Beam reshaping by a slab of anisotropic metamaterial supporting magnetoinductive waves

In this paper, we investigate both theoretically and experimentally, the situation that exists when magnetoinductive waves are efficiently generated in uniaxial composite metamaterial structures composed of SRRs. We excite a slab of a magnetic metamaterial using a monopole antenna and analyze the beam structure behind the slab. Although the scale of the composite constituents are much smaller then the wavelength of radiation, we observe that an approximation based on an effective medium fails to describe all observed effects, including the multiple beam splitting. We develop a numerical algorithm for describing the lattices of SRRs in terms of interacting dipoles, and confirm qualitatively the effects observed in experiments.