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本文首次采用时域有限差分法（FDTD）［1］和修正的完全匹配层（MPML）吸收边界条件［2］，对16单元的微带缝隙直线阵列天线进行了全波、宽带、一体化分析．文中讨论了MPML在微带结构中的设置方法和完全匹配条件，比较了采用PML［11］，MPML两种吸收边界条件的结果，结果表明，由于微带阵列天线近场比孤立的微带天线包含更多的衰减较慢的凋落波，PML难以吸收这些凋落波而产生较大误差，MPML在吸收旧落波方面明显优于PML，具有较高的精度．
For the first time, the full-wave, broadband and integrative analysis of a 16-unit microstrip slotted linear array antenna has been carried out for the first time using FDTD [1] and modified MPML absorption boundary conditions [2] . In this paper, the setting method and exact matching condition of MPML in microstrip structure are discussed. The results of two kinds of absorption boundary conditions using PML [11] and MPML are compared. The results show that as the near-field of microstrip array antenna is smaller than the isolated microstrip antenna Contains more decaying waves that decay slower, and PML can not absorb these decay waves with great errors. MPML is superior to PML in absorbing old bursts and has higher accuracy.