Research Article
Characterisation of On-Body Communications at 2.45 GHz
@INPROCEEDINGS{10.4108/icst.bodynets.2011.247059, author={Carla Oliveira and Carlos Lopes and Michal Mackowiak and Luis Correia}, title={Characterisation of On-Body Communications at 2.45 GHz}, proceedings={6th International ICST Conference on Body Area Networks}, publisher={ICST}, proceedings_a={BODYNETS}, year={2012}, month={6}, keywords={body area networks on-body return loss path loss}, doi={10.4108/icst.bodynets.2011.247059} }- Carla Oliveira
Carlos Lopes
Michal Mackowiak
Luis Correia
Year: 2012
Characterisation of On-Body Communications at 2.45 GHz
BODYNETS
ICST
DOI: 10.4108/icst.bodynets.2011.247059
Abstract
This work focuses on the characterisation of on-body communications using patch antennas at 2.45 GHz. An investigation on the effects of the body in the communication link is done, based on measurements, for a range of body postures and on-body links. Return reflection loss results show that, on average, the antenna performance is 0.6 dB worse than in free space, also presenting a small detuning (<5 MHz). A fitting to the Normal Distribution is proven to be acceptable. Up to 33 dB of dispersion of values is verified for path links with the same length, as a consequence of antenna mismatch, which can turn a quasi-line-of-sight link into a non-line-of-sight one, increasing path loss up to 15 dB.
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