Electronic device

Abstract

The invention provides an electronic device. The electronic equipment comprises an antenna assembly. The antenna assembly comprises a floor, a radiator and a feed source. 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 weakness area of characteristic mode current of the floor; the feed source is electrically connected to the feed point, the feed source is used for outputting a first excitation signal and a second excitation signal, the first excitation signal is used for exciting the floor to support a first frequency band, the second excitation signal is used for exciting the radiator to support a second frequency band, the frequency of the first frequency band is smaller than that of the second frequency band. The communication performance of the antenna assembly of 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] floor;

[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 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

[0006] A feed source, the feed source is electrically connected to the feed point, the feed source is used to output a first excitation signal and a second excitation signal, the first excitation signal is used to excite the floor to support a first frequency band, and the second excitation signal is used to excite the radiator to support a second frequency band, wherein the frequency of the first frequency band is less than the frequency of the second frequency band.

[0007] In summary, in the antenna assembly in the electronic device provided in the embodiment of the present application, the orthographic projection of the feed point on the floor is located in the current weak point area of ​​the characteristic mode current of the floor, which can better excite the characteristic current along the floor. Therefore, the floor constitutes the main radiation branch of the first frequency band, contributing most of the radiation of the antenna assembly in the first frequency band, and the radiator of the antenna assembly accounts for a small proportion of the energy in the first frequency band. Therefore, the size of the radiator can be reduced. It can be seen that the size of the radiator in the antenna assembly is small, which is conducive to the miniaturization of the antenna assembly. In addition, in the antenna assembly provided in the embodiment of the present application, the second excitation signal also excites the radiator to support the second frequency band. Therefore, the antenna assembly can support more frequency bands and has better communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] 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.

[0009] Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0010] Figure 2 for Figure 1 A side view of a portion of the structure of the antenna assembly is provided;

[0011] Figure 3 for Figure 1 Schematic diagram of the equivalent circuit structure of the antenna assembly;

[0012] Figure 4 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;

[0013] Figure 5 for Figure 4 A schematic diagram of a current weak point area and a current strong point area in a floor of a circuit board shown;

[0014] Figure 6 for Figure 1 A partially labeled schematic diagram of an antenna assembly shown in ;

[0015] Figure 7 for Figure 6 Schematic diagram of S parameters of the antenna assembly shown in;

[0016] Figure 8 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0017] Fig. 9 A schematic diagram of a portion where the radiator is replaced by an inductive device;

[0018] Fig.10 In one embodiment Figure 8 A schematic diagram of the specific structure of the antenna assembly shown in ;

[0019] Fig.11 In another embodiment Figure 8 A schematic diagram of the specific structure of the antenna assembly shown in ;

[0020] Fig.12 In another embodiment Figure 8 A schematic diagram of the specific structure of the antenna assembly shown in ;

[0021] Fig.13 In another embodiment Fig.12 A schematic diagram of the specific structure of the antenna assembly shown in ;

[0022] Fig.14 In another embodiment Fig.12 A schematic diagram of the specific structure of the antenna assembly shown in ;

[0023] Fig.15 for Figure 1 A schematic diagram of the electric field weak spot area in the antenna assembly is provided;

[0024] Fig.16 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0025] Fig.17 for Fig.16 The S-parameter diagram of the antenna assembly shown;

[0026] Fig.18 for Fig.16 A schematic diagram of antenna radiation efficiency of the antenna assembly shown;

[0027] Fig.19 for Fig.16 A schematic diagram of the current distribution of the antenna assembly is provided;

[0028] Fig. 20 A schematic diagram of the position of the radiator in the antenna assembly provided for each implementation;

[0029] Fig.21 A three-dimensional schematic diagram of an electronic device provided in one embodiment. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1 , Figure 2 , Figure 3 and Fig.21 , Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application; Figure 3 for Figure 1Schematic diagram of the equivalent circuit structure of the antenna assembly; Fig.21 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 3 Omitted Figure 1 The antenna assembly 10 includes a circuit board 110, a radiator 120 and a feed source S. The circuit board 110 has a floor 111. The radiator 120 has a first open end 121, a second open end 122 and a feed point P, the radiator 120 is spaced apart from the floor 111, and the orthographic projection of the feed point P on the floor 111 is located at the current weak point area 110a of the characteristic mode current of the floor 111. The feed source S is electrically connected to the feed point P, and the feed source S is used to output a first excitation signal and a second excitation signal, the first excitation signal is used to excite the floor 111 to support a first frequency band, and the second excitation signal is used to excite the radiator 120 to support a second frequency band, wherein the frequency of the first frequency band is less than the frequency of the second frequency band.

