounted device, a headset, a watch, a wearable device, a base station, a vehicle-mounted radar, a customer premise equipment (Customer Premise Equipment, CPE) and other devices that can send and receive electromagnetic wave signals. In this application, the electronic device 1 is taken as an example of a mobile phone, and other devices can refer to the specific description in this application. In addition, the electronic device 1 can be, but is not limited to, a device with or without a display screen.

[0187] The electronic device 1 includes an antenna assembly 10 as provided in any of the above embodiments. Fig.26 , Fig.26 The present invention is a three-dimensional schematic diagram of an electronic device provided in one embodiment. The electronic device 1 also includes a device body 30. The antenna assembly 10 is carried by the device body 30. The device body 30 includes but is not limited to a display screen 310 and a housing 330 that are mutually covered and connected. The display screen 310 and the housing 330 cooperate to form a receiving space. The antenna assembly 10 can be arranged inside the housing 330 of the electronic device 1, or partially integrated with the housing 330, or partially arranged outside the housing 330.

[0188] 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.

[0189] This embodiment provides an electronic device 1 including an antenna assembly 10, wherein the floor 111 of the circuit board 110 in the antenna assembly 10 constitutes a first radiating arm of a dipole antenna, the radiator 120 constitutes a second radiating arm of the dipole antenna, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the feeding point P on the floor 111 is located at a current weak point region 110a of a characteristic mode current of the floor 111, which can better excite an 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 target frequency band.

[0190] In one embodiment, the antenna assembly 10 of the electronic device 1 provided in the embodiment of the present application has an improvement of more than 1 dB in the B28 band of the low frequency band compared to the antenna assembly 10 not using the embodiment of the present application in the B28 band.

[0191] In addition, in one embodiment, the antenna assembly 10 of the electronic device 1 further includes an inductive device 130 and a switch unit 150, and the inductance of the antenna assembly 10 is compensated by connecting the inductive device 130 in series, so that the electrical length of the radiator 120 in the antenna assembly 10 is satisfy: Wherein, λ is the wavelength of the electromagnetic wave signal in the target frequency band. Compared with the electrical length of the radiator 120 in the antenna assembly 10 not using the embodiment of the present application, which is one quarter of a wavelength, the electrical length of the radiator 120 of the antenna assembly 10 provided in the embodiment of the present application can be reduced by more than 50% without affecting the antenna performance of the antenna assembly 10.

[0192] In addition, in one embodiment, the switch unit 150 is used in a step-by-step switching manner, so that the additional loss caused by the antenna assembly 10 including the switch unit 150 can be reduced.

[0193] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device includes an antenna assembly, the antenna assembly including: A floor, the floor comprising a first side and a second side connected by a bend, wherein the length of the first side is greater than the length of the second side; a radiator, the radiator having a first open end, a second open end and a feeding point, the radiator being spaced apart from the floor, and an orthographic projection of the feeding point on the floor being located at a current weak point region of a characteristic mode current of the floor; and A feed source is electrically connected to the feeding point, and excites the floor through the radiator to generate an excitation current in the same extension direction of the first side to support electromagnetic wave signals in a target frequency band.

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

3. The electronic device according to claim 2, characterized in that: The floor comprises two first sides arranged opposite to each other and two second sides arranged opposite to each other, the number of the current weak point areas is four, the orthographic projection of the feeding point on the floor is located in any one of the four current weak point areas, and the radiator is adjacent to the current weak point area where the feeding point is arranged.

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

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

6. The electronic device according to claim 4, characterized in that: The antenna assembly further includes a switch unit, wherein the switch unit has a common terminal and N ports; the inductive device includes: 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 feeding point, and the other end of the series inductor is electrically connected to the feed source; Wherein, a connection point of two adjacent inductors is electrically connected to one first port, and different connection points are electrically connected to different first ports; 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 target frequency band supported by the antenna assembly are different.

7. The electronic device according to claim 6, characterized in that: The N ports include a first end and a second end; the N+1 inductors include: a first inductor, wherein one end of the first inductor is electrically connected to the feeding point, and the other end of the first inductor is electrically connected to the first end; a second inductor, one end of the second inductor being electrically connected to the other end of the first inductor, and the other end of the second inductor being electrically connected to the second end; and a third inductor, one end of the third inductor being electrically connected to the other end of the second inductor, and the other end of the third inductor being electrically connected to the feed source and the common end; When the common end is electrically connected to the first end, the antenna assembly supports a first frequency band in the target frequency band; when the common end is electrically connected to the second end, the antenna assembly supports a second frequency band in the 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 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.

8. The electronic device according to claim 7, characterized in that: The first frequency band is the B8 frequency band, the second frequency band is the B20 frequency band, and the third frequency band is the B28 frequency band.

9. The electronic device according to claim 7, 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 port, and the other end of the fourth inductor being grounded; When the common end is electrically connected to the second port and the common end is electrically connected to the third port, the antenna assembly supports a fourth frequency band, wherein a frequency of the fourth frequency band is greater than a frequency of the second frequency band.

10. The electronic device according to claim 9, characterized in that: The fourth frequency band is the B5 frequency band.

11. The electronic device according to claim 7, 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 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 target frequency band.

12. The electronic device according to claim 7, characterized in that: The inductive device also includes: A sixth inductor, one end of the sixth inductor is electrically connected to a connection point between the feed source and the third inductor, and the other end of the sixth inductor is grounded.

13. The electronic device according to claim 4, characterized in that: The inductive device includes a first inductor, one end of the first inductor is electrically connected to the feed source, and the other end of the first inductor is electrically connected to the feed point.

