High-directivity columnar convex surface conformal reflector antenna based on meta-surfaces

A metasurface and reflective surface technology, applied in antennas, electrical components, etc., can solve problems such as beam calibration of convex mirrors that cannot be solved, and achieve the effect of versatility

Active Publication Date: 2018-01-12
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above methods can effectively conformally design the parabolic reflector of the traditional reflector antenna into a planar refle

Method used

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  • High-directivity columnar convex surface conformal reflector antenna based on meta-surfaces
  • High-directivity columnar convex surface conformal reflector antenna based on meta-surfaces
  • High-directivity columnar convex surface conformal reflector antenna based on meta-surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] refer to figure 1 , a highly directional cylindrical convex conformal reflector antenna based on a metasurface, including a cylindrical convex carrier 1, a convex mirror 2, a feed source 3, a coaxial conversion joint 4 and a support structure 5, and the convex mirror 2 consists of 12× It is composed of 9 periodically arranged planar rectangular discrete metasurfaces 21, which are embedded on the convex surface of the cylindrical convex surface carrier 1 with the same curvature radius to form a reflective surface structure, and the center of the convex mirror 2 is used as the coordinate origin to establish a Cartesian coordinate system , the x-axis is parallel to the horizontal plane of the convex mirror 2, the y-axis is parallel to the vertical plane of the convex mirror 2, the curvature radius of the convex mirror 2 is r=210mm, and the focal length is f L =80mm, the feed source 3 adopts a standard WR62 waveguide with an inner section width of 15.799mm, a height of 7.89...

Embodiment 2

[0039] Embodiment 2, the present embodiment has the same structure as Embodiment 1, and the following parameters have been adjusted:

[0040] The convex mirror 2 is composed of 8×9 planar rectangular discrete metasurfaces 21 periodically arranged, that is, m=8.

Embodiment 3

[0041] Embodiment 3, the present embodiment has the same structure as Embodiment 1, and the following parameters have been adjusted:

[0042] The convex mirror 2 is composed of 10×9 planar rectangular discrete metasurfaces 21 arranged periodically, that is, m=10.

[0043] Below in conjunction with simulation experiment, technical effect of the present invention is described further:

[0044] 1. Simulation conditions and content

[0045] Using the three-dimensional full-wave electromagnetic field simulation software CST STUDIO SUITE 2016 to simulate the radiation pattern comparison diagram, near-field electric field diagram comparison diagram, maximum gain variation trend diagram, S11 simulation diagram and fan beam optimization diagram of the present invention, the results are as follows Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 shown.

[0046] 2. Simulation result analysis

[0047] refer to Figure 4 , a comparison diagram of the radiation pattern of...

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Abstract

The invention provides a high-directivity columnar convex surface conformal reflector antenna based on meta-surfaces, and mainly solves the problem that a convex mirror conformal with a columnar convex surface carrier cannot calibrate wave beams. The antenna comprises a columnar convex surface carrier, a convex mirror, a feed source, a coaxial adapter and a supporting structure, the convex mirrorcomprises m*n periodically arranged plane rectangle discrete meta-surfaces, the meta-surfaces are embedded into the convex surface of the columnar convex surface carrier, plane rectangle discrete meta-surfaces comprise dielectric substrates, resonant ring meta-surfaces and radiant floors, I resonant rings with different specifications are periodically and linearly arranged to form the resonant ring meta-surfaces, the resonant rings provide phase compensation for incident waves, beam calibration of electromagnetic waves and synthesis of fan-shaped beams are achieved by the aid of convex mirrorswith arbitrary curvatures, and the feed source is fixed at a focal point of the convex mirror through the supporting structure and feeds through the coaxial adapter. According to the antenna, high-directivity fan-shaped beam radiation is achieved, and the antenna can be used for fields such as wireless communication, obstacle detection and traffic collision avoidance systems.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a reflector antenna, in particular to a highly directional columnar convex conformal reflector antenna based on a metasurface, which realizes fan-shaped beams and can be applied to wireless communication, obstacle detection and mid-air collision avoidance systems and other fields. technical background [0002] The high directivity of the reflector antenna makes it widely used in communication, radar and other aspects. However, traditional reflectors are generally designed as concave paraboloids, which are difficult to conformally load on the cylindrical convex surface of the spacecraft. For the traditional parabolic reflector, since the parabola has the property that the distance from any point on the parabola to the fixed focus is exactly equal to the perpendicular distance from the point to the fixed directrix, all waves emitted from the isotropic feed at the focus pass through...

Claims

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Application Information

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IPC IPC(8): H01Q15/00H01Q15/16H01Q19/10
Inventor 杨锐高东兴李冬张澳芳屈亚蓉李佳成
Owner XIDIAN UNIV
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