Solving the Scattering of Combined Conductor-Dielectric Bodies Based on EPA

This work introduces a new method for analyzing the scattering from combined conductor-dielectric bodies based on equivalent principle algorithm (EPA). The object is decomposed into several different parts. In each part, it can be an inhomogeneous dielectric or a perfect electric conductor (PEC) of arbitrary shape. Equivalent surfaces (ES) are built for the interactions between each parts. And the current translation from the object to ES can be accelerated by the transformed multilevel fast multipole algorithm (MLFMA). Numerical result demonstrates the efficiency and accuracy of the proposed method.