ABSTRACT
In this chapter, further problems of electromagnetic wave propagation in spherical geometries are considered. It begins with the classical problem of plane-wave diffraction by a conducting and dielectric sphere. Then, the fields due to a vertical electric dipole above a conducting sphere are determined, followed by the fields above a spherical surface described by a surface boundary condition. The fields are asymptotically evaluated. The problems of a vertical electric dipole and of a vertical magnetic dipole in a spherical waveguide are solved in terms of zonal harmonics, with emphasis on the Earth-Ionosphere waveguide. This is followed by the modal solution of the problem.
