Scattering by two concentric ferrite anisotropic spheres

Based on spherical vector wave functions(SVWFs) in ferrite anisotropic medium, and the first, second spherical Bessel functions satisfying the same differential equation and recursive formula, the electromagnetic fields in two concentric ferrite anisotropic spheres, and free space can be expressed in terms of SVWFs in anisotropic ferrite medium, and isotropic medium. Applying the continue boundary conditions of electromagnetic fields in the interface of the ferrite anisotropic spherical shell, the coefficients of electromagnetic fields in terms of SVWFs in ferrite anisotropic medium in two concentric ferrite anisotropic spheres and scattering fields in free space are derived. Numerical results for the very general ferrite dielectric media are obtained and those in a special case are compared between the present method and the Method of Moments (MoM) speeded up with the Conjugate-Gradient Fast-Fourier-Transform (CG-FFT) approach. The present method can be probably used in antenna and radiowave propagation, etc.