Analysis and design of an invisibility cloak based on transformation optics at microwave frequencies

Abstract

Invisibility cloaks can be constructed with electromagnetic metamaterials. In this paper, structural meta- materials are used to design an invisibility cloak. To this end, transformation optics is used to design electromagnetic parameters. These parameters are selected so that when we excite the cloak its presence does not perturb radiated elds. Therefore, we formulate the electric eld both at the inner and outer parts of the cloak, when the excitation source is placed both inside and outside, and we show that the scattered elds will be suppressed due to its presence. Finally, simulation results verify that the invisibility cloak is well designed and is able to hide the cylindrical metal inside it.