Transformation optics and its application to the design of broadband antennas: Experimental demonstration

In this presentation, we will demonstrate that the use of discrete transformation optics can provide all dielectric antennas such as those published in (R. Yang, W. Tang, and Y. Hao, Opt. Express, 19, 12348-12355, 2011). Therefore, in this implementation of transformation optics, the use of metamaterials is not necessary, and thus, the redesigned antenna exhibits the same operational bandwidth as the original one. We also studied the robustness of this technique with respect to the employed discretisation (for the convenience of practical implementations). To this aim, as a particular example, a flat antenna which is derived from a hyperbolic lens has been chosen. Two practical discretisations have been studied and compared. Simulations and measurements have been undertaken, and both results will be presented in the conference with good agreement between them.