A Novel Approach to the Design of Inhomogeneous Dielectric Lens Antennas based on Geometrical Optics

In this paper we present a novel approach to the design of inhomogeneous lenses which is obtained by inverting the standard method of Geometrical Optics for inhomogeneous media. As a result of this method, we obtain the refractive index spatial distribution that is capable to drive the rays along prescribed ray paths which are defined to transform the impinging field on the input surface into the target aperture distribution on the output surface of the lens. After the first part where the method is presented, two examples of a telescopic lens (a lens that magnifies an impinging planar wavefront) will be shown.