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A Dual-Band Circularly Polarized Hexagonal Ring Antenna for Handheld RFID Readers

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Abstract

In this paper, a compact, lightweight, low-profile dual-band circularly polarized antenna is presented for handheld radio frequency identification (RFID) readers. The proposed antenna consists of two concentric hexagonal rings and a feed network printed on different layers of the dielectric substrate. The antenna configuration exploits a stacked-coupled technique for gain enhancement and single-port feeding for easy manufacturing. The center frequencies of the two resonating bands are 0.92 GHz (UHF) and 2.45 GHz (ISM). The antenna exhibits circular polarization characteristics in both the resonating bands, therefore encountering the losses due to polarization mismatch and increasing the tag detection reliability. A prototype of the proposed RFID antenna is simulated and fabricated, and experimental results are in close agreement. The peak antenna gain is 3.3 dB and 5 dB in the UHF and ISM bands, respectively. The overall size of the RFID antenna is 80 mm × 80 mm × 7.76 mm.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Faculty of Technology, University of Delhi, New Delhi, 110078, India

    Chandni Bajaj

  2. Department of Electronics and Communication Engineering, Netaji Subhas University of Technology, New Delhi, 110078, India

    Dharmendra Kumar Upadhyay

  3. Department of Electronics and Communication Engineering, SRM Institute of Science and Technology, Kattankulathur, 603203, India

    Sachin Kumar

  4. School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, 110067, India

    Binod Kumar Kanaujia

  5. Department of Electronics and Communication Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, 144027, India

    Binod Kumar Kanaujia

Authors
  1. Chandni Bajaj
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  2. Dharmendra Kumar Upadhyay
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  3. Sachin Kumar
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  4. Binod Kumar Kanaujia
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Correspondence to Sachin Kumar.

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Bajaj, C., Upadhyay, D.K., Kumar, S. et al. A Dual-Band Circularly Polarized Hexagonal Ring Antenna for Handheld RFID Readers. Wireless Pers Commun 125, 3101–3115 (2022). https://doi.org/10.1007/s11277-022-09700-3

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  • DOI: https://doi.org/10.1007/s11277-022-09700-3

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