@ARTICLE {20170,
author={D. Ferreira and I. Cuinas and R. F. S. Caldeirinha and T.  Fernandes},
doi={10.1109/TAP.2016.2631131},
journal={IEEE Transactions on Antennas and Propagation},
title={3-D Mechanically Tunable Square Slot FSS},
year={2017},
month={January},
volume={65},
number={1},
pages={242-250},
ISSN={0018-926X}
}