Metasurface-based plane cassegrain vortex field antenna

A metasurface and vortex field technology, applied in antennas, electrical components, circuits, etc., can solve the problems of inability to precisely control the phase, low radiation efficiency of the antenna, and large phase change gradient, and achieve high-efficiency excitation, simple structure, and cost. low effect

Active Publication Date: 2018-11-16
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

However, the existing antennas based on single-mirror reflectors have low radiation efficiency, low gain, complex feed source configuration, and excessive phase change gradients that make it impossible to precisely control the phase. Gain vortex electromagnetic wave

Method used

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  • Metasurface-based plane cassegrain vortex field antenna
  • Metasurface-based plane cassegrain vortex field antenna
  • Metasurface-based plane cassegrain vortex field antenna

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0026] Reference figure 1 , The present invention includes a main reflector 1, a secondary reflector 2, a feed source 3, and a supporting structure 4. The main reflector 1 adopts a plane square structure, the center of the main reflector 1 is hollowed out, and the feed 3 is installed in the empty position. The feed 3 adopts a pyramid horn antenna. The pyramid horn antenna is divided into a waveguide part and an opening angle part. The waveguide part It is a standard WR51 waveguide. The value of the hollow area is determined by quantification, that is, the Cartesian coordinate system is established with the center of the upper surface of the main mirror 1 as the origin of the coordinates, the x-axis is parallel to one side of the main mirror 1, the y-axis is parallel to the adjacent side, and the x-axis It is perpendicular to the y-axis, and the z-axis is perp...

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Abstract

The invention discloses a metasurface-based plane cassegrain vortex field antenna, and mainly solves the problem that an existing vortex field antenna is high in phase compensation error, low in radiation gain and complex in structure. The metasurface-based plane cassegrain vortex field antenna comprises a main reflecting mirror (1), an auxiliary reflecting mirror (2), a feed source (3) and a supporting structure (4); the main and auxiliary reflecting mirrors and the feed source adopt a positive forward mode; the virtual focal point of the auxiliary reflecting mirror coincides with the focal point of the main reflecting mirror, and the solid focal point coincides with the phase center of the feed source; the auxiliary reflecting mirror adopts a phase change metasurface structure; the mainreflecting mirror adopts a plane structure; and the main reflecting mirror comprises a main dielectric layer (11), a main reflecting layer (12) and main phase regulating and controlling layers (13), wherein the main phase regulating and controlling layers are uniformly arranged, formed by a main metal ring microstructure (131) integrally distributed in a spiral shape and are used for generating vortex electromagnetic waves. By virtue of the metasurface-based plane cassegrain vortex field antenna, the vortex electromagnetic wave is efficiently excited, the antenna phase compensation error is reduced, the gain is increased, the structure is simplified, and the antenna can be used for communication and radar.

Description

Technical field [0001] The invention belongs to the technical field of antennas, and relates to a planar Cassegrain vortex field antenna, which can be used for communication and radar. technical background [0002] In recent years, the demand for communication capacity has increased sharply. Because of its good orthogonality in different modes, vortex electromagnetic wave communication can form a large number of same-frequency multiplexing channels, which greatly improves the spectrum utilization and communication capacity, so it has become the focus of research. . In vortex electromagnetic wave communication, how to efficiently excite vortex electromagnetic waves is a key link. The vortex field antenna with good directivity and high-quality spiral phase distribution can realize the long-distance transmission, identification and multiplexing of vortex electromagnetic waves. Microwave reflector antennas have large gains and are suitable for constructing vortex field antennas. Usu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q19/185H01Q15/14H01Q13/02
CPCH01Q13/02H01Q15/14H01Q19/185
Inventor 杨锐高鸣高东兴李冬张澳芳李佳成
Owner XIDIAN UNIV
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