@INPROCEEDINGS {28078,
author={T. Varum and J. M.  Matos and P. Pinho},
doi={},
booktitle={IEEE AP-S/URSI International Symp.},
title={Non-uniform microstrip antenna array for tolling using a single access lane},
year={2016},
month={July},
volume={1},
pages={1-2} 
}