A HYBRID SBR MOM TECHNIQUE FOR ANALYSIS OF SCATTERING FROM SMALL PROTRUSIONS ON A LARGE CONDUCTING BODY/

A hybrid technique combining the shooting-and-bouncing-ray (SBR) metho d and the method-of-moments (MoM) is presented for analyzing scatterin g by large conducting bodies having small protrusions. In this techniq ue, the MoM with an approximate Green's function is used to characteri ze the small protrusions, yielding an admittance matrix, which, when m ultiplied with the incident held on the protrusions, yields the curren ts induced on the protrusions, The incident field in the presence of t he large bodies is calculated using the SBR method. The held radiated by the currents on the protrusions is also calculated using the SBR me thod with the aid of reciprocity, Furthermore, an iterative approach i s developed, which can reduce the error introduced by the use of the a pproximate Green's function, Numerical results are given to demonstrat e the accuracy and capability of the hybrid technique.