@INPROCEEDINGS {34380,
author={F.  Pereira and R.  Correia and N.B.C. Carvalho},
doi={},
booktitle={IEEE Wireless Power Transfer Conf. - WPTC},
title={Comparison of active and passive sensors for IoT applications},
year={2018},
month={June},
volume={},
pages={-} 
}