High-order method of moment solution for penetrable scatterers

An efficient high-order method of moment (HO-MoM) technique, which has been introduced for the scattering of metallic structures, is extended to the solution of electromagnetic scattering by penetrable bodies. It is demonstrated that the HO-MoM solution leads to an exponentially convergent algorithm for scattering by penetrable bodies via the combined surface field integral equation. Both the current and the RCS realize exponential convergence. The proposed method is also computationally efficient in that it only requires a single integration for the computation of near interactions, and far interactions can be computed using a single point kernel evaluation. In general, it has been found that high-order quadrature order on large patches leads to the most computationally efficient solutions, in terms of memory and CPU time versus accuracy.