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Design, realisation and evaluation of a liquid hollow torso phantom appropriate for wearable antenna assessment

Design, realisation and evaluation of a liquid hollow torso phantom appropriate for wearable antenna assessment

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This study examines the design, realisation and evaluation of a lightweight and low cost hollow oval cross-section torso phantom appropriate for wearable antenna performance assessment. The phantom consists of an empty inner space (hollow) surrounded by a shell with double plastic walls between which there is a tissue simulating liquid. The phantom's plastic shell is made of a low loss cast acrylic and the liquid is a commercially available one with properties calibrated for the frequency range of 2–6 GHz. The proposed phantom is compared, through simulations, with a full liquid torso phantom and a heterogeneous anthropomorphic voxel phantom. In addition, the fabricated phantom is compared with human bodies and a homogeneous anthropomorphic solid phantom, through measurements. The phantom performance is tested in terms of electric field distribution of a wearable antenna on its surface and the path loss between two wearable antennas, on either side of the phantom. It is proved that the hollow phantom performance approximates the full liquid phantom when an RF absorbing material is placed in the central hollow region. The phantom performance in terms of S 11 wearable antenna measurements is evaluated and found in good agreement with real human bodies in the examined frequency range (2–6 GHz). The far-field wearable antenna performance of the proposed phantom shows deviation in gain <1.5 dB, compared with anthropomorphic phantom.

