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Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT
The rectangular gyrotron traveling wave tube (gyro-TWT) with a large aspect ratio (α) has the potential to achieve megawatt-class output power. As an essential component of gyro-TWT, a novel overmoded Ka-band mode converter with an α of 6.19 is designed, analyzed, and cold tested in this paper. Base...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9322619/ https://www.ncbi.nlm.nih.gov/pubmed/35888928 http://dx.doi.org/10.3390/mi13071111 |
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author | Lu, Chaoxuan Jiang, Wei Wu, Zewei Liu, Guo Wang, Jianxun Pu, Youlei Luo, Yong |
author_facet | Lu, Chaoxuan Jiang, Wei Wu, Zewei Liu, Guo Wang, Jianxun Pu, Youlei Luo, Yong |
author_sort | Lu, Chaoxuan |
collection | PubMed |
description | The rectangular gyrotron traveling wave tube (gyro-TWT) with a large aspect ratio (α) has the potential to achieve megawatt-class output power. As an essential component of gyro-TWT, a novel overmoded Ka-band mode converter with an α of 6.19 is designed, analyzed, and cold tested in this paper. Based on the magnetic dipole moment theory, the rectangular overmoded TE(01) mode is excited via the rectangular fundamental TE(10) mode. The cutoff waveguide is applied to prevent electromagnetic wave transport to the magnetron injection gun (MIG) region and also guarantee higher power electron beam transportation. Simulations predict an operation bandwidth higher than 4 GHz and greater than 99.8% mode purity between 33–37 GHz. To verify this design, the mode converter is manufactured and cold tested. The back-to-back measurement results exhibit a good agreement with the simulation. With similar topologies, the rectangular overmoded TE(01) mode can be excited in a different α. |
format | Online Article Text |
id | pubmed-9322619 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-93226192022-07-27 Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT Lu, Chaoxuan Jiang, Wei Wu, Zewei Liu, Guo Wang, Jianxun Pu, Youlei Luo, Yong Micromachines (Basel) Article The rectangular gyrotron traveling wave tube (gyro-TWT) with a large aspect ratio (α) has the potential to achieve megawatt-class output power. As an essential component of gyro-TWT, a novel overmoded Ka-band mode converter with an α of 6.19 is designed, analyzed, and cold tested in this paper. Based on the magnetic dipole moment theory, the rectangular overmoded TE(01) mode is excited via the rectangular fundamental TE(10) mode. The cutoff waveguide is applied to prevent electromagnetic wave transport to the magnetron injection gun (MIG) region and also guarantee higher power electron beam transportation. Simulations predict an operation bandwidth higher than 4 GHz and greater than 99.8% mode purity between 33–37 GHz. To verify this design, the mode converter is manufactured and cold tested. The back-to-back measurement results exhibit a good agreement with the simulation. With similar topologies, the rectangular overmoded TE(01) mode can be excited in a different α. MDPI 2022-07-15 /pmc/articles/PMC9322619/ /pubmed/35888928 http://dx.doi.org/10.3390/mi13071111 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lu, Chaoxuan Jiang, Wei Wu, Zewei Liu, Guo Wang, Jianxun Pu, Youlei Luo, Yong Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT |
title | Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT |
title_full | Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT |
title_fullStr | Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT |
title_full_unstemmed | Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT |
title_short | Design and Measurement of a Novel Overmoded TE(01) Mode Converter for a Rectangular Gyro-TWT |
title_sort | design and measurement of a novel overmoded te(01) mode converter for a rectangular gyro-twt |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9322619/ https://www.ncbi.nlm.nih.gov/pubmed/35888928 http://dx.doi.org/10.3390/mi13071111 |
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