Power Series/MOM Solution to EM Scattering by Electrically Large PEC Objects

In this work, we present a new method of moments solution procedure to obtain induced currents on a large conducting body due to a plane wave incidence. The procedure involves dividing the total number of basis functions into a small number of groups thereby casting the moment matrix into a collection of submatrices representing self and mutual interaction between the groups. Next, the procedure involves eliminating the interaction of two immediate neighbors on any selected group. This process results in a strong block diagonal moment matrix plus zeros in the blocks residing on either side of the diagonal block. The new matrix can be inverted using power series approach and accurate solution can be efficiently obtained. The present approach is simple, efficient, and retains all the advantages of conventional method of moments scheme.