摘要
准八木(Quasi-Yagi)天线是一种基于传统八木天线的宽带平面微带天线,具有良好的增益特性。为了实现超宽带系统的远距离通信,该天线在准八木天线基础上增加了引向器,从而在对天线剖面影响较小的前提下提高了天线单元的增益。利用宽带馈电网络组阵,使天线阵列具有良好的阻抗匹配性能,显著提高了天线的辐射效率。仿真和测试结果均表明:准八木天线有效地实现了超宽带、小型化、高增益,并且在水平方向上天线的能量辐射范围比较大,而在垂直方向上能量辐射相对集中,从而在远距离地面通信中有效增加了辐射能量的利用率,可以实现定向远距离地面宽带通信。
The Quasi-Yagi antenna,based on the classic Yagi-Uda dipole array,is a broadband planar microtrip antenna with relatively high gain.In order to obtain long-distance communications in ultra-wideband（UWB） systems,the antenna gain was enhanced by adding a director based on the Quasi-Yagi antenna with a little effect on the size of the antenna.Through grouping an array by a broadband feeding network,a good impedance matching was achieved,and the efficiency of the antenna radiation was significantly improved.Simulation and measured results showed that the antenna has effectively obtained ultra-wideband,miniaturization,high-gain,and could radiate energy in the horizontal direction with a great range,while a quite concentrated radiation was obtained in the vertical direction to obtain the directional long-distance terrestrial broadband communications effectively.
出处
《桂林电子科技大学学报》
2010年第2期97-100,共4页
Journal of Guilin University of Electronic Technology
基金
广西研究生教育创新计划项目(2008105950809M410)
关键词
准八木
超宽带
阵列
高增益
远距离通信
Quasi-Yagi
ultra-wideband
array
high gain
long-distance communications
