Abstract
Modeling wideband plane-wave propagation through a stratified magnetized plasma sheath is important toward predicting the quality of communications during re-entry, scattering caused by electron density perturbations, and many other applications. When using the finite-difference time-domain (FDTD) method to solve the problem, modeling the incident field in the simulation domain is difficult if the incident field travels obliquely to the grid axes. In this article, a total-field/scattered-field (TF/SF) formulation whereby a plane-wave source is introduced into cold layered magnetized plasma has been developed for the FDTD method. Based on phase matching theory, twelve auxiliary 1-D propagators are specified to calculate the correction field values for the TF/SF boundary. A modified convolution perfect match layer (CPML) is implemented to terminate the 1-D propagators. Numerical results are also presented to show the accuracy and effectiveness of the method. Although this method is developed for magnetized plasma, the extension to other anisotropic dispersive layered media is straightforward.
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