In this paper, B 3 spline surfaces are introduced to model complex objects, then the radar cross section (RCS) of complex objects modeled with B_3 spline surfaces is calculated by the physical optic (PO) method.

• 引入B3样条曲面片拟合目标外形，然后利用物理光学（PO）技术分析由B3样条曲面构成的目标的雷达散射截面（RCS）。