Numerical Solution of Electromagnetic Wave Diffraction by Plane Semi-Infinite Strip Grating

Abstract

The problem of electromagnetic H-polarized wave diffraction by a semi-infinite grating of plane metal strips is solved numerically as a pioneering work. The created algorithm allows obtaining the solution of the nonlinear operator equation with respect to the Fourier amplitudes of the reflected field by the method of successive iterations. The choice of initial approach is substantiated and the convergence of the solution is numerically verified. The field reflected by the semi-infinite grating is calculated and analyzed for various numerical values of the angle of incidence of excitation wave, the wavelength and the strip width.