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A Stability Improvement Technique Using PML Condition for the Three-Dimensional Nonuniform Mesh Nonstandard FDTD Method

机译:基于PML条件的三维非均匀网格非标准FDTD方法稳定性改进技术

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摘要

We propose a technique to improve the stability of three-dimensional (3D) nonuniform mesh nonstandard FDTD (NS-FDTD) calculations. To mitigate the numerical instability arising from the connection of different-sized meshes, our method combines the usual interpolation fields and perfectly matched layer (PML) condition at mesh interfaces. We examine a connection for a mesh size ratio of 3:1, and show numerically that our technique improves the stability of 3D NS-FDTD calculation on nonuniform meshes. Our technique is also applied to analyze the fields around a periodic slot panel.
机译:我们提出一种技术来提高三维(3D)非均匀网格非标准FDTD(NS-FDTD)计算的稳定性。为了减轻由于连接不同尺寸的网格而引起的数值不稳定性,我们的方法结合了常规的插值字段和网格接口处的完美匹配层(PML)条件。我们检查了3:1的网格尺寸比例的连接,并通过数字显示了我们的技术提高了非均匀网格上3D NS-FDTD计算的稳定性。我们的技术还被用于分析周期槽面板周围的场。

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