| 网格长度对FDTD计算的影响 |
| |
| 引用本文： | 李军,武振波,武哲.网格长度对FDTD计算的影响[J].微波学报,2003,19(3):18-21. |
| |
| 作者姓名： | 李军 武振波 武哲 |
| |
| 作者单位： | 北京航空航天大学,北京,100083 |
| |
| 摘 要： | 基于平面波传播的物理性质，提出一种FDTD改进方法——在研究稳态问题时，为保证数字波前与入射方向垂直，网格划分不能是固定的，其长度之比应随人射方向变化。研究了改进方法对数值色散的影响，并与传统方法作了比较。在三维Yee网格中对平面波的模拟结果表明，改进方法的收敛性能大为提高，对远场散射的误差影响小。
|
| 关 键 词： | FDTD 网格长度 数值色散 平面波传播 远场散射 时域有限差分 |
| 文章编号： | 1005-6122(2003)03-0018-04 |
| 修稿时间： | 2002年10月25 |
Effects of Gridding Length on FDTD Calculation |
| |
| Li Jun,Wu Zhenbo,Wu Zhe.Effects of Gridding Length on FDTD Calculation[J].Journal of Microwaves,2003,19(3):18-21. |
| |
| Authors: | Li Jun Wu Zhenbo Wu Zhe |
| |
| Abstract: | An improved FDTD method is presented in the paper based on the physics characteristic of plane wave propagation. Spatial increments can not be fixed and should vary with the change of the angle of incidence, which can ensure that numerical wave front is perpendicular to the direction of incidence. The effects of the improved method on numerical dispersion are studied and comparisons are made to the conventional FDTD method. The simulation results of plane wave in three-dimensional Yee mesh show the convergence performance is increased and the new method has less influence on the calculation errors of far field scattering. |
| |
| Keywords: | FDTD method Gridding length Numerical dispersion Far field scattering |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《微波学报》浏览原始摘要信息 |
|
点击此处可从《微波学报》下载全文 |
