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应用科学学报 ›› 2000, Vol. 18 ›› Issue (1): 20-23.

• 论文 • 上一篇    下一篇

遗传算法和FD-MEI方法应用于二维电磁成象

钱祖平, 洪伟   

  1. 东南大学微波国家重点实验室, 江苏南京 210096
  • 收稿日期:1998-10-15 修回日期:1999-03-17 出版日期:2000-03-31 发布日期:2000-03-31
  • 作者简介:钱祖平(1961-),男,江苏海门人,副教授,博士生.
  • 基金资助:
    国家杰出青年基金资助项目(69625102)

Application of Genetic Algorithm and FD-MEI Method to Electromagnetic Imaging

QIAN Zu-ping, HONG Wei   

  1. State Key Laboratory of Millimeter Waves, Department of Radio Engineering Southeast University, Nanjing 210096, China
  • Received:1998-10-15 Revised:1999-03-17 Online:2000-03-31 Published:2000-03-31

PDF

94

被引次数

6

摘要： 从电磁散射的微分方程出发,利用不变性测试方程(MEI方程)与有限差分法求解电磁散射问题,由等效原理与格林函数的渐近式求得远区散射场,以测量的散射场和计算的散射场的最大偏差为目标函数,通过遗传算法优化介质参数使目标函数达到最小值来重构散射体,最后给出反演结果.

关键词: 逆问题, 有限差分法, 成象, 遗传算法, 电磁散射

Abstract: In this paper, the forward scattering problem is analyzed by using the FD-MEI (finite difference measured equation of invariance) method. The far fields are then obtained by the equivalence principle and the asymptotic expression of Green's function. The objective function is constructed in terms of the maximum of difference between the computed scattering fields and the measured fields, and scattering cylinder is reconstructed through optimization of objective function with the genetic algorithm. Some numerical results of the reconstruction are presented.

Key words: imaging, genetic algorithm, electromagnetic scattering, inverse problem, finite difference method

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