A numerical approach on the verification of parameter retrieval techniques for composite periodic electromagnetic media

A new technique is proposed for the confirmation of the accuracy of effective parameter retrieval techniques for composite periodic electromagnetic media. The retrieved effective parameters are inserted into the analytical relations of wave propagation in a complex homogeneous medium and a reconstructed dispersion diagram is formed. This diagram is then compared to the original dispersion diagram returned by the eigenvalue analysis of the composite inhomogeneous structure and the discrepancies between them are determined.