@INPROCEEDINGS {2736,
author={J.R. Costa and M. G. Silveirinha and C. A. Fernandes},
doi={},
booktitle={IEEE AP-S/URSI International Symp.},
title={Double-Shell Axial-Symmetric Imaging Lens Antenna for Space Applications},
year={2005},
month={July},
volume={1B},
pages={438-441} 
}