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在复杂目标的RCS计算中，各个部件之间的耦合是一个必须考虑的问题。本文采用物理光学（PO）方法，通过多次迭代，逐步修正各散射作上的面电流，然后采用Stratton－Chu积分得到RCS。本文应用IPO方法计算了相互垂直的两个导体板的散射近场和RCS。计算结果与用FDTD方法得到的结果有很好的一致性。IPO方法可望用于改进基于PO方法的高频近似方法，如面无法的计算精度。
In the complex target RCS calculation, the coupling between the various components is a problem that must be considered. In this paper, we use the physical optics (PO) method to iteratively correct the surface current of each scattering by multiple iterations, and then use the Stratton-Chu integral to get the RCS. In this paper, we use the IPO method to calculate the scattering near field and RCS of two conductor plates perpendicular to each other. The calculated results are in good agreement with the results obtained by the FDTD method. IPO method is expected to be used to improve the high-frequency approximation method based on PO method, such as the surface can not calculate the accuracy.