Application of characteristic modes for the analysis of scattering from dielectric coated conducting bodies

As we all know, the merits of characteristic mode (CM) theory in antenna designs and optimizations have been well recognized in our EM community. In this paper, the scattering analysis for dielectric coated conducting bodies will be reconsidered using the modal expansion method from a novel CM formulation we developed very recently. Thus the contribution of each mode to the total scattering response can be readily obtained. It offers deep physical insight into the scattering mechanism and valuable information on how to control and adjust scattering pattern. Numerical results are presented to demonstrate the accuracy of the proposed modal expansion method in scattering analysis.