摘要
运用微扰法研究了平面电磁波入射随机粗糙面的电磁散射问题,得到了具有A.K.Fung海谱的粗糙海面散射截面的数学表达式,进一步得出了不同极化状态下散射系数的计算公式。通过数值计算得到了双站和单站两种情形下散射系数随散射角、风速、入射波频率变化的曲线,讨论了粗糙面高度起伏均方根、海水温度、风速、入射波频率对散射系数的影响,得出了具有A.K.Fung海谱的粗糙海面散射系数的特征。数值计算结果表明粗糙面高度起伏均方根、海水温度、风速、入射波频率对散射系数影响是比较复杂的。
The electromagnetic scattering from random rough sueface with plane electromagnetic wave incidence is studied using the Small Perturbation Method,and the mathematical expression of radar cross section of rough surface with A.K.Fung spectrum is derived,and the formulae of the scattering coefficient for different polarization is obtained.The curves of the scattering coefficient of mono-scattering and bistatic scattering with varying of the scattering angle,wind speed and the frequency of the incident wave are obtained by numerical implementation.The influences of the root mean squre,the temperature of seawater,wind speed and the frequency of the incident wave on the scattering coefficient are discussed,and the characteristics of scattering coefficient from rough surface with K.Fung spectrum is obtained.The numerical results show that the influences of the root mean squre,the temperature of seawater,wind speed and the frequency of the incident wave are very complex.
出处
《海洋通报》
CAS
CSCD
北大核心
2011年第2期226-233,共8页
Marine Science Bulletin
基金
中国博士后科学基金(20090461284)
关键词
电磁散射
微扰法
A.K.Fung海谱
散射系数
electromagnetic wave scattering
the Small Perturbation Method
A.K.Fung sea spectrum
the scattering coefficient
