Scattering by a metallic wedge cylindrically capped with penetrable materials

A metallic wedge cylindrically coated by two coaxial penetrable materials is considered. The inner cylinder coating the edge is made of either a DPS material or a DNG metamaterial, and is in turn coated by a layer of DPS material. The primary field is a plane wave incident normally to the edge of the wedge. An exact analytical solution is obtained, and numerical results are presented and discussed.