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Beamforming by Left-Handed Extraordinary Transmission Metamaterial Bi- and Plano-Concave Lens at Millimeter-Waves

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4 Author(s)
Navarro-Cia, M. ; Millimeter & Terahertz Waves Lab., Univ. Publica de Navarra, Pamplona, Spain ; Beruete, M. ; Campillo, I. ; Ayza, M.S.

A deep analysis of bi- and plano-concave lens made of stacked subwavelength hole arrays in terms of focus and angular power distribution is presented. The key difference between these left-handed extraordinary transmission lenses (LHET-lenses) and the classical metallic lenses is based on the fact that contrary to the latter ones, LHET-lenses work in the cut-off region of the circular waveguide formed by consecutive stacked holes. This leads to a negative index of refraction, whereas metallic lenses exhibit a positive but less than one index of refraction.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:59 ,  Issue: 6 )