Antenna and electronic device

Abstract

The application relates to an antenna and an electronic device, and the antenna of an embodiment of the application is provided with a decoupling unit between two antenna units to improve the isolation of the antenna. The decoupling unit is formed by part or all of the grids in the pixelated area, and whether (0 or 1) the grid in the pixelated area is provided with a conductor is encoded and optimized through an algorithm of the pixelated antenna, so that the design and optimization of the antenna isolation are simplified.

Description

Technical Field

[0001] This application belongs to the field of antenna technology, and in particular relates to an antenna and electronic device. Background Technology

[0002] With the evolution of Wi-Fi protocols, the number of antennas in home routers is increasing. How to deploy more antennas within the limited space of the router casing while maintaining high isolation between them is currently a bottleneck problem in the development of antenna solutions for miniaturized home wireless communication devices.

[0003] Several methods have been proposed in existing technologies to improve antenna isolation in multi-antenna systems. These mainly include using decoupling parasitic elements, defective grounding, metamaterial structures, and decoupling networks. These methods typically involve adding circuit structures or parasitic elements between adjacent antenna units. By carefully designing the configuration of these new circuit structures / parasitic elements, antenna decoupling is achieved. It is worth noting that these new circuit structures / parasitic elements generally take the form of closed polygons. Developers need to carefully optimize the dimensional parameters of these closed polygons during the design process to improve isolation. For scenarios requiring broadband or multi-frequency decoupling, the configuration of these circuit structures and parasitic elements is often more complex, the workload and difficulty of dimensional parameter tuning are greater, and they rely heavily on expert experience, often failing to reach the antenna's performance limits. Utility Model Content

[0004] The purpose of this application is to provide an antenna and electronic device that aims to solve the problem of complex design and tuning methods for traditional antenna isolation.

[0005] In a first aspect, embodiments of this application provide an antenna, including a first antenna element, a second antenna element, and a pixelated region. The pixelated region is located between the first antenna element and the second antenna element. The pixelated region is divided into multiple grids arranged in an array for filling conductors. At least a portion of the multiple grids are provided with conductors to form decoupling units.

[0006] In some embodiments, the mesh of the decoupling unit is a copper-clad mesh.

[0007] In some embodiments, a first substrate is included, wherein the first antenna unit, the second antenna unit, and the pixelated region are all disposed on the same layer or different layers of the first substrate.

[0008] In some embodiments, a first substrate and a second substrate are included, wherein the first antenna element and the second antenna element are both located on the first substrate, and the pixelated region is located on the second substrate;

[0009] The first substrate and the second substrate are stacked; or

[0010] The second substrate is erected on the first substrate and is located between the first antenna element and the second antenna element.

[0011] In some embodiments, the grid of the decoupling unit and the first antenna unit form a first mutual coupling capacitor group, the first mutual coupling capacitor group including at least one first mutual coupling capacitor, and the distance between the grid of the decoupling unit and the first antenna unit is negatively correlated with the capacitance value of the first mutual coupling capacitor.

[0012] In some embodiments, the grid of the decoupling unit and the first antenna unit form a second mutual coupling capacitor group, the second mutual coupling capacitor group including at least one second mutual coupling capacitor, and the distance between the grid of the decoupling unit and the second antenna unit is negatively correlated with the capacitance value of the second mutual coupling capacitor.

[0013] In some embodiments, an autocoupling capacitor is formed between two non-contiguous and directly opposite grids in the decoupling unit, and the capacitance of the autocoupling capacitor is negatively correlated with the distance between the two grids.

[0014] In some embodiments, adjacent autocoupling capacitors are connected in series or in parallel.

[0015] In some embodiments, an autoinductor is formed between two consecutive and opposite grids in the decoupling unit, and the inductance value of the autoinductor is negatively correlated with the distance between the two grids.

[0016] Secondly, embodiments of this application provide an electronic device including the antenna described above.

[0017] The beneficial effects of this application embodiment compared with related technologies are: the antenna of this application embodiment improves the antenna isolation by setting a decoupling unit between two antenna elements. The decoupling unit is formed by setting conductors in some or all of the multiple grids in the pixelated region. Whether conductors (0 or 1) are set in the multiple grids of the pixelated region is encoded and optimized by the pixelated antenna algorithm, thus simplifying the design and optimization of antenna isolation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the antenna structure provided in one embodiment of this application;

[0019] Figure 2 A diagram showing the one-to-one correspondence encoding string, lattice encoding, and decoupling unit of an antenna provided in an embodiment of this application;

[0020] Figure 3This is a schematic diagram of the structure of a dipole antenna provided in one embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the structure of a monopole antenna provided in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the structure of a PIFA antenna provided in one embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of a microstrip patch antenna provided in one embodiment of this application;

[0024] Figure 7 This is a schematic diagram of the structure of an onboard antenna provided in one embodiment of this application;

[0025] Figure 8 This is a schematic diagram of the structure of an onboard antenna provided in one embodiment of this application;

[0026] Figure 9 This is a schematic diagram of the structure of an onboard antenna provided in one embodiment of this application;

[0027] Figure 10 This is a schematic diagram of the formation of mutual coupling capacitors in an antenna provided in an embodiment of this application;

[0028] Figure 11 This is a schematic diagram of an antenna forming an autocoupling capacitor according to an embodiment of this application;

[0029] Figure 12 This is a schematic diagram of an antenna forming a series self-coupling capacitor according to an embodiment of this application;

[0030] Figure 13 This is a schematic diagram of a parallel autocoupling capacitor formed in an antenna according to an embodiment of this application;

[0031] Figure 14 This is a schematic diagram of an antenna forming an autocoupling inductor according to an embodiment of this application;

[0032] Figure 15 This is a schematic diagram of a complex decoupling unit formed in an antenna according to an embodiment of this application;

[0033] Figure 16 This application demonstrates a comparison of the performance and technical effects of the pixelated region of the antenna provided in one embodiment of the present application when applied to single-frequency decoupling, multi-frequency decoupling, and wideband decoupling using the S21 curve.

[0034] Figure 17 The decoupling effect of the decoupling unit based on the existing technology is shown based on curves S11, S21, and S22.

[0035] Figure 18The decoupling effect of the decoupling unit in the embodiment of this application is shown based on curves S11, S21, and S22. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In traditional onboard antennas, antenna decoupling is represented by continuous copper-clad regions to characterize the decoupling network or decoupling parasitic elements. These continuous copper-clad regions are primarily closed polygons, and the antenna configuration can usually be comprehensively described using a dozen or more dimensional parameters (such as the length and width of a rectangle). When designers use these decoupling networks / parasitic elements to optimize antenna isolation, they need to iterate through a dozen or even dozens of dimensional parameters to achieve performance optimization. This optimization method relies heavily on expert experience and often fails to reach the performance ceiling. Furthermore, for complex antenna decoupling requirements, such as multi-frequency decoupling and broadband decoupling, the configuration complexity of the introduced decoupling networks / parasitic elements increases significantly, making the problems of high debugging difficulty and workload even more pronounced.

[0041] One embodiment of this application proposes an antenna based on a pixelated antenna decoupling method. This antenna can be used in any communication electronic device, such as a router. Through a reasonable gridded / pixelated layout, this antenna improves antenna isolation performance and enhances antenna design and tuning efficiency. Please refer to... Figure 1 An embodiment of this application proposes an antenna 100, including a first antenna element 110, a second antenna element 120, and a pixelated region 130. The pixelated region 130 is located between the first antenna element 110 and the second antenna element 120. The pixelated region 130 is divided into a plurality of grids 131 arranged in an array for filling conductors. At least a portion of the grids 131 are provided with conductors to form decoupling units 132.

[0042] A pixelated region 130 is provided between the first antenna element 110 and the second antenna element 120. Unlike traditional decoupling networks / decoupling parasitic units based on closed polygons, the pixelated region 130 is a grid matrix 131, and its specific configuration is represented using binary encoding: 0 indicates that the grid 131 is not filled with conductors, and 1 indicates that the grid 131 is filled with conductors, such as copper plating on a circuit board. Therefore, the grid 131 of the formed decoupling unit 132 is a copper-plated grid 131. In an alternative embodiment, the grid 131 is filled with conductors, such as copper plates.

