| 基于Z变换法对双负媒质传播散射的FDTD分析 |
| |
| 引用本文： | 沈琛,马五星,吴先良. 基于Z变换法对双负媒质传播散射的FDTD分析[J]. 合肥工业大学学报(自然科学版), 2009, 32(12) |
| |
| 作者姓名： | 沈琛 马五星 吴先良 |
| |
| 作者单位： | 安徽大学,计算智能与信号处理教育部重点实验室,安徽,合肥,230039;安徽大学,计算智能与信号处理教育部重点实验室,安徽,合肥,230039;安徽大学,计算智能与信号处理教育部重点实验室,安徽,合肥,230039 |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 文章研究了分析双负媒质电磁散射规律的一种方法,双负媒质是介电系数和磁导系数均为负值的介质材料.引入色散Drude模型后,本构关系在时域成为卷积关系,因此将Z变换理论应用到双负媒质中的时域有限差分(FDTD)中,使FDTD可计算双负媒质中电磁波的散射和传播.该文对麦克斯韦方程做了修改,并给出双负媒质中介电系数和磁导系数均为频率函数的FDTD表达式.最后,数值仿真了电磁波与双负媒质平板的相互作用;计算了覆盖了双负媒质金属柱的电磁散射,探讨了双负媒质在隐身技术方面的应用前景.
|
| 关 键 词： | 双负(DNG)媒质 Z变换 时域有限差分法 电磁散射 |
Analysis of propagation and scattering from double-negative meta-materials based on Z-transform FDTD |
| |
| SHEN Chen,MA Wu-xing,WU Xian-liang. Analysis of propagation and scattering from double-negative meta-materials based on Z-transform FDTD[J]. Journal of Hefei University of Technology(Natural Science), 2009, 32(12) |
| |
| Authors: | SHEN Chen MA Wu-xing WU Xian-liang |
| |
| Abstract: | This paper studies a method for analyzing electromagnetic scattering from double-negative meta-materials.The double-negative(DNG)mediums are characterized by simultaneously negative permittivity and permeability.The Drude model is introduced,and the Z-transform is applied to the FDTD method in the DNG medium so that the FDTD method can be adopted in analyzing the electromagnetic scattering and propagation in the DNG medium.Some improvements are made on the Max well's equations and the frequency-dependent expressions of FDTD in the DNG medium are given.The interaction between the electromagnetic wave and the DNG medium is simulated numerically,the electromagnetic scattering of the conducting square cylinder coated with DNG mediums is calculated,and the potential application of the DNG medium in the future is also discussed. |
| |
| Keywords: | double-negative(DNG)medium Z-transform finite-difference time-domain method electromagnetic scattering |
| 本文献已被 万方数据 等数据库收录！ |
|
