一种低旁瓣双圆极化RFID阵列天线的设计  

Design of a Low Side Lobe Dual Circularly Polarized RFID Array Antenna

作　　者：董进 于正永 姜严 DONG Jin;YU Zhengyong;JIANG Yan(School of Computer and Communication,Jiangsu Vocational College of Electronics and Information,Huai’an 223003,China;School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]江苏电子信息职业学院计算机与通信学院,江苏淮安223003 [2]南京师范大学物理科学与技术学院,江苏南京210023

出　　处：《无线电工程》2022年第6期1025-1030,共6页Radio Engineering

基　　金：江苏省产学研合作项目(BY2022365);江苏高校“青蓝工程”资助(中青年学术带头人);射频集成电路与系统创新团队(JSEIYC2020002);江苏省“333工程”科研资助项目(BRA2018315)。

摘　　要：设计了一种适用于超高频(Ultra High Frequency,UHF)频段射频识别(Radio Frequency Identification,RFID)系统的圆极化阵列天线。天线单元使用印刷电路板(PCB)形式的四臂螺旋天线以减小天线阵的尺寸,通过控制4个螺旋臂的激励端口的相位来实现左旋或者右旋圆极化,采用幅度呈二项式分布的激励源对天线单元馈电以有效地抑制旁瓣。实测结果表明,该阵列天线在920~925 MHz频段范围内电压驻波比(VSWR)小于1.37,右旋和左旋的圆极化轴比小于2 dB,增益大于5 dB,旁瓣抑制大于16 dB,这些性能较好地满足RFID应用系统对天线的要求。A circularly polarized array antenna is proposed for Ultra High Frequency(UHF)band radio frequency identification(RFID)system.Four-arm spiral antenna in the form of printed circuit board(PCB)is used to reduce the size of the antenna array.The left or right-hand circular polarization is achieved by controlling the phase of the excitation port of the four spiral arms.The excitation signal with amplitude which shows binomial distribution is used to feed the antenna unit to suppress the side lobe.The experimental results show that the array antenna could work at 920~925 MHz.The Voltage Standing Wave Ratios(VSWR)are less than 1.37.The right and left-hand circular polarization axis ratios and gains are less than 2 dB and larger than 5 dB respectively.The side lobe suppression is greater than 16 dB.The above-mentioned performance parameters show the proposed antenna is suitable for RFID application system.

关 键 词：四臂螺旋天线 双圆极化 低旁瓣 射频识别 

分 类 号：TN822[电子电信—信息与通信工程] TP391.44[自动化与计算机技术—计算机应用技术]