Analysis of metamaterial cloaking by using a cubical cloak

This paper reports a cubical cloak formed of double layered metamaterial unit cells. Four sidewalls surround a metallic cylinder for cloaking action at 7.7 GHz. Twelve unit cells constitute each sidewall of the cloak. The proposed metamaterial exhibits negative permeability near the cloaking frequency. Scattering of incident electromagnetic waves is mitigated due to cloaking mechanism. The metamaterial exhibits low return loss and high transmission at the cloaking frequency which makes the incident electromagnetic waves to graze through the metamaterial in the forward direction without any scattering loss. Radar cross-section (RCS) reduction of the metallic cylinder takes place when it is cloaked, which validates the cause for invisibility of the object. Cloaking is demonstrated through numerical simulations using finite integration technique.