Electromagnetic scattering by dielectric cylinder half-immersed in the perfectly conducting half-space

To investigate the features of various media by means of electromagnetic radiation, it is necessary to know the field scattered by the nonhomogeneities of this media. This problem can be solved with sufficient accuracy and adequacy by using, as a basis, a rigorous solution of the basic model (Nefedov 1979). One of the basic models for this purpose can be the considered structure. The aims of this paper are to investigate the scattering of a plane wave by a circular dielectric cylinder (CDC), half immersed in the perfectly conducting half-space; the method of re-expanding in terms of the basis functions at the given interval is used (Smimov 1957; Shepilko 1979). Applying the boundary condition to the Fourier-Bessel series representation of the scattered field, our problem is reduced to the solution of a matrix equation for unknown expansion coefficients. These coefficients are determined numerically with high accuracy after truncation of the matrix equation. The scattered field is evaluated asymptotically and the backscattering radar cross section (BRCS) expression is derived. Accurate numerical results are presented for the E- and H-polarized waves