Time Domain Physical Optics Integral Evaluation on Third Order Triangular Patches

Abstract

A scheme to evaluate the physical optics (PO) integral on third order triangles in time domain is presented. Using the Radon transform interpretation of the radiation integrals, the PO integral on the surface modeled with third order triangles is reduced to a line integral and evaluated exactly using Gauss-Legendre quadrature rule (GLQR). A numerical example that demonstrates the accuracy and validity of the proposed scheme is presented.