Exact Radiation From Dipole Antennas on Oblate Spheroids Coated With Isorefractive and Anti-Isorefractive Layers

A metallic oblate spheroid is coated with a confocal layer of penetrable material that is either isorefractive or anti-isorefractive to the surrounding space. An exact solution is obtained in terms of infinite series of oblate spheroidal wave functions when the primary source is an electric or magnetic dipole located on the symmetry axis of the structure and axially oriented. Numerical results are presented and discussed.