[0043] In this embodiment, a target isolation value is set, and then the binary code representing whether the pixelated region 130 is filled with conductor is optimized and iterated through an algorithm so that the configuration effect of the decoupling unit 132 approaches or exceeds the set target isolation value, and finally the effect of improving the inter-system isolation of the antenna 100 is achieved.

[0044] In some embodiments, the arrangement direction of the first antenna element 110 and the second antenna element 120 is a first direction, and the direction perpendicular to the first direction is a second direction. The length of the pixelated region 130 in the second direction is not less than λ / 4, where λ is the wavelength corresponding to the operating frequency of the antenna 100. In this way, the decoupling unit 132 can realize the basic resonant decoupling function. The size of the pixelated region 130 in the first direction is not strictly constrained, as long as it is at least greater than the width of a grid 131.

[0045] In some embodiments, the pixelated grid 131 is rectangular (or square), and the length of the longer side of a single grid 131 should not exceed 0.1λ to provide a sufficient number of grids 131 to achieve fine-grained encoding of the pixelated region 130, expand the solution space of the pixelated region 130, and improve the performance ceiling of the decoupling unit 132. For example, if N pixels are used to encode the pixelated region 130, then the number of decoupling units 132 that can be configured is 2. N If N is taken as 150, then in 2150 Among the possible configurations of decoupling unit 132, the configuration with the best performance is preferred. 2 150 Within a solution space of magnitude [value missing], it is guaranteed that the optimal configuration of the decoupling unit 132, whose performance meets the design requirements, can be obtained. (See also...) Figure 2 This is a schematic diagram of the configuration of a one-to-one binary code string, a corresponding pixel grid 131 code, and a corresponding decoupling unit 132 in one embodiment.

[0046] The first antenna element 110 and the second antenna element 120 can be, but are not limited to, a dipole antenna 100, a monopole antenna 100, a PIFA (Planar Inverted-F Antenna), a loop antenna 100, or a microstrip antenna 100. Implementation details for various variations are as follows:

[0047] Figure 3 The first antenna element 110 and the second antenna element 120 shown are examples of a dipole antenna 100. The dipole antenna 100 can be selected as a half-wave dipole, a full-wave dipole, a 1.5 times wavelength dipole, an electrically small dipole, etc. The pixelated region 130 is located on the axis of symmetry of the first antenna element 110 and the second antenna element 120, and its length in the first direction is greater than λ / 2 to achieve better isolation effect.

[0048] Figure 4 The first antenna element 110 and the second antenna element 120 shown are examples of a monopole antenna 100. Figure 5 The first antenna element 110 and the second antenna element 120 shown are examples of PIFA. In these two examples, the pixelated region 130 is located on the axis of symmetry of the first antenna element 110 and the second antenna element 120. The length of the pixelated region 130 in the first direction is greater than λ / 4, and it is recommended to connect it to the ground to solve the decoupling problems of near-field coupling and ground conduction.

[0049] Figure 6 The first antenna element 110 and the second antenna element 120 shown are examples of a microstrip patch antenna 100. The pixelated region 130 has a length greater than λ / 2 in the first direction and is located on the axis of symmetry of the first antenna element 110 and the second antenna element 120.

[0050] It is understandable that, given a sufficient number of pixel encoding bits, i.e., the number of grids 131, the possible configurations of the pixelated region 130 for the decoupling units 132 are extremely large. Therefore, for MIMO antenna 100 systems composed of different antenna units 100, adaptation can be made by adjusting the encoding bits and encoding content of the pixelated region 130 to meet the antenna decoupling requirements of various MIMO antenna 100 systems.

[0051] When the pixelated region 130 is configured in conjunction with the antenna elements, it is permissible to place it on the same plane, perpendicular to each other, on different layers, or staggered vertically. This is acceptable as long as the pixelated region 130 is located within two or more antenna elements, between adjacent antenna elements.

