DETERMINING THE EFFECTIVE ELECTROMAGNETIC PARAMETERS OF BIANISOTROPIC METAMATERIALS WITH PERIODIC STRUCTURES

Abstract

A straightforward approach is proposed to retrieve the efiective electromagnetic parameters of a slab of bianisotropic material from the scattering parameters. We flrst obtain the values of the impedance and refractive index of a slab of metamaterial, followed by the deduction of the expressions for determining these electromagnetic parameters including permittivity, permeability and magnetoelectric coupling coe-cient. Then, comparisons between the results coming respectively from retrieval technique and analytical method are made. Finally, we demonstrate the properties of split-ring resonator materials in other two orientations with respect to the incident plane wave and apply the proposed method to anisotropic materials to reveal its generality.