Title :
Focusing millimetre waves by means of a permittivity-near zero narrow-waveguide lens
Author :
Pacheco-Pena, V. ; Torres, V. ; Orazbayev, B. ; Beruete, M. ; Navarro-Cia, M. ; Engheta, Nader
Author_Institution :
TERALAB (MmW - THz - IR & Plasmonics Lab.), Univ. Publica de Navarra, Pamplona, Spain
Abstract :
An epsilon-near zero (ENZ) plano-concave lens is designed, numerically studied and experimentally demonstrated at millimeter-waves. The metallic lens is synthesized by an array of stacked narrow hollow rectangular waveguides working near cutoff emulating an ENZ medium. At the working frequency (f0 = 144 GHz, λ0 = 2.08 mm) the focusing properties of the lens demonstrate an experimental transmission power enhancement of 15.9 dB with a good impedance matching with free space.
Keywords :
lenses; rectangular waveguides; epsilon near zero plano concave lens; impedance matching; metallic lens; millimetre waves; permittivity near zero narrow waveguide lens; stacked narrow hollow rectangular waveguides; Electromagnetics; Hollow waveguides; Lenses; Metamaterials; Optical waveguides;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2014 8th International Congress on
Conference_Location :
Lyngby
Print_ISBN :
978-1-4799-3450-8
DOI :
10.1109/MetaMaterials.2014.6948658
