Extraction of metamaterial parameters

In this paper, we present to retrieve the effective electromagnetic parameters of a metamaterial. In this retrieval method, calculated or measured scattering parameters are employed for plane wave incident obliquely on a metamaterial slab at different angles. We not only can extract the electric permittivity ε and the magnetic permeability μ from calculation of the scattering S-parameters, but also can retrieval the components of electromagnetic parameters, then we can get any material parameter distribution of the material.