The Analytical Solution to the Electromagnetic Scattering by an Anisotropic Ferrite-Coated Conducting Sphere
导体球涂覆各向异性铁氧体介质电磁散射的解析解

The analytical solution of electromagnetic scattering to an anisotropic ferrite-coated conducting sphere by a plane wave is discussed in this paper. It is well known that the electromagnetic fields in three-dimensional ferrite medium and free space can be expressed into spherical vector wave functions of the first, second, third and fourth in ferrite anisotropic medium and isotropic medium. Applying the continue boundary condition of tangential component of electromagnetic fields in the interface between the ferrite anisotropic medium and free space, and the tangential electric field vanishing in the interface of the conducting sphere, the expansion coefficients of electromagnetic fields with spherical vector wave function in ferrite medium and the scattering fields in free space can be derived. The theoretic analysis and numerical result show that when the radius of conducting sphere approaches zero, the present method can be reduced to that of the homogeneous ferrite anisotropic medium. The present method can be applied to the analyses of related microwave devices, antennas and the character of radar targets.