Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical Cavity
Motivated by some emerging high-frequency applications, a high-power frequency-tunable sub-THz quasi-optical gyrotron cavity based on a confocal waveguide is designed in this paper. The frequency tuning characteristics of different approaches, including magnetic field tuning, mirror separation adjus...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/10/5/526 |
| _version_ | 1797395447062462464 |
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| author | Xiaotong Guan Jiayi Zhang Wenjie Fu Dun Lu Tongbin Yang Yang Yan Xuesong Yuan |
| author_facet | Xiaotong Guan Jiayi Zhang Wenjie Fu Dun Lu Tongbin Yang Yang Yan Xuesong Yuan |
| author_sort | Xiaotong Guan |
| collection | DOAJ |
| description | Motivated by some emerging high-frequency applications, a high-power frequency-tunable sub-THz quasi-optical gyrotron cavity based on a confocal waveguide is designed in this paper. The frequency tuning characteristics of different approaches, including magnetic field tuning, mirror separation adjustment, and hybrid tuning, have been investigated by particle-in-cell (PIC) simulation. Results predict that it is possible to realize a smooth continuous frequency tuning band with an extraordinarily broad bandwidth of 41.55 GHz, corresponding to a relative bandwidth of 18.7% to the center frequency of 0.22 THz. The frequency tunability is provided by varying the separation distance between two mirrors and correspondingly adjusting the external magnetic field. During the frequency tuning, the output power remains higher than 20 kW, which corresponds to an interaction efficiency of 10%. Providing great advantages in terms of broad bandwidth, smooth tuning, and high power, this research may be conducive to the development of high-power frequency-tunable THz gyrotron oscillators. |
| first_indexed | 2024-03-09T00:35:39Z |
| format | Article |
| id | doaj.art-98a2dac4fafc4a0d933c31af236c883d |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T00:35:39Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-98a2dac4fafc4a0d933c31af236c883d2023-12-11T18:11:51ZengMDPI AGElectronics2079-92922021-02-0110552610.3390/electronics10050526Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical CavityXiaotong Guan0Jiayi Zhang1Wenjie Fu2Dun Lu3Tongbin Yang4Yang Yan5Xuesong Yuan6School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, ChinaTerahertz Science and Technology Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 610054, ChinaTerahertz Science and Technology Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 610054, ChinaTerahertz Science and Technology Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 610054, ChinaTerahertz Science and Technology Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 610054, ChinaTerahertz Science and Technology Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 610054, ChinaTerahertz Science and Technology Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 610054, ChinaMotivated by some emerging high-frequency applications, a high-power frequency-tunable sub-THz quasi-optical gyrotron cavity based on a confocal waveguide is designed in this paper. The frequency tuning characteristics of different approaches, including magnetic field tuning, mirror separation adjustment, and hybrid tuning, have been investigated by particle-in-cell (PIC) simulation. Results predict that it is possible to realize a smooth continuous frequency tuning band with an extraordinarily broad bandwidth of 41.55 GHz, corresponding to a relative bandwidth of 18.7% to the center frequency of 0.22 THz. The frequency tunability is provided by varying the separation distance between two mirrors and correspondingly adjusting the external magnetic field. During the frequency tuning, the output power remains higher than 20 kW, which corresponds to an interaction efficiency of 10%. Providing great advantages in terms of broad bandwidth, smooth tuning, and high power, this research may be conducive to the development of high-power frequency-tunable THz gyrotron oscillators.https://www.mdpi.com/2079-9292/10/5/526gyrotronquasi-optical cavityconfocal waveguidefrequency tuninghigh powersub-millimeter wave |
| spellingShingle | Xiaotong Guan Jiayi Zhang Wenjie Fu Dun Lu Tongbin Yang Yang Yan Xuesong Yuan Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical Cavity Electronics gyrotron quasi-optical cavity confocal waveguide frequency tuning high power sub-millimeter wave |
| title | Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical Cavity |
| title_full | Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical Cavity |
| title_fullStr | Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical Cavity |
| title_full_unstemmed | Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical Cavity |
| title_short | Frequency Tuning Characteristics of a High-Power Sub-THz Gyrotron with Quasi-Optical Cