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Efficient description of fine features using digital filters in time-domain computational electromagnetics

机译:在时域计算电磁学中使用数字滤波器高效描述精细特征

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摘要

In this paper, the use of digital filters for the description of perforated metal plates in the time-domain transmission-line modelling (TLM) method is presented. The frequency-domain Prony method is used to approximate the analytic scattering coefficients of perforated plates using Laplace-domain functions. These functions are transformed into the Z-domain and the resulting digital filters are embedded into the TLM mesh. Three types of perforated plates are studied and the results obtained for the shielding effectiveness of equipment enclosures having perforated plates are shown.
机译:在本文中,提出了使用数字滤波器描述时域传输线建模(TLM)方法中的穿孔金属板。频域Prony方法用于使用Laplace域函数来近似穿孔板的解析散射系数。这些功能被转换为Z域,并将得到的数字滤波器嵌入到TLM网格中。对三种类型的穿孔板进行了研究,并显示了具有穿孔板的设备外壳的屏蔽效果。

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