GTD, PO, PTD, AND GAUSSIAN BEAM DIFFRACTION ANALYSIS TECHNIQUES APPLIED TO REFLECTOR ANTENNAS

Abstract

Several available diffraction analyses techniques are compared in this paper. Techniques including GTD, PO, PTD, and Gaussian Beams, are used to analyze representative reflector antenna geometries. First the techniques are compared for a flat circular disc, representing an unfocused system. Next, the techniques are applied to offset ellipsoidal reflectors and the offset parabolic reflectors. Near-fields, focal- fields and far-fields are determined using these techniques. Both copolar and cross-polar fields are compared. The acceptability ranges of each technique is carefully investigated. Numerical data are presented for representative configurations and, in particular, field intensities are determined for high power microwave applications. [Vol. 6, No. 1, pp. 6-30 (1991), Special Issue on Applications of High Frequency Methods and Computer Techniques in Electromagnetlcs]