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Near-field antenna for a radio frequency identification shelf in the UHF band

Near-field antenna for a radio frequency identification shelf in the UHF band

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This study presents the design of a near-field reader and tag antenna in the ultra high frequency (UHF) band that can be used for various radio frequency identification (RFID) shelves. The tag antenna is designed by introducing an ‘S’-shaped slot into the circular patch, and the reader antenna is a rectangular slot array fed by microstrip lines. These UHF antennas operating in the near-field are more reliable in many RFID applications where the reading distance is not the major factor. The electric coupling concept between the reader and tag antenna is employed for near-field communication.

Inspec keywords: slot antenna arrays; UHF antennas; radiofrequency identification; antenna feeds; microstrip lines

Other keywords: radio frequency identification shelves; ultra high frequency band; near-field antenna; rectangular slot array; S-shaped slot; reader antenna; near-field reader; microstrip lines

Subjects: Waveguides and microwave transmission lines; Antenna accessories; Antenna arrays; Other radio links

References

    1. 1)
      • G. Marrocco . RFID antennas for the UHF remote monitoring of human subjects. IEEE Trans. Antennas Propag. , 6 , 1862 - 1870
    2. 2)
      • http://www.alientechnology.com, accessed August 2008.
    3. 3)
      • W. Choi , J.S. Kim , J.H. Bae . RFID tag antenna coupled by shorted microstrip line for metallic surfaces. ETRI J. , 4 , 597 - 599
    4. 4)
      • Nikitin, P.V., Rao, K.V., Lazar, S.: `An overview of near field UHF RFID', IEEE Int. Conf. RFID, March 2007, p. 167–174.
    5. 5)
      • Choi, W., Kim, J.S., Bae, J.H.: `Small RFID tag antenna for metallic surface', Proc. APMC, December 2008, Hong Kong.
    6. 6)
      • Arumugam, D.D., Engels, D.W.: `Characteristics of passive UHF RFID tags on liquids', IEEE AP-S Int. Symp., June 2009, p. 1–4.
    7. 7)
    8. 8)
      • Choo, J., Ryoo, J., Park, I.: `A novel multi-loop tag for near field communication in UHF band', Proc. Asia-Pacific Microw. Conf., December 2007, p. 1–4.
    9. 9)
      • H.G. Akhaven , D. Mirshekar-Syahkal . Approximate model for microstrip fed slot antennas. Electron. Lett. , 23 , 1902 - 1903
    10. 10)
      • http://www.rfid.averydennison.com, accessed August 2008.
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