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应用快速多极子方法求解有耗半空间环境中任意三维金属体的雷达散射特性。对于基函数与测试函数的近场组作用,我们用离散复镜像法严格处理半空间并矢格林函数。在处理远场区时,我们利用实镜像源和反射系数近似计算交界面处远场的作用。通过位于有耗半空间三面角反射器、立方体证明了方法的正确性和有效性。另外,将多分辨预处理器和快速多极子方法结合使得矩阵求解器的迭代次数和计算时间减少数倍。
A Fast Multipole Method for Solving Radar Scattering Characteristics of Any 3D Metal Body in a Half - Space Consumption Environment. For the near-field group function of the basis function and the test function, we strictly handle the half-space dyadic Green’s function by the discrete complex image method. In dealing with the far field region, we use the real mirror source and reflection coefficient to approximate the effect of the far field at the interface. The cube proves the correctness and effectiveness of the method through the tri-corner reflector located in a half-space-consuming space. In addition, combining the multiresolution preprocessor with the fast multipole method reduces the number of iterations and computation time of the matrix solver by a factor of several.