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Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field
Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays. Microstrip patches on dielectric substrates were designed to radiate the particular O...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5634501/ https://www.ncbi.nlm.nih.gov/pubmed/28993689 http://dx.doi.org/10.1038/s41598-017-13125-5 |
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author | Byun, Woo Jin Do Choi, Hyung Cho, Yong Heui |
author_facet | Byun, Woo Jin Do Choi, Hyung Cho, Yong Heui |
author_sort | Byun, Woo Jin |
collection | PubMed |
description | Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays. Microstrip patches on dielectric substrates were designed to radiate the particular OAM modes for arithmetic mode combining, where two OAM wave-generating reflectarrays are very closely placed in the near-field. We conducted near-field antenna measurements at 18 [GHz] by manually replacing the sub-reflectarray substrates with different OAM mode numbers of 0, ±1, when the OAM mode number of the main reflectarray was fixed to +1. We subsequently checked the azimuthal phase distributions of the reflected total electromagnetic waves in the near-field, and verified that the OAM waves mutually reflected from the main and sub-reflectarrays are added or subtracted to each other according to their OAM mode numbers. Based on our proposal, an OAM mode-canceling reflectarray antenna was designed, and the following measurements indicate that the antenna has a better reflection bandwidth and antenna gain than a conventional reflectarray antenna. The concept of OAM mode canceling in the near-field can contribute widely to a new type of low-profile, broad-reflection bandwidth, and high-gain antenna. |
format | Online Article Text |
id | pubmed-5634501 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56345012017-10-18 Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field Byun, Woo Jin Do Choi, Hyung Cho, Yong Heui Sci Rep Article Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays. Microstrip patches on dielectric substrates were designed to radiate the particular OAM modes for arithmetic mode combining, where two OAM wave-generating reflectarrays are very closely placed in the near-field. We conducted near-field antenna measurements at 18 [GHz] by manually replacing the sub-reflectarray substrates with different OAM mode numbers of 0, ±1, when the OAM mode number of the main reflectarray was fixed to +1. We subsequently checked the azimuthal phase distributions of the reflected total electromagnetic waves in the near-field, and verified that the OAM waves mutually reflected from the main and sub-reflectarrays are added or subtracted to each other according to their OAM mode numbers. Based on our proposal, an OAM mode-canceling reflectarray antenna was designed, and the following measurements indicate that the antenna has a better reflection bandwidth and antenna gain than a conventional reflectarray antenna. The concept of OAM mode canceling in the near-field can contribute widely to a new type of low-profile, broad-reflection bandwidth, and high-gain antenna. Nature Publishing Group UK 2017-10-09 /pmc/articles/PMC5634501/ /pubmed/28993689 http://dx.doi.org/10.1038/s41598-017-13125-5 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Byun, Woo Jin Do Choi, Hyung Cho, Yong Heui Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
title | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
title_full | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
title_fullStr | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
title_full_unstemmed | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
title_short | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
title_sort | orbital angular momentum (oam) antennas via mode combining and canceling in near-field |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5634501/ https://www.ncbi.nlm.nih.gov/pubmed/28993689 http://dx.doi.org/10.1038/s41598-017-13125-5 |
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