@ARTICLE {20130,
author={R.  Correia and N.B.C. Carvalho and S.  Kawasaki},
doi={10.1109/TMTT.2016.2603985},
journal={IEEE Transactions on Microwave Theory and Techniques},
title={Continuously Power Delivering for Passive Backscatter Wireless Sensor Networks},
year={2016},
month={September},
volume={64},
number={11},
pages={3723 -3731},
ISSN={0018-9480}
}