Research on monostatic and bistatic RCS of cloaking based on coordinate transformation

Metamaterials with carefully chosen negative permittivity and permeability can guide electromagnetic wave to bypass a target without any scattering theoretically. This paper uses the basic theory of coordinate transformation to generate such permittivity and permeability which can result in such a perfectly cloak effect. The invisibility of the cloak is demonstrated by a cylinder and a sphere wrapped with metamaterial. COMSOL Multiphysics software is utilized to simulate the interaction between incident electromagnetic wave and the cloaks. Monostatic and bistatic radar cross section (RCS) is calculated to show the scattering suppression effect. The results show that metamaterials have an excellent performance in reduction of the scattering. Backscattering RCS can be reduced about 20 dB relative to the non-cloak target.