SCATTERING OF AN ARBITRARY PLANE-WAVE BY AN INFINITE STRIP GRATING LOADED WITH A PAIR OF DIELECTRIC SLABS

An accurate numerical solution for the electromagnetic scattering from an infinite strip grating is presented, where the strips are loaded w ith a symmetrical pair of dielectric slabs. The direction of propagati on and the polarization of the incident plane wave are arbitrary. The boundary value problem is reduced to a solution of singular integral e quations, which are discretized by an application of the moment method . Numerical computations are performed mainly for the purpose of desig ning polarization diplexers. Dependence of diplexing characteristics o n grating parameters is examined in detail. Appearance of cross-polari zed field at skew incidence is referred.