摘要
设计印刷在有限大聚四氟乙烯板上的叶状偶极天线,设计的工作频带是6-8 GHz。应用结合完全匹配层（PML）技术的时域有限差分（FDTD）方法,对天线的阻抗特性和远区辐射场的分布进行了研究。结果表明：在没有任何加载的情况下,与50Ω馈线相连时,在设计的主频带内,其电压驻波比小于1.6,在几个不同频率点的辐射场方向图表现出良好的稳定性。该天线的特性能够满足超宽带的要求,可用于无载波超宽带无线数据通信系统。
A Leaf-like dipole printed on the finite Polytetrafluoroethylene plane with an operating frequency band of 6-8GHz is presented in this paper. The impedance characteristics and radiation field distribution characteristics are studied, by means of the finite difference time domain （FDTD） method combined with the perfect matched layer （PML） technique. Numerical results indicate that, when the 50 g; feeding line is connected,the VSWR value is less than 1.6 in the main frequency band and the radiation pattern shows stable characteristics at several different frequency points. The proposed antenna has a wide-band frequency-domain response, and behaves well in the time domain as well, so this sort of antenna is adequate for the UWB system.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2007年第4期57-59,共3页
Journal of the China Railway Society
基金
国家自然科学基金项目(60471053)
关键词
超宽带
叶状偶极天线
阻抗特性
辐射场方向图
ultra wideband
leaf-like dipole
impedance characteristic
radiation pattern
