Title :
Novel Broadband Center-Fed UHF Near-Field RFID Reader Antenna
Author :
Xiao-Dong Wei ; Hong-Lin Zhang ; Bin-Jie Hu
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
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.
Keywords :
UHF antennas; antenna feeds; broadband antennas; dipole antennas; impedance matching; magnetic fields; radiofrequency identification; bandwidth 236 MHz; bandwidth 814 MHz to 1050 MHz; broadband center-fed UHF near-field RFID reader antenna; distance 210 mm; impedance matching; magnetic field distribution; multitag detection; near-field radio frequency identification; size 135 mm; tapered double-side parallel stripline-fed dipoles; Antenna measurements; Bandwidth; Broadband antennas; Dipole antennas; Radiofrequency identification; UHF antennas; Near-field; ratio frequency identification (RFID) reader antenna; tapered double-side parallel-stripline (TDSPSL); ultra-high frequency (UHF) antenna;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2377294
