摘要
运用二阶小斜率近似方法研究了一维海面TE波和TM波的双站电磁散射.把海面的变化看做是高斯随机过程中的皮尔森-莫斯维茨谱,并且用锥形波入射以减少人为截断误差.给出了用二阶小斜率近似法研究一维海面双站散射的数值模拟结果,并与小斜率近似法和矩量法的数值计算结果进行了比较.结果表明,二阶小斜率近似方法比小斜率近似方法更准确.
In this paper,electromagnetic scattering from one dimensional dielectric sea surface is investigated for both TE and TM polarizations employing the second-order small slope approximation（SSA-II）. The second order terms of the small slope approximation method have been numerically implemented in order to obtain accurate results for a large range of slope. The sea surfaces are modeled as realizations of a Gaussian random process with Pierson-Moskowitz spectrum,while the tapered incident wave is chosen to reduce the truncation error. The numerical results obtained by SSA-II are presented by comparison with benchmark numerical method. Results show that the accuracy of SSA-II is better then that of SSA.
出处
《河南科学》
2014年第6期994-997,共4页
Henan Science
基金
国家自然科学基金项目(61379026)
关键词
电磁散射
海面
二阶小斜率近似法
electromagnetic scattering
sea surface
second-order small slope approximation（SSA-II）
