Radiation pattern of circularly polarized dual beam antennas

Abstract

Using a hybrid analysis method consisting of the method of moments and geometrical theory of diffraction, calculations on a circularly polarized dual-beam antenna with a circular reflector are carried out, and the directivities conforming to the design objective are obtained. The directivity of a monopole antenna positioned on a finite planar reflecting plate is calculated. Assuming the direction and number of elements of the monopole antenna to be arbitrary values, the effects of diffractions due to the reflector's edges are considered on the basis of the geometrical theory of diffraction. The antenna considered here is intended for communication between a stationary satellite and mobile stations.