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

Abstract

The invention relates to a resonant ring microwave vortex beam transmitter based on artificial surface plasmon polaritons, which includes a dielectric plate, a metal ring and a linear waveguide covering the upper surface of the dielectric plate, and a metal ring covering the lower surface of the dielectric substrate. The metal floor; the metal ring is composed of several artificial surface plasmon polariton unit structures A arranged periodically; the artificial surface plasmon unit structure A is a slotted unit structure with periodic changes in surface impedance; the linear waveguide consists of two The ground coaxial connector at the end, several artificial surface plasmon unit structures B in the middle, and a matching structure for connecting the ground coaxial connector and several artificial surface plasmon unit structures B; the artificial surface plasmon The unit cell structure B is a slotted unit with a constant slot depth. The present invention is capable of emitting vortex beams with precisely defined orbital angular momentum and having different orbital angular momentum modes at different frequencies, and can also emit circularly polarized vortexes.

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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