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Experimental demonstration of metamaterials application for mitigating scan blindness in phased array antennas

: Rodríguez-Ulibarri, P.; Crépin, T.; Martel, C.; Boust, F.; Falcone, F.; Löcker, C.; Herbertz, K.; Bertuch, T.; Dousset, T.; Martinaud, J.-P.; Maci, M.; Marcotegui, J.A.; Beruete, M.

Volltext ()

EPJ Applied Metamaterials. Online journal 3 (2016), Article 9, 9 S.
ISSN: 2272-2394
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer FHR ()

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.