Backscattering from Isosceles Triangular Metallic Plates

Abstract

The Geometrical Theory of Diffraction is used to describe backscattering from a triangular plate illuminated with vertical polarization. RCS predictions based upon single diffraction are compared with numerical results from the Method of Moments for conducting plates between 2 and 14 wavelengths in dimension. Results are presented for plates having form factor (ratio of height-to-width) of two or greater. The asymptotic theory provides an excellent match at all aspects except approaching grazing incidence on the rear, where multiple diffraction plays an important role.