超大电尺寸目标的物理光学高效算法分析

根据物理光学理论、理想导体边界条件和阻抗边界条件，建立了理想导体及有耗介质涂敷其表面的电大尺寸平板的物理光学高效算法公式，并将此公式推广到圆柱和球等相似表面。通过计算，给出了平板及圆柱的验证结果。以一个超大电尺寸目标RCS的计算实例充分证明了该方法的高效性和实用性。
关 键 词 物理光学方法; 高效算法; 超大电尺寸目标; 目标电磁散射特性

Abstract Based on the physical optics(PO) theory , perfectly electrical conductor(PEC)and leontovich boundary condition(IBC), the high-efficiency formula of the conducted flat and the PEC flat coated with radar absorb materials(RAM) is built up .This formula can also be used on the surface of cylinder and sphere surfaces. Meanwhile，several results are given to demonstrate the validation of this method. Finally, radar cross section (RCS) of an object with super large electrical size computed by this method shows the high efficiency and practicality.
Key words physical optics method; high-efficiency method; super large electrical size; electromagnetic characteristic of scattering