摘要
文章针对有耗电磁介质的重建问题发展了一种新的算法。该方法在反演过程中采用常用的非线性最小二乘法来求解逆问题,通过Tikhonov正则化得到描述散射场与散射体电特性参数之间关系的迭代方程,然后将迭代方程离散化得到适于数值计算的形式,并最终实现了介质双参数的同时反演。在此基础上对有耗介质的反演进行了详细的研究,计算结果表明该方法不仅能实现介质的空间定位,在介质的电磁参数的反演上也能满足精度的要求。
A novel algorithm for reconstruction of 2D lossy EM dielectric medium is developed.For short-time pulse signal,the forward problem is calculated by Finite-Difference Time-Domain Method（FDTD）,and the inverse problem is also solved in time-domain.Nonlinear least squares method is adopted to handle the inverse problem.Tikhonov regularization is used to get the iterative equation which is then discreted to calculate both the conductivity and permittivity of the scatter body.On this basis,detailed study is carried out to show the behavior of the algorithm.
出处
《微波学报》
CSCD
北大核心
2010年第5期34-37,共4页
Journal of Microwaves
基金
国防科技预研基金(200907451256)
