Low-cost mechanism to reconfigure the operating frequency band of a Vivaldi antenna for cognitive radio and spectrum monitoring applications

被引：8
作者：
Borda-Fortuny, Cristina [1 ,2 ]
Tong, Kin-Fai [1 ]
Chetty, Kevin [2 ]
机构：
[1] UCL, Dept Elect & Elect Engn, London, England
[2] UCL, Dept Secur & Crime Sci, London, England
来源：
IET MICROWAVES ANTENNAS & PROPAGATION | 2018年 / 12卷 / 05期
关键词：
cognitive radio; Vivaldi antennas; operating frequency band; spectrum monitoring applications; frequency agile Vivaldi antenna; radiofrequency switch; wideband multiband antennas;
D O I：
10.1049/iet-map.2017.0731
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：
A frequency agile Vivaldi antenna whose operating frequency band can be switched between two selected bands is proposed in this study for spectrum monitoring and cognitive radio applications. A radiofrequency (RF) switch is introduced into the back-slot of a Vivaldi antenna to allow switching of the operational band. The realised gains of the antenna are 10.5dBi in the low band around 3.1GHz, and 12dBi in high band around 4.1GHz. The radiation pattern is stable and its direction is consistent across the two bands. This design can be applied to multiple reconfigurable bands by using more RF switches to tune the desired operating frequency. A set of reliable design equations has been provided as well. This reconfigurable antenna offers improved gain and isolation over multiple, wideband and multiband antennas without increasing the cost and size when compared with those designs reported.
引用
收藏
页码：779 / 782
页数：4
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