The Treatment of Thin Wire and Coaxial Structures in Lossless and Lossy Media in FDTD by the Modification of Assigned Material Parameters
The Treatment of Thin Wire and Coaxial Structures in Lossless and Lossy Media in FDTD by the Modification of Assigned Material Parameters
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DOI：
10.1109/temc.2006.884452
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发表时间：
2006-11
影响因子：
2.1
通讯作者：
C. Railton;D. L. Paul;S. Dumanli
中科院分区：
文献类型：
--
作者：
C. Railton;D. L. Paul;S. Dumanli
最近的研究表明，在时域有限差分法（FDTD）中使用修改的指定材料参数（MAMPs）为微带结构的电磁分析提供了一种系统的、易于扩展的、准确的和有效的方法。在本文中，它表明，这种技术也可以应用于同等效果的无损和有损同轴电缆，电线在一个有损耗的介质，如接地网，和更复杂的结构，其中包括同轴馈电和短路后。修正后的参数直接从导线附近的已知渐近场计算，而不依赖于“等效半径”的概念。and the Results showed that the results are equal or上级.“
It has been shown recently that the use of modified assigned material parameters (MAMPs) within the finite-difference time-domain (FDTD) method provides a systematic, readily extensible, accurate, and efficient approach to the electromagnetic analysis of microstrip structures. In this paper, it is shown that this technique can also be applied with equal effect to lossless and lossy coaxial lines, wires in a lossy medium such as earthing grids, and more complex structures which include coaxial feeds and shorting posts. The modified parameters are calculated directly from the known asymptotic fields near the wire and do not rely on the concept of "equivalent radius." Results are given which show equal or superior performance compared to those obtained using other methods but with the added advantage of flexibility and rigor