Study of an ultrawideband omnidirectional rolled monopole antenna with trapezoidal cuts

被引：18
|
作者：
Wu, Xuan Hui [1 ]
Kishk, Ahmed A. [1 ]
机构：
[1] Univ Mississippi, Dept Elect Engn, University, MS 38677 USA
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2008年 / 56卷 / 01期
关键词：
monopole; omnidirectional antenna; ultrawideband (UWB);
D O I：
10.1109/TAP.2007.913174
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An ultrawideband (UWB) omnidirectional monopole antenna is presented. It is shaped by symmetrically wrapping a PEC sheet that has two trapezoidal cuts at the bottom corners. The antenna features about 132% impedance bandwidth and a stable as well as omnidirectional gain versus frequency response over the UWB band. The monopole antenna is investigated both experimentally and numerically by using an FDTD method. A parametric study is carried out for the monopole above an infinite ground plane to obtain an optimal design. The effects of a finite ground plane on both the impedance matching and gain of the antenna are discussed. Particularly, a simple expression is derived based on ground plane size to estimate the ripples appearing in the gain versus frequency response. Furthermore, ground plane edge loading with resistive sheet is proposed to eliminate the edge diffraction effects on the antenna gain, and thus improves the antenna performance.
引用
收藏
页码：259 / 263
页数：5
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