Scattering from an Open Spherical Shell Having a Circular Aperture and Enclosing a Concentric Dielectric Sphere

摘要

The generalized dual series solution to the scattering of an arbitrary plane wave from an open spherical shell having a circular aperture and enclosing a concentric, homogeneous dielectric sphere is presented. This solution explicitly exhibits the correct edge behavior, and it can handle spheres that are electrically small or large without special considerations. A variety of cross-section results are presented for the normally incident case. It is shown that effects corresponding to the presence of the interior cavity dominate all of the scattering data. In particular, the cross-sections exhibit new resonance features that are due to the cavity-backed nature of the aperture and depend on the characteristics of the interior sphere. The results demonstrate that interior information is contained in the exterior scattering data. (ERA citation 12:026237)