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

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 l...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2008-04, Vol.56 (4), p.951-960
Main Authors: Saenz, E., Gonzalo, R., Ederra, I., Vardaxoglou, J.C., de Maagt, P.
Format: Article
Language:English
Subjects:
Antenna arrays
Antennas
Apertures
Applied sciences
Arrays
Dielectrics
Dipole antennas
Effective area
Exact sciences and technology
Frequency selective surfaces
Gain
meta-surfaces and multifrequency arrays
Metamaterials
Multifrequency antennas
Noise levels
Periodic structures
Radiocommunications
Resonance
Simulation
Space technology
Telecommunications
Telecommunications and information theory
Tuning
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Summary: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 lambda 0 /4), and low back radiation.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2008.919212