摘要
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．
A full-wave integrated time domain analysis of the 1×16 element microstrip array antenna is carried out by finite difference-time domain(FDTD)method.The modified Berenger PML(MPML)absorbing con dition is used in the analysis.The MPML is more efficient in absorbing the evancescent energy and keeping the same performance for propagating modes.This good behavior of MPML is improtant in our analysis.Compared to isolated microstrip antenna,more slow decay evancescent waves are included near nicrostrip antenna array.It is shown that the MPML results are more accurate than the PML ones
出处
《电子学报》
EI
CAS
CSCD
北大核心
1998年第3期5-9,共5页
Acta Electronica Sinica
基金
国家自然科学基金
关键词
微带天线阵
时域有限差分法
吸收边界条件
Microstrip array antenna,Finite difference-time domain,Absorbing boundary condition
