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Resonant Meta-Surface Superstrate for Single and Multifrequency Dipole Antenna Arrays

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5 Author(s)
Saenz, E. ; Public Univ. of Navarra, Pamplona ; Gonzalo, R. ; Ederra, I. ; Vardaxoglou, J.C.
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The design of a multifrequency dipole antenna array based on a resonant meta-surface superstrate is proposed. The behavior of a single element that is closely placed to a meta-surface is experimentally investigated. The proposed meta-surface is based on resonating unit cells formed by capacitively loaded strips and split ring resonators. By tuning a dipole antenna to the pass band of the meta-surface, the physical area is effectively illuminated enhancing the radiation performance. The gain, radiation efficiency and effective area values of the whole configuration are compared to the ones obtained with a single dipole without superstrate. Radiation efficiency values for the proposed configuration of more than 80% and gain values of more than 4.5 plusmn 1 dB are obtained. Based on this configuration, simulated results of a multifrequency antenna array are presented. Distinctive features of this configuration are high isolation between elements (20 dB for a distance of lambda0/4), and low back radiation.

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Antennas and Propagation, IEEE Transactions on  (Volume:56 ,  Issue: 4 )