Application of the high‐order symplectic FDTD scheme to the curved three‐dimensional perfectly conducting objects
Application of the high‐order symplectic FDTD scheme to the curved three‐dimensional perfectly conducting objects
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DOI：
10.1002/mop.22306
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发表时间：
2007-04
影响因子：
1.5
通讯作者：
W. Sha;Xianliang Wu;Mingsheng Chen;Zhixiang Huang
中科院分区：
文献类型：
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作者：
W. Sha;Xianliang Wu;Mingsheng Chen;Zhixiang Huang
提出了一种使用对角分裂单元模型的高阶辛时域有限差分（SFDTD）方案来分析弯曲三维完美导电物体的电磁散射。一方面，对于未失真的单元，采用四阶精确空间差。另一方面，对于完全扭曲的单元，曲面的处理基于对角分裂单元模型。最后，对于部分扭曲的单元，提出插值策略以保持场分量连续。数值实验表明，对角SFTDD方案比阶梯SFTDD方案和传统对角FDTD方法能够获得更准确的结果。此外，鉴于数值稳定性高，改进的辛格式不需要减小时间增量来满足稳定性准则。 © 2007 Wiley periodicals, Inc. Microwave Opt Technol Lett 49: 931–934, 2007；在线发表于 Wiley InterScience (www.interscience.wiley.com)。 DOI 10.1002/mop.22306
A high‐order symplectic finite‐difference time‐domain (SFDTD) scheme using the diagonal split‐cell model is presented to analyze electromagnetic scattering of the curved three‐dimensional perfectly conducting objects. On the one hand, for the undistorted cells, the fourth‐order accurate spatial difference is employed. On the other hand, for the completely distorted cells, the treatment of the curved surfaces is based on the diagonal split‐cell model. Finally, for the partially distorted cells, the interpolation strategy is proposed to keep the field components continuous. The numerical experiments suggest that the diagonal SFDTD scheme can obtain more accurate results than both the staircased SFDTD scheme and the traditional diagonal FDTD method. Furthermore, in view of the high numerical stability, the improved symplectic scheme does not need to decrease time increment to comply with the stability criterion. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 931–934, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22306