›› 2013, Vol. 26 ›› Issue (12): 47-.

• 论文 • 上一篇    下一篇

一种RFID小型圆极化四臂螺旋天线

王永强,雷振亚,李磊,陈雷   

  1. (西安电子科技大学 天线与微波技术国防科技重点实验室,陕西 西安 710071)
  • 出版日期:2013-12-15 发布日期:2014-01-10
  • 作者简介:王永强(1987—),男,硕士研究生。研究方向:天线与微波电路设计。E-mail:471757273@qq.com

A Small Circular Polarization Four-arm Spiral RFID Antenna

 WANG Yong-Qiang, LEI Zhen-Ya, LI Lei, CHEN Lei   

  1. (National Laboratory of Antennas and Microwave Technology,Xidian University,Xi'an 710071,China)
  • Online:2013-12-15 Published:2014-01-10

摘要:

设计了一种用于UHF频段射频识别系统的小型右手圆极化四臂螺旋天线。天线由印制在微带介质板的4个长条形臂组成,通过微带功分器馈电。天线在进行4个端口的单独匹配和功分器相连时,需采用一种新的匹配方法。通过仿真优化,天线尺寸为60 mm×60 mm×6 mm,峰值增益为3.8 dB,带内轴比<3 dB,3 dB波束宽度>120°,前后比>15 dB。实物测试结果与仿真结果吻合。

关键词: 射频识别, 四臂螺旋天线, 圆极化, 有源匹配

Abstract:

A compact quadrifilar spiral antenna (QSA) with right-hand circular polarization for UHF band RFID reader is presented.The proposed QSA consists of four long arms printed on substrate and fed by microstrip feed network.A new match method is used when four individual ports are connected to the feed network.The proposed antenna has a size of 60 mm×60 mm×6 mm,the peak gain is 3.5 dB with the axial ratio under 2 dB,the 3 dB beamwidth is more than 120° and the front-to-back ratio is more than 15 dB.The antenna is fabricated and measured,and the results agree well with the simulation.

Key words: RFID;quadrifilar spiral antenna;circular polarization;active match method

中图分类号: 

  • TN823+.31