Exact Solution for a Dipole Above Two-Layered Semi-Oblate Spheroidal Cavity

Exact solution for an electromagnetic scattering problem is provided for the following geometry: semi-oblate spheroidal cavity filled with layered anti-isorefractive double positive (DPS) and double negative (DNG) materials with a circular aperture is surrounded by PEC walls. The source is an axially oriented dipole located on the axis of symmetry in the upper half-space of DNG material. An exact analytical solution for the fields inside the cavity and the exterior region is derived.