Orbital angular momentum spectrum of antenna vortex beam based on loop integration

Due to the divergence characteristics of vortex microwaves, it is difficult to determine orbital angular momentum (OAM) orders through far fields, while the spiral spectrum analysis method based on the area integral of antenna near fields is complicated. In this paper, combined with near-field appro...

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Autores principales:	Guang Yang, Lei Zhang, Weiwen Li, Qing Huo Liu
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/e6a42a9851e24f4eb9285d79cd55e2ed
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id	oai:doaj.org-article:e6a42a9851e24f4eb9285d79cd55e2ed
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spelling	oai:doaj.org-article:e6a42a9851e24f4eb9285d79cd55e2ed2021-12-01T18:52:06ZOrbital angular momentum spectrum of antenna vortex beam based on loop integration2158-322610.1063/5.0062179https://doaj.org/article/e6a42a9851e24f4eb9285d79cd55e2ed2021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0062179https://doaj.org/toc/2158-3226Due to the divergence characteristics of vortex microwaves, it is difficult to determine orbital angular momentum (OAM) orders through far fields, while the spiral spectrum analysis method based on the area integral of antenna near fields is complicated. In this paper, combined with near-field approximation processing, a spiral spectrum analysis method based on loop integration is proposed. According to the Laguerre–Gaussian vortex beam model, the key parameter estimation formulas suitable for low-order OAM microwave beams are derived, including the position of the reliable observation plane and the size of the annulus area. On this basis, the radius of the integral loop used for the spiral spectrum calculation is provided. Since only field data on the loop are collected in this method, the calculation amount is reduced and the analysis efficiency of the spiral spectrum is greatly improved. Due to the combination of near-field and far-field considerations, this method can fully reflect the spiral spectrum characteristics of antenna vortex waves.Guang YangLei ZhangWeiwen LiQing Huo LiuAIP Publishing LLCarticlePhysicsQC1-999ENAIP Advances, Vol 11, Iss 11, Pp 115204-115204-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Guang Yang Lei Zhang Weiwen Li Qing Huo Liu Orbital angular momentum spectrum of antenna vortex beam based on loop integration
description	Due to the divergence characteristics of vortex microwaves, it is difficult to determine orbital angular momentum (OAM) orders through far fields, while the spiral spectrum analysis method based on the area integral of antenna near fields is complicated. In this paper, combined with near-field approximation processing, a spiral spectrum analysis method based on loop integration is proposed. According to the Laguerre–Gaussian vortex beam model, the key parameter estimation formulas suitable for low-order OAM microwave beams are derived, including the position of the reliable observation plane and the size of the annulus area. On this basis, the radius of the integral loop used for the spiral spectrum calculation is provided. Since only field data on the loop are collected in this method, the calculation amount is reduced and the analysis efficiency of the spiral spectrum is greatly improved. Due to the combination of near-field and far-field considerations, this method can fully reflect the spiral spectrum characteristics of antenna vortex waves.
format	article
author	Guang Yang Lei Zhang Weiwen Li Qing Huo Liu
author_facet	Guang Yang Lei Zhang Weiwen Li Qing Huo Liu
author_sort	Guang Yang
title	Orbital angular momentum spectrum of antenna vortex beam based on loop integration
title_short	Orbital angular momentum spectrum of antenna vortex beam based on loop integration
title_full	Orbital angular momentum spectrum of antenna vortex beam based on loop integration
title_fullStr	Orbital angular momentum spectrum of antenna vortex beam based on loop integration
title_full_unstemmed	Orbital angular momentum spectrum of antenna vortex beam based on loop integration
title_sort	orbital angular momentum spectrum of antenna vortex beam based on loop integration
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/e6a42a9851e24f4eb9285d79cd55e2ed
work_keys_str_mv	AT guangyang orbitalangularmomentumspectrumofantennavortexbeambasedonloopintegration AT leizhang orbitalangularmomentumspectrumofantennavortexbeambasedonloopintegration AT weiwenli orbitalangularmomentumspectrumofantennavortexbeambasedonloopintegration AT qinghuoliu orbitalangularmomentumspectrumofantennavortexbeambasedonloopintegration
_version_	1718404663209885696

Orbital angular momentum spectrum of antenna vortex beam based on loop integration

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