分形海面及其上方目标电磁散射的混合算法

采用一维带限Weierstrass分形粗糙海面模拟实际的粗糙海面，运用基于矩量法(method of moment, MOM)结合基尔霍夫近似(Kirchhoff approximation, KA)的混合算法，研究了分形海面与上方需考虑旋转的复杂矩形截面导体柱的复合电磁散射。将不同入射角情形下的混合算法计算结果与传统的MOM结果进行了比对，结果表明该混合算法具有较高的准确性和计算效率。最后,讨论了复合散射系数与粗糙海面参数、目标参数以及入射波参数之间的依赖关系，得到了较完整的复合电磁散射特征。

Hybrid method of electromagnetic scattering between the fractal sea surface and its above targets

he 1D band limited Weierstrass fractal rough surface is proposed for describing the natural rough sea surface. The composite electromagnetic scattering between the fractal sea surface and the above vortical rectangular cross section conductor column is investigated using a hybrid method associated the method of moment (MOM) with the Kirchhoff approximation (KA). By comparing the results from the different incidence angles with the classical result calculated by the MOM method, it is obtained that the hybrid algorithm has a higher accuracy and computational efficiency. Finally, the dependencies between the composite scattering coefficient and the parameters including the rough sea surface, target parameters and incident wave parameters are discussed, and the more complete electromagnetic scattering characteristics are obtained.