EM wave scattering by a dihedral strip grating

The dihedral strip grating is a thick screen which permits control over the strength of reflected and transmitted Floquet harmonics. Controllable is its frequency selectivity too. Plane-wave scattering from an infinite dihedral strip grating is formulated through an indirect mode matching technique based on Green´s second theorem. The solution is successfully checked against the principles of energy conservation and reciprocity. The effect of dihedral strip geometry on the characteristic spectral response, at the screen faces, and on the distribution of far-field scatter, is investigated through numerical examples. Corresponding results are given for horizontal, inclined and thick strip gratings