DIFFRACTION AND SCATTERING OF ELECTROMAGNETIC-WAVES BY SPHERES WITH ELLIPTIC SLIT APERTURES AND INTERIOR LOADING

An analytical method is presented for solving the problem of diffracti on of electromagnetic waves by a perfectly conducting sphere with an e lliptic slit aperture. The interior of the sphere is filled with two d ifferent media which are radially stratified. The treatment of this ca nonical shielding problem may provide a better insight into the coupli ng mechanism of electromagnetic waves through slit apertures in realis tic shielding structures. The solution of this three-dimensional diffr action problem is based on the spherical multipole expansion of the el ectromagnetic field.