二维磁等离子体目标FDTD分析的移位算子方法

doi:10.3969/j.issn.1001-2400.2011.01.014

Abstract

Abstract:

The finite-difference time-domain(FDTD) method is extended to two dimensional anisotropic dielectric dispersive media—magnetized plasma by using Shift Operator(SO). It is proved that when the incident plane wave vector is perpendicular to the axis of the 2-dimensional axial magnetized plasma cylinder, the electromagnetic wave can be decomposed into Transverse Electric(TE) and Transverse Magnetic(TM) waves, with the electromagnetic scattering characters of the TM wave having no relation with the external DC magnetic field but the electromagnetic scattering characters of the TE wave having close relations with the electromagnetic parameters in magnetized plasma. The physical reasons have been analyzed. The FDTD with shift operator (SO-FDTD) formulations in this case is derived based on the constitutive relation for the magnetized plasma and shift operator. For electromagnetic scattering of the Von Karman shaped conducting cylinder coated with anisotropic magnetized plasma, the effect of coating thickness and plasma parameters on the bistatic Radar Cross Section(RCS) is investigated, with some numerical results obtained. The results indicate that appropriate plasma coating may efficiently reduce the RCS of a metallic target.

Key words: FDTD, shift operator, magnetized plasma, Von Karman, RCS

10.3969/j.issn.1001-2400.2011.01.014. Shift operator method applied for the 2-dimensional conducting target coated with magnetized plasma in FDTD analyses[J].J4, 2011, 38(1): 85-89+130.

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Shift operator method applied for the 2-dimensional conducting target coated with magnetized plasma in FDTD analyses

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