Open AccessA Compact RFID Reader Antenna for UHF Near-Field and Far-Field Operations
Author(s) -
Lai Xiao zheng,
ZeMing Xie,
Xuan-Liang Cen
Publication year - 2013
Publication title -
international journal of antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.282
H-Index - 37
eISSN - 1687-5877
pISSN - 1687-5869
DOI - 10.1155/2013/961042
Subject(s) - ultra high frequency , near and far field , loop antenna , electrical engineering , antenna (radio) , radiation pattern , radio frequency identification , acoustics , antenna measurement , physics , engineering , antenna factor , optics , computer science , computer security
A compact loop antenna is presented for mobile ultrahigh frequency (UHF) radio frequency identification (RFID) application. This antenna, printed on a 0.8 mm thick FR4 substrate with a small size of 31 mm × 31 mm, achieves good impedance bandwidth from 897 to 928 MHz, which covers USA RFID Band (902–928 MHz). The proposed loop configuration, with a split-ring resonator (SRR) coupled inside it, demonstrates strong and uniform magnetic field distribution in the near-field antenna region. Its linearly polarized radiation pattern provides available far-field gain. Finally, the reading capabilities of antenna are up to 56 mm for near-field and 1.05 m for far-field UHF RFID operations, respectively
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