Geometrical theory of diffraction including corner diffractions with application to radiation pattern analysis of major angle corner reflector antenna

Abstract

AbstractThe major angle corner reflector antenna is characterized by a large half‐power value width in the magnetic plane and a large front‐to‐back ratio. This antenna is considered a candidate for the fixed‐state antenna for radio communication within a limited space being studied by the authors. The analysis of radiation patterns of antennas of this type traditionally has been carried out by the induced electromotive force (EMF) method. In such calculations, the errors in the sidelobes have been substantial.In the analysis of the radiation pattern in this paper, the corner diffraction formula derived previously and the approximate corner diffraction formula for a hollow wedge corner which is newly derived by an asymptotic calculation from the equivalent edge electric and magnetic currents in the UTD are included in the application of the GTD (Geometric Theory of Diffraction). It is shown that by this approach an accurate analysis can be performed in both the E‐ and H‐planes. It is confirmed that the results by the GTD, by the MM (moment method), and by the experiments agree well.