河南科学
河南科學
하남과학
HENAN SCIENCE
2014年
6期
994-997
,共4页
电磁散射%海面%二阶小斜率近似法
電磁散射%海麵%二階小斜率近似法
전자산사%해면%이계소사솔근사법
electromagnetic scattering%sea surface%second-order small slope approximation(SSA-II)
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。
運用二階小斜率近似方法研究瞭一維海麵TE波和TM波的雙站電磁散射。把海麵的變化看做是高斯隨機過程中的皮爾森-莫斯維茨譜，併且用錐形波入射以減少人為截斷誤差。給齣瞭用二階小斜率近似法研究一維海麵雙站散射的數值模擬結果，併與小斜率近似法和矩量法的數值計算結果進行瞭比較。結果錶明，二階小斜率近似方法比小斜率近似方法更準確。
운용이계소사솔근사방법연구료일유해면TE파화TM파적쌍참전자산사。파해면적변화간주시고사수궤과정중적피이삼-막사유자보，병차용추형파입사이감소인위절단오차。급출료용이계소사솔근사법연구일유해면쌍참산사적수치모의결과，병여소사솔근사법화구량법적수치계산결과진행료비교。결과표명，이계소사솔근사방법비소사솔근사방법경준학。
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.
