Metallic waveguide antenna with two-way identical-rotation equal gain circular polarized wave radiation characteristics

Abstract

The invention relates to a metallic waveguide antenna with two-way identical-rotation equal gain circular polarized wave radiation characteristics. The metallic waveguide antenna comprises a square opening surface metal waveguide, a dielectric sheet, a rectangular upper arm metal sheet, a rectangular lower arm metal sheet, a microstrip wire and a coaxial wire inner conductor feeding probe, wherein two ends of the metal waveguide are provided with openings, the dielectric sheet is arranged on one inner side wall of the metal waveguide, the upper arm metal sheet and the lower arm metal sheet are arranged on the dielectric sheet and have the same length and width, the microstrip wire is used for connecting the upper arm metal sheet and the lower metal sheet, and the coaxial wire inner conductor feeding probe is connected to the right center point of the microstrip wire. The metallic waveguide antenna has the advantages that the feeding is realized in the middle of the waveguide, the two-way radiation is adopted, circular polarized waves radiated in two opposite directions have the same rotation directions, i.e. the circular polarized waves radiated in the two opposite directions are all left-rotation circular polarized waves or right-rotation circular polarized waves, the metallic waveguide antenna can be manufactured by adopting ordinary metals, the cost is low, the minimum size of the metallic waveguide antenna is greater than the half wavelength of the work frequency, the maximum size is greater than one wavelength, the processing of the designed antenna is convenient, and the influence of the mechanical processing precision on the performance of the metallic waveguide antenna is less.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a metal waveguide antenna with bidirectional co-rotation and equal-gain circularly polarized wave radiation characteristics. Background technique [0002] Bi-directional radiation means that the antenna radiates with the same energy in two opposite directions. The traditional patch antenna has a unidirectional directional radiation characteristic due to the existence of the floor, and the monopole antenna has a horizontal omnidirectional radiation characteristic, and they alone cannot produce a bidirectional radiation pattern. However, in some wireless communication systems, such as bridge tunnel communication and mine roadway wireless system, the two-way radiation pattern is very important, because the channels of these systems have relatively slender pipeline characteristics. In addition, in systems such as radio frequency identification systems, microcell base stations, indo...

AI Technical Summary

Problems solved by technology

This will result in the inability to transmit signals in one of the radiation directions of the antenna because the circularly polarized waves rotate in opposite directions

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