Zoned near-zero refractive index fishnet lens antenna: Steering millimeter waves

V. Pacheco-Peña, B. Orazbayev, U. Beaskoetxea, M. Beruete, Miguel Navarro-Cia

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)
191 Downloads (Pure)

Abstract

A zoned fishnet metamaterial lens is designed, fabricated, and experimentally demonstrated at millimeter wavelengths to work as a negative near-zero refractive index lens suitable for compact lens antenna configurations. At the design frequency f=56.7GHz (λ0=5.29mm), the zoned fishnet metamaterial lens, designed to have a focal length FL=9λ0, exhibits a refractive index n=-0.25. The focusing performance of the diffractive optical element is briefly compared with that of a non-zoned fishnet metamaterial lens and an isotropic homogeneous zoned lens made of a material with the same refractive index. Experimental and numerically-computed radiation diagrams of the fabricated zoned lens are presented and compared in detail with that of a simulated non-zoned lens. Simulation and experimental results are in good agreement, demonstrating an enhancement generated by the zoned lens of 10.7dB, corresponding to a gain of 12.26dB. Moreover, beam steering capability of the structure by shifting the feeder on the xz-plane is demonstrated.

Original languageEnglish
Article number124902
JournalJournal of Applied Physics
Volume115
Issue number12
DOIs
Publication statusPublished - 28 Mar 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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