Dielectric-loaded quadrifilar helix antenna with omnidirectional, circular polarization, and high gain performances

Abstract

The invention discloses a dielectric-loaded quadrifilar helix antenna with omnidirectional, circular polarization, and high gain performances. The antenna comprises a feed network and a radiation main body. According to the invention, a radio frequency signal of the feed network is transmitted to a first metal column 3 through an internal conductor 1 of a radio frequency coaxial cable and is transmitted to a second metal column 4, a third metal column 5 through an outer conductor 2; the first metal column 3 feeds power respectively to a first metal helix 9 and a second metal helix 10 on an outer surface of a dielectric cylinder 17 through a first metal tape 6, and the second metal column 4 feeds power to a third metal helix 11 on the outer surface of the dielectric cylinder 17 through a second metal tape 7; and the third metal column 5 feeds power to a fourth metal helix 12 on the outer surface of the dielectric cylinder 17 through a third metal tape 8, the line width of the first to the fourth metal helix 9-12 is gradually thicker from the end part to the tail part. According to the invention, a simple and compact structure is employed, and technical indexes of an antenna are ingeniously realized, wherein the indexes includes omnidirection, circular polarization, and high gain. Besides, the dielectric-loaded quadrifilar helix antenna has advantages of compact structure, small in size, light in weight, low cost, high efficiency, and good adaptability to environment; moreover, the antenna is easy to process and easy to tune.

Description

technical field [0001] The invention relates to the technical field of dielectric-loaded helical antennas, in particular to an omnidirectional circularly polarized high-gain dielectric-loaded four-arm helical antenna. Background technique [0002] Omnidirectional circularly polarized antennas have circularly polarized characteristics in all directions, and have very broad application prospects in communications, radar, electronic countermeasures, telemetry, remote sensing, astronomy, and television broadcasting. In order to achieve a certain coverage, the antenna is required to have a higher gain. Therefore, it is of great practical significance to develop an omnidirectional circularly polarized high-gain antenna. [0003] At present, there are generally two schemes for realizing omnidirectional circularly polarized antennas: multi-antenna and single-antenna. [0004] The multi-antenna scheme generally uses multiple antennas, that is, each antenna covers a certain directio...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of general omnidirectional circularly polarized antennas, such as complex structure, high processing precision and difficult adjustment, the present invention provides an omnidirectional circularly polarized high-gain four-arm helical antenna directly fed by a radio frequency coaxial cable, which can realize omnidirectional Directional, circular polarization, high-gain antenna technical indicators

Images