Combined use of PO-MoM and Local-MoM for reducing MoM areas for wide angular observation points

Abstract

PO-MoM is a hybrid method where Physical Optics Current Approximation is corrected by addition of the Fringe wave component (FW) obtained by Method of Moment (MoM). Authors have succeeded to define/localize the areas for the MoM on the scatterer by introducing the Fresnel zone number. Unfortunately, this area extends most of the scatterer surface for some specific combinations of the source and the observer and reduction of computational load fails. This paper introduces another high frequency concept of locality of diffraction, Local-MoM, proposed by the authors, for compensating this defect. Combined use of PO-MoM and Local-MoM realizes almost frequency independent number of unknowns.