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Improved finite difference time-domain method for anisotropic magnetised plasma based on shift operator

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4 Author(s)
Ma, L.-X. ; Radar Eng. Dept., Air Force Eng. Univ., Sanyuan, China ; Zhang, H. ; Li, Z. ; Zhang, C.-X.

Based on the dispersion characteristic of magnetised plasma, an improved shift-operator finite difference time-domain (SO-FDTD) method for anisotropic medium is proposed. The constitutive relations between the polarised current density J and the electric field intensity E in the frequency-domain are written as a rational polynomial function, and the constitutive relations are deduced in the time-domain. Through a shift operator, the constitutive relations in the time-domain are transformed to the discrete time-domain. Thus, the recursion difference equations are obtained for each field component. Compared to the analytical method, current-density (JE) convolution finite difference time-domain method and the original SO-FDTD method, the high accuracy and efficiency of this method are verified by calculating the reflection and transmission coefficient of electromagnetic waves through a magnetised plasma slab.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:4 ,  Issue: 9 )