超电大尺寸海面电磁散射计算的混合面元法研究  

A Hybrid Facet Method for Computing the Electromagnetic Backscattering from Super Large Scale Sea Surface

作　　者：刘旭波 杨润秋 齐聪慧[2] 杨伟[2] LIU Xubo;YANG Runqiu;QI Conghui;YANG Wei(Unit 91977,PLA,Beijing 102249,China;School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]中国人民解放军91977部队,北京102249 [2]电子科技大学电子科学与工程学院,四川成都611731

出　　处：《无线电工程》2019年第11期975-979,共5页Radio Engineering

摘　　要：针对超电大尺寸含有卷浪海面电磁散射回波计算度复杂、计算时间长和计算机资源消耗量大的问题,提出一种基于散射中心理论的混合面元法,从而实现高频率下含有卷浪海面电磁散射回波的快速准确计算。该方法依据斜率将海面面元分成2种,对于平滑区域海面面元采用SPM算法,而对于含浪部分面元采用IEM算法,雷达照射范围内的海面电磁散射回波则根据散射中心理论将所有面元的远区电场叠加得到。通过对含有卷浪海面的电磁回波仿真分析,表明该算法与传统双尺度算法相比能够在保证计算速度的前提下,提高计算精度。To solve the problems of calculation complexity,long calculation time and large consumption of computer resources for computing the backscattering from super large scale sea surface,a hybrid facet method based on scattering center theory is proposed to achieve the high accuracy calculation of the backscattering from large scale sea surface with breaking waves.The sea surface is divided into two kinds of facets.For the facets which are smooth,the SPM method is applied to calculate the electromagnetic scattering;while for the facets which have breaking waves,the IEM method is used.Finally,the total scattering field of the sea area illuminated by the radar is computed according to the theory of scattering center.The simulation results show that the algorithm can improve the calculation accuracy while ensuring the calculation speed.

关 键 词：散射中心 混合面元法 海面回波 

分 类 号：TN926[电子电信—通信与信息系统]