Frequency Tunable Antenna with Zeroth Order Resonator for UHF Near-field RFID Systems
This paper presents a frequency tunable antenna with epsilon negative(ENG)zeroth order resonator(ZOR)for ultra-high frequency(UHF)near-field radio frequency identification(RFID)systems.The ENG ZOR unit cell is composed of a toroidal inductor,a metal pin,a variable capacitor and an additional ground plane.The additional ground and the variable capacitor affect the shunt right-handed capacitance of the ENG ZOR unit cell.The measured resonant frequency of the antenna can be swept from 846MHz to 1039MHz by changing the capacitance of the variable capacitor.The measured maximum reading distance is 85mm at30dBm input power.And the minimum input power for successful detecting of the near-field tagis-12dBm,which is much lower than the conventional UHF near-field RFID reader antennas.The proposed antenna is suitable for UHF near-field RFID systems.
Xiao-Dong Wei Hong-Lin Zhang Bin-Jie Hu
School of Electronic and Information Engineering South China University of Technology,Guangzhou,China
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
477-481
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）