射频识别标签用非对称缝隙天线设计  

Design of Dissymmetrical Slot Antenna for RFID Tag

作　　者：周永明[1] 赖晓铮[2] 赖声礼[2] 

机构地区：[1]韶关学院电子工程系,韶关512005 [2]华南理工大学电子与信息学院,广州510640

出　　处：《微波学报》2009年第3期39-42,共4页Journal of Microwaves

基　　金：珠海市科技攻关项目(PC20032001);韶关市技术创新项目(韶科2007-01)

摘　　要：为寻找射频识别标签用缝隙天线新结构,提高标签芯片与缝隙天线的匹配性能,提出了射频识别标签用非对称缝隙天线.研究了非对称直缝隙天线和非对称弯折缝隙天线的阻抗随缝隙的长度和弯折角度的变化规律.在天线尺寸相同的情况下,将标签用非对称直缝隙天线与对称直缝隙天线进行比较,发现非对称直缝隙天线更易于与标签芯片匹配.尝试将非对称缝隙天线与Ph ilips公司提供的标签测试芯片进行匹配,制作了相应的实物天线,仿真与测试结果说明所设计的天线满足RFID标签应用要求。To search the new type of the slot antenna for RFID （ Radio frequency identification） tag and to improve the performance of the matching between tag chip and slot antenna, this paper presents a dissymmetrical slot antenna for RFID tag at 915MHz band. The attributes of impedance of the slot antenna along with its length and folded angle have been investigated. After comparison of impedances between dissymmetrical and symmetrical slot antennas both with the same size, it is found that the impedance matching of the dissymmetrical slot antenna with tag chip is easier than that of symmetrical slot antenna. The presented slot antenna has been matched with the testing chip of Philips＇Company. A reciprocal slot antenna for the tag has been fabricated. Both simulated and measured results show that the designed antenna is satisfied with RFID application.

关 键 词：射频识别 标签天线 非对称缝隙天线 阻抗特性 匹配设计 

分 类 号：TN823[电子电信—信息与通信工程]