Leakage wave microstrip annular orbit angular momentum antenna

Abstract

The invention provides a leakage wave microstrip annular orbit angular momentum antenna. The leakage wave microstrip annular orbit angular momentum antenna comprises a dielectric substrate, a microstrip line and a grounding surface, wherein the microstrip line and the grounding surface are respectively arranged on an upper surface and a lower surface of the dielectric substrate, the microstrip line comprises a plurality of annular microstrip lines which are concentrically arranged at intervals, openings are formed in the plurality of annular microstrip lines, an initial end and a terminal of each annular microstrip line are formed at each opening, the initial end is connected with a coaxial feeder, the coaxial feeder is used for connecting a feeding network, and the terminal is connected with a matching load. Openings are formed in the microstrip lines, opening ends of the microstrip lines are matched with the matching loads, so that the antenna generates an annular travelling wave toradiate OAM; and by arranging at least two concentric microstrip lines on the dielectric substrate, the antenna integrates at least two independent microstrip radiation units, integration of multipleOAM mode radiation units under the same working efficiency is achieved, and the antenna has practical value.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a leaky-wave microstrip loop orbital angular momentum antenna. Background technique [0002] In order to alleviate the contradiction between the increasingly scarce spectrum resources and the increasing demand for wireless services, academic circles have conducted extensive and in-depth research in various aspects. In recent years, Orbital Angular Momentum (OAM) has attracted widespread attention in the academic community due to its promising prospect of greatly expanding spectrum resources. The isophase surface of the electromagnetic wave carrying OAM will no longer be a traditional plane or sphere, but a vortex; different modes of OAM waves have different vortex shapes on the isophase surface. Multiple carriers of the same frequency, as long as their OAM modes are different, are mutually orthogonal and can provide multiple independent channels. [0003] When these independent channels...

AI Technical Summary

Problems solved by technology

[0004] The current mainstream OAM antennas can be divided into three categories: uniform circular arrays, spiral phase plates, and electromagnetic metasurfaces, but most of them are limited in practical applications due to difficulties in miniaturization and multi-mode multiplexing.

At the same time, although the above antennas can generate different modes of OAM at different frequencies, they cannot radiate multi-mode OAM at the same frequency.

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