Cavity-excited Huygens' metasurface antennas for near-unity aperture illumination efficiency from arbitrarily large apertures

Nature Communications
Ariel EpsteinGeorge V Eleftheriades

Abstract

One of the long-standing problems in antenna engineering is the realization of highly directive beams using low-profile devices. In this paper, we provide a solution to this problem by means of Huygens' metasurfaces (HMSs), based on the equivalence principle. This principle states that a given excitation can be transformed to a desirable aperture field by inducing suitable electric and (equivalent) magnetic surface currents. Building on this concept, we propose and demonstrate cavity-excited HMS antennas, where the single-source-fed cavity is designed to optimize aperture illumination, while the HMS facilitates the current distribution that ensures phase purity of aperture fields. The HMS breaks the coupling between the excitation and radiation spectra typical to standard partially reflecting surfaces, allowing tailoring of the aperture properties to produce a desirable radiation pattern, without incurring edge-taper losses. The proposed low-profile design yields near-unity aperture illumination efficiencies from arbitrarily large apertures, offering new capabilities for microwave, terahertz and optical radiators.

References

Feb 1, 2011·Nature Materials·Erik LierJeremy A Bossard
May 28, 2013·Physical Review Letters·Carl Pfeiffer, Anthony Grbic
Jun 22, 2013·Optics Express·Michael Selvanayagam, George V Eleftheriades
Jan 24, 2014·Nature Materials·Nanfang Yu, Federico Capasso
Apr 3, 2014·Nano Letters·Carl PfeifferAnthony Grbic
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Apr 4, 2015·Optics Express·Salvatore CampioneMichael B Sinclair

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Citations

Nov 30, 2016·Scientific Reports·Ahmed Toaha Mobashsher, A M Abbosh
Feb 25, 2017·Advanced Materials·Ke ChenCheng-Wei Qiu
Feb 7, 2018·Optics Express·Badreddine RatniShah Nawaz Burokur
Feb 7, 2017·Reports on Progress in Physics·Francesco Monticone, Andrea Alù
Jul 1, 2020·Scientific Reports·Marcello ZucchiGiuseppe Vecchi
Jun 5, 2017·Scientific Reports·Ren WangXiao Ding
Jun 19, 2020·Optics Express·Muhammad Rizwan AkramWeiren Zhu
Aug 27, 2016·Physical Review Letters·Carl Pfeiffer, Anthony Grbic
Dec 1, 2018·Nano Letters·Mingkai Liu, Duk-Yong Choi
Dec 7, 2018··Jiahui FuZhuochao Wang

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