Novel Broadband Center-Fed UHF Near-Field RFID Reader Antenna

A broadband center-fed ultra-high frequency (UHF) near-field radio frequency identification (RFID) reader antenna is proposed and investigated in this letter. The design utilizes four tapered double-side parallel stripline (TDSPSL)-fed dipoles to form a circular loop to achieve broadband impedance matching and strong and uniform magnetic field distribution. Parametric studies are carried out to characterize the design concept. The proposed antenna was fabricated and measured. The measured 10-dB impedance bandwidth is 236 MHz (814-1050 MHz), which covers the entire UHF RFID frequency band. The maximum reading distance is 210 mm at 30 dBm input power. Moreover the antenna can achieve a 100% read percentage within the height of 135 mm for multitag detection. The measured results agree well with the simulated ones.

[1]  Xianming Qing,et al.  Electrically Large Dual-Loop Antenna for UHF Near-Field RFID Reader , 2013 .

[2]  J. Cascon,et al.  A Reconfigurable Passive UHF Reader Loop Antenna for Near-Field and Far-Field RFID Applications , 2012, IEEE Antennas and Wireless Propagation Letters.

[3]  Xiuping Li,et al.  Dual-Printed-Dipoles Reader Antenna for UHF Near-Field RFID Applications , 2011, IEEE Antennas and Wireless Propagation Letters.

[4]  Yong Yuan,et al.  A Robust UHF Near-Field RFID Reader Antenna , 2012, IEEE Transactions on Antennas and Propagation.

[5]  Xianming Qing,et al.  Electrically Large Zero-Phase-Shift Line Grid-Array UHF Near-Field RFID Reader Antenna , 2014, IEEE Transactions on Antennas and Propagation.

[6]  Alice Buffi,et al.  Meandered TWAS array for near-field UHF RFID applications , 2014 .

[7]  Bin-Jie Hu,et al.  Novel UHF Near-Field RFID Reader Antenna Based on Double-Sided Parallel-Strip Line , 2014, IEEE Antennas and Wireless Propagation Letters.

[8]  Malathi Kanagasabai,et al.  A Novel Fractal Antenna for UHF Near-Field RFID Readers , 2013, IEEE Antennas and Wireless Propagation Letters.

[9]  Hosung Choo,et al.  Planar Near-Field RFID Reader Antenna for Item-Level Tagging , 2011, IEEE Antennas and Wireless Propagation Letters.

[10]  Xianming Qing,et al.  A Broadband UHF Near-Field RFID Antenna , 2010, IEEE Transactions on Antennas and Propagation.

[11]  Ananda Sanagavarapu Mohan,et al.  Novel Bridge-Loop Reader for Positioning With HF RFID Under Sparse Tag Grid , 2014, IEEE Transactions on Industrial Electronics.

[12]  Yanjun Zuo.  Survivable RFID Systems: Issues, Challenges, and Techniques , 2010, IEEE Transactions on Systems, Man, and Cybernetics, Part C (Applications and Reviews).

[13]  Luca Catarinucci,et al.  Smart RFID Antenna System for Indoor Tracking and Behavior Analysis of Small Animals in Colony Cages , 2014, IEEE Sensors Journal.

[14]  Q. Wu,et al.  A Novel Magnetic Coupling UHF Near Field RFID Reader Antenna Based on Multilayer-Printed-Dipoles Array , 2014, IEEE Transactions on Magnetics.

[15]  Xiuping Li,et al.  Microstrip-based segmented coupling reader antenna for near-field UHF RFID applications , 2011 .

[16]  A. Michel,et al.  A modular antenna for UHF RFID near-field desktop reader , 2014, 2014 IEEE RFID Technology and Applications Conference (RFID-TA).