Advances in mantle cloaking design

In this work we report some advances in the design of mantle cloaking devices to reduce the scattering of an object at microwave frequencies. We first show how to design a cloaking device able to reduce the scattering of canonical 1D, 2D or 3D objects overcoming the restrictions affecting the current covers working for a single-polarization only. Theoretical considerations as well as full-wave simulations confirming the effectiveness of the proposed cloaks are provided. Moreover, we present a generalization of the mantle cloaking theoretical formulation in order to take into account multilayer cloaking devices. This analysis allows to extend the validity of the mantle cloaking approach beyond the quasi-static condition, which is commonly considered as the main limitation of scattering cancellation-based cloaks.