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Broadband UHF RFID tag antenna with parasitic patches for metallic objects
Author(s) -
Lai MingYin,
Li RongLin
Publication year - 2011
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.26049
Subject(s) - ultra high frequency , broadband , bandwidth (computing) , microwave , microstrip antenna , electrical engineering , antenna (radio) , optoelectronics , electronic engineering , materials science , telecommunications , engineering
A novel low‐profile broadband UHF RFID tag antenna with two parasitic patches is proposed.The tag antenna's bandwidth can be greatly enhanced by adding parasitic patches which are gap coupled to the driven patch for the excitation of additional resonant modes. The half‐power bandwidth of the proposed antenna covers all the UHF RFID frequency bands, and the power reflection coefficient is lower than −7dB in the UHF RFID frequency bands (840–960 MHz). The proposed antenna can be easily fabricated at low cost by etching at a thin inexpensive FR4 substrate. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26049