In this letter, the effectiveness of a recently developed stretched coordinate (SC) perfectly matched layer (PML) formulation in the transmission line modeling (TLM) method is investigated for truncating the out-of-plane computational domain of different unit-cell-based frequency selective surface (FSS) simulations. Transmitted power is compared against various absorbing boundary conditions; the accuracy of each method is determined by benchmarking against results from method of moments (MoM) simulations. Good agreement with the MoM analysis is shown by the SC TLM-PML and, unlike the weakly stable split-field-based TLM-PML schemes, no instabilities are observed in the late time.

中文翻译：

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一种适用于分析平面周期结构的有效拉伸坐标TLM-PML

在这封信中，研究了最近开发的拉伸坐标 (SC) 完美匹配层 (PML) 公式在传输线建模 (TLM) 方法中的有效性，用于截断不同基于单元的平面外计算域频率选择表面 (FSS) 模拟。将传输功率与各种吸收边界条件进行比较；每种方法的准确性是通过对矩量法 (MoM) 模拟的结果进行基准测试来确定的。SC TLM-​​PML 显示出与 MoM 分析的良好一致性，并且与弱稳定的基于分裂场的 TLM-​​PML 方案不同，后期没有观察到不稳定性。