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International Journal of Antennas and Propagation
Volume 2015 (2015), Article ID 614780, 5 pages
http://dx.doi.org/10.1155/2015/614780
Research Article

Simple, Compact, and Multiband Frequency Selective Surfaces Using Dissimilar Sierpinski Fractal Elements

1Pontifical Catholic University of Rio de Janeiro (PUC-Rio), 22453-900 Rio de Janeiro, RJ, Brazil
2Federal University of Rio Grande do Norte (UFRN), Caixa Postal 1655, 59078-970 Natal, RN, Brazil
3Federal Institute of Education, Science and Technology of Paraíba (IFPB), 58015-430 João Pessoa, PB, Brazil

Received 7 June 2015; Revised 7 October 2015; Accepted 8 October 2015

Academic Editor: N. Nasimuddin

Copyright © 2015 Clarissa de Lucena Nóbrega et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a design methodology for frequency selective surfaces (FSSs) using metallic patches with dissimilar Sierpinski fractal elements. The transmission properties of the spatial filters are investigated for FSS structures composed of two alternately integrated dissimilar Sierpinski fractal elements, corresponding to fractal levels , 2, and 3. Two FSS prototypes are fabricated and measured in the range from 2 to 12 GHz to validate the proposed fractal designs. The FSSs with dissimilar Sierpinski fractal patch elements are printed on RT/Duroid 6202 high frequency laminate. The experimental characterization of the FSS prototypes is accomplished through two different measurement setups composed of commercial horns and elliptical monopole microstrip antennas. The obtained results confirm the compactness and multiband performance of the proposed FSS geometries, caused by the integration of dissimilar fractal element. In addition, the proposed FSSs exhibited frequency tuning ability on the multiband frequency responses. Agreement between simulated and measured results is reported.