一种小型化RFID标签天线的仿真设计  

Design and Simulation of a Minimized RFID Tag Antenna

作　　者：汤伟[1] 林斌[1] 周建华[1] 游佰强[1] 

机构地区：[1]厦门大学信息科学与技术学院电子工程系,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2008年第1期50-54,共5页Journal of Xiamen University：Natural Science

基　　金：福建省自然科学基金(A0510001);福建省重点科技项目(2007H0036)资助

摘　　要：针对射频识别(RFID)标签天线小型化的实际需求,设计了一种折叠印刷偶极子天线结构,采用镜像补偿技术改善了天线的辐射特性.从实际制作的角度详细研究了天线的介电常数和结构尺寸等参数变化对其特性参数的影响,如中心频率、S11特性、一定条件下的绝对带宽和相对带宽等.在此基础上给出了可工作于915 MHz的小型化天线,具有较好的S11特性和方向性.当驻波比小于2时,天线的工作带宽达到88 MHz,其相对带宽为9.6%.设计的天线尺寸约为30mm×44 mm,小于国内外文献中所提到的天线尺寸.For the minimization requirement of radio frequency identification （RFID） tag antenna,we designed a folded printed di- pole antenna and introduced the mirror compensation technology to improve the radiation feature of antenna. Considering engineering processes, we particularly studied the influence of dielectric constant εr, structure dimensions and other parameters on the characteristic parameters of antenna,such as resonance frequency,S11 ,absolute bandwidth and relative bandwidth under some condition. On the above basis,we proposed a 915 MHz minimized antenna with better S11 and direction characteristics. When Vertical Standing Wave Ratio （VSWR） is less than 2 ,the antenna bandwidth is up to 88 MHz absolutely and 9.6 % relatively. The designed structure dimension is about 30 mm × 40 mm,which is smaller than the one＇s proposed in references at home and abroad.

关 键 词：射频识别 标签天线 印刷偶极子天线 小型化 

分 类 号：TN820.11[电子电信—信息与通信工程]