• 研究论文 • 上一篇    下一篇



  1. (1. 西安电子科技大学 理学院,陕西 西安 710071; 2. 中国电波传播研究所青岛分所,山东 青岛 453003)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-04-20 发布日期:2005-04-20

A new FDTD conform technique for scattering analysis

TANG Wei1,2;WU Zhen-sen1;LI Qing-liang1;DONG Hui2


  1. (1. School of Science, Xidian Univ., Xi′an 710071, China;
    2. Qingdao Branch, Chinese Research Inst. of Radiowave Propagation, Qingdao 453003, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2005-04-20 Published:2005-04-20

摘要: 提出一种新型的共形技术:假设导体边界附近电场呈线性变化,导体边界上电场为零,借用邻近场量,可以完成在相应边上电场环路积分.并证明了该方法有较好的收敛性,并将其应用电磁散射分析.导体柱和扁平双弧柱的计算表明,算法中空间步长可选择为λ/15,计算结果明显优于常规FDTD中计算精度.空间步长的增加可以减少内存和计算时间,证实了该方法的准确性和高效性.

关键词: FDTD, 共形技术, 电磁散射

Abstract: We present a new conformal finitedifference time-domain scheme for the electromagnetic scattering problem. It adopts the interpolation of the nearest electric components for the distort field and the deform area, which provides a more accurat value of the contour-path. We illustrate the application of the algorithm proposed here on scattering problem with several examples. Results show that the agreement between the conformal FDTD and the theory or the measured data is excellent even if the timestep by our method is longer than that by the conventional FDTD.

Key words: FDTD, conform scheme, electromagnetic scattering


  • TN011