References

    1. 1)
      • 1. Hertleer, C., Rogier, H., Vallozzi, L., et al: ‘A textile antenna for off-body communication integrated into protective clothing for firefighters’, IEEE Trans. Antennas Propag., 2009, 57, (4), pp. 919925.
    2. 2)
      • 2. Seager, R.D., Chauraya, A., Vardaxoglou, J.C., et al: ‘Towards a compact low frequency woven antenna’. Proc. of the IEEE Antennas and Propagation Society Int. Symp. (APS-URSI), 2009, pp. 14.
    3. 3)
      • 3. Psychoudakis, D., Lee, G., Chen, C., et al: ‘Military UHF body-worn antennas for armored vests’. Proc. of the 4th European Conf. on Antennas and Propagation (EuCAP), 2010, pp. 14.
    4. 4)
      • 4. Zhang, L., Wang, Z., Salman, S., et al: ‘Embroidered textiles for RF electronics and medical sensors’. Proc. of the IEEE Int. Conf. on Wireless Information Technology and Systems (ICWITS), 2012, pp. 14.
    5. 5)
      • 5. Conway, G.A., Scanlon, W.G.: ‘Wearable antennas for medical monitoring systems’. Proc. of the Int. Workshop on Antenna Technology (iWAT), 2015, pp. 10511052.
    6. 6)
      • 6. Kennedy, T.F., Fink, P.W., Chu, A.W., et al: ‘Body-worn E-textile antennas: the good, the low-mass, and the conformal’, IEEE Trans. Antennas Propag., 2009, 57, (4), pp. 910918.
    7. 7)
      • 7. Wang, J.C., Lim, E.G., Leach, M., et al: ‘Review of wearable antennas for WBAN applications’, IAENG Int. J. Comput. Sci., 2016, pp. 1619.
    8. 8)
      • 8. Tsolis, A., Whittow, W.G., Alexandridis, A.A., et al: ‘Embroidery and related manufacturing techniques for wearable antennas: challenges and opportunities’, Electronics, 2014, 3, (2), pp. 314338.
    9. 9)
      • 9. Hall, P.S., Hao, Y.: ‘Antennas and propagation for body-centric wireless communications’ (Artech House, 2012, 2nd edn.).
    10. 10)
      • 10. Tamura, H., Ishikawa, Y., Kobayashi, T., et al: ‘A dry phantom material composed of ceramic and graphite powder’, IEEE Trans. Electromagn. Compat., 1997, 39, (2), pp. 132137.
    11. 11)
      • 11. Kanda, M.Y., Ballen, M., Salins, S., et al: ‘Formulation and characterization of tissue equivalent liquids used for RF densitometry and dosimetry measurements’, IEEE Trans. Microw. Theory Tech., 2004, 52, (8), pp. 20462056.
    12. 12)
      • 12. Marrocco, G.: ‘RFID antennas for the UHF remote monitoring of human subjects’, IEEE Trans. Antennas Propag., 2007, 55, (6), pp. 18621870.
    13. 13)
      • 13. Psychoudakis, D., Chen, C., Volakis, J.L.: ‘Wearable UHF antenna for squad area networks (SAN)’. Proc. of the IEEE Antennas and Propagation Society Int. Symp. (APS-URSI), 2008, pp. 14.
    14. 14)
      • 14. Ogawa, K.: ‘Electromagnetic human phantoms for the purpose of antenna design’. Proc. of the Int. Workshop on Antenna Technology (iWAT), 2011, vol. 2, pp. 190193.
    15. 15)
      • 15. Guy, W.A.: ‘Analyses of electromagnetic fields induced in biological tissues by thermographic studies on equivalent phantom models’, IEEE Trans. Microw. Theory Tech., 1971, 19, (2), pp. 205214.
    16. 16)
      • 16. Ito, K.: ‘Human body phantoms for evaluation of wearable and implantable antennas’. Proc. of the 2nd European Conf. on Antennas and Propagation (EuCAP), 2007, pp. 16.
    17. 17)
      • 17. Loader, B., Loh, T.H.: ‘Phantoms for antenna measurements at 2.4 GHz’. Proc. of the 6th European Conf. on Antennas and Propagation (EuCAP), 2011, pp. 22852288.
    18. 18)
      • 18. Tsolis, A., Whittow, W.G., Alexandridis, A.A., et al: ‘Evaluation of a human body phantom for wearable antenna measurements at the 5. 8 GHz band’. Proc. of the Loughborough Antennas & Propagation Conf., Loughborough, UK, 11–12 November 2013, pp. 414419.
    19. 19)
      • 19. SPEAG, ‘EM-Phantom User Manual V 4. 3. 2015’. Found in http://www.speag.com/, accessed December 2016.
    20. 20)
      • 20. https://indexsar.com/product-category/phantoms/tissue-simulant-fluids-phantoms/fluids-tissue-simulant-fluids-phantoms/’, accessed December 2016.
    21. 21)
      • 21. ‘ETSI, Technical Report: Electromagnetic compatibility and Radio spectrum Matters (ERM); Improvement of radiated methods of measurement (using test sites) and evaluation of the corresponding measurement uncertainties; Part 7: Artificial human beings’, 1998.
    22. 22)
      • 22. Conway, G.A., Scanlon, W.G.: ‘Antennas for over-body-surface communication at 2.45 GHz’, IEEE Trans. Antennas Propag., 2009, 57, (4), pp. 844855.
    23. 23)
      • 23. Krupka, J., Geyer, R.G., Baker, J., et al: ‘Measurements of the complex permittivity of microwave circuit board substrates using split dielectric resonator and reentrant cavity techniques’. Proc. of the Seventh Int. Conf. on Dielectric Materials Measurements & Applications, 23–26 September, 1996, vol. 430, pp. 2124.
    24. 24)
      • 24. Balanis, C.A.: ‘Advanced engineering electromagnetics’ (John Wiley & Sons, 2012, 2nd edn.).
    25. 25)
      • 25. Ogawa, K., Matsuyoshi, T., Iwai, H., et al: ‘A high-precision real human phantom for EM evaluation of handheld terminals in a talk situation’. Proc. of the IEEE Antennas and Propagation Society Int. Symp., 2001, vol. 2, pp. 6871.
    26. 26)
      • 26. Balanis, C.A.: ‘Antenna theory analysis and design’ (John Wiley & Sons, 2005, 3rd edn.).
    27. 27)
      • 27. Paraskevopoulos, A., Alexandridis, A.A., Lazarakis, F., et al: ‘Modelling of dynamic on-body waist-foot channel’. Proc. of the Loughborough Antennas & Propagation Conf. (LAPC), 2013, pp. 155160.
    28. 28)
      • 28. http://www.empire.de/media/pdf/Manual/EMPIRE-Manual-750.pdf, accessed December 2016.
    29. 29)
      • 29. http://www.ets-lindgren.com/EMCAbsorbers, accessed December 2016.
    30. 30)
      • 30. Parini, C., Gregson, S., Mccormick, J., et al: ‘Theory and practice of modern antenna range measurements’ (IET, 2015, 1st edn.).
    31. 31)
      • 31. Balanis, C.A.: ‘Modern antenna handbook’ (John Wiley & Sons, 2008, 1st edn.).
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