圆柱面分层介质结构的微波成像

Microwave imaging for layered media cylindrical shell

讨论研究了圆柱面分层介质结构的微波成像问题 ,设计了一种基于源型积分方程的迭代成像算法。为改善算法的数值稳定性 ,设计采用了平面波在目标区域中心处的级数展开式中的各次柱面波作为入射波组合的处理方法 ,该处理方法同时可简化算法的分析计算过程。为验证算法的可靠性和有效性 ,文中对不同的介质结构分别进行了数值模拟 ,结果表明该文所设计的算法应用于不同介质结构时均能保持较高的准确性 ,并具有良好的数值稳定性。

In this paper, the microwave imaging for a layered media cylindrical shell has been discussed and investigated. An iterative algorithm based on a source-type integral equation has been presented. In order to improve the numerical stability of the algorithm, the different expansion terms, which constitute a cylindrical wave at the center of the shell region for a plane wave, are used as the incidence group. And the incidence group can also make it simple to formulate the algorithm and to do the numerical calculation. Several examples have been simulated to check the reliability and validity of the algorithm. The numerical results show that the algorithm can provide a relative accurate result for different geometrical dielectric distributions, and has a good numerical stability.