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中文摘要：
基于矩量法（method of moment,MOM）及基尔霍夫近似（Kirchhoff approximation,KA）研究了分层粗糙面的电磁散射问题。首先,利用经典MOM求解了上层粗糙面的总场,包括直接入射场及由其激发的直接散射场。然后,将锥形入射波引入到传统KA中,利用其求解了分层粗糙面的透射场。数值计算并讨论了粗糙面高度起伏均方根、相关长度及分层粗糙面间距等参数对分层高斯粗糙面双站散射系数的影响。
英文摘要：
The problem of electromagnetic wave scattering by two layered media（rough interfaces） is analyzed based on method of moments（MOM） and Kirchhoff approximation（KA）.The total field,including the incident and the scattered fields,from the upper interface is solved by MOM,and the electromagnetic wave transmission field from the lower one is expressed from the KA with the tapered wave introduced as the incident wave.The numerical simulations are implemented,and the influences of the relative permittivity,the height root mean square,the correlation length,and the average heights between the two interfaces on the bistatic scattering coefficient are discussed for the Gaussian layered rough surface.
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