Experimental demonstration of a millimeter-wave metallic ENZ lens based on the energy squeezing principle
Date
2015Author
Version
Acceso abierto / Sarbide irekia
Type
Artículo / Artikulua
Version
Versión aceptada / Onetsi den bertsioa
Impact
|
10.1109/TAP.2014.2368112
Abstract
The performance of an epsilon-near zero (ENZ) plano-concave lens is experimentally demonstrated and verified at the D-band of the millimeter-waves. The lens is comprised of an array of narrow metallic waveguides near cut-off frequency, which effectively behaves as an epsilon-near-zero medium at 144 GHz. A good matching with free space is achieved by exploiting the phenomenon of energy squeezing a ...
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The performance of an epsilon-near zero (ENZ) plano-concave lens is experimentally demonstrated and verified at the D-band of the millimeter-waves. The lens is comprised of an array of narrow metallic waveguides near cut-off frequency, which effectively behaves as an epsilon-near-zero medium at 144 GHz. A good matching with free space is achieved by exploiting the phenomenon of energy squeezing and a clear focus with a transmission enhancement of 15.9 dB is measured. The lens shows good radiation properties with a directivity of 17.6 dBi and low cross-polar components of -34 dB. All results are supported by numerical simulations. [--]
Subject
Epsilon-near-zero,
Energy squeezing,
Metallic lenses,
Metamaterials,
Millimeter wave devices
Publisher
IEEE
Published in
IEEE Transactions on Antennas and Propagation, 2015, 63(1), 231-239
Departament
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Publisher version
Sponsorship
This work was supported in part by the Spanish Government under contract Consolider Engineering Metamaterials CSD2008-00066 and contract TEC2011-28664-C02-01. The work of V. Torres was supported by the Universidad Pública de Navarra. The work of B. Orazbayev was supported by the Spanish Ministerio de Economía y Competitividad under grant no. FPI BES-2012-054909. The work of V. Pacheco-Peña was supported by the Spanish Ministerio de Educación, Cultura y Deporte under grant no. FPU AP-2012-3796. The work of M. Beruete was supported by the Spanish Government via RYC-2011-08221. The work of M. Navarro-Cía was supported by the Imperial College Junior Research Fellowship.