A Vortex Electromagnetic Wave Antenna Based on Fabry-Perot Resonator

Abstract

The invention belongs to the field of vortex electromagnetic wave antennas, and specifically provides a vortex electromagnetic wave antenna based on a Fabry-Perot resonant cavity, which is used to solve the problems of low gain, short transmission distance, large diffusion angle, The external feeding network is complicated and so on. The present invention includes: a metal reflection surface 1, a partial reflection surface 2, a spiral phase plate 3 and a microstrip rectangular patch antenna 4, wherein the spiral phase plate is divided into equal parts according to the central angle with the center as the center of the circle. n The thickness of the dielectric blocks increases clockwise or counterclockwise; different dielectric thicknesses provide the respective wavefront phase delays for the plane electromagnetic waves with different azimuth angles, and the plane electromagnetic waves are converted into a mode number of +1 or ‑ 1 vortex electromagnetic wave; finally realize the design of a vortex electromagnetic wave antenna with high gain and low scattering angle without complex external feeding network, and has the advantages of simple structure, easy processing and low cost, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of vortex electromagnetic wave antennas, relates to a vortex wave generator, and specifically provides a vortex electromagnetic wave antenna based on a Fabry-Perot resonant cavity. Background technique [0002] Electromagnetic waves are the main carrier of information transmission in modern wireless communication networks, and the most commonly used are plane waves and spherical waves. need. Compared with the plane wave, the vortex electromagnetic wave has a spiral wavefront phase, and its isophase surface propagates in a vortex state, and the phase appears on the same section. 2πl periodic distribution, so the vortex electromagnetic wave has different phase distribution characteristics and phase order characteristics, so it carries an extra dimension. Theoretically, there are infinite modes of vortex electromagnetic waves, and each mode can propagate at the same frequency at the same time, and the modes are orthogo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vortex electromagnetic wave antenna based on a Fabry-Perot resonant cavity in view of the problems of the existing vortex electromagnetic waves with low gain, short transmission distance, large diffusion angle, and complex external feeding network. , to improve design flexibility, expand application range, and reduce application cost

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