14. The electronic device according to claim 13, characterized in that: The antenna assembly further includes a switch unit, the switch unit having a common end and N ports, the common end being electrically connected to at least one of the N ports, the inductive device further includes N second inductors, one end of the second inductor being electrically connected to the port, and different inductors being electrically connected to different ports; Wherein, the common end is electrically connected to the feed point, and the other ends of the N second inductors are electrically connected to the feed source; or, the common end is electrically connected to the feed source, and the other ends of the N second inductors are electrically connected to the feed point; When the common end is connected to different ports, or the common end is disconnected from the N ports, the inductance value of the inductive device is different, and the operating frequency band in the target frequency band supported by the antenna assembly is different, where N is a positive integer.

15. The electronic device according to claim 13, characterized in that: The antenna assembly further includes a switch unit, the switch unit includes a common end and N ports, the common end can be electrically connected to at least one of the N ports, the inductive device further includes N second inductors, one end of the second inductor is electrically connected to the port, and different inductors are electrically connected to different ports; Wherein, the common end is electrically connected to the feeding point, the other ends of M second inductors among the N second inductors are electrically connected to the feeding source, and the other ends of NM second inductors among the N second inductors are all grounded; or, the common end is electrically connected to the feeding source, the other ends of M second inductors among the N second inductors are electrically connected to the feeding point, and the other ends of NM second inductors among the N second inductors are all grounded; When the common end is connected to different ports, or the common end is electrically disconnected from the N ports, the inductance value of the inductive device is different, and the operating frequency bands in the target frequency band supported by the antenna assembly are different, wherein N and M are both positive integers, and M<N.

16. An electronic device, characterized in that: The electronic device includes an antenna assembly, the antenna assembly including: A floor, the floor comprising a first side and a second side that are bent and connected; a radiator, the radiator having a feeding point, the orthographic projection of the feeding point on the floor being located within a region of the floor with a circle centering at an intersection of an extension line of the first side and an extension line of the second side and with a radius of 1 / 16 of a wavelength of a target frequency band; and A feed source is electrically connected to the feed point and excites the floor through the radiator so that the antenna assembly supports the target frequency band.

17. The electronic device according to claim 16, characterized in that: The antenna assembly comprises: An inductive device, one end of which is electrically connected to the feed source, and the other end of which is electrically connected to the feed point.

18. The electronic device according to claim 17, characterized in that: The electrical length of the radiator satisfy: Wherein, λ is the wavelength of the electromagnetic wave signal in the target frequency band supported by the antenna assembly.

19. The electronic device according to claim 17, wherein: The antenna assembly further includes a switch unit, wherein the switch unit has a first common end and a second common end; the inductive device includes: a first inductor, wherein one end of the first inductor is electrically connected to the feeding point, and the other end of the first inductor is electrically connected to the first end; a second inductor, one end of the second inductor being electrically connected to the other end of the first inductor, and the other end of the second inductor being electrically connected to the second end; and a third inductor, one end of the third inductor being electrically connected to the other end of the second inductor, and the other end of the third inductor being electrically connected to the feed source and the common end; When the common end is electrically connected to the first end, the antenna assembly supports a first frequency band in the target frequency band; when the common end is electrically connected to the second end, the antenna assembly supports a second frequency band in the 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 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.

20. The electronic device according to claim 19, 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 port, and the other end of the fourth inductor being grounded; When the common end is electrically connected to the second port and the common end is electrically connected to the third port, the antenna assembly supports a fourth frequency band, wherein a frequency of the fourth frequency band is greater than a frequency of the second frequency band.

21. 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 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 target frequency band.

22. The electronic device according to claim 20, characterized in that The inductive device also includes: A sixth inductor, one end of the sixth inductor is electrically connected to a connection point between the feed source and the third inductor, and the other end of the sixth inductor is grounded.

23. The electronic device according to claim 17, characterized in that: The inductive device includes a first inductor, one end of the first inductor is electrically connected to the feed source, and the other end of the first inductor is electrically connected to the feed point.

24. The electronic device according to claim 23, characterized in that The antenna assembly further includes a switch unit, the switch unit having a common end and N ports, the common end being electrically connected to at least one of the N ports, the inductive device further includes N second inductors, one end of the second inductor being electrically connected to the port, and different inductors being electrically connected to different ports; Wherein, the common end is electrically connected to the feed point, and the other ends of the N second inductors are electrically connected to the feed source; or, the common end is electrically connected to the feed source, and the other ends of the N second inductors are electrically connected to the feed point; When the common end is connected to different ports, or the common end is disconnected from the N ports, the inductance value of the inductive device is different, and the operating frequency band in the target frequency band supported by the antenna assembly is different, where N is a positive integer.

25. The electronic device according to claim 23, characterized in that The antenna assembly further includes a switch unit, the switch unit includes a common end and N ports, the common end can be electrically connected to at least one of the N ports, the inductive device further includes N second inductors, one end of the second inductor is electrically connected to the port, and different inductors are electrically connected to different ports; Wherein, the common end is electrically connected to the feeding point, the other ends of M second inductors among the N second inductors are electrically connected to the feeding source, and the other ends of NM second inductors among the N second inductors are all grounded; or, the common end is electrically connected to the feeding source, the other ends of M second inductors among the N second inductors are electrically connected to the feeding point, and the other ends of NM second inductors among the N second inductors are all grounded; When the common end is connected to different ports, or the common end is electrically disconnected from the N ports, the inductance value of the inductive device is different, and the operating frequency bands in the target frequency band supported by the antenna assembly are different, wherein N and M are both positive integers, and M<N.

Images