Mantle cloaks for elliptical cylinders excited by an electric line source

We investigate the ability of surface impedance mantle cloaks for cloaking of elliptical cylinders excited by an electric line source. The exact analytical solution of the problem utilizing Mathieu functions is obtained and is used to derive optimal surface impedances to cloak a number of configurations. Specifically, theoretical designs are presented which can minimize the scattering from line source excited dielectric elliptical cylinders, as well as conducting strips immersed in such structures. It will be shown that the required surface impedances are angle-dependent; that their performance has limitations with respect to the source and observation point locations.