基于辛算法海面与目标电磁散射研究  

EM Scattering Analysis of Fraction Sea Surface and Its above Target based on Symplectic Algorithm

作　　者：陈静[1] 李民权[1] 刘义[1] 

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230039

出　　处：《通信技术》2011年第11期35-36,40,共3页Communications Technology

基　　金：安徽省教育厅自然科学基金资助项目(No.KJ2011A007)

摘　　要：为了克服时域有限差分(FDTD)的缺陷我们引入辛算法理论(SFDTD),结合辛算法的稳定性分析了海面与其上方目标的复合电磁散射特性,并分析了入射角度,风速等对复合散射特性的影响,首先给出了Weiersstrass分形海面模型,数值结果表明分维度和风速的变化都会引起海面的粗糙程度很大的变化,同时目标的存在对海面散射影响很大,它使得海面的散射能量会有相应的增加,并且风速的增大使得海面粗糙度增大,这样在其他方向上散射逐渐增强,而在镜像方向上的增强越来越不明显。In order to overcome the deficiency of conventional finite difference time domain（FDTD）,the symplectic algorithm is adopted.Owing to the stability of symplectic algorithm,the complex EM scattering of fractional sea surface,and its above target is analyzed,including the impacts of incident angle and wind velocity on this complex scattering.The model of Weiersstrass fractional sea surface is given in this paper.The numerical result indicates that the sub-dimensions and wind velocity would produce great impacts on the rough factor of the sea surface,and the existence of a target would exert a great impact on the sea surface scattering and cause a corresponding increase in energy,while the increase of wind speed makes the enhancement of sea surface roughness,so that the scattering enhancement in other direction gradually increases but in the mirror image direction becomes not so remarkable.

关 键 词：辛算法 分形海面 电磁散射 

分 类 号：TN011[电子电信—物理电子学]