Electromagnetic wave diffraction by a doubly-periodic grating of uninterrupted curvilinear metal strips placed on both surfaces of a dielectric layer

The problem of electromagnetic wave scattering by a planar doubly-layer structure (DLS) consisting of doubly-periodic strip gratings placed on both surfaces of a dielectric layer are solved using a numerical method. The influence of the strip shift in neighboring layers on diffraction characteristics is analyzed. The frequency dependence of surface current values on the structure Strips is considered in the case of a small distance between layers.