Method of moments formulation for an arbitrary material configuration

A method-of-moments surface formulation for an arbitrary material configuration is presented. The material effects are included via an exact formulation rather than by using approximate boundary conditions such as the surface impedance model. Furthermore, complicated material composition such as a multilayer coating can be accommodated. The equivalence principle is applied to the multiple conductor/dielectric body configuration in order to obtain an equivalent scattering problem for each homogeneous medium existing in the model. Superposition of all equivalent problems results in the solution of the original problem. To solve for the equivalent currents on the bodies involved in the problem, the method of moments is applied to the PMCHW (Poggio, Miller, Chang, Harrington, and Wu) formulation.<>