[0032] 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 the ground of the circuit board 110 for illustration, which is understandable and should not be understood as a limitation on the floor 111 provided in the embodiment of the present application.

[0033] 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 111 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.

[0034] The radiator 120 may be a laser direct structuring (LDS) radiator, or a flexible printed circuit (FPC) radiator, or a print direct structuring (PDS) radiator, or a metal branch radiator. Fig.21 ), the radiator 120 may be a mechanical design antenna (MDA) radiator designed using the metal of the electronic device 1 itself. For example, the radiator 120 may be an antenna radiator designed using the middle frame formed by plastic and metal of the electronic device 1. In addition, the radiator 120 may also be a metal frame antenna radiator designed using a metal middle frame.

[0035] 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.

[0036] 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 140 (see Figure 1 ), the feed source S is electrically connected to the feed point P through the electrical connector 140. The electrical connector 140 may be, but is not limited to, an elastic conductive sheet, or a conductive screw, etc.

[0037] The feed source S is electrically connected to the feed point P through the electrical connector 140 , so that the electrical connection between the feed source S and the feed point P can be realized, which is simple and easy.

[0038] 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. The lower the frequency of the first frequency band supported by the antenna assembly 10, the more significant the current effect of the floor 111, that is, for the antenna assembly 10 whose first 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.

[0039] For the antenna assembly 10 whose first 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, and the radiation efficiency of the antenna assembly 10 can be effectively improved. It can be understood that although the first frequency band is a low frequency band as an example for explanation here, in other embodiments, the first frequency band can also be a medium frequency, or a high frequency, or a wireless fidelity (WiFi) frequency band, or a global positioning system (GPS) frequency band, etc. The embodiments of this application do not limit the first frequency band.

[0040] The working principle of the antenna assembly 10 provided in the embodiment of the present application is described and explained below.

[0041] In this embodiment, the floor 111 is taken as the ground of the circuit board 110 for explanation. The circuit board 110 is a main board. The characteristic mode is the inherent mode of 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 explanation using the first frequency band supported by the antenna assembly 10 as a low-frequency band as an example. The characteristic current with the largest proportion of the longitudinal current mode can be obtained through simulation. Please refer to Figure 4 and Figure 5 , Figure 4 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; Figure 5 for Figure 4 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 4It 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 4 In 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, the 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, the 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 5 ,exist Figure 5 In the figure, there is a current weak point area 110a of the characteristic mode current of the floor 111 in the circuit board 110, and a current strong point area 110b of the characteristic mode current 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 current weak point area 110a of the characteristic mode of the floor 111 can also be used. The so-called current weak point area 110a of the characteristic mode current of the floor 111 refers to the area including the minimum value of the characteristic mode current of the floor 111. 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 .

[0042] In the embodiment of the present application, the number of the current weak point areas 110a of the floor 111 is four. The orthographic projection of the feed source S 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 feed source S is disposed.

[0043] In this embodiment, the orthographic projection of the feeding point P on the floor 111 is located in the current weak point region 110a of the characteristic mode current of the floor 111, so that the characteristic current on the floor 111 can be excited, and the miniaturization of the antenna assembly 10 can be achieved.

[0044] Specifically, in the antenna assembly 10 provided in the embodiment of the present application, the floor 111 constitutes the main radiation branch in the first frequency band, contributing most of the radiation of the antenna assembly 10 in the first frequency band, 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 first 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.

[0045] In one embodiment, when the first frequency band is the GPS L5 frequency band and the second frequency band is the N78 frequency band, the length of the radiator 120 in the antenna assembly 10 is 26 mm, which is smaller than the length of the radiator 120 in the related technology (the length of the radiator in the related technology is 35 mm to 45 mm).

[0046] In summary, in the antenna assembly 10 in the electronic device 1 provided in the embodiment of the present application, the orthographic projection of the feed point P on the floor 111 is located in the current weak point area 110a of the characteristic mode current of the floor 111, which can well excite the characteristic current along the floor 111. Therefore, the floor 111 constitutes the main radiation branch of the first frequency band, contributing most of the radiation of the antenna assembly 10 in the first frequency band, and the radiator 120 of the antenna assembly 10 accounts for a small proportion of the energy in the first frequency band, so the size of the radiator 120 can be reduced. It can be seen that the size of the radiator 120 in the antenna assembly 10 is small, which is conducive to the miniaturization of the antenna assembly 10. In addition, in the antenna assembly 10 provided in the embodiment of the present application, the second excitation signal also excites the radiator 120 to support the second frequency band. Therefore, the antenna assembly 10 can support more frequency bands and has better communication performance.

