A metamaterial structure with high tunability

The design of a metamaterial with an electronically tunable negative refractive index region is presented. The proposed structure is loaded with commercial varactors operating over the C band. Tunability is achieved by applying a static electric field across the series connected unit cells. A theoretical description of the metamaterial unit cell is correlated with computer simulations. Experimental measurement of the completed structure in a WR137 waveguide will be presented at Metamaterials 2010