On the performance of the zoned fishnet metamaterial lens with positive and negative reference phase
Fecha
2016Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Impacto
|
10.1109/LAWP.2016.2642301
Resumen
In this letter, several converging fishnet metalenses are designed using both the zoning and reference phase techniques. They are engineered with a focal length of 1.5λ0 at the design frequency of 55 GHz (λ0 = 5.45 mm) at which the fishnet metamaterial has an effective refractive index of nlens = ∼0.68. Three metalenses are analyzed—with positive, negative, and without reference phase—in order to ...
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In this letter, several converging fishnet metalenses are designed using both the zoning and reference phase techniques. They are engineered with a focal length of 1.5λ0 at the design frequency of 55 GHz (λ0 = 5.45 mm) at which the fishnet metamaterial has an effective refractive index of nlens = ∼0.68. Three metalenses are analyzed—with positive, negative, and without reference phase—in order to compare their performance. The focal properties are evaluated both numerically and experimentally, demonstrating a good agreement between them. The best performance is achieved for the zoned metalens with positive reference phase,with an experimental power enhancement at the focal length of 6.2 dB, better axial resolution (0.65λ0 ), and reduced lateral lobes compared to other designs [--]
Materias
Fishnet metamaterial,
Fresnel zoning,
Millimeter waves,
Zoned lenses
Editor
IEEE
Publicado en
IEEE Antennas and Wireless Propagation Letters, vol. 16, 2017
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila /
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC
Versión del editor
Entidades Financiadoras
This work was supported by the Spanish
Ministerio de Economía y Competitividad under contract TEC2014-51902-
C2-2-R and partially by the Tomsk State University Competitiveness
Improvement Program Nº 8.1.23.2015. V.P.-P.is sponsored by Spanish
Ministerio de Educación, Cultura y Deporte under grant FPU AP-2012-3796.
M.B. is sponsored by the Spanish Ministerio de Economía y Competitividad
via RYC-2011-08221.