[0047] See also Figure 6 and Figure 7 , Figure 6 for Figure 1 A partially labeled schematic diagram of an antenna assembly shown in ; Figure 7 for Figure 6 The S-parameter diagram of the antenna assembly shown in Figure 7 The horizontal axis is the frequency in GHz, and the vertical axis is the S-Parameters in dB. Figure 7 The S1,1 curve is also called the reflection coefficient curve. The second excitation signal is used to excite the radiator 120 to generate a first resonance and a second resonance in the second frequency band, wherein the resonance frequency of the first resonance is different from the resonance frequency of the second resonance.

[0048] In this embodiment, the feeding point P is located between the first open end 121 and the second open end 122. The portion from the feeding point P to the first open end 121 is the first radiating portion 121a; the portion from the feeding point P to the second open end 122 is the second radiating portion 122a. In other words, the radiator 120 includes the first radiating portion 121a and the second radiating portion 122a, that is, the radiator 120 includes the first radiating portion 121a from the feeding point P to the first open end 121, and the second radiating portion 122a from the feeding point P to the second open end 122. The length of the first radiating portion 121a is L1, and the length of the second radiating portion 122a is L2, L1>L2, the first radiating portion 121a supports the first resonance, and the second radiating portion 122a supports the second resonance, wherein the resonance frequency of the first resonance is less than the resonance frequency of the second resonance. It can be understood that in other embodiments, L1<L2, and accordingly, the first radiating portion 121a supports the first resonance, and the second radiating portion 122a supports the second resonance, wherein the resonance frequency of the first resonance is greater than the resonance frequency of the second resonance. In other words, the shorter one of the first radiating portion 121a and the second radiating portion 122a supports a higher resonance frequency, and the longer one of the first radiating portion 121a and the second radiating portion 122a supports a lower resonance frequency.

[0049] As can be seen from the S parameter diagram, the first frequency band is the GPS L5 frequency band, and the resonant frequency point of the first frequency band is shown in Figure 7 Point 1 in the figure; the second frequency band is the N78 frequency band, wherein point 2 represents the resonant frequency of the first resonance (3.4458 GHz in the figure), and point 3 represents the resonant frequency of the second resonance (3.7535 GHz in the figure).

[0050] In the antenna assembly 10 provided in this embodiment, the second excitation signal excites the radiator 120 to generate the first resonance and the second resonance in the second frequency band. In other words, the antenna assembly 10 has dual resonance in the second frequency band. Compared with the related art, in which the radiator 120 has a single resonance in the second frequency band, the antenna assembly 10 provided in the embodiment of the present application has dual resonance in the second frequency band. Therefore, the antenna assembly 10 provided in the embodiment of the present application has a wider bandwidth in the second frequency band, a higher sideband efficiency, and better antenna performance.

[0051] The antenna assembly 10 provided in this embodiment, the radiator 120 includes a first open end 121 and a second open end 122, the feeding point P is located between the first open end 121 and the second open end 122, and the radiator 120 is equivalent to two branches of a T-shaped antenna. The second frequency band is equivalent to the generation of a 1 / 4F antenna (Inverted-F Antenna, IFA) mode of the two branches of the T-shaped antenna. Specifically, the first radiating portion 121a supports the first resonant 1 / 4F antenna (Inverted-F Antenna, IFA) mode, and the second radiating portion 122a supports the second resonant 1 / 4IFA mode.

[0052] The first resonant current supported by the first radiating portion 121 a flows from the feeding point P to the first open end 121 , and correspondingly, the second resonant current supported by the second radiating portion 122 a flows from the feeding point P to the second open end 122 .

[0053] The antenna component 10 provided in the embodiment of the present application, the first radiating portion 121a supports the 1 / 4 IFA mode of the first resonance, and the second radiating portion 122a supports the 1 / 4 IFA mode of the second resonance, so that the antenna component 10 has dual resonance in the second frequency band. Therefore, the antenna component 10 provided in the embodiment of the present application has a wider bandwidth in the second frequency band, a higher sideband efficiency, and better antenna performance.

