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Experimental Characterization of UWB On-Body Radio Channel in Indoor Environment Considering Different Antennas

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7 Author(s)
Sani, A. ; Sch. of Electron. Eng. & Comput. Sci., Queen Mary, Univ. of London, London, UK ; Alomainy, A. ; Palikaras, G. ; Nechayev, Y.
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An experimental investigation to characterize the transient and spectral behavior of the ultrawideband (UWB) on-body radio propagation channel for body-centric wireless communications is presented. The measurements were performed considering over thirty on-body links in the front of human body in the anechoic chamber, and in indoor environment. Two different pairs of planar antennas have been used, namely, CPW-fed planar inverted cone antennas (PICA), and miniaturized CPW-fed tapered slot antennas (TSA). A path loss model is extracted from measured data, and a statistical study is performed on the time delay parameters. The goodness of different statistical models in fitting the root mean square (RMS) delay has been evaluated. Results demonstrate that the TSA, due to its more directive radiation behavior is less affected from the reflections from body parts and surrounding environment. The antenna shows significant size reduction and improved time delay behavior, and hence is an ideal candidate for UWB body area networks (BAN).

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Antennas and Propagation, IEEE Transactions on  (Volume:58 ,  Issue: 1 )