Full wave analysis of large non-uniform metallic grid FSS under oblique incidence using Scale Changing Technique

The scattering analysis from metallic Grid FSS consisting of rectangular perforations on a metallic screen illuminated by an oblique incident plane wave is presented. The grid structure is analyzed using Scale Changing Technique (SCT) which is based on the partition of the grid-plane into planar sub-domains defined at various scale-levels. Electromagnetic interaction between subsequent scales is modeled by mutually independent Scale-changing networks and finally the complete structure can simply be represented by a cascade of these scale-changing networks. Theoretical and simulation results are compared.