[0054] Please also read 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 the part where the inductive device replaces the 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. One end of the inductive device 131a is electrically connected to the feed source S, and the other end of the inductive device 131a is electrically connected to the feed point P. Fig. 9 visible, Fig. 9 The length of the radiator 120 of the antenna assembly 10 including the inductive device 131a in (b) is relatively small. In this embodiment, the antenna assembly 10 further includes a tuning circuit 130. The tuning circuit 130 includes a first sub-tuning circuit 131. The first sub-tuning circuit 131 is electrically connected between the feed source S and the feeding point P of the radiator 120, and the first sub-tuning circuit 131 is an inductive device for tuning the first frequency band.

[0055] In this embodiment, one end of the inductive device 131a 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 131a to the feeding point P of the radiator 120.

[0056] It should be noted that the so-called inductive device 131a refers to a device that exhibits inductive characteristics within the first frequency band supported by the antenna assembly 10. The inductive device 131a 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 131a exhibits inductive characteristics within the first frequency band supported by the antenna assembly 10.

[0057] Since the antenna assembly 10 provided in the embodiment of the present application has a feed point P whose orthographic projection on the floor 111 is located in the current weak point region 110a of the characteristic mode of the floor 111, the excitation current along the long side of the floor 111 can be well excited. The floor 111 of the circuit board 110 constitutes the main radiation branch of the first 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 device, becoming the excitation condition for the floor 111 of the circuit board 110 to work in the first 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 131 a is smaller.

[0058] In addition, the first sub-tuning circuit 131 of the tuning circuit 130 in the antenna assembly 10 is an inductive device, which can compensate for the lack of inductance caused by the miniaturization of the radiator 120, so that the antenna assembly 10 has better antenna performance in the first frequency band, and the antenna assembly 10 can work better in the first frequency band.

[0059] Please also read Figure 8 and Fig.10, Fig.10 In one embodiment Figure 8 The specific structural diagram of the antenna assembly is shown in FIG. In this embodiment, the first sub-tuning circuit 131 includes a first inductor L1. One end of the first inductor L1 is electrically connected to the feed source S, and the other end of the first inductor L1 is electrically connected to the feed point P. The first inductor L1 is used to adjust the operating frequency of the first frequency band.

[0060] The first inductor L1 may include at least one of the following situations: 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 exhibits inductive characteristics within the first frequency band supported by the antenna assembly 10.

[0061] In this embodiment, the first sub-tuning circuit 131 includes a first inductor L1, and the value of the first inductor L1 is different, and the frequency of the first frequency band is different. The larger the inductance value of the first inductor L1, the lower the first frequency band supported by the antenna assembly 10, and the smaller the inductance value of the first inductor L1, the higher the first frequency band supported by the antenna assembly 10. In other words, the first inductor L1 enables the antenna assembly 10 to support the set first frequency band according to the preset inductance value. When designing the antenna assembly 10, a suitable first inductor L1 can be selected according to the required range of the first frequency band. In one embodiment, when the antenna assembly 10 is designed, the inductance value of the first inductor L1 is not adjustable. In other embodiments, when the antenna assembly 10 is designed, the inductance value of the first inductor L1 is adjustable.

[0062] The first sub-tuning circuit 131 includes a first inductor L1, which can compensate for the lack of inductance caused by the miniaturization of the radiator 120, so that the antenna assembly 10 has better antenna performance in the first frequency band, and the antenna assembly 10 works better in the first frequency band.

[0063] Please also read Figure 8 and Fig.11 , Fig.11 In another embodiment Figure 8 The specific structural diagram of the antenna assembly is shown in FIG. In this embodiment, the first sub-tuning circuit 131 further includes a second inductor L2. 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 grounded. The second inductor L2 is used to adjust the resonance depth of the first frequency band.

[0064] The larger the resonance depth of the first frequency band, the higher the radiation efficiency of the first frequency band supported by the antenna component 10; correspondingly, the smaller the resonance depth of the first frequency band, the lower the radiation efficiency of the first frequency band supported by the antenna component 10. In other words, the second inductor L2 makes the resonance depth of the first frequency band supported by the antenna component 10 a preset depth (named as the first preset depth) according to a preset inductance value. When designing the antenna component 10, a suitable second inductor L2 can be selected according to the required resonance depth of the first frequency band. In one embodiment, when the antenna component 10 is designed, that is, in the finished antenna component 10, the inductance value of the second inductor L2 is not adjustable. In other embodiments, when the antenna component 10 is designed, that is, in the finished antenna component 10, the inductance value of the second inductor L2 is adjustable.

