An efficient numerical approach to the accurate analysis of propagation and radiation phenomena in metamaterial structures

An overview is presented of a novel implementation for the efficient analysis of metamaterial structures embedded in layered media. Based on a suitable mixed-potential integral-equation formulation, ad hoc acceleration procedures for the periodic potentials (expressed through slowly-convergent series when source and observation points lie in the same horizontal plane) have been developed. The approach consists of an asymptotic extraction of homogeneous-medium terms. Numerical results are shown, which prove the computational efficiency of this method and validate different types of propagation and radiation features occurring in metamaterial-like structures. The method is validated with commercial software and data from the literature.