An Improved Time-Domain Electromagnetic Inverse Scattering Technique for Multi-Pole Debye Dispersive Media

LIU Guang-dong; GE Xin-tong

doi:10.3969/j.issn.0372-2112.2015.12.026

您当前的位置：

首页 >

文章列表页 >

An Improved Time-Domain Electromagnetic Inverse Scattering Technique for Multi-Pole Debye Dispersive Media

更新时间：2025-07-16

- An Improved Time-Domain Electromagnetic Inverse Scattering Technique for Multi-Pole Debye Dispersive Media
- Acta Electronica Sinica Vol. 43, Issue 12, Pages: 2518-2524(2015)
- 作者机构：
  
  1. 阜阳师范学院物理与电子工程学院,安徽,阜阳,236037
  2. 阜阳师范学院数学与统计学院,安徽,阜阳,236037
  3. 阜阳师范学院物理与电子工程学院,安徽,阜阳,236037
  4. 阜阳师范学院数学与统计学院,安徽,阜阳,236037
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2015.12.026
  CLC： TN95O441O451
- Published：2015
- 稿件说明：
移动端阅览
LIU Guang-dong, GE Xin-tong. An Improved Time-Domain Electromagnetic Inverse Scattering Technique for Multi-Pole Debye Dispersive Media[J]. Acta Electronica Sinica, 2015, 43(12): 2518-2524.
DOI：

LIU Guang-dong, GE Xin-tong. An Improved Time-Domain Electromagnetic Inverse Scattering Technique for Multi-Pole Debye Dispersive Media[J]. Acta Electronica Sinica, 2015, 43(12): 2518-2524. DOI： 10.3969/j.issn.0372-2112.2015.12.026.

摘要

在已有的经验模型中

多极德拜(Debye)模型最适合高精地描述生物组织、土壤、水等媒质的色散特性.为了同时反演这类媒质的电磁参数

本文提出了一种时域逆散射改进技术:分别应用迭代法和吉洪诺夫(Tikhonov)正则化技术克服逆问题的非线性和病态性困难;解析导出了目标泛函关于目标参数的梯度;迭代重建过程中

产生的正演、反演子问题分别选用时域有限差分(FDTD)法、共轭梯度(CG)法求解.噪声环境下

通过两个一维(1-D)的数值算例

初步证实了该技术的可行性和鲁棒性.

Abstract

The Debye model with multiple relaxation times is most suitable for highly accurate description of the dispersion characteristics of many media

such as biological tissues

soil

and water

among the developed empirical models.In order to reconstruct the electromagnetic properties of these dispersive media simultaneously

a modified time-domain inverse scattering technique is presented.Firstly

in the proposed technology

the nonlinearity and ill-posedness of the inverse problem is circumvented by an iterative method and the Tikhonov's regularization

respectively.Secondly

a set of closed gradients (Frchet derivatives) of its cost functional with respect to objective parameters are derived for the aforementioned inverse problem.Then

the finite-difference time-domain (FDTD) method and any conjugate gradient (CG) method is applied

at its each iteration

to solve the resulting forward and backward sub-problem

respectively.Lastly

the feasibility and robustness for the inversion technique are preliminarily confirmed by two one-dimensional (1-D) numerical examples where a model of the additive white Gaussian noise (AWGN) is considered.

关键词

Keywords

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

An Approach to the Time-Domain Inverse Scattering Problem for the Stratified Frequency-Dispersive Lossy Media

Diffraction Tomography in Lossy Background with Phaseless Data

An Electromagnetic Inverse Scattering Technique in Time Domain for Drude Dispersive Media

Related Author

LIU Guang-dong

ZHANG Ye-rong

LIU Yan-li

LI Lian-lin

LI Fang

Related Institution

College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications

College of Physical and Electronic Science,Fuyang Teachers College

College of Electronic Science and EngineeringNanjing University of Posts and TelecommunicationsNanjingJiangsu 210003China

College of Physical and Electronic ScienceFuyang Teachers CollegeFuyangAnhui 236037China

Institute of Electronics,Chinese Academy of Sciences

⁰