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复杂目标多次散射问题对于目标雷达散射截面(RCS,Radar Cross Section)的精确预估具有重要影响.以图形电磁计算(GRECO,Graphic Electromagnetic Lomputing)软件为平台,充分利用其可视化计算的特点,采用像素为基本计算单元,开发了一种多次散射计算方法.通过获取像素几何信息,搜索符合多次散射条件的像素对,并将高频计算方法中的几何光学和物理光学相结合,实现了对发生多次散射的复杂目标RCS可视化计算.应用AUTOCAD软件建立了角反射器和导弹模型,将最终计算结果与参考文献中计算结果进行对比,取得了较为理想的结果,证明了该方法具有很好的工程应用价值.
The complex target multipath scattering problem has an important influence on the accurate prediction of target Radar Cross Section (RCS). Based on GRECO (Graphic Electromagnetic Lomputing) software and taking full advantage of its visual computing characteristics, Pixel as the basic calculation unit, a multi-scatter calculation method is developed. By obtaining the pixel geometry information, searching for the pixel pairs that meet the conditions of multiple scattering and combining the geometrical optics and physical optics in the high-frequency calculation method, The complex target RCS with multiple scattering was visualized and calculated.Using AUTOCAD software to establish the corner reflector and missile model, the final calculation result was compared with the reference calculation result, and the ideal result was obtained. It is proved that this method has very good performance Good engineering value.