access icon free Planar hexagonal broadband near-field antenna for UHF RFID application

© The Institution of Engineering and Technology
Received 06/09/2019, Accepted 23/07/2020, Revised 18/05/2020, Published 06/08/2020

In the design of ultra-high-frequency (UHF) radio frequency identification (RFID) near-field antennas, realising an antenna with electrically large size, wide frequency band, and far read range has always been a challenge. To solve these problems, a planar hexagonal broadband near-field antenna for UHF RFID applications is proposed and investigated. The antenna structure is composed of six dipoles (resembles three sets of double-arrow structures) that are printed on the top and bottom surfaces of an FR4 substrate, forming a dual-layer (inner and outer layers) broken hexagonal loop. The 10 dB return loss bandwidth of the proposed antenna can reach up to 20.8% (856–1055 MHz), thus able to cover the entire European Telecommunication Standards Institute and Federal Communication Commission system operating bands. Since the current distribution along the loop is kept in a single direction and the length of each dipole is ∼1/2 wavelength (λ), strong and uniform z-component magnetic field distribution with an 18 cm read range can be obtained in the near-field zone of the antenna. As the proposed near-field antenna has a planar size of 175 mm × 175 mm, it is suitable for multi-system and wide-range RFID applications.

Inspec keywords: magnetic fields; microstrip antennas; radiofrequency identification; UHF antennas; broadband antennas; planar antennas

Other keywords: ultra-high-frequency radiofrequency identification near-field antennas; near-field zone; planar hexagonal broadband near-field antenna; wide frequency band; planar size; antenna structure; UHF RFID application; current distribution; frequency 856.0 MHz to 1055.0 MHz; Federal Communication Commission system; magnetic field distribution; European Telecommunication Standards Institute

Subjects: RFID systems; Single antennas

References

    1. 1)
      • 11. Cho, C., Ryoo, J., Park, I., et al: ‘Design of a novel ultra-high frequency radio-frequency identification reader antenna for near-field communications using oppositely directed currents’, IET Microw. Antennas Propag., 2010, 4, (10), pp. 1543–1548.
    2. 2)
      • 10. Wei, X., Zhang, H., Hu, B.: ‘Novel broadband center-fed UHF near field RFID reader antenna’, IEEE Antennas Wirel. Propag. Lett., 2015, 14, pp. 703–706.
    3. 3)
      • 1. Want, R.: ‘An introduction to RFID technology’, IEEE Pervasive Comput., 2006, 5, (1), pp. 25–33.
    4. 4)
      • 16. Xing, Z., Li, H., Wang, L.: ‘Study of tri-dipole broadband RFID near field antenna’. 2017 Int. Applied Computational Electromagnetics Society Symp. (ACES2017), Suzhou, China, August 2017, pp. 1–2.
    5. 5)
      • 2. Pakkathillam, J., Kanagasabai, M.: ‘A novel UHF near-field RFID reader antenna deploying CSRR elements’, IEEE Trans. Antennas Propag., 2017, 65, (4), pp. 2047–2050.
    6. 6)
      • 3. Yao, Y., Liang, Y., Yu, J., et al: ‘A broadband near-field UHF RFID reader antenna with low far-field gain’, IEEE Trans. Antennas Propag., 2017, 65, (9), pp. 4869–4874.
    7. 7)
      • 13. Shen, L., Xiang, H., Tang, W., et al: ‘An end-fire dipole array for big interrogation zone of near-field RFID’. 2015 IEEE Int. Symp. on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Vancouver, Canada, July 2015, pp. 1582–1583.
    8. 8)
      • 9. Qing, X., Goh, C.K., Chen, Z.N.: ‘A broadband UHF near-field RFID antenna’, IEEE Trans. Antennas Propag., 2010, 58, (12), pp. 3829–3838.
    9. 9)
      • 7. Chen, Z.N., Goh, C.K., Qing, X.: ‘Loop antenna for UHF near-field RFID reader’. 2010 Proc. Fourth European Conf. on. Antennas and Propagation (EuCAP), Barcelona, Spain, April 2010, pp. 1–4.
    10. 10)
      • 17. Shi, J., Qing, X., Chen, Z.N., et al: ‘Electrically large dual-loop antenna for UHF near-field RFID reader’, IEEE Trans. Antennas Propag., 2013, 61, (3), pp. 1019–1025.
    11. 11)
      • 4. Cole, P.H., Jamali, B., Ranasinghe, D.C.: ‘Coupling relations in RFID systems’. Auto-ID Center white paper, 2003.
    12. 12)
      • 5. Cho, C., Lee, C., Ryoo, J., et al: ‘Planar near-field RFID reader antenna for item-level tagging’, IEEE Antennas Wirel. Propag. Lett., 2011, 10, pp. 1100–1103.
    13. 13)
      • 19. Wei, X.-D., Hu, B.-J., Zhang, H.-L.: ‘Novel UHF near-field RFID reader antenna based on double-sided parallel-strip line’, IEEE Antennas Wirel. Propag. Lett., 2014, 13, pp. 419–422.
    14. 14)
      • 12. Ding, X., Wu, Q., Zhang, K., et al: ‘A magnetic coupling dipole for UHF near-field RFID reader’, IEEE Trans. Magn., 2012, 48, (11), pp. 4305–4308.
    15. 15)
      • 18. Xing, Z., Wang, L., Wu, C., et al: ‘Study of broadband near-field antenna for ultra-high-frequency radio frequency identification applications’, IET Microw. Antennas Propag., 2011, 5, (14), pp. 1661–1669.
    16. 16)
      • 6. Dobkin, D.M., Weigand, S.M., Iyer, N.: ‘Segmented magnetic antennas for near-field UHF RFID’, Microw. J., 2007, 50, (6), pp. 1–7.
    17. 17)
      • 8. Li, X., Liao, J., Yuan, Y., et al: ‘Segmented coupling eye-shape UHF band near field antenna design’. Asia Pacific Microwave Conf., APMC 2009, Singapore, December 2009, pp. 2401–2404.
    18. 18)
      • 14. Ren, A., Wu, C., Gao, Y., et al: ‘A robust UHF near-field RFID reader antenna’, IEEE Trans. Antennas Propag., 2012, 60, (4), pp. 1690–1697.
    19. 19)
      • 15. Buffi, A., Michel, A., Nepa, P., et al: ‘Meandered TWAS array for near-field UHF RFID applications’, Electron. Lett., 2014, 50, (1), pp. 17–18.
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