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Wearable self-tuning antenna for emergency rescue operations

Wearable self-tuning antenna for emergency rescue operations

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In this study, the design, hardware implementation and characterisation of a self-tuning 406 MHz antenna of a Cospas-Sarsat personal locator beacon are presented. The realised prototype is able to perform automatic tuning of the antenna under time-varying environmental conditions due to human body movements and sea water proximity. The impedance tuning is performed by tracking the instantaneous value of the reflection coefficient and by modifying an appropriate impedance matching network according to a real-time adaptive algorithm. A resilient default/backup software architecture has been designed to ensure that tuning guarantees a return loss higher than 10 dB for the personal locator beacon in most of impedance mismatching conditions.

References

    1. 1)
      • 1. ‘International Cospas-Sarsat Programme’ http://www.cospas-sarsat.int/, accessed 17 August 2015.
    2. 2)
      • 2. King, J.V.: ‘Cospas-Sarsat: an international satellite system for search and rescue’, Space Commun., 2002, 18, (3–4), pp. 139150.
    3. 3)
      • 3. Nepa, P., Manara, G.: ‘On the stochastic characterization of wearable antennas’. PIERS 2013 (Progress in Electromagnetics Research Symp.), Stockholm, Sweden, 2013, p. 1.
    4. 4)
    5. 5)
      • 5. Nepa, P., Rogier, H.: ‘Wearable antennas for off-body radio links at VHF and UHF bands (below 1 GHz): challenges, state-of-the-art and future trends’, IEEE Antennas Propag. Mag., 2015, 57, (5).
    6. 6)
    7. 7)
      • 7. Specification for Cospas-Sarsat 406 MHz Distress Beacons, https://www.cospas-sarsat.int/images/stories/SystemDocs/Current/CS-T-001-Oct2014.pdf accessed 17 August 2015.
    8. 8)
      • 8. Lilja, J., Pynttari, V., Kaija, T., et al: ‘Body-worn antennas making a splash: lifejacket-integrated antennas for global search and rescue satellite system’, IEEE Antennas Propag. Mag., 2013, 55, (2), pp. 324341.
    9. 9)
      • 9. Fu, J.-S., Zhu, X.A., Phillips, J.D., et al: ‘A ferroelectric-based impedance tuner for adaptive matching applications’, IEEE MTT-S Int. Microwave Symp. Digest, 2008, 2008, pp. 955958.
    10. 10)
      • 10. Sun, Y., Moritz, J., Zhu, X.: ‘Adaptive impedance matching and antenna tuning for green software-defined and cognitive radio’, IEEE 54th Int. Midwest Symp. on Circuits and Systems (MWSCAS), 2011, August 2011, pp. 14.
    11. 11)
    12. 12)
      • 12. Nabki, F., Deslandes, D.: ‘An agile matching network using phase detection for antenna tuning’, IEEE 20th Int. Conf. Electronics, Circuits, and Systems (ICECS), 2013.
    13. 13)
    14. 14)
    15. 15)
      • 15. Song, H., Oh, S.H., Aberle, J.T., et al: ‘Automatic antenna tuning unit for software-defined and cognitive radio’, IEEE Antennas and Propagation Society Int. Symp., 2007, June 2007, pp. 8588.
    16. 16)
    17. 17)
    18. 18)
      • 18. Sánchez, C., de Mingo, J., Garcia, P., et al: ‘Application of an impedance tuning network for mobile DVB-H terminals’, IEEE 70th Vehicular Technology Conf. Fall (VTC 2009-Fall), 2009, September 2009, pp. 15.
    19. 19)
    20. 20)
      • 20. Chen, Y., Manteuffel, D.: ‘Miniaturizing of a distributed MEMS impedance matching network’. Int. Workshop on Antenna Technology (iWAT), 2013, March 2013, pp. 303306.
    21. 21)
      • 21. Sharma, A.K., Gupta, N.: ‘Impedance matching for RF-MEMS based microstrip patch antenna’. 11th Int. Conf. on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2014, May 2014, pp. 14.
    22. 22)
    23. 23)
      • 23. Sharma, V., Pathak, N.P.: ‘Continuously tunable concurrent dual-frequency impedance matching network’, 7th IEEE Int. Conf. on Industrial and Information Systems (ICIIS), 2012, August 2012, pp. 13.
    24. 24)
      • 24. Chen, Y., Martens, R., Valkonen, R., et al: ‘A varactor-based tunable matching network for a non-resonant mobile terminal antenna’, 8th European Conf. on Antennas and Propagation (EuCAP), 2014, April 2014, pp. 18771881.
    25. 25)
      • 25. Jang, H., Son, W., Oh, K., et al: ‘High-speed real-time hand effect tuning algorithm in hand-held terminal’, IEEE MTT-S Int. Microwave Workshop Series on Intelligent Radio for Future Personal Terminals (IMWS-IRFPT), 2011, August 2011, pp. 12.
    26. 26)
      • 26. ‘Varicap’ diode datasheet, http://www.onsemi.com/pub_link/Collateral/MMBV105GLT1-D.PDF, accessed 17 August 2015.
    27. 27)
      • 27. Directional Coupler datasheet, http://cdn.macom.com//datasheets/MACP-011013.pdf, accessed 17August 2015.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-map.2015.0315
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