Dipole-Scattering by Spherical Media and Related Optimization Problems

摘要

A layered spherical medium is excited by an arbitrary internal or external dipole. Direct scattering problems are investigated analytically by employing a dyadic Green's function technique. Inverse scattering problems concerning the determination of the medium's parameters are subsequently considered in the low-frequency regime. Specific optimization problems are examined, referring to the determination of the medium's parameters so that the far-field exhibits desired variations. Certain initial numerical results on such problems are presented.