Abstract
An analysis is presented of scattering from gratings composed of thin strips of resistive sheet material (more generally, impedance sheet material), that is characterized by an induced current in the sheet which is proportional to the tangential electric field at the sheet. The analysis make use of Galerkin's method and a spectral-domain expansion along the direction(s) of periodicity. The technique is numerically efficient for a broad class of two- and three-dimensional grating problems. The specific structures considered here are of constant cross section and consequently the scattering problems are two-dimensional. >
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