English

应用科学学报 ›› 1997, Vol. 15 ›› Issue (3): 253-258.

• 论文 •    下一篇

二维目标的微波成像新方法

卿安永, 李敬, 任朗   

  1. 西南交通大学
  • 收稿日期:1996-03-17 修回日期:1996-06-08 出版日期:1997-09-30 发布日期:1997-09-30
  • 作者简介:卿安永:博士,西南交通大学电磁场与微波技术研究所,成都 630031
  • 基金资助:
    国家自然科学基金

A NOVEL METHOD FOR MICROWAVE IMAGLNG OF TWO-DIMENSIONAL TARGETS

QING ANYONG, LI JING, REN LANG   

  1. Institute of Electromagnetic Field and Microwave Technology, Southwest Jiaotong University, Chengdu 610031
  • Received:1996-03-17 Revised:1996-06-08 Online:1997-09-30 Published:1997-09-30

PDF

60

被引次数

3

摘要： 首先从体等效原理出发,得到一个积分方程组,该方程组将目标的介电常数与目标内总场及接收点上的散射场联系起来.随后,对该方程组求变分,寻求散射场对目标介电参数的梯度方向,得到反演方程.文中列举了几个典型反演实例,考察了方法的收敛速度、运行时间及对复杂目标的适应能力等因素,所得结果相当令人满意.为了尽量与实际探测接近,文中还讨论了方法抗随机噪声的能力,模拟表明,该方法具有相当强的抗噪声性能.

关键词: 微波成像, 二维目标, 变分, 随机噪声

Abstract: The microwave imaging of two dimensional targets is discussed in this paper.By volume equivalence principle, a system of integral equations is obtained. They link the media's permittivity and conductivity with scattering field and total field. Then, the inversion equation is obtained after taking variation on these integral equations. Some properties including the converging speed, inversion accuracy and its ability to inverse complex targets are investigated. The effect of random noise is also discussed in this pa-per.

Key words: two dimensional targets, microwave imaging, variation, random noise