[0065] In the antenna component 10 provided in the embodiment of the present application, the first sub-tuning circuit 131 includes a second inductor L2, and the second inductor L2 is used to make the first frequency band supported by the antenna component 10 have a deeper resonance depth, thereby making the radiation efficiency of the first frequency band supported by the antenna component 10 higher.

[0066] Please also read Fig.12 , Fig.12 In another embodiment Figure 8 The specific structural diagram of the antenna assembly is shown in the figure. The antenna assembly 10 also includes a tuning circuit 130. The tuning circuit 130 includes a first sub-tuning circuit 131. The first sub-tuning circuit 131 is electrically connected between the feed source S and the feeding point P of the radiator 120, and the first sub-tuning circuit 131 is an inductive device for tuning the first frequency band.

[0067] The first sub-tuning circuit 131 is described above and will not be described again. In addition, the tuning circuit 130 further includes a second sub-tuning circuit 132. The second sub-tuning circuit 132 is used to tune the second frequency band, and the first sub-tuning circuit 131 is electrically connected to the feeding point P of the radiator 120 through the second sub-tuning circuit 132.

[0068] In this embodiment, the tuning circuit 130 includes a first tuning subcircuit and a second tuning subcircuit, the first tuning subcircuit and the second tuning subcircuit are connected in series to form a series unit, one end of the series unit is electrically connected to the feed source S, and the other end is short-connected to the feeding point P of the radiator 120. In other words, the feed source S is connected in series to the series unit to the feeding point P of the radiator 120.

[0069] The second sub-tuning circuit 132 is used to tune the second frequency band so that the antenna assembly 10 can operate in a required frequency band, and the antenna assembly 10 has better communication performance in the second frequency band.

[0070] Please also read Fig.13 , Fig.13 In another embodiment Fig.12 The specific structural diagram of the antenna assembly is shown in . The second sub-tuning circuit 132 includes a third inductor L3. One end of the third inductor L3 is electrically connected to the first sub-tuning circuit 131, and the other end of the third inductor L3 is electrically connected to the feeding point P of the radiator 120. The third inductor L3 is used to tune the operating frequency of the second frequency band.

[0071] In this embodiment, the second sub-tuning circuit 132 includes a third inductor L3, and the inductance value of the third inductor L3 is different, and the frequency of the second frequency band is different. The larger the inductance value of the third inductor L3, the lower the second frequency band supported by the antenna assembly 10, and the smaller the inductance value of the third inductor L3, the higher the second frequency band supported by the antenna assembly 10. In other words, the third inductor L3 enables the antenna assembly 10 to support the set second frequency band according to the preset inductance value. When designing the antenna assembly 10, a suitable third inductor L3 can be selected according to the required range of the second frequency band. In one embodiment, when the antenna assembly 10 is designed, the inductance value of the third inductor L3 is not adjustable. In other embodiments, when the antenna assembly 10 is designed, that is, in the finished antenna assembly 10, the inductance value of the third inductor L3 is adjustable.

[0072] The second sub-tuning circuit 132 includes a third inductor L3, which can compensate for the lack of inductance caused by the miniaturization of the radiator 120, so that the antenna component 10 has better antenna performance in the second frequency band, and the antenna component 10 works better in the second frequency band.

[0073] Please also read Fig.14 , Fig.14 In another embodiment Fig.12 Detailed structural diagram of the antenna assembly shown in . In this embodiment, the second sub-tuning circuit 132 includes a third inductor L3. One end of the third inductor L3 is electrically connected to the first sub-tuning circuit 131, and the other end of the third inductor L3 is electrically connected to the feeding point P of the radiator 120. The third inductor L3 is used to tune the operating frequency of the second frequency band.

[0074] In addition, the second sub-tuning circuit 132 further includes a tuning capacitor C. One end of the tuning capacitor C is electrically connected to the one end of the inductor, and the other end of the tuning capacitor C is grounded. The tuning capacitor C is used to adjust the resonance depth of the second frequency band.

