A Small-Divergence-Angle Orbital Angular Momentum Metasurface Antenna.
Journal
Research (Washington, D.C.)
ISSN: 2639-5274
Titre abrégé: Research (Wash D C)
Pays: United States
ID NLM: 101747148
Informations de publication
Date de publication:
2019
2019
Historique:
received:
08
08
2019
accepted:
16
09
2019
entrez:
11
1
2020
pubmed:
11
1
2020
medline:
11
1
2020
Statut:
epublish
Résumé
Electromagnetic waves carrying an orbital angular momentum (OAM) are of great interest. However, most OAM antennas present disadvantages such as a complicated structure, low efficiency, and large divergence angle, which prevents their practical applications. So far, there are few papers and research focuses on the problem of the divergence angle. Herein, a metasurface antenna is proposed to obtain the OAM beams with a small divergence angle. The circular arrangement and phase gradient were used to simplify the structure of the metasurface and obtain the small divergence angle, respectively. The proposed metasurface antenna presents a high transmission coefficient and effectively decreases the divergence angle of the OAM beam. All the theoretical analyses and derivation calculations were validated by both simulations and experiments. This compact structure paves the way to generate OAM beams with a small divergence angle.
Identifiants
pubmed: 31922148
doi: 10.34133/2019/9686213
pmc: PMC6946278
doi:
Types de publication
Journal Article
Langues
eng
Pagination
9686213Informations de copyright
Copyright © 2019 Jianchun Xu et al.
Déclaration de conflit d'intérêts
The authors declare no competing financial interests.
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