Electromagnetic scattering from two external spheres one of which has small radius

摘要

The scattering of a plane electromagnetic wave from a dielectric or metallic sphere external to another one, also dielectric or metallic, of electrically small radius, is examined. The method of separation of variables is used, in conjunction with translational addition theorems for spherical vector wave functions. Analytical expressions are obtained for the scattered field and the various scattering cross-sections. Numerical results are given for dielectric and metallic spheres and for various values of the parameters.