Ultra-compact planoconcave zoned metallic lens based on the fishnet metamaterial
V. Pacheco-Pena, B. Orazbayev, V. Torres, M. Beruete, M. Navarro-Cia
Applied Physics Letters
Volume: 103, Issue: 18, October 2013
183507 - 183507-5
A 1.5 ?0-thick planoconcave zoned lens based on the fishnet metamaterial is demonstrated experimentally at millimeter wavelengths. The zoning technique applied allows a volume reduction of 60% compared to a full fishnet metamaterial lens without any deterioration in performance. The structure is designed to exhibit an effective refractive index n=-0.25 at f=56.7 GHz ( ?0=5.29 mm) with a focal length FL=47.62mm=9 ?0. The experimental enhancement achieved is 11.1 dB, which is in good agreement with simulation and also with previous full fishnet metamaterial lenses and opens the door for integrated solutions.
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