[0052] Please see Figure 7 In some embodiments, the antenna 100 includes a first substrate, and the first antenna unit 110, the second antenna unit 120 and the pixelated region 130 are all arranged on the same layer or different layers of the first substrate.

[0053] For example, the first antenna unit 110, the second antenna unit 120 and the pixelated region 130 are all arranged on the same surface of the first substrate, that is, the same layer. Figure 7 This is an embodiment of decoupling a MIMO antenna 100 based on a pixelated region 130 on a single-sided substrate (e.g., PCB). The first antenna element 110 and the second antenna element 120 are full-wave dipole antennas 100. The length of a single antenna 100 is λ, and they are distributed in a left-right mirror symmetrical manner. A pixelated region 130 is loaded in the middle to improve the isolation of the antenna 100.

[0054] For example, the first antenna unit 110 and the second antenna unit 120 are arranged on the first surface of the first substrate, and the pixelated regions 130 are all arranged on the intermediate layer of the first substrate or on the second surface opposite to the first surface.

[0055] Please see Figure 8 In some embodiments, the antenna 100 includes a first substrate and a second substrate, the first antenna unit 110 and the second antenna unit 120 are both located on the first substrate, the pixelated region 130 is located on the second substrate, and the first substrate and the second substrate are stacked.

[0056] Please see Figure 9 In some embodiments, the antenna 100 includes a first substrate and a second substrate, with the first antenna unit 110 and the second antenna unit 120 both located on the first substrate, and the second substrate erected on the first substrate and located between the first antenna unit 110 and the second antenna unit 120.

[0057] The pixelated region 130 achieves an equivalent decoupling circuit through the parasitic capacitance, inductance, and series-parallel effects generated between multiple pixel grids 131 and between the pixel grids 131 and the two antenna elements, thereby improving the isolation of the antenna 100. Furthermore, because the pixelated region 130 offers a vast solution space for the possible configurations of the decoupling unit 132, the resulting equivalent decoupling circuit is highly functional, capable of satisfying multi-frequency, wideband, same-frequency, and different-frequency decoupling functions.

[0058] Please see Figure 10 In some embodiments, the grid 131 of the decoupling unit 132 and the first antenna unit 110 form a first mutual coupling capacitor group, the first mutual coupling capacitor group including at least one first mutual coupling capacitor, and the distance between the grid 131 of the decoupling unit 132 and the first antenna unit 110 is negatively correlated with the capacitance value of the first mutual coupling capacitor. In some embodiments, the grid 131 of the decoupling unit 132 and the first antenna unit 110 form a second mutual coupling capacitor group, the second mutual coupling capacitor group including at least one second mutual coupling capacitor, and the distance between the grid 131 of the decoupling unit 132 and the second antenna unit 120 is negatively correlated with the capacitance value of the second mutual coupling capacitor.

[0059] A capacitive effect can be formed between the pixel grid 131 of the pixelated region 130 and the two antenna elements. Without loss of generality, we will discuss a single antenna element and its neighboring grids 131. Pixel grids 131 with an encoding value of 1 will form a copper-clad area within the isolation strip. The copper-clad area as a whole will form a mutual coupling effect with the antenna elements, which is equivalent to a mutual coupling capacitance between the antenna 100 and the decoupling unit 132. Pixel grids 131 with an encoding value of 0 are used to adjust the overall size and shape of the copper-clad area and the distance between the copper-clad area and the antenna elements, thereby adjusting the coupling capacitance. Multiple pixel grids 131 work together to finely adjust the total mutual coupling capacitance between the pixelated region 130 and the antenna elements.

