一种用于WLAN的小型双频宽带印刷单极天线  

A Miniaturized CPW-Fed Dual Band Broad Band Monopole Antenna for WLAN Application

作　　者：宋小弟[1,2] 冯恩信[2] 傅君眉[2] 

机构地区：[1]华东电子工程研究所,合肥230031 [2]西安交通大学电子与信息工程学院,西安710049

出　　处：《微波学报》2009年第6期71-74,共4页Journal of Microwaves

基　　金：总装预研基金项目

摘　　要：设计了一种满足WLAN双频工作所需的小型共面波导馈电的双频宽带印刷单极子天线单元。该单极子天线的设计采用了在倒锥形单极天线顶部添加半圈矩形螺旋枝节的结构，使其获得了小型化和双频宽带的性能。采用基于共面波导的馈电方式，天线单元具备宽带匹配、结构简单、制作方便和易与其它无线通信设备集成等优点。仿真和实测结果表明，设计的天线单元在WLAN应用的高、低频段上10dB阻抗带宽分别约为2100MHz（4．52～6．62GHz，约37．7％）和220MHz（2．27～2．49GHz，约9．2％），增益在2～3dBi之间；在相应工作点辐射波瓣图上全向性较好。该天线能满足WLAN应用所需，具有较高的工程应用价值。In this paper, a miniaturized CPW-fed dual band and broadband printed monopole antenna for WLAN appli- cation is presented. The miniaturized dual band and broadband performance of the proposed monopole is achieved by adding a half helix on a tab-like monopole. Fed by CPW, the monopole obtained some favorable characteristics, such as broadband matched, simple structure, easy to manufacture and integrate with other communication equipment. Simulation and experi- mental results show that the 10rib return loss impedance bandwidths for the higher and lower band are 2100MHz （ about 37.7% ） which covers from 4.52GHz to 6.62GHz and 220MHz （ about 9.2% ） which covers from 2.27GHz to 2.49GHz respectively, and gain of the antenna are all between 2 to 3 dBi. Radiation patterns of the proposed antenna are also suitable for WLAN ap- plications.

关 键 词：无线局域网(WLAN) 共面波导馈电 双频 单极子天线 

分 类 号：TN821.3[电子电信—信息与通信工程]