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.

中文翻译：

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用于通过冷磁化等离子体鞘进行平面波传播的 FDTD 分析的全场/散射场公式

模拟通过分层磁化等离子体鞘层的宽带平面波传播对于预测再入期间的通信质量、电子密度扰动引起的散射以及许多其他应用非常重要。当使用时域有限差分（FDTD）方法解决问题时，如果入射场倾斜于网格轴传播，则很难在仿真域中对入射场进行建模。在本文中，已为 FDTD 方法开发了一种将平面波源引入冷层状磁化等离子体的全场/散射场 (TF/SF) 公式。根据相位匹配理论，指定了 12 个辅助一维传播器来计算 TF/SF 边界的校正场值。改进的卷积完美匹配层 (CPML) 用于终止一维传播器。还给出了数值结果以表明该方法的准确性和有效性。虽然这种方法是为磁化等离子体开发的，但扩展到其他各向异性色散层状介质是直接的。