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A novel broadband patch antenna for universal UHF RFID tags
Author(s) -
Huang Jun Zh.,
Yang Peng H.,
Chew Weng Cho,
Ye Terry Tao
Publication year - 2010
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.25560
Subject(s) - ultra high frequency , broadband , bandwidth (computing) , electrical engineering , antenna tuner , impedance matching , microwave , microstrip antenna , electrical impedance , antenna (radio) , electronic engineering , engineering , patch antenna , physics , telecommunications , antenna factor
A compact broadband patch antenna is proposed in this paper for global ultra‐high‐frequency (UHF) RF identification (RFID) applications. The antenna is composed of four synchronous shorted patches that resonate at four different frequencies, broadening its impedance bandwidth. A central loop is incorporated to feed the four patches simultaneously, which provides the required input reactance for matching to the chip as well. Since the current of neighboring patch is vertical to each other that they can radiate well without canceling each other, the gain is stable over the whole frequency band. Prototype is fabricated and tested, which shows that the impedance bandwidth can cover the whole UHF RFID band (840 MHz – 960 MHz), and the read range is over 3 meters when EIRP is set to 30 dBm at the reader. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2653–2657, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25560