Scattering by a plasma anisotropic coated sphere located in an off-axis Zero-order Bessel beam

Based on the Generalized Lorenz–Mie theory (GLMT), electromagnetic scattering of a plasma anisotropic coated sphere illuminated by an off-axis Zero-order Bessel beam (ZOBB) is investigated. The expansion expressions of the ZOBB are given in terms of the spherical vector wave functions (SVWFs) and the expansion coefficients are derived using the orthogonality of associated Legendre function and exponential function. By introducing the Fourier transform, the electromagnetic (EM) fields in the plasma anisotropic layer are expressed as the addition of the first and the second SVWFs. The scattering coefficients are analytically derived by applying the continuous tangential boundary conditions to each interface among the internal isotropic dielectric or conductor sphere, the anisotropic shell, and the free space. The accuracy of the theory and codes are verified by comparing the numerical results reduced to the special cases of a plane wave incidence and a plasma anisotropic sphere with results from references. The effects of the conical angle, the beam center position, coating thickness and dielectric parameters on the Radar cross section (RCS) are analyzed. The applications of this theoretical development in the fields of target shielding, and anti-radar coatings are numerically discussed.