Some features of electromagnetic scattering by radially inhomogeneous DNG spheres

A modification of the hybrid projection method developed for analysis of electromagnetic wave scattering by radially inhomogeneous sphere is described. The method is validated for convergence, comparison with appropriate results available in the literature, and for fulfillment of the optical theorem. The method is applied for studying plane wave scattering by Luneburg and Eaton-Lippmann lenses with negative permittivity and permeability. Geometric-optic ray tracing and some results for bistatic and monostatic scattering cross-section for the indicated doubly negative (DNG) lenses of various radii are compared to those of their conventional dielectric analogs.