Nested Equivalent Source Approximation for the Modeling of Penetrable Bodies

A multiregion nested equivalent source approximation (NESA) is presented for the fast analysis of electromagnetic scattering by piecewise homogeneous media. NESA was introduced for the analysis of metallic problems at low and moderate frequencies, and later extended to the fully dynamic case with the introduction of a directional scheme. In this communication, we modify the wideband scheme for the...