Electromagnetic scattering by the Luneberg lens reflector

A Luneberg lens with a metallic reflector is considered, for which the permittivity is a parabolic function of the radius. The electromagnetic scattering is considered and numerically evaluated by using the point matching method (PMM). The convergence of the total cross-section versus the number of sampling points has been examined. Near electric field distributions in space are presented and scattering patterns are also illustrated. It is found that the scattering pattern does not depend on the conical viewing angle for the reflector. A microwave experiment was also performed by six homogeneous layered media and also compared with theoretical values.