Scattering by PEMC (Perfect Electromagnetic Conductor) Spheres using Surface Integral Equation Approach

摘要

This article discusses bistatic scattering by totally reflecting spheres. The spheres are either perfect electric, magnetic, or electromagnetic conductors (PEMC). The PEMC medium is described by the parameter M with special cases of PMC (vanishing M) and PEC (infinite M). The scattering by a small sphere of such a material from incoming plane wave can be explained by the interplay of electric and magnetic dipoles. The special characteristics of the radiation of PEMC spherers (different from PEC and PMC) include cross-polarization which is especially marked in the backscattering direction. The radiation pattern is rotated by an angle that has a simple connection with the M parameter. Scattering patterns of PEMC spheres with size parameters up to ka = 3 are shown and they also display cross-polarized properties. The computations are based on a MoM software to solve the surface integral equation for the fields.