Shift Operator Method Applied for Two-dimensional Conducting Target Coated with Magnetized Ferrite in FDTD Analysis
磁化铁氧体覆盖二维导体目标FDTD分析的移位算子方法

The finite-difference time-domain(FDTD) method is extended to two-dimensional magnetic anisotropic dispersive media-magnetized ferrite by using Shift Operator(SO).It is proved that when the incident plane wave vector is perpendicular to the axis of the two-dimensional axial magnetized ferrite cylinder,the electromagnetic wave can be decomposed into Transverse Electric(TE) and Transverse Magnetic(TM) waves.The electromagnetic scattering characters of TE wave have no relation with the target,but the electromagnetic scattering characters of TM wave have close relations with the electromagnetic parameters in magnetized ferrite.The physical reasons are analyzed.The FDTD with shift operator(SO-FDTD) formulations in this case are derived based on the constitutive relation for magnetized ferrite and shift operator,which leads to the electromagnetic wave propagation of both anisotropy and frequency dispersion media being solved at the same time.For the electromagnetic scattering of Von Karman shaped conducting cylinder coated with anisotropic magnetized ferrite,the effect of the ferrite parameters on the bistatic Radar Cross Section(RCS) is investigated and some numerical results are obtained.The results indicate that an appropriate ferrite coating may efficiently reduce the RCS of a metallic target,and expjωt denotes the convention of time dependence.