A compact button antenna based on curved artificial magnetic conductor structure

Abstract

The application provides a compact button antenna based on a curved artificial magnetic conductor structure, which comprises a full fabric dielectric substrate, a microstrip line, a curved AMC structure, a metal column, a dielectric column, a top circular dielectric and a bottom circular dielectric; the bottom circular dielectric is fixedly connected to the full fabric dielectric substrate; the bottom circular dielectric, the metal column, the dielectric column and the top circular dielectric are sequentially connected, and the top circular dielectric and the bottom circular dielectric are oppositely arranged; the curved AMC structure is arranged between the top circular dielectric and the bottom circular dielectric, and the microstrip line is arranged on the full fabric dielectric substrate and located on the side close to the curved AMC structure. The application realizes compact design by bending the AMC reflecting surface, and makes the antenna more easily integrated into the corresponding system while maintaining the directional radiation ability of the antenna.

Description

Technical Field

[0001] This invention relates to the field of button antenna technology, and in particular to a compact button antenna based on a curved artificial magnetic conductor structure. Background Technology

[0002] The rapid development of 5G and smart grids is accelerating the integration of numerous communication and sensing devices into power grid systems, making compact antennas a key research focus. To ensure transmission performance, antennas must also possess high directivity. Therefore, researching button antennas with compact structures and directional radiation is essential. Summary of the Invention

[0003] The present invention aims to provide a compact button antenna based on a curved artificial magnetic conductor structure to solve the above-mentioned technical problems, thereby enabling the button antenna to have a more compact structure and directional radiation performance.

[0004] To address the aforementioned technical problems, this invention provides a compact button antenna based on a curved artificial magnetic conductor structure, comprising a fully woven dielectric substrate, a microstrip line, a curved AMC structure, a metal pillar, a dielectric pillar, and a top circular dielectric and a bottom circular dielectric.

[0005] The bottom circular medium is fixedly connected to the all-fabric dielectric substrate; the bottom circular medium, the metal pillar, the dielectric pillar and the top circular medium are connected in sequence, and the top circular medium and the bottom circular medium are arranged opposite to each other; the curved AMC structure is disposed between the top circular medium and the bottom circular medium, and the microstrip line is disposed on the all-fabric dielectric substrate and located on the side close to the curved AMC structure.

[0006] Furthermore, the axes of the metal column and the medium column overlap with the centers of the bottom circular medium and the top circular medium, and the bottom circular medium, the metal column, the medium column and the top circular medium are arranged in an I-shaped button configuration.

[0007] Furthermore, the curved surface of the curved AMC structure is semi-circular, and the center of the curved surface of the curved AMC structure, the center of the bottom circular medium, and the center of the top circular medium are located on the same straight line.

[0008] Furthermore, the radius of the bottom circular medium is equal to the radius of the top circular medium, and the radius of curvature of the outer surface of the curved AMC structure is smaller than the radius of the bottom circular medium.

[0009] Furthermore, the radius of curvature of the inner curved surface of the curved AMC structure is 4.4 mm, and the distance between the inner curved surface of the curved AMC structure and the edge of the metal column is 2.9 mm.

[0010] Furthermore, the curved AMC structure is composed of 3×3 unit structures arranged after bending along a cylinder with a radius of curvature of 4.4 mm.

[0011] Furthermore, the dielectric constant of the all-fabric dielectric substrate is 1.6, and the loss tangent is 0.02.

[0012] Furthermore, the metal pillar is embedded in the bottom circular medium, the medium pillar is superimposed on the metal pillar, and the top circular medium is loaded on the medium pillar.

[0013] Furthermore, the thickness of the all-fabric dielectric substrate is 1.5 mm, the length is 30 mm, and the width is 25 mm.

[0014] Furthermore, the overall height of the button antenna does not exceed 14mm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This invention provides a compact button antenna based on a curved artificial magnetic conductor structure, comprising an all-fabric dielectric substrate, a microstrip line, a curved AMC structure, a metal pillar, a dielectric pillar, and a top circular dielectric and a bottom circular dielectric. The bottom circular dielectric is fixedly connected to the all-fabric dielectric substrate. The bottom circular dielectric, the metal pillar, the dielectric pillar, and the top circular dielectric are sequentially connected, and the top and bottom circular dielectrics are arranged opposite to each other. The curved AMC structure is disposed between the top and bottom circular dielectrics, and the microstrip line is disposed on the all-fabric dielectric substrate and located on the side closer to the curved AMC structure. This invention achieves a compact design by bending the AMC reflector, making it easier to integrate into relevant systems while maintaining the antenna's directional radiation capability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the compact button antenna based on a curved artificial magnetic conductor structure provided by the present invention;

[0018] Figure 2 This is a front view of the compact button antenna based on a curved artificial magnetic conductor structure provided by the present invention;

[0019] Figure 3 This is a top view of the compact button antenna based on a curved artificial magnetic conductor structure provided by the present invention;

[0020] Figure 4 This is a side view of the compact button antenna based on a curved artificial magnetic conductor structure provided by the present invention;

[0021] Figure 5 This is a schematic diagram of the 3*3 curved surface AMC unit structure that bends along the cylindrical surface provided by the present invention;

[0022] Figure 6 This is a schematic diagram of a single curved surface AMC unit structure provided by the present invention;

[0023] Figure 7 This is a schematic diagram showing the variation of the reflection phase coefficient of the curved AMC structure provided by the present invention with frequency;

[0024] Figure 8 This is a schematic diagram showing the frequency variation of the reflection coefficient of the compact button antenna based on a curved artificial magnetic conductor structure provided by the present invention.

