【摘要】 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.更多还原

【Abstract】 The multiple scattering of the complex targets has great influence on the accurate radar cross section(RCS) prediction of the target.A new method based on the graphic electromagnetic computing(GRECO) platform utilized the visualization character of the GRECO.The pixel was regarded as basic computation unit in this method.Employing geometric optics and physical optics in the electromagnetic computation theory,the RCS computation of the complex target was achieved after the acquisition of the pixel geometrical information and the search of the pixel pairs which meet the criterion of the multiple scattering.The computation examples of the dihedral corner reflector and the missile which are modeled with AUTOCAD software are given.Excellent agreement with the data from other literature indicates that the method has practical engineering value.更多还原