Low-profile omni-directional left-right-handed circularly polarized reconfigurable antenna

Abstract

The invention discloses a low-profile omni-directional left-right-handed circularly polarized reconfigurable antenna which comprises a dielectric substrate, a circular radiation patch, N double-arc-arm radiation patches and 2N radio-frequency switch diodes, N+1 patch inductors, N bonding pads, a circular grounding plate, N short circuit columns, a coaxial feed probe and a direct-current power supply, wherein a circular seam is formed in the circular grounding plate and is divided into an inner patch and an outer patch; the upper surface circular radiation patch is connected with the N double-arc-shaped arm radiation patches through the 2N radio frequency switch diodes which are biased in opposite directions; one end of the direct-current power supply is connected with the N bonding pads onthe upper surface of the dielectric substrate, and the other end of the direct-current power supply is connected with the inner patch; and three short-circuit columns are arranged at equal intervalson the equiangular line of the double-arc-shaped arm patch and connected with the circular radiation patch, the medium substrate and the circular grounding plate. The reconfigurable antenna in the invention has the advantages of good omni-directional circularly polarized radiation performance, capability of realizing omni-directional left-right-handed circular polarization switching, low loss, lowprofile, easiness to machine and low cost.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a low profile omnidirectional left and right circularly polarized reconfigurable antenna. Background technique [0002] Omnidirectional circularly polarized antennas can receive radio signals in any moving state on high-speed moving objects (such as spacecraft, airplanes, and cars); in broadcasting and television systems, they can effectively expand signal coverage , and to some extent overcome ghosting accents. Circularly polarized wave is a constant amplitude rotating field, which can be decomposed into two linearly polarized waves with equal amplitude and 90° phase difference. Circularly polarized signals can be received by various linearly polarized antennas, and circularly polarized antennas can receive any linearly polarized waves, while left (right) circularly polarized antennas cannot receive right (left) circularly polarized waves. Therefore, it is of great theoreti...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a low-profile omnidirectional left-handed circularly polarized Reconfigurable antenna with good omnidirectional circular polarization radiation performance, low profile, and easy left-right rotation mode switching

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