A Multi-beam Antenna Based on Metasurface

A multi-beam antenna and metasurface technology, which is applied in the directions of antenna, antenna coupling, antenna grounding device, etc., can solve the problems of multi-beam antenna complex beamforming network and so on

Active Publication Date: 2021-05-14
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the existing multi-beam antenna needs complex beamforming network

Method used

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  • A Multi-beam Antenna Based on Metasurface
  • A Multi-beam Antenna Based on Metasurface
  • A Multi-beam Antenna Based on Metasurface

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Embodiment

[0024] Such as figure 1 As shown, a metasurface-based multi-beam antenna includes an upper dielectric substrate 1, a metasurface layer 2, an intermediate dielectric substrate 3, a feed network layer 4, and a lower dielectric substrate 5 that are arranged coaxially from top to bottom. and a ground plate 6, an air layer is provided between the intermediate layer dielectric substrate 3 and the feed network layer 4, the metasurface layer 2 includes 4 metasurfaces 201, and each of the metasurfaces 201 consists of 4× 4 square metal patch arrays, the feed network layer 4 includes 4 feed units, and each feed unit includes sequentially cascaded microstrip feeders 401, power splitters 402, impedance matching microstrip line 403 and two No. 1 rectangular metal patches 404, and the four feed units are rotated 90 degrees around the axis in turn, and the ground plate 6 includes four No. 2 rectangular metal patches 601 and cross-shaped microstrip lines 602 , the four No. 2 rectangular metal...

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Abstract

The invention belongs to the technical field of wireless communication, and in particular relates to a metasurface-based multi-beam antenna. The purpose of the present invention is to solve the technical problem that the existing multi-beam antenna requires a complicated beamforming network. A multi-beam antenna based on a metasurface, including an upper dielectric substrate, a metasurface layer, an intermediate dielectric substrate, a feed network layer, a lower dielectric substrate and a grounding plate arranged coaxially from top to bottom, in the middle There is an air layer between the layer dielectric substrate and the feed network layer. By setting the upper dielectric substrate, the beam width and gain of the antenna are improved. By adding a metasurface layer above the intermediate dielectric substrate, and setting the feed network below the intermediate dielectric substrate The layer improves the electromagnetic field distribution above the feed network layer, so that the beam is tilted in the elevation angle plane. The antenna does not need to design a complex beamforming network. Multi-beams are realized by using metasurfaces and dielectric substrates. The structure is simple, and the beams can be in azimuth face changes.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a metasurface-based multi-beam antenna. Background technique [0002] Multibeam antennas have promising applications in various fields such as satellite communications, radar systems, and wireless local area networks. At present, multi-beam antennas are usually implemented using a beamforming network to feed the antenna, such as a 4×4 Butler matrix, which consists of four 90° couplers, two cross couplers and two 45° phase shifters, which have four input and output ports, by stimulating one port at a time, a response with equal amplitude but different phases can be formed at the output port, thus forming four beams with different directions; (G.Tian, ​​J.-P.Yang, and W.Wu , "Butler Matrix Based Multi-Beam BaseStation Antenna Array," IEEE Trans.Antennas Propag., 67(2019), 5372–5379); Rotman lens-fed multi-beam antennas are designed using quasi-optical me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/48H01Q1/50H01Q1/52H01Q15/00
CPCH01Q1/48H01Q1/50H01Q1/52H01Q15/0086
Inventor 张文梅张佳楠苏晋荣陈新伟杨荣草
Owner SHANXI UNIV
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