High frequency ray technique analysis of electromagnetic scattering from triangular plate

At high frequencies, plane wave incident field backscattered by a perfectly conducting triangular plate is approximated to first order as the sum of the contributions from each individual corner and the opposite edge. An available heuristic corner diffraction coefficient is used to compute the corner diffracted fields. Second order corner incident edge scattered fields are next computed using uniform geometrical theory of diffraction (UTD). The sum of these contributions is used to obtain the radar cross section (RCS) of the plate. The computed RCS are compared with available measurements and earlier predictions for Sikta´s triangle.