two IEEE papers request

Hi all
1)Scattering of a plane wave by an anisotropic ferrite-coated conducting sphere
Geng, Y.-L.
Microwaves, Antennas & Propagation, IET
Volume 2, Issue 2, March 2008 Page(s):158 - 162
Digital Object Identifier 10.1049/iet-map:20070075
Summary:On the basis of the three-dimensional spherical vector wave functions in ferrite anisotropic media, and the fact that the first and second spherical vector wave functions in ferrite anisotropic media satisfy the same differential equations, the electromagnetic fields in homogeneous ferrite anisotropic media can be expressed as the addition of the first and second spherical vector wave functions in ferrite anisotropic media. Applying the continue boundary condition of the 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 in terms of spherical vector wave function in ferrite medium and the scattering fields in free space can be derived. The theoretical analysis and numerical result show that when the radius of a conducting sphere approaches zero, the present method can be reduced to that of the homogeneous ferrite anisotropic sphere. The present method can be applied to the analyses of related microwave devices, antennas and the character of radar targets.

2) Analysis of electromagnetic scattering from objects coated with arbitrarily magnetized lossy ferrite materials
Pai Wang; Lezhu Zhou; Mingyao Xia; Yunhua Tan
Magnetics, IEEE Transactions on
Volume 42, Issue 4, April 2006 Page(s): 791 - 794
Digital Object Identifier 10.1109/TMAG.2006.871674
Summary: In this paper, analysis and discussion of electromagnetic scattering from objects coated with arbitrarily magnetized lossy ferrite materials are carried out by using the hybrid vector finite element method and multilevel fast multipole algorithm. For a coated cube as an example, the impact of anisotropy properties controlled by magnetized ferrite materials on the scattered field characteristics is considered. Numerical results show that the strength and direction of the biased magnetic field strongly affect the backscattered field.

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