Construction of Arbitrarily Shaped Cloaks using Characteristic Mode Method

The paper proposed a robust method to design the invisibility cloaks for arbitrarily shaped object based on the characteristic mode method (CMM). According to discrete dipole approximation (DDA), target with arbitrary geometry can be modelled by a couple of interacting dipoles. By exploiting the characteristic mode analysis, laws of objects with low or nearly identical scattering efficiency are theoretically shown related to the generalized eigenvalue of interacting matrix in DDA method. Hence the relation can be utilized to manipulate the invisibility and illusion images. The accuracy and effectiveness of the developed approach have been demonstrated by numerical arbitrary cloaks in full-wave simulation.