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介绍一种两点场关系的截断边界条件，它用数值方法以严格的方式来生成和逼近最佳边界条件内场节点和截断边界上点之间的关系是建立在电磁场满足格林函数的基础上这种边界条件与有限差分方程联立可以求解任意形状物体的散射问题，仅要求很少的计算时间和内存使用典型的算例验证了这种方法的优越性及实用性
A truncated boundary condition of two-point field relationship is introduced. It numerically establishes and approximates the optimal boundary conditions numerically. The relationship between the nodal point and the point on the truncation boundary is based on the fact that the electromagnetic field satisfies the Green’s function This boundary condition and the finite difference equation are combined to solve the scattering problem of arbitrary shape objects, and only require very little computation time and memory. The typical example is used to verify the superiority and practicability of this method