Title :
Dual-Printed-Dipoles Reader Antenna for UHF Near-Field RFID Applications
Author :
Li, Xiuping ; Yang, Zijiang
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
fDate :
7/3/1905 12:00:00 AM
Abstract :
In this letter, a dual-printed-dipoles reader antenna is proposed for ultrahigh frequency (UHF) near-field radio frequency identification (RFID) applications. The two printed dipoles compose a loop to provide in-phase current performance. A small dimension of 80 × 70 × 30 mm3 is demonstrated for special small-size and pure near-field industry application requirement. The measured reading range is 37 mm (with Impinj UHF button) without reading nulls. The measured bandwidth is 220 MHz (750-970 MHz) under the condition of voltage standing wave ratio (VSWR) less than 1.5, which covers the Europe and FFC standards and agrees well with the simulated results. In addition, the antenna has a low far-field gain less than -20 dBi, which can be applied in pure near-field RFID systems.
Keywords :
UHF antennas; dipole antennas; microstrip antennas; radiofrequency identification; Europe standard; FFC standard; UHF near-field RFID application; bandwidth 220 MHz; bandwidth 750 MHz to 970 MHz; dual-printed-dipole reader antenna; in-phase current performance; ultrahigh frequency near-field radio frequency identification; voltage standing wave ratio; Antenna measurements; Dipole antennas; Microwave antennas; Radiofrequency identification; UHF antennas; UHF measurements; Dual printed dipoles; near-field antenna; ultrahigh frequency (UHF);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2121050