[0075] For details of the third inductor L3, please refer to the previous description, which will not be repeated here. The greater the tuning depth of the second frequency band, the higher the radiation efficiency of the second frequency band supported by the antenna component 10; correspondingly, the smaller the tuning depth of the second frequency band, the lower the radiation efficiency of the second frequency band supported by the antenna component 10. In other words, the tuning capacitor C makes the resonance depth of the second frequency band supported by the antenna component 10 a preset depth (named as the second preset depth) according to the preset capacitance value. When designing the antenna component 10, a suitable tuning capacitor C can be selected according to the required resonance depth of the second frequency band. In one embodiment, when the antenna component 10 is designed, that is, in the finished antenna component 10, the capacitance value of the tuning capacitor C is not adjustable. In other embodiments, when the antenna component 10 is designed, that is, in the finished antenna component 10, the capacitance value of the tuning capacitor C is adjustable.

[0076] In one embodiment, the first frequency band includes any one of the GPS L5 frequency band, the B5 frequency band, the B8 frequency band and the B20 frequency band, and the second frequency band includes any one of the N78 frequency band, the N77 frequency band and the N79 frequency band.

[0077] The first frequency band and the second frequency band may be arbitrarily combined. For example, when the first frequency band is the GPS L5 frequency band, the second frequency band may be the N78 frequency band; when the first frequency band is the GPS L5 frequency band, the second frequency band may be the N77 frequency band; when the first frequency band is the GPS L5 frequency band, the second frequency band may be the N79 frequency band.

[0078] In one embodiment, when the first frequency band is the GPS L5 frequency band and the second frequency band is the N78 frequency band, when the first sub-tuning circuit 131 in the tuning circuit 130 includes a first inductor L1 and a second inductor L2, and the second sub-tuning circuit 132 includes a third inductor L3 and a tuning capacitor C, in one embodiment, the inductance value of the first inductor L1 may be 4.3nH, the inductance value of the second inductor L2 may be 2.2nH, the inductance value of the third inductor L3 may be 3.9nH, and the capacitance value of the tuning capacitor C may be 1.8pF.

[0079] See also Fig.15 , Fig.15 for Figure 1A schematic diagram of an electric field weak spot area in an antenna assembly is provided. The floor 111 includes a first side 1111 and a second side 1112 connected by a bend, wherein the length of the first side 1111 is greater than the length of the second side 1112. The electric current weak spot 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 of 1 / 16 of the wavelength of the first frequency band.

[0080] In the schematic diagram of this embodiment, the connection between the first side 1111 and the second side 1112 is an arc shape. The center O is the intersection of the extension line of the first side 1111 and the extension line of the second side 1112, and the center O is located outside the first side 1111 and the second side 1112. When the connection between the first side 1111 and the second side 1112 is a right angle, the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 is located on the first side 1111 and on the second side 1112.

[0081] The feed source S is located on the circuit board 110, and the orthographic projection of the feed point P on the floor 111 is located in the current weak point area 110a, and is located in a circular area with the intersection as the center O and 1 / 16 of the wavelength of the first frequency band as the radius R. It can be seen that the current weak point area 110a where the orthographic projection of the feed point P on the floor 111 is located is fan-shaped or fan-like.

[0082] When the current weak point area 110a is selected as an area with the intersection of the extension line of the first side 1111 and the extension line of the second side 1112 as the center O and 1 / 16 of the wavelength of the first frequency band as the radius R, the current in the area is relatively weak, and the orthographic projection of the feeding point P on the floor 111 is located within the area, which can further better excite the excitation current in the same extension direction of the first side 1111, so that the antenna assembly 10 has a higher radiation efficiency in the first frequency band.

[0083] Please read further Figure 5 The floor 111 includes two first sides 1111 disposed opposite to each other, and two second sides 1112 disposed opposite to each other. The number of the current weak point areas 110a is four. The positive projection of the feeding point P on the floor 111 is located in any one of the four current weak point areas 110a, and the radiator 120 is located in the current weak point area 110a adjacent to the feeding point P.

[0084] 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 disposed in 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). Please refer to Figure 1 and Figure 5 In this embodiment, the positive projection of the feeding point P on the floor 111 is taken as an example to be located in the current weak point area 110a(1). Accordingly, the radiator 120 is disposed adjacent to the current weak point area 110a(1).

