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本文采用非均匀网格来扩大瞬变电磁场FDTD法计算区域,可在不增加甚至减少存贮量和计算量的情况下,有利于空间时间窗的应用,减小或避免截断边界对计算结果的影响,提高其精度和可靠性。本文以圆柱目标为例,讨论分析了采用吸收边界条件和本方法所得结果的可靠性。
In this paper, using non-uniform grid to expand the calculated area of the transient electromagnetic field FDTD method, without increasing or even reducing the amount of storage and computation circumstances, is conducive to the application of space time window to reduce or avoid the cut-off boundary of the calculation results Influence, improve its accuracy and reliability. In this paper, taking the cylindrical target as an example, the reliability of the results obtained by using the absorbing boundary conditions and the method is discussed and discussed.