Mladyonov P. Electromagnetic wave diffraction by the planar doubly-periodic gratings of uninterrupted curvilinear strips

The object of research is effects of diffraction of the electromagnetic fields by the planar doubly-periodic gratings of metal strips. The purpose of the research: development of the numerical method, its application for calculation of electrodynamics characteristics of electromagnetic fields scattered by the planar doubly-periodic gratings of metal strips. Methods of research: the theoretical analysis is based on the method of integral equations in the density of surface current which are obtained from boundary conditions. Theoretical and practical new results: for a planar chiral structure the effect of asymmetry of the field polarization transformation for the counter propagating incident waves is optained and the complete explanation of the effect is presented. The theory of diffraction is first developed by the two-layer structure. New high-quality resonances of reflection coefficients are discovered for one- and two- layer structures from uninterrupted curvilinear strips. The sharp of input impedance growth at the resonance frequency and the increase of an absorption in the presence of loss are revealed for the structure of curvilinear strips placed on a grounded dielectric substrate. The field of application: microwave engineering, spectroscopy, diffraction electronics, communication systems, design of novel materials and surfaces with specific properties