Abstract
The radiation characteristics of waveguide antennas located on the surface of a circular cylinder are investigated theoretically and numerically. A reactive impedance structure is used to provide reduced coupling between two antennas on the surface of a cylinder. Using the moment method, a solution to the problem of the radiation of a single and two parallel-plate waveguides located on the surface of a reactive impedance cylinder is derived. The influence of the reactive impedance structure on the coefficient of standing waves, the radiation patterns, and the decoupling between antennas is studied.
Highlights
In radio engineering, a group of near-omnidirectional antenna radiators having a common flange, such as an open end of the waveguide, are widely used
The radiation characteristics of waveguide antennas located on the surface of a circular cylinder are investigated theoretically and numerically
We show that the presence of capacitive impedance almost completely eliminates distortions in their radiation patterns made by the receiving antenna
Summary
A group of near-omnidirectional antenna radiators having a common flange, such as an open end of the waveguide (or aperture), are widely used. We study the radiation pattern and the dependence of the coefficients of standing waves on the value of the constant reactive impedance of a single waveguide located on the surface of a circular cylinder. The presentation of radiation patterns for single and double antennas with and without impedance flanges for the cylindrical configuration with a corrugated decoupling structure is original to our work.
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