埋于介质中的二维多导体目标的微波成象  

Microwave Imaging of 2-D Multiple PEC Object Embedded in a Dielectric Region

作　　者：石守元[1] 李清亮[1] 葛德彪[1] 

机构地区：[1]西安电子科技大学物理系,陕西西安710071

出　　处：《电波科学学报》1997年第1期1-9,32,共10页Chinese Journal of Radio Science

基　　金：博士点基金;国防科技预研基金

摘　　要：提出了一种理于介质体内多导体目标几何特性和物理特性重建的迭代方法。应用Newton—Kantorovitch方法求解非线性方程组，得到关于目标特性矢量的Frechet导数，从而使非线性方程转化为“线性化”＋“迭代”的处理过程。另外，利用多方向TM平面波照射目标，并采用迭代方法克服病态问题。本文由噪声数据实现了一些散射目标的重建。An iterative method for reconstructing the shape of a 2-D multiple PEC objects embedded in a dielectric region and the permittivity of the dielectric mayerials is developed. By using the Newton-Kantorovitch method and deriving the Frbehet differential it semi-close form, the solutions of nonlinear equations can be cast into 'linear' + 'iterative' procedure. In order to overcome the illposeness, the object are successively illuminated by TM plane waves of lifferent angle of incidence and an iterative method is employed to solve the linear equation. each iteration. Some reconstruction results examply the appiicability and robustness of this scheme.

关 键 词：多导体目标 逆散射 MOM迭代 微波成象 

分 类 号：TN015[电子电信—物理电子学] TP722.6[自动化与计算机技术—检测技术与自动化装置]