Application of the Improved PO Technique for Analysis of Scattering Problems

The major drawback of the physical optics (PO) approximation to the solution of scattering problems is that the edge effects can not be taken into account. Therefore, the PO-derived current should be usually corrected by including additional terms that account for diffraction phenomena. In this paper, the effect of the correction terms associated with diffraction on edges of a flat polygonal scatterer, and corresponding to the wedge diffraction is examined. Selected numerical examples demonstrate usefulness and limitations of the approach for analysis of the scattering problems.