@article{almeida filho_campos_2014,  title={Performance optimization of microstrip antenna array using frequency selective surfaces},  volume={13},  ISSN={2179-1074},  url={https://doi.org/10.1590/S2179-10742014000100003},  DOI={10.1590/S2179-10742014000100003},  number={1},  journal={Journal of Microwaves, Optoelectronics and Electromagnetic Applications},  publisher={Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo},  author={Almeida Filho, Valdez A. and Campos, Antonio Luiz P. S.},  year={2014},  month={Jan},  pages={31–46} }