西安电子科技大学学报

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粗糙海面与上方多目标瞬态电磁散射混合算法

王强1,2;郭立新1;刘忠玉1   

  1. (1. 西安电子科技大学 物理与光电工程学院,陕西 西安 710071;
    2. 陕西学前师范学院 计算机与电子信息系,陕西 西安 710100)
  • 收稿日期:2017-11-23 出版日期:2018-10-20 发布日期:2018-09-25
  • 通讯作者: 郭立新(1968-), 男, 教授, E-mail: lxguo@xidian.edu.cn
  • 作者简介:王强(1976-), 男, 西安电子科技大学博士研究生, E-mail: qwangxj@163.com
  • 基金资助:

    国家自然科学基金创新研究群体科学基金资助项目(61621005); 国家自然科学基金资助项目(61431010, 61401345); 陕西省教育厅科学研究计划资助项目(15JK1180); 陕西学前师范学院科研基金资助项目(2016YBKJ075)

Hybrid method for transient electromagnetic scattering from multiple targets above the rough sea surface

WANG Qiang1,2;Guo Lixin1;LIU Zhongyu1   

  1. (1. School of Physics and Optoelectronic Engineering, Xidian Univ., Xi'an 710071, China;
    2. Dept. of Computer and Electronic Information, Shaanxi Xueqian Normal Univ., Xi'an 710100, China)
  • Received:2017-11-23 Online:2018-10-20 Published:2018-09-25

摘要:

为了提高时域算法的计算效率,提出了求解一维导体粗糙海面与其上方多目标复合电磁散射的时域混合算法.该算法将时域积分方程与时域基尔霍夫近似算法相结合,多目标散射以及目标之间的耦合散射通过时域积分方程精确求解,粗糙海面瞬态散射采用时域基尔霍夫算法近似求解.考虑到目标与粗糙面之间的耦合作用,建立了求解粗糙海面与其上方多目标复合瞬态散射的矩阵方程.通过与传统时域积分方程方法比较,表明混合算法既能保证数值结果精度,又能大大提高数值计算效率.

关键词: 电磁散射, 粗糙面, 多目标, 混合算法, 时域积分方程

Abstract:

In order to improve the calculation efficiency of the time-domain algorithm, a time-domain hybrid algorithm combining the time-domain integral equation (TDIE) with the time-domain Kirchhoff approximation (TDKA) is proposed to solve composite electromagnetic scattering from multiple targets above the one-dimensional conducting rough sea surface. In the hybrid method, the scattering of every target and the coupling scattering between them are accurately calculated by the TDIE method, and transient scattering from the sea surface can be estimated very well by the TDKA method. Taking into account the interactions between TDKA region and TDIE region, a time-domain matrix equation is given and used to solve the transient composite electromagnetic scattering from multiple targets above the rough sea surface. Compared with the conventional TDIE method, the hybrid method has a high computational efficiency and good calculation accuracy.

Key words: electromagnetic scattering, rough surface, multiple targets, hybrid method, time-domain integral equation