[0085] See also Fig.16 , Fig.17 and Fig.18 , Fig.16 A schematic diagram of an antenna assembly provided in another embodiment of the present application; Fig.17 for Fig.16 The S-parameter diagram of the antenna assembly shown; Fig.18 for Fig.16 Schematic diagram of antenna radiation efficiency of the antenna assembly shown in FIG. In this embodiment, the radiator 120 is located in the lower left corner as an example. Fig.17 In the figure, the horizontal axis is the frequency in GHz, and the vertical axis is the S-Parameters in dB. Fig.17 The S1,1 curve is also called the reflection coefficient curve. As can be seen from the S parameter diagram, the first frequency band is the GPS L5 frequency band, and the resonant frequency point of the first frequency band is shown in FIG. Figure 7 Point 1 in the figure; the second frequency band is the N78 frequency band, wherein point 2 represents the resonant frequency of the first resonance (3.4458 GHz in the figure), and point 3 represents the resonant frequency of the second resonance (3.7535 GHz in the figure).

[0086] In the antenna assembly 10 provided in this embodiment, the second excitation signal excites the radiator 120 to generate the first resonance and the second resonance in the second frequency band. In other words, the antenna assembly 10 has dual resonance in the second frequency band. Compared with the related art, in which the radiator 120 has a single resonance in the second frequency band, the antenna assembly 10 provided in the embodiment of the present application has dual resonance in the second frequency band. Therefore, the antenna assembly 10 provided in the embodiment of the present application has a wider bandwidth in the second frequency band, a higher sideband efficiency, and better antenna performance.

[0087] exist Fig.18 In the figure, the horizontal axis is frequency in GHz, and the vertical axis is antenna efficiency (Efficiencies) in dB. Curve ① is the system radiation efficiency (System Rad. Efficiency) curve of the antenna assembly 10; curve ② is the system total efficiency (System Tot. Efficiency) curve of the antenna assembly 10. It can be seen from this simulation diagram that the antenna assembly 10 has good system radiation efficiency and good system total efficiency in both the first frequency band and the second frequency band, and the antenna performance of the antenna assembly 10 in the first frequency band and the second frequency band is good.

[0088] Please also read Fig.16 and Fig.19 , Fig.19 for Fig.16 A schematic diagram of the current distribution of the antenna assembly is provided. In this embodiment, the first frequency band supported by the antenna assembly 10 is the GPS L5 frequency band, and the second frequency band supported by the antenna assembly 10 is the N78 frequency band. Fig.19 (a) in Fig.16 The current distribution diagram of the antenna assembly 10 shown supports the GPS L5 frequency band; since the antenna assembly 10 supports the second frequency band, it is dual-resonant, therefore, Fig.19 (b) in Fig.16 The antenna assembly 10 shown is a schematic diagram of current distribution corresponding to the resonance with a lower resonance frequency in the dual resonance when supporting the N78 frequency band; Fig.19 (c) in Fig.16 The antenna assembly 10 shown is a schematic diagram of current distribution corresponding to the resonance with a higher resonance frequency in the dual resonance when supporting the N78 frequency band. Fig.19 As can be seen from (a) in FIG. 1 , the antenna assembly 10 stimulates the current on the floor 111 when supporting the first frequency band. Fig.19 As can be seen from (b) in FIG. 1 , the first radiation portion 121a of the radiator 120 has a larger current distribution on the first radiation portion 121a having a longer length, and the first radiation portion 121a supports the resonance with a lower resonance frequency in the second frequency band. Fig.19 As can be seen from (c), there is more current distribution on the second radiating portion 122a with a shorter length in the radiator 120, and the second radiating portion 122a supports resonance with a lower resonance frequency in the second frequency band.

[0089] See also Fig. 20 , Fig. 20 Schematic diagram of the location of the radiator in the antenna assembly provided for each implementation. Fig. 20In (a), part of the radiator 120 is arranged corresponding to the first side 1111, and the other part of the radiator 120 is arranged corresponding to the second side 1112. Fig. 20 In (b), the radiator 120 is disposed corresponding to the second side 1112. Fig. 20 In (c), the radiator 120 is arranged corresponding to the first side 1111. It can be seen that the arrangement 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 with other devices in the electronic device 1.

[0090] 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.

[0091] The electronic device 1 includes an antenna assembly 10 as provided in any of the above embodiments. Fig.21 , Fig.21 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.

[0092] 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.