[0025] Figure 9 This is a polar coordinate far-field radiation diagram of the compact button antenna based on a curved artificial magnetic conductor structure provided by the present invention when φ=0°. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Please see Figure 1 This invention provides a compact button antenna based on a curved artificial magnetic conductor structure, comprising a fully woven dielectric substrate 1, a microstrip line 2, a curved AMC structure 3, a metal pillar 4, a dielectric pillar 5, a top circular dielectric 6, and a bottom circular dielectric 7;

[0029] The bottom circular medium 7 is fixedly connected to the all-fabric dielectric substrate 1; the bottom circular medium 7, the metal pillar 4, the dielectric pillar 5 and the top circular medium 6 are connected in sequence, and the top circular medium 6 and the bottom circular medium 7 are arranged opposite to each other; the curved AMC structure 3 is disposed between the top circular medium 6 and the bottom circular medium 7, and the microstrip line 2 is disposed on the all-fabric dielectric substrate 1 and located on the side close to the curved AMC structure 3.

[0030] In this embodiment of the invention, the axes of the metal column 4 and the medium column 5 overlap with the centers of the bottom circular medium 7 and the top circular medium 6, and the bottom circular medium 7, the metal column 4, the medium column 5 and the top circular medium 6 are arranged in the shape of an I-shaped button.

[0031] In this embodiment of the invention, the curved surface of the curved AMC structure 3 is semi-circular, and the center of the curved surface of the curved AMC structure 3, the center of the bottom circular medium 7, and the center of the top circular medium 6 are located on the same straight line.

[0032] In this embodiment of the invention, the radius of the bottom circular medium 7 is equal to the radius of the top circular medium 6, and the radius of curvature of the outer surface of the curved AMC structure 3 is smaller than the radius of the bottom circular medium 7.

[0033] In this embodiment of the invention, the inner curved surface of the curved AMC structure 3 has a radius of curvature of 4.4 mm, and the inner curved surface of the curved AMC structure 3 is 2.9 mm away from the edge of the metal column 4.

[0034] In this embodiment of the invention, the curved surface AMC structure 3 is further composed of 3×3 unit structures arranged after bending along a cylinder with a curvature radius of 4.4mm.

[0035] In this embodiment of the invention, the dielectric constant of the all-fabric dielectric substrate 1 is 1.6 and the loss tangent is 0.02.

[0036] In this embodiment of the invention, the metal pillar 4 is further embedded in the bottom circular medium 7, the medium pillar 5 is superimposed on the metal pillar 4, and the top circular medium 6 is loaded on the medium pillar 5.

[0037] In this embodiment of the invention, the all-fabric dielectric substrate 1 has a thickness of 1.5 mm, a length of 30 mm, and a width of 25 mm.

[0038] In this embodiment of the invention, the overall height of the button antenna is no more than 14mm.

[0039] It should be noted that, in view of the characteristics of the future smart grid system proposed in the background art, the embodiments of the present invention load an artificial magnetic conductor (AMC) to enable the antenna to unidirectional radiation, and then bend the artificial magnetic conductor to make the structure surrounding the monopole antenna more compact and achieve high-performance radiation in a certain direction, thereby achieving the compact miniaturization of the antenna while ensuring unidirectional radiation.

[0040] Please see Figures 1 to 6 Based on the above scheme, to facilitate a better understanding of the compact button antenna based on a curved artificial magnetic conductor structure provided in the embodiments of the present invention, the following detailed description is provided:

[0041] This invention provides a compact button antenna based on a curved artificial magnetic conductor structure suitable for smart grids. The antenna includes a fully woven dielectric substrate 1, a microstrip line 2, a curved AMC structure 3, a metal pillar 4, a dielectric pillar 5, a top circular dielectric 6, and a bottom circular dielectric 7. The microstrip line 2 is located on the fully woven dielectric substrate 1 near the curved AMC structure 3. The curved AMC structure 3 is composed of 3*3 unit structures arranged after bending along a cylinder with a radius of curvature of 4.4 mm, and is 2.9 mm away from the metal pillar 4. The dielectric pillar 5 is superimposed on the metal pillar 4. The bottom circular dielectric 7 and the top circular dielectric 6 are located at the bottom of the metal pillar 4 and the top of the dielectric pillar 5, respectively, thus forming the button antenna structure.

