Back-scattered cross section from a sparse distribution of tilted thin dielectric disks

Abstract

The back-scattered cross section from a sparse distribution of tilted thin circular dielectric disks have been investigated using numerical simulations. Three widely known scattering approximations from a dielectric disk such as Rayleigh–Gans, Koh–Sarabandi and volumetric integral physical optics have been used for the proposed theory. The influences of the various parameters including incident angle, size parameter of the disk, relative permittivity of the disk and spacing among disks upon the back-scattered cross sections have been studied for incident horizontal and vertical polarizations. Some conditions are discussed where a pair of sparsely located tilted low loss Gallium Arsenide disks can be used to significantly reduce the back-scattered cross section as a compared to a single tilted Gallium Arsenide disk. This type of reduced back scattering for both types of incoming horizontally and vertically polarized waves is desired in the stealth technology.