Analysis of Waveguide Circuits Using the ADI-FDTD+GRT Method ZHANG Yan,L Shan-wei

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Analysis of Waveguide Circuits Using the ADI-FDTD+GRT Method ZHANG Yan,L Shan-wei

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- Analysis of Waveguide Circuits Using the ADI-FDTD+GRT Method ZHANG Yan,L Shan-wei
- Acta Electronica Sinica Vol. 33, Issue 9, Pages: 1688-1690(2005)
- 作者机构：
  
  北京航空航天大学电子信息工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： O441.4
- Published：2005
- 稿件说明：
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Analysis of Waveguide Circuits Using the ADI-FDTD+GRT Method ZHANG Yan,L Shan-wei[J]. Acta Electronica Sinica, 2005, 33(9): 1688-1690.
DOI：

Analysis of Waveguide Circuits Using the ADI-FDTD+GRT Method ZHANG Yan,L Shan-wei[J]. Acta Electronica Sinica, 2005, 33(9): 1688-1690. DOI：

摘要

本文研究时域有限差分法(FDTD)的一种新的时空压缩技术

并应用于波导电路的分析.首先分析了软激励条件下的改进的几何重置技术(GRT)

研究了合理选择源面与参考面的放置位置

使GRT不仅减小了吸收边界对计算结果的影响

而且节省了计算空间

还可以精确得到全部散射参量.另外阐述了与交替方向隐式时域有限差分法(ADI-FDTD)相结合

使计算空间和时间同时被压缩

达到节省计算资源的目的.为了衡量ADI-FDTD+GRT算法的计算精度和效率

分析了包含不连续结构的波导作为算例

将其数值计算结果分别与传统FDTD和HFSS作比较

并将端面和参考面不同间距的ADI-FDTD+GRT与传统ADI-FDTD在仿真结果和资源占用方面进行对比

结果表明本文算法是精确和高效的.

Abstract

Attention is focused on analysis of waveguide circuits using the ADI-FDTD+GRT method to reduce the computational resources required.First

the conventional Geometry Rearrangement Technique (GRT) is modified for the soft source excitation and whole S-parameters can be obtained by locating the source plane and the reference planes correctly.Not only the dominant boundary reflection can be cancelled but also the computational domain can be reduced by the modified GRT.And then the Alternating-Direction Implicit Finite-Difference Time-Domain (ADI-FDTD) method is combined with the modified GRT.By the ADI-FDTD+GRT method the computational time and domain are saved

respectively.In order to demonstrate the computational accuracy and efficiency of this method

a waveguide with discontinuous structure is simulated as an example.The numerical results of this method are compared with those obtained by the conventional FDTD method and the HFSS.In addition the numerical results and the computational requirements of the different ADI-FDTD+GRT cases are compared with those of the conventional ADI-FDTD method.It is found that this method is accurate and efficient.

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