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International Journal of Antennas and Propagation
Volume 2012, Article ID 535673, 6 pages
http://dx.doi.org/10.1155/2012/535673
Research Article

Direct Synthesis of Dual-Parameter Concentric Ring RA with Enhanced Bandwidth

1Dipartimento di Energia, Politecnico di Milano, 20156 Milan, Italy
2Dipartimento di Elettronica e Telecomunicazioni, Politecnico di Torino, 10129 Turin, Italy

Received 3 March 2012; Accepted 25 June 2012

Academic Editor: Sandra Costanzo

Copyright © 2012 Bui Van Ha 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.

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