WAVE DIFFRACTION BY DOUBLE-PERIODIC GRATINGS OF CONTINUOUS CURVILINEAR METAL STRIPS PLACED ON BOTH SIDES OF A DIELECTRIC LAYER

The paper suggests a numerical analysis of electromagnetic wave scattering by a planar double-layered structure involving double-periodic strip gratings on both sides of a dielectric layer. The characteristics of the double-layered strip grating are analyzed in comparison with properties of a single plane array. The influence of the strip shift in neighboring gratings upon frequency dependence of reflection coefficient is also analyzed. Resonant dependences of surface current amplitudes on the strips are considered for the case of small separation between the grating layers.