Solution of three dimensional electromagnetic scattering problems using method of moments and rwg basis functions

In this study, electromagnetic scattering problems of some three dimensional scatterers are solved using method of moments(MoM). Computing of surface currents that induced when an electromagnetic wave impinges upon a 3 dimensional perfectly conducting scatterer which formulated with integral equations are studied by using MoM and Rao-Wilton-Glisson (RWG) basis functions. Thus, integral equations that don't have analytical solution converted to matrix equations. Then, surface currents on the scatterers obtained by solving these matrix equations. MoM was used efficiently to solve electromagnetic scattering problem of the scatterers that have different geometric shapes. In order to obtain the surface currents, surface of the scatterers segmented using triangular mesh refinement, RWG functions are used as basis and test functions. Matlab was used for discretization of surface of the scatterers and to calculate the surface currents of the scatterers. Impedance matrices that obtained by solving integral equations using MoM are always dense matrices. Since processing time and memory usage becomes prohibitively large, both fill-in and solving of these impedance matrices becomes impossible while electrical size of the scatterers are increased. In this study, determination of processing time and memory usage are provided, as increasing size of the scatterers up to 6λ.