A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas

A class of lightweight spherical-axicon-like dielectric lenses suitable for enhancing broadband antennas performances is presented. The proposed lenses, sized according to a reference massive lens, are formed by thin dielectric sheets spaced equiangularly on the azimuth plane (petal-shaped lens), or...

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Autores principales:	Renato Cicchetti, Valentina Cicchetti, Antonio Faraone, Orlandino Testa
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Dielectric resonator antennas (DRA) high gain wideband antenna petal-shaped dielectric lens spherical-axicon dielectric lens stacked-disk dielectric lens traveling-wave antennas Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/f8e95754ef604559b165b7328170e669
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spelling	oai:doaj.org-article:f8e95754ef604559b165b7328170e6692021-11-18T00:01:06ZA Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas2169-353610.1109/ACCESS.2021.3122575https://doaj.org/article/f8e95754ef604559b165b7328170e6692021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9585095/https://doaj.org/toc/2169-3536A class of lightweight spherical-axicon-like dielectric lenses suitable for enhancing broadband antennas performances is presented. The proposed lenses, sized according to a reference massive lens, are formed by thin dielectric sheets spaced equiangularly on the azimuth plane (petal-shaped lens), or regularly orthogonally arranged along the lens axis (disks-shaped lens), thus yielding construction simplicity and significant weight reduction. While petal-shaped dielectric lenses are shown to yield mild gain increase, lenses made by thin dielectric disks, orthogonally periodically arranged along the lens optical axis, offer performances much closer to those achieved by comparable massive refractive spherical-axicon dielectric lenses. The time-domain and the focusing characteristics of the proposed lenses are investigated. Then, a Floquet’s mode-based model is proposed to describe the stop-band characteristics of stacked-disk lenses, illustrating the mechanism underpinning their sudden performance degradation observed at the stop-band onset frequency. Full-wave analyses, based on a locally conformal finite integration technique (FIT), implemented in CST Studio Suite™ and validated by measurements or highly accurate FEM simulations, illustrate the excellent characteristics of the proposed lenses to operate with narrowband as well as ultra-wideband (UWB) waveforms.Renato CicchettiValentina CicchettiAntonio FaraoneOrlandino TestaIEEEarticleDielectric resonator antennas (DRA)high gain wideband antennapetal-shaped dielectric lensspherical-axicon dielectric lensstacked-disk dielectric lenstraveling-wave antennasElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 151873-151887 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dielectric resonator antennas (DRA) high gain wideband antenna petal-shaped dielectric lens spherical-axicon dielectric lens stacked-disk dielectric lens traveling-wave antennas Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Dielectric resonator antennas (DRA) high gain wideband antenna petal-shaped dielectric lens spherical-axicon dielectric lens stacked-disk dielectric lens traveling-wave antennas Electrical engineering. Electronics. Nuclear engineering TK1-9971 Renato Cicchetti Valentina Cicchetti Antonio Faraone Orlandino Testa A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas
description	A class of lightweight spherical-axicon-like dielectric lenses suitable for enhancing broadband antennas performances is presented. The proposed lenses, sized according to a reference massive lens, are formed by thin dielectric sheets spaced equiangularly on the azimuth plane (petal-shaped lens), or regularly orthogonally arranged along the lens axis (disks-shaped lens), thus yielding construction simplicity and significant weight reduction. While petal-shaped dielectric lenses are shown to yield mild gain increase, lenses made by thin dielectric disks, orthogonally periodically arranged along the lens optical axis, offer performances much closer to those achieved by comparable massive refractive spherical-axicon dielectric lenses. The time-domain and the focusing characteristics of the proposed lenses are investigated. Then, a Floquet’s mode-based model is proposed to describe the stop-band characteristics of stacked-disk lenses, illustrating the mechanism underpinning their sudden performance degradation observed at the stop-band onset frequency. Full-wave analyses, based on a locally conformal finite integration technique (FIT), implemented in CST Studio Suite™ and validated by measurements or highly accurate FEM simulations, illustrate the excellent characteristics of the proposed lenses to operate with narrowband as well as ultra-wideband (UWB) waveforms.
format	article
author	Renato Cicchetti Valentina Cicchetti Antonio Faraone Orlandino Testa
author_facet	Renato Cicchetti Valentina Cicchetti Antonio Faraone Orlandino Testa
author_sort	Renato Cicchetti
title	A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas
title_short	A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas
title_full	A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas
title_fullStr	A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas
title_full_unstemmed	A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas
title_sort	class of lightweight spherical-axicon dielectric lenses for high gain wideband antennas
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/f8e95754ef604559b165b7328170e669
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A Class of Lightweight Spherical-Axicon Dielectric Lenses for High Gain Wideband Antennas

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