Method of Calculating Modal Absorbing Boundary Condition for Waveguide Problems

LI Si-min; ZHANG De-kun; LIN Wei-gan

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Method of Calculating Modal Absorbing Boundary Condition for Waveguide Problems

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- Method of Calculating Modal Absorbing Boundary Condition for Waveguide Problems
- Acta Electronica Sinica Vol. 29, Issue 9, Pages: 1256-1258(2001)
- 作者机构：
  
  1. 桂林电子工业学院电子工程系,广西,桂林,541004
  2. 电子科技大学应用物理所,四川,成都,610054
  3. 桂林电子工业学院电子工程系广西桂林,541004
  4. 电子科技大学应用物理所四川成都,610054
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957
- Published：2001
- 稿件说明：
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LI Si-min, ZHANG De-kun, LIN Wei-gan. Method of Calculating Modal Absorbing Boundary Condition for Waveguide Problems[J]. Acta Electronica Sinica, 2001, 29(9): 1256-1258.
DOI：

LI Si-min, ZHANG De-kun, LIN Wei-gan. Method of Calculating Modal Absorbing Boundary Condition for Waveguide Problems[J]. Acta Electronica Sinica, 2001, 29(9): 1256-1258. DOI：

摘要

本文对基于波导中模式冲击响应构造

并应用于时域有限差分(FDTD)方法的模式吸收边界条件

进行了详细地计算和分析.本文应用高阶插值方法

显著地提高模式吸收边界条件计算的精度

采用点匹配法鉴别模式幅度

加快了计算模式吸收边界条件的速度.计算结果表明

采用模式吸收边界条件可以有效地减少FDTD方法中的节点数目

从而提高了FDTD方法的效率.

Abstract

Based on impulse response of modes in a uniform waveguide

a modal absorbing boundary condition

employed in finite difference-time-domain(FDTD) method

is specially calculated and investigated in this paper.The high order interpolated method is used to significantly improve the accuracy of modal absorbing boundary condition

and computing speed is accelerated by applying point matched method to identify the amplitude of modes.The numerical simulation shows that the number of nodes of FDTD can be dramatically reduced by applying the modal absorbing boundary condition that leads to the improvement of the efficiency of FDTD method.

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