[0060] Figure 10 An embodiment is shown where multiple pixel grids 131 collaboratively adjust the mutual coupling capacitance between the pixelated region 130 and the antenna element. When multiple pixel grids 131 adjacent to the antenna element are assigned a value of 1 / copper plating, a mutual coupling capacitance C is formed between the copper-plated pixel grid 131 and the adjacent antenna element. i The mutual coupling capacitance formed by a single pixel grid 131 satisfies the following relationship:

[0061] C i ∝w / d

[0062] Where i represents the pixel grid number 1 to N, w represents the side length of a single pixel grid 131, and d represents the closest distance between the current row of pixel grid 131 and the antenna element. Clearly, when the pixel grid 131 adjacent to the antenna element is assigned a value of 0, it is equivalent to increasing d, thereby reducing the mutual coupling capacitance C. i The effect; when the number of all pixels in row 131 is 0, the mutual coupling capacitance C of that row of pixels 131... i =0. The maximum total mutual coupling capacitance (i.e., the first mutual coupling capacitor group or the second mutual coupling capacitor group) between the pixelated region 130 and an antenna element is:

[0063] C 互耦=C1∥C2∥C3...∥C N

[0064] Obviously, we can adjust the total mutual coupling capacitance of the pixelated region 130 by adjusting the pixel encoding content, thereby controlling the energy transfer effect of the pixelated region 130 between the two antenna elements, so that the energy transferred through the pixelated region 130 cancels out the original mutual coupling energy between the antenna elements, and finally achieves decoupling between the antennas 100.

[0065] Please see Figure 11 In some embodiments, a self-coupling capacitor C is formed between two non-contiguous and opposite grids 131 in the decoupling unit 132. k Autocoupling capacitor C k The capacitance is negatively correlated with the distance between the two grids 131. Here, k is a positive integer.

[0066] An autocoupling capacitor C can be formed inside the pixelated region 130. k Without loss of generality, we will discuss multiple adjacent pixel grids 131 within the pixelated region 130. When discontinuous points exist between pixel grids 131 (pixel grids 131 encoded as 1 are interspersed with pixel grids 131 encoded as 0), an autocoupling capacitor C will be formed. k Autocoupling capacitor C k The size can be controlled by encoding; for example, by inserting multiple pixel grids 131 with a code of 0, the self-coupling capacitance C can be reduced. k The effect. Furthermore, multiple adjacent autocoupling capacitors C k It can also be connected in series (see) Figure 12 ) and parallel (see Figure 13 The multiple pixel grids 131 within the pixelated region 130 work together to finely control the autocoupling capacitor C. k The effect.

[0067] Please see Figure 14 In some embodiments, an autoinductor L is formed between two consecutive and opposite grids 131 in the decoupling unit 132. n Autoinductor L n The inductance value is negatively correlated with the distance between the two grids 131.

[0068] An autoinductor L can also be formed within the pixelated region 130. n The current path formed by multiple pixel grids 131 will create an inductive loading effect. For example... Figure 14 As shown. The size of the encoding within the pixelated region 130 can control the length and thickness of the current path, thereby controlling the size of the autoinductor—the longer the current path, the more equivalent it is to multiple autoinductors L. nSeries connection increases self-inductance; the wider the current path, the more equivalent it is to multiple autotransformers L. n Parallel connection reduces self-inductance. The encoding of the pixelated region 130 can also create current folding, which in turn increases self-inductance. The synergistic effect of multiple pixel grids 131 within the pixelated region allows for fine-tuning of the autotransformer L. n The effect.

[0069] By optimizing the encoded content of pixelated region 130, the mutual coupling capacitor C can be achieved. i Autotransformer C k and autotransformer L n The size can be finely adjusted, and capacitors and inductors can be combined in series and parallel to realize complex decoupling units 132. As the number of codes increases, the decoupling unit 132 will have more diverse forms and a higher upper limit for decoupling capability, such as realizing functions such as same-frequency decoupling, different-frequency decoupling, broadband decoupling, and multi-frequency decoupling. Figure 15 This demonstrates a 3×3 pixel grid of 131 pixels separated by mutual coupling capacitor C. i Autocoupling capacitor C k and autotransformer L n An embodiment of the synergistic effect to achieve complex decoupling unit 132.

[0070] The antenna 100 provided in this application embodiment is highly versatile and can be adapted to various MIMO antenna 100 systems of different forms.

