A beam-shifting slab implemented using printed, tensor TL metamaterials

This paper presents the implementation of a beam-shifting slab (a transformation optics device) using tensor transmission-line (TL) metamaterials. The slab consists of printed unit cells exhibiting anisotropic effective material parameters, while the surrounding medium consists of printed isotropic unit cells. The measured electric field patterns within the beam-shifting slab and the surrounding media show close agreement with simulation. The results experimentally verify the anisotropic properties of tensor TL metamaterials and open new opportunities to design transformation optics devices at microwave frequencies.