Experimental demonstration of metamaterials application for mitigating scan blindness in phased array antennas
Department of Electrical and Electronical Engineering, Universidad Pública de Navarra, Campus Arrosadía, 31006
2 ONERA – The French Aerospace Lab, Toulouse, France
3 Institute of Smart Cities, Universidad Pública de Navarra, Campus Arrosadía, 31006 Pamplona, Spain
4 Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR, Wachtberg, Germany
5 Thales Systèmes Aéroportés (TSA), Elancourt Cedex, France
6 Department of Information Engineering and Mathematics, University of Siena, Italy
7 TAFCO Metawireless S.L., Aizoáin, Spain
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Accepted: 1 July 2016
Published online: 5 October 2016
This paper presents two metamaterial-inspired solutions to mitigate the scan blindness effects in a phased array antenna. In the first solution, portions of a bed of nails are introduced in the radome to prevent the excitation of surface waves. In the second solution, a superstrate metasurface is designed to synthesize a permittivity tensor optimized to achieve a wide angle impedance matching. In both approaches, the numerical simulations are successfully compared with measurements of a phased array antenna prototype with 100 elements. The wire medium-based solution reveals an effective way for reducing the blind-spot in a wide bandwidth, while the metaradome has been found less suitable for the same purpose.
Key words: Phased array / Scan blindness / Metasurface / Metamaterial / Wire medium
© P. Rodríguez-Ulibarri et al., Published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.