海面散射对舰船编队电磁干扰影响的数学模型

从舰船编队的抗干扰需求出发,从海面散射对耦合途径的影响、海面散射路径和雷达波在海面上的反射特性3个方面建立起较为全面而系统的数学模型。首先结合镜像理论获取了海面散射的菲涅尔区,然后结合传统的＂四路径＂模型分析出舰船编队间电磁干扰的主要路径,最后结合海面的分形几何特性和海水的介电特性,推导出典型海况下海面的散射系数表达式。建立的数学模型不仅可以为舰船编队间电磁干扰的计算提供有力工具,还可以对遥感、海洋探测等多项技术予以理论支撑。

Mathematical Model of Influence of EMI from Sea Scattering on Ship Formation

A general and systemic mathematic model was established from three faces,effect of sea scattering on coupling route,scattering route on sea,and reflection characteristic of sea surface.Combining with enantiomorphous theory,the Fresnel region of sea scattering was obtained.Then,the main route of EMI between ships was analyzed with traditional ＂four-route＂ model.Finally,combined with geometrical fractal character and dielectric character of sea,the scattering coefficient expressions under typical sea were derived.The model can not only provides a powerful tool for EMI computation between ships formation,but also gives a theoretical support for more techniques,such as remote sensing and ocean detection.