Resonant ring microwave vortex beam emitter based on artificial surface plasmon polaritons

Abstract

The invention relates to a resonant ring microwave vortex beam emitter based on artificial surface plasmon polaritons. The resonant ring microwave vortex beam emitter comprises a dielectric plate, a metal circular ring, a linear waveguide and a metal floor, wherein the metal circular ring and the linear waveguide cover an upper surface of the dielectric plate, the metal floor covers a lower surface of the dielectric plate, the metal circular ring is composed of a plurality of artificial surface plasmon polariton unit structures A which are periodically arranged; the artificial surface plasmonunit structures A are slotting unit structures with periodically changed surface impedance; the linear waveguide comprises grounding coaxial connectors at two ends, a plurality of artificial surface plasmon unit structures B located in the middle and a matching structure used for connecting the grounding coaxial connectors and the artificial surface plasmon unit structures B; and the artificial surface plasmon unit structure B is a slotting unit with invariable slot depth. Vortex beams carrying precisely defined orbital angular momentum can be emitted, different orbital angular momentum modesare achieved under different frequencies, and circularly polarized vortexes can be emitted.

Description

technical field [0001] The invention belongs to the field of artificial electromagnetic materials and relates to a resonant ring microwave vortex beam transmitter based on artificial surface plasmon polaritons. Background technique [0002] In recent years, wireless communication technology has developed rapidly, but the scarcity of spectrum has become a bottleneck restricting its development. Currently widely used technologies to solve spectrum problems include orthogonal frequency division multiplexing, code division multiple access, and space-time coding techniques. Orbital angular momentum is a new degree of freedom, and its modes are orthogonal to each other. It is this characteristic that makes it the basis for improving communication speed and coding efficiency, and can greatly improve spectrum utilization. The electromagnetic beam carrying the orbital angular momentum refers to the electromagnetic beam that advances spirally, also known as the vortex electromagnetic...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the existing orbital angular momentum implementation method is too complicated, the generated vortex beam is single, that is, the antenna multiplexing cannot be realized, and the devices are not easy to integrate, and to provide an artificially-based Surface Plasmon Ring Resonators for Vortex Beam Emitters

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