[0093] In summary, the antenna assembly 10 provided in one embodiment of the present application combines a low-frequency miniaturized antenna solution with a T-type antenna to design an antenna assembly 10 with a smaller size and a wider high-frequency bandwidth. Since the size of the antenna assembly 10 is small, when the antenna assembly 10 is applied to an electronic device 1 such as a mobile phone (for example, a 5G mobile phone), it can be flexibly arranged in the electronic device 1. In addition, the performance of the antenna assembly 10 is improved compared to the performance of the traditional antenna assembly 10.

[0094] In addition, it should be noted that in one embodiment of the present application, the first frequency band may be a low frequency, and the second frequency band may be a high frequency, but this should not be understood as a limitation on the antenna assembly 10 provided in the embodiment of the present application. In other embodiments, the first frequency band may be a low frequency, and the second frequency band may be a medium frequency, etc. It should also be noted that in one embodiment of the present application, the antenna assembly 10 supporting the GPS L5 frequency band and the N78 frequency band is used as an example for illustration, and in other embodiments, the first frequency band may also be other working frequency bands in the low frequency band, and the second frequency band may be other working frequency bands in the high frequency band. In other words, the first frequency band and the second frequency band supported by the antenna assembly 10 provided in the embodiment of the present application are not limited to the combination of the GPS L5 frequency band and the N78 frequency band, but may also be a combination of other working frequency bands in the low frequency band and other working frequency bands in the high frequency band.

[0095] 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: floor; 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, the feed source is electrically connected to the feed point, the feed source is used to output a first excitation signal and a second excitation signal, the first excitation signal is used to excite the floor to support a first frequency band, and the second excitation signal is used to excite the radiator to support a second frequency band, wherein the frequency of the first frequency band is less than the frequency of the second frequency band.

2. The electronic device according to claim 1, wherein: The second excitation signal is used to excite the radiator to generate a first resonance and a second resonance within the second frequency band, wherein a resonance frequency of the first resonance is different from a resonance frequency of the second resonance.

3. The electronic device according to claim 2, characterized in that: The radiator includes a first radiating portion from the feeding point to the first open end, and a second radiating portion from the feeding point to the second open end, wherein the first radiating portion supports a 1 / 4 IFA mode of the first resonance, and the second radiating portion supports a 1 / 4 IFA mode of the second resonance.

4. The electronic device according to claim 1, wherein: The antenna assembly further includes a tuning circuit, the tuning circuit comprising: A first sub-tuning circuit, wherein the first sub-tuning circuit is electrically connected between the feed source and a feeding point of the radiator, and the first sub-tuning circuit is an inductive device, and is used for tuning the first frequency band.

5. The electronic device according to claim 4, characterized in that: The first sub-tuning circuit comprises: A first inductor, one end of the first inductor is electrically connected to the feed source, the other end of the first inductor is electrically connected to the feed point, and the first inductor is used to adjust the operating frequency of the first frequency band.

6. The electronic device according to claim 5, characterized in that: The first sub-tuning circuit also includes: A second inductor, one end of the second inductor is electrically connected to the other end of the first inductor, the other end of the second inductor is grounded, and the second inductor is used to adjust the resonance depth of the first frequency band.

7. The electronic device according to claim 4, characterized in that: The tuning circuit further comprises: A second sub-tuning circuit, where the second sub-tuning circuit is used to tune the second frequency band, and the first sub-tuning circuit is electrically connected to a feeding point of the radiator through the second sub-tuning circuit.

8. The electronic device according to claim 7, characterized in that: The second sub-tuning circuit comprises: A third inductor, one end of the third inductor is electrically connected to the first sub-tuning circuit, the other end of the third inductor is electrically connected to the feeding point of the radiator, and the third inductor is used to tune the operating frequency of the second frequency band.

9. The electronic device according to claim 8, characterized in that: The second sub-tuning circuit also includes: A tuning capacitor, one end of which is electrically connected to the one end of the inductor, and the other end of which is grounded, and the tuning capacitor is used to adjust the resonance depth of the second frequency band.

10. The electronic device according to claim 1, wherein: The first frequency band includes any one of the GPS L5 frequency band, the B5 frequency band, the B8 frequency band and the B20 frequency band, and the second frequency band includes any one of the N78 frequency band, the N77 frequency band and the N79 frequency band.

11. The electronic device according to any one of claims 1 to 10, characterized in that: The floor comprises 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, and the current weak point area is located in an area with the intersection of the extension line of the first side and the extension line of the second side as the center and 1 / 16 of the wavelength of the first frequency band as the radius.

12. The electronic device according to claim 10, 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.

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