Gaussian beam scattering by a gyrotropic anisotropic object

An exact semi-analytical solution is presented to the scattering of an on-axis Gaussian beam incident on a gyrotropic anisotropic object. The on-axis incident Gaussian beam, scattered fields as well as internal fields are expanded in terms of appropriate spherical vector wave functions, and the unknown expansion coefficients of the scattered fields are determined by virtue of Schelkunoff's equivalence theorem and electromagnetic boundary conditions. Numerical results of the normalized differential scattering cross section are presented, and the scattering characteristics are discussed concisely. - Highlights: • Applying the EBCM to the case of a gyrotropic anisotropic object. • Gaussian beam scattering by a gyrotropic anisotropic object obtained. • T-matrix relating to the expansion coefficients determined.