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Proceedings Paper

Bidimensional phase-varying metamaterial for steering beam antenna
Author(s): Abdelwaheb Ourir; Shah Nawaz Burokur; André de Lustrac
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Paper Abstract

Dielectric substrates supporting planar periodic subwavelength metamaterial-based metallic arrays and presenting frequency dispersive phase characteristics are applied to ultra-compact high-gain and high-directivity planar antennas. In this paper, different models of metamaterial-based surfaces introducing a zero degree reflection phase shift to incident waves are firstly studied numerically using finite-element method analysis where the bandwidth and operation frequency are predicted. These surfaces are then applied in a resonant Fabry-Perot type cavity and a ray optics analysis is used to design different models of ultra-compact high-gain microstrip printed antennas. Firstly, a cavity antenna of thickness &lgr;/60 based on the use of a microstrip patch antenna and two bidimensional metamaterial-based surfaces, the first one acting as a High Impedance Surface (HIS) and the second one acting as a Partially Reflecting Surface (PRS) is designed. This cavity is then optimized for easier fabrication process and loss reduction by the use of only one bidimensionnal composite metamaterial-based surface acting as a PRS. Secondly, another surface presenting a variable phase by the use of a non periodic metamaterial-based metallic strips array is designed for a passive low-profile steering beam antenna application. Finally, a switchable operation frequency cavity by the implementation of varicap diodes is designed and fabricated. All these cavity antennas operate on subwavelength modes, the smallest cavity thickness being of the order of &lgr;/60.

Paper Details

Date Published: 4 May 2007
PDF: 11 pages
Proc. SPIE 6581, Metamaterials II, 65810R (4 May 2007); doi: 10.1117/12.724568
Show Author Affiliations
Abdelwaheb Ourir, Univ. Paris-Sud, UMR 8622/CNRS (France)
Shah Nawaz Burokur, Univ. Paris-Sud, UMR 8622/CNRS (France)
André de Lustrac, Univ. Paris-Sud, UMR 8622/CNRS (France)

Published in SPIE Proceedings Vol. 6581:
Metamaterials II
Vladimir Kuzmiak; Peter Markos; Tomasz Szoplik, Editor(s)

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