Electromagnetic scattering by three-dimensional arbitrary complex material/conducting bodies

An efficient numerical procedure for the analysis and computation of electromagnetic scattering by arbitrarily shaped three-dimensional complex material/conducting objects is presented based on integral equations, the equivalence principle, and the method of moments. The surface triangular basis functions are used to represent the equivalent electric current residing on the interface of material boundaries, and a new basis function defined on polygons enclosing the triangle vertices is developed to express and equivalent magnetic current which is approximately spatially orthogonal to the electric current. Four types of integral equations, electric (EFIE), magnetic (MFIE), and combined (CFIE) field integral equations, and the PMCHW formulation are used to compute the field scattered by a dielectric sphere. Numerical results compared with the Mie series solution illustrate the numerical characteristics of the new basis function and the flexibility and efficiency of the CFIE approach.<>