Comparison of Three Body Models of Different Complexities in Modelling of Equal-Sized Dipole and Folded Dipole Wearable Passive UHF RFID Tags
Keywords:
Dipole, e-textile, folded dipole, human body model, RFID tag, wearable antennaAbstract
We compare the performance of equal-sized dipole and folded dipole wearable passive UHF RFID tags using three different body models for the torso of an adult male: cuboid and anatomical models with and without internal structures. The results show that all models estimate the antenna impedance matching appropriately, but only the anatomical models predict the full spatial coverage of the tags properly. We present a novel metrics for analysing the coverage in simulations and compare the simulated and measured tag read ranges to validate our modelling results.
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References
J. M. Rabaey, “The human intranet—where swarms and humans meet,” IEEE Pervasive Comput., vol. 14, no. 1, pp. 78-83, Jan.-Mar. 2015.
S. Lemey, F. Declercq, and H. Rogier, “Textile antennas as hybrid energy-harvesting platforms,” Proc. IEEE, vol. 102, no. 11, pp. 1833-1857, Nov. 2014.
A. Sani, M. Rajab, R. Forster, and Y. Hao, “Antennas and propagation of implanted RFIDs for pervasive healthcare applications,” Proc. IEEE, vol. 98, no. 9, pp. 1648-1655, Sep. 2010.
A. Yakovlev, S. Kim, and A. Poon, “Implantable biomedical devices: Wireless powering and communication,” IEEE Commun. Mag., vol. 50, no. 4, pp. 152-159, Apr. 2012.
Z. Fu and F. Yang, “A slotted patch antenna integrated with thermal switch for high-sensitivity temperature monitoring,” IEEE Antennas Wireless Propag. Lett., vol. 14, pp. 998-1001, Jan. 2015.
O. O. Rakibet, C. V. Rumens, J. C. Batchelor, and S. J. Holder, “Epidermal passive RFID strain sensor for assisted technologies,” IEEE Antennas Wireless Propag. Lett., vol. 13, pp. 814-817, Apr. 2014.
F. Long, X. Zhang, T. Björninen, J. Virkki, L. Sydänheimo, Y.-C. Chan, and L. Ukkonen, “Implementation and wireless readout of passive UHF RFID strain sensor tags based on electrotextile antennas,” in Proc. 2015 European Conf. Antennas Propag., 5 pages, 2015.
X. Chen, L. Ukkonen, T. Björninen, and J. Virkki, “Comparison of e-textile dipole and folded dipole antennas for wearable passive UHF RFID tags,” accepted in PIERS, Singapore, 19-22 Nov. 2017.
IT’IS Fondation, Tissue Properties. Available: https://www.itis.ethz.ch/virtual-population/tissueproperties/downloads/
T. A. Milligan: Modern Antenna Design. 2nd ed., John-Wiley & Sons, Inc., 2005.