[0042] The all-fabric dielectric substrate 1 uses all-fabric dielectric material, which has good dielectric performance, with a dielectric parameter of 1.6 and a loss tangent of 0.02. The all-fabric dielectric substrate 1 has a thickness of 1.5 mm, a length of 30 mm, and a width of 25 mm, which makes it very compact.

[0043] The medium column 5 is superimposed on the metal column 4, and has the same radius as the metal column 4.

[0044] The top circular medium 6 is located above the medium column 5, forming a button shape, and at the same time, it has a certain fixing effect on the medium column 5.

[0045] The bottom circular medium 7 has the metal pillar 4 embedded in the middle, which has a certain fixing effect on the metal pillar 4, and the circular medium with dielectric constant has a certain matching effect.

[0046] The curved AMC structure 3 is located next to the button antenna, which is composed of the top circular dielectric 6, the bottom circular dielectric 7, the metal pillar 4, and the dielectric pillar 5, at a distance of 2.9 mm from the metal pillar 4. The curved AMC structure 3 is composed of 3*3 units arranged after bending along a cylinder with a radius of curvature of 4.4 mm, forming a columnar reflector surface, realizing a close-range, compact in-phase reflection structure, which is the key to forming the directional radiation of the compact button antenna.

[0047] The microstrip line 2 is located on the side of the all-fabric dielectric substrate 1 near the curved AMC structure 3, and is approximately one-quarter wavelength long, thus serving as a matching, feeding, and balun.

[0048] The size of the microstrip line 2 on the all-fabric dielectric substrate 1 can adjust the antenna matching and gain.

[0049] Please see Figure 7 This is a schematic diagram showing the reflection phase coefficient of the curved AMC structure 3 as a function of frequency. It can be seen that the designed curved AMC structure 3 satisfies the zero-degree in-phase reflection condition at the 5.8 GHz frequency point.

[0050] Please see Figure 8 This is a schematic diagram showing the reflection coefficient of a button antenna as a function of frequency. It can be seen that after loading the curved AMC structure 3, the antenna's impedance matching remains good.

[0051] Please see Figure 9 The figure shows the far-field radiation diagram of the button antenna in polar coordinates when φ = 0°. It can be seen that the button antenna provided in this embodiment of the invention can produce significant directional radiation.

[0052] Compared to existing technologies, the button antenna proposed in this embodiment of the invention has an overall height of 14mm. By bending the AMC reflector, a compact design is achieved, making it easier to integrate into the corresponding system while maintaining the antenna's directional radiation capability.

[0053] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A compact button antenna based on a curved artificial magnetic conductor structure, characterized in that, Including fully fabric dielectric substrates, microstrip lines, curved AMC structures, metal pillars, dielectric pillars, and top and bottom circular dielectrics; The bottom circular medium is fixedly connected to the all-fabric dielectric substrate; the bottom circular medium, the metal pillar, the dielectric pillar and the top circular medium are connected in sequence, and the top circular medium and the bottom circular medium are arranged opposite to each other; the curved AMC structure is disposed between the top circular medium and the bottom circular medium, and the microstrip line is disposed on the all-fabric dielectric substrate and located on the side close to the curved AMC structure.

2. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 1, characterized in that, The axes of the metal column and the medium column overlap with the centers of the bottom circular medium and the top circular medium, and the bottom circular medium, the metal column, the medium column and the top circular medium are arranged in an I-shaped button.

3. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 1, characterized in that, The curved surface of the AMC structure is semi-circular, and the center of the curved surface of the AMC structure, the center of the bottom circular medium, and the center of the top circular medium are on the same straight line.

4. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 3, characterized in that, The radius of the bottom circular medium is equal to the radius of the top circular medium, and the radius of curvature of the outer surface of the curved AMC structure is smaller than the radius of the bottom circular medium.

5. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 4, characterized in that, The inner curved surface of the curved AMC structure has a radius of curvature of 4.4 mm, and the distance between the inner curved surface of the curved AMC structure and the edge of the metal column is 2.9 mm.

6. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 1, characterized in that, The curved AMC structure is composed of 3×3 unit structures arranged after bending along a cylinder with a curvature radius of 4.4 mm.

7. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 1, characterized in that, The dielectric constant of the all-fabric dielectric substrate is 1.6, and the loss tangent is 0.

02.

8. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 1, characterized in that, The metal pillar is embedded in the bottom circular medium, the medium pillar is superimposed on the metal pillar, and the top circular medium is loaded on the medium pillar.

9. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 1, characterized in that, The all-fabric dielectric substrate has a thickness of 1.5 mm, a length of 30 mm, and a width of 25 mm.

10. The compact button antenna based on a curved artificial magnetic conductor structure according to claim 1, characterized in that, The overall height of the button antenna does not exceed 14mm.

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