[0071] The design method is simple. The main structure of the decoupling unit 132 can be designed by inserting pixelated regions 130 into different units. Unlike the traditional decoupling work of antenna 100, there is no need to develop a complex decoupling unit 132 or decoupling circuit based on closed polygons.

[0072] The configuration optimization of the decoupling unit 132 in this embodiment is carried out through an optimization algorithm, which can reduce the reliance on the designer's expert experience and optimize the isolation strip configuration based on computer computing power, thereby reducing the time cost for the antenna 100 designer.

[0073] Since the pixelated region 130 can achieve the mutual coupling capacitor C through pixel encoding, i Autotransformer C k and autotransformer L n The pixelated area has excellent decoupling bandwidth characteristics due to the fine control of its size and the formation of various decoupling equivalent circuits. It can be used for single-frequency decoupling, multi-frequency decoupling, and broadband decoupling in various scenarios. Figure 16 The technical effects of applying pixelated region 130 to single-frequency decoupling, multi-frequency decoupling, and wideband decoupling are demonstrated, resulting in an improvement in the performance of S21. Figure 17The decoupling effect of the conventional method, consisting of decoupling units 132 and pixelated regions 130 in the form of closed continuous polygons, is demonstrated. Figure 18 This paper demonstrates the decoupling unit 132 of the pixelated region 130 and the decoupling effect of the pixelated region 130 according to an embodiment of this application. A comparison shows that the pixelated region 130, after algorithm-optimized encoding, performs better than the traditional decoupling unit 132. The pixelated region 130 can achieve a full-band isolation of better than 30dB within the core operating frequency band of 5-6GHz, while the traditional isolation bar can only achieve better than 30dB at some frequency points. Therefore, the pixelated region 130 has superior bandwidth performance.

[0074] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An antenna, characterized in that, It includes a first antenna element, a second antenna element, and a pixelated region. The pixelated region is located between the first antenna element and the second antenna element. The pixelated region is divided into multiple grids arranged in an array for filling conductors. At least some of the grids are provided with conductors to form decoupling units.

2. The antenna as described in claim 1, characterized in that, The decoupling unit has a copper-clad mesh.

3. The antenna as described in claim 1, characterized in that, It includes a first substrate, and the first antenna unit, the second antenna unit, and the pixelated region are all arranged on the same layer or different layers of the first substrate.

4. The antenna as claimed in claim 1, characterized in that, It includes a first substrate and a second substrate, wherein the first antenna element and the second antenna element are both located on the first substrate, and the pixelated region is located on the second substrate; The first substrate and the second substrate are stacked together; or The second substrate is erected on the first substrate and is located between the first antenna element and the second antenna element.

5. The antenna as described in any one of claims 1 to 4, characterized in that, The grid of the decoupling unit and the first antenna unit form a first mutual coupling capacitor group. The first mutual coupling capacitor group includes at least one first mutual coupling capacitor. The distance between the grid of the decoupling unit and the first antenna unit is negatively correlated with the capacitance value of the first mutual coupling capacitor.

6. The antenna as described in any one of claims 1 to 4, characterized in that, The grid of the decoupling unit and the first antenna unit form a second mutual coupling capacitor group. The second mutual coupling capacitor group includes at least one second mutual coupling capacitor. The distance between the grid of the decoupling unit and the second antenna unit is negatively correlated with the capacitance value of the second mutual coupling capacitor.

7. The antenna as claimed in any one of claims 1 to 4, characterized in that, In the decoupling unit, a self-coupling capacitor is formed between two non-contiguous and directly opposite grids, and the capacitance value of the self-coupling capacitor is negatively correlated with the distance between the two grids.

8. The antenna as claimed in claim 7, characterized in that, The adjacent autocoupling capacitors are connected in series or in parallel.

9. The antenna as claimed in any one of claims 1 to 4, characterized in that, An autoinductor is formed between two consecutive and directly opposite grids in the decoupling unit, and the inductance value of the autoinductor is negatively correlated with the distance between the two grids.

10. An electronic device, characterized in that, Including the antenna as described in any one of claims 1 to 9.

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