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

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

239

Lastpage

242

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);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2121050

Filename

5721783