基于共面波导馈电的三频单极子天线  

Tri-Band Monopole Antenna Based on CPW-Feed

作　　者：杨敏[1] 陈新伟[1] 张文梅[1] 

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《测试技术学报》2015年第3期195-199,共5页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(61271160;61172045;61178013);山西省回国留学人员资助项目(2012-014);教育部高校博士点基金资助项目(20121401110009)

摘　　要：本文提出了一种新型的三频单极子天线,该天线用共面波导(CPW)馈电,由两个不同长度和结构的单极子构成,长单极子结构实现谐振频率1.57GHz和3.5GHz,短单极子结构实现谐振频率2.4GHz.同时,通过在左侧接地面上增加一个正方形贴片,改善了三个频段内的峰值增益.所实现的天线尺寸为59mm×40.55mm×1.6 mm,在三个工作频率上的带宽分别为254 MHz(1.518 GHz^1.772 GHz)、461 MHz(2.289GHz^2.75 GHz)和226 MHz(3.514 GHz^3.714 GHz),覆盖了GPS、无线局域网(WLAN)和无线接入系统等频段,增益分别为2.15dBi,3.12dBi和3.86dBi.In this paper,a novel compact monopole antenna fed by a coplanar waveguide （CPW）for tri-band applications is presented.It comprises two different monopoles and can operate at three resonant frequencies of 1.57 GHz,2.4 GHz and 3.5 GHz.The resonant frequency 1.57 GHz and 3.5 GHz are controlled mainly by the longer monopole and 2.4 GHz is mainly decided by the shorter monopole.In order to improve the gain of the antenna,a rectangular patch is added on the left side of the ground plane.The realized antenna has a total size of 59 mm×40.55 mm×1.6 mm.The bandwidth at three frequencies are 254 MHz （1.518 GHz～1.772 GHz）,461 MHz （2.289 GHz～2.75 GHz）and 226 MHz （3.514 GHz～3.714 GHz）respectively,covering the band for GPS,WLAN and wireless ac-cess system.The gains are 2.15 dBi,3.12 dBi and 3.86 dBi respectively.

关 键 词：共面波导馈电 单极子天线 三频 矩形贴片 

分 类 号：TN821.3[电子电信—信息与通信工程]