A New FDTD Method for Arbitrary Dispersive Media

WANG Tong; ZHANG Wen-jun; GE Ren-wei

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A New FDTD Method for Arbitrary Dispersive Media

更新时间：2025-07-16

- A New FDTD Method for Arbitrary Dispersive Media
- Acta Electronica Sinica Vol. 29, Issue 6, Pages: 788-791(2001)
- 作者机构：
  
  上海大学通信系277信箱,上海,200072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN01
- Published：2001
- 稿件说明：
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WANG Tong, ZHANG Wen-jun, GE Ren-wei. A New FDTD Method for Arbitrary Dispersive Media[J]. Acta Electronica Sinica, 2001, 29(6): 788-791.
DOI：

WANG Tong, ZHANG Wen-jun, GE Ren-wei. A New FDTD Method for Arbitrary Dispersive Media[J]. Acta Electronica Sinica, 2001, 29(6): 788-791. DOI：

摘要

本文提出一种新的适用于各种复杂色散媒质的时域有限差分法

将色散媒质表征为一组无限冲激响应滤波器(IIR)

由此导出基于介电常数和导电系数的时域有限差分方程

并对算法的稳定性条件和数值色散关系进行分析.这种改进的FDTD能分析与频率有关的电磁场问题.为验证该方法的有效性和可靠性

本文用冲激响应不变法设计IIR滤波器模拟色散媒质

并对高斯脉冲入射色散媒质的情况进行数值模拟

结果与解析值完全吻合.

Abstract

A new frequency dependent FDTD method using DSP is presented for arbitrary frequency-dispersive medium.The dispersive medium is characterized as a set of infinite-impulse filters (IIR).Two algorithms employing frequency-dependent permittivity and frequency-dependent conductivity are derived.Their stability criteria and numerical dispersion are also studied.In order to demonstrate the effectiveness of this approach

several numerical examples are given in this paper.

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Transient Propagation and Scattering in Dispersive Media

The Calculation of EM Scattering by Buried Objects in Dispersive Media Through FD-TD Method

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