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本文提出了一种新型非均匀网格的ＦＤＴＤ法，只需在大小网格连接边界上进行特殊处理，就能较好地解决计算量与精度之间的矛盾；采用本方法分析了柱体目标二维瞬时散射场，并与传统ＦＤＴＤ法作了比较。
In this paper, we propose a novel FDTD method for non-uniform grids, which can solve the contradiction between calculation and accuracy only by special processing on the boundary of grids. Two-dimensional instantaneous scattering field, and compared with the traditional FDTD method.