摘要
针对传统双尺度法不能有效求解低掠入射散射特性的问题,通过在小尺度集平均中计及散射场的高阶微扰分量,而提出了一种高阶双尺度的新方法。通过高、低阶微扰法求解水平、垂直极化下的散射系数,分析了高阶场量在低掠入射下的修正效应,并讨论了不同粗糙度的情况,研究了高阶双尺度法的求解结果。和测量值的比较表明,考虑高阶散射分量的高阶双尺度法可以很好地求解粗糙表面的散射特性,从而证明该方法是正确而有效的。
As the classic two scale method （TSM） can not evaluate the electromagnetic scattering characleristics at low grazing angle （LGA）, a novel high order TSM （HTSM） is presented by including the high-order small perturbation scattering field component in the ensemble average of small scale roughness. The LGA effect modified by high-order field component at horizontally and vertically polarized incidences are analyzed by applying the classic small perturbation method （SPM） and high-order SPM. The modification effect by high-order component is compared at different roughness. The backscattering scattering coefficient obtained by HTSM for rough sea surface is studied and compared with the measured data. Results show that the HTSM is practical and accurate, especially at LGA condition, compared with TSM.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2007年第8期1230-1232,共3页
Systems Engineering and Electronics
关键词
粗糙海面
低掠入射
双尺度法
rough sea surface
low grazing incident
two-scale method
