一种UHF频段RFID手持读写器天线的设计  

Design of a reader antenna for UHF band RFID

作　　者：杨虹[1] 郭莉[1] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《电子元件与材料》2014年第5期71-74,共4页Electronic Components And Materials

基　　金：重庆市教委科学技术研究基金资助项目(No.KJ100512);重庆市自然科学基金资助项目(No.CSTC 2010BB2412);重庆市大学生创新创业训练计划资助项目(No.201210617010);重庆邮电大学大学生科研训练计划资助项目

摘　　要：通过在辐射贴片和地板上开槽的方法设计了一款适用于UHF频段RFID（radiofrequencyidentification）手持机的小型圆极化天线，并利用有限元仿真软件HFSS13．0对天线的特性进行了仿真验证。结果表明：辐射贴片尺寸为68mm×68mm时，一10dB回波损耗阻抗带宽达49MHz，在895-945MHz驻波比小于2，最大增益可达-0．61dB。与传统阅读器天线相比，在使用相同介质且保证更高增益的前提下天线尺寸缩减了20％，最大增益调高了0．39dB。A compact and circular polarized antenna for UHF band RFID handset reader was designed, and realized by cutting slits in the antenna patch and etching slots on the ground. Numerical simulation was performed for the characteristics of the antenna with the software IqFSS 13.0.The simulation results show that when the size of antenna patch is 68 mmx68 mm, -10 dB return loss impedance bandwidth is 49 MHz, VSWR is less than 2 and the largest gain is -0.61 dB for antenna in 895-945 MHz. Compared with the traditional reader antenna with the same material of the substrate, the improved antenna has a much higher gain, and the size is reduced by 20% and the max gain is raised 0.39 dB.

关 键 词：RFID 读写器天线 小型化 圆极化 超高频 贴片开槽 

分 类 号：TN713[电子电信—电路与系统]