半无限大空间中二维目标微波成象的新方法

应用科学学报 ›› 1999, Vol. 17 ›› Issue (2): 183-188.

半无限大空间中二维目标微波成象的新方法

卿安永¹, 李敬², 任朗², 钟顺时³

1. 上海大学;
2. 西南交通大学

收稿日期:1997-10-02 修回日期:1998-03-29 出版日期:1999-06-30 发布日期:1999-06-30
基金资助:
国家自然科学基金资助项目

A Novel Method for Microwave Imaging of Two Dimensional Electromagnetic Target in Half Space

QING ANYONG¹, LI JING², REN LANG², ZHONG SHUNSHI³

1. Department of Communication, Shanghai University, Shanghai 201800;
2. Institute of EM Theory and Microwave Technology, Southwest Jiaotong University Chengdu, 610031

Received:1997-10-02 Revised:1998-03-29 Online:1999-06-30 Published:1999-06-30

摘要/Abstract

摘要： 提出了一种利用模拟测量得到的时域散射信息对埋于半无限大空间中的二维电磁目标进行微波成象的新方法——时域变分迭代法(Time-Domain Variational Iterative Method,TVIM).列举了一些典型的数值反演实例,并与有关文献结果作了比较,考察了TVIM的收敛性能、反演复杂目标能力和抗随机噪声等反演性能,从理论上分析了形成TVIM良好反演性能的原因.

关键词: 微波成象, 二维电磁目标, 半无限大空间

Abstract: A novel method for microwave imaging of two-dimensional lossless electromagnetic target which buried in half space using time-domain scattering data is presented in this paper.It is an iterative method derived volume equivalence principle,variation principle,Fourier transform.We name it as time-domain variational iterative method(TVIM).In each iteration,both the direct and inverse problems are solved once.The direct problem is solved by finite-difference time-domain(FDTD) method and the inverse problem is solved iteratively.Some Typical numerical results are given to show its inversion performance such as converging property,ability to invert arbitrary targets,tolerance of random noise et al.Comparision with our former method is also done.Those factors which make TVIM performs better are investigated.

Key words: two-dimensional electromagnetic target, microwave imaging, half space

卿安永, 李敬, 任朗, 钟顺时. 半无限大空间中二维目标微波成象的新方法[J]. 应用科学学报, 1999, 17(2): 183-188.

QING ANYONG, LI JING, REN LANG, ZHONG SHUNSHI. A Novel Method for Microwave Imaging of Two Dimensional Electromagnetic Target in Half Space[J]. Journal of Applied Sciences, 1999, 17(2): 183-188.