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Design of an efficient ambient WiFi energy harvesting system

Design of an efficient ambient WiFi energy harvesting system

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This study is focused on equipping wireless devices (including sensors) with novel, high-efficiency circuitry to harvest and convert ambient radio frequency (RF) power to direct current (dc). Key components of this technology are (a) miniaturised antenna and (b) high-efficiency rectifying circuit. The first is responsible for capturing the RF waves, and the latter converts the RF energy to dc. A major challenge is the design of novel circuitry to generate a battery-like voltage from very low incoming RF energy. Under this study, the authors designed a novel RF power harvesting front-end whose conversion efficiency is significantly improved at low RF power levels (<−20 dBm) as compared to existing technologies. Thus, the new circuitry can harvest ambient and widely available RF energy, making a game changing technology for powering mobile devices. In this study, the authors demonstrate this technology by using it to power a commercially available temperature and humidity meter with an LCD display. The latter is powered using nothing more than ambient WiFi signals in an office environment.

References

    1. 1)
    2. 2)
    3. 3)
      • J. Rebello . (2010) Global wireless subscriptions reach 5 billion.
    4. 4)
      • Yearbook of statistics chronological time series.
    5. 5)
      • Cheng, Y.-C., Chawathe, Y., LaMarca, A., Krumm, J.: `Accuracy characterization for metropolitan-scale Wi-Fi localization', Proc. Third Int. Conf. on Mobile Systems, January 2005, p. 233–245.
    6. 6)
    7. 7)
      • Sample, A., Smith, J.: `Experimental results with two wireless power transfer systems', Proc. IEEE RWS, January 2009, p. 16–18.
    8. 8)
      • H. Ostaffe . (2010) Power out of thin air: ambient RF energy harvesting for wireless sensors.
    9. 9)
      • IEEE 802.11: ‘Wireless LAN medium access control (MAC) and physical layer (PHY) specifications’ (IEEE-SA, 2007). doi:10.1109/IEEESTD.2007.373646.
    10. 10)
      • Federal Communications Commission: ‘Code of federal regulations’. Title 47, Chapter 1, Part 15, Radio frequency devices, Section 15.247.
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
      • J.L. Volakis , C.-C. Chen , K. Fujimoto . (2010) Small antennas: miniaturization techniques and applications.
    16. 16)
    17. 17)
    18. 18)
    19. 19)
    20. 20)
      • Powercast Corporation. P2110: www.powercastco.com/PDF/P2110-datasheet.pdf.
    21. 21)
    22. 22)
    23. 23)
      • Austria Microsystems Inc.: AS1310-BTDT-18. http://www.austriamicrosystems.com/Products/Power-Management/DC-DC-Step-up-Converters/AS1310.
    24. 24)
      • Seiko Instruments Inc.: S882Z-MP005-A.
    25. 25)
      • Radio Shack Cat. No. 63–334.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-map.2012.0129
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