@INPROCEEDINGS {38780,
author={D.  Matos and R.  Torres and R.  Correia and N.B.C. Carvalho},
doi={10.1109/WPTC51349.2021.9458113},
booktitle={IEEE Wireless Power Transfer Conf. - WPTC},
title={Ultra-Wideband 4-PAM Backscatter Modulator based on BiCMOS technology for IoT/WPT Applications},
year={2021},
month={June},
volume={},
pages={-} 
}