Spectral Composition of the Scattered Field from a Large Metallic Cloaked Cylinder

An analysis of the spectral content of the scattered field by metallic cylinders covered by homogeneous mantle cloak is performed. In particular, a theoretical approach based on Mie Theory is considered for the computation of the scattered field, which is examined in terms of radar cross-section and scattering coefficients. The values of surface impedance that lead to the minimum of the radar cross section are determined as a function of the cylinder radius normalized with respect to the frequency of operation and of the dielectric material characteristics. Furthermore, the spectral composition of the scattered field for this optimal condition is evaluated and compared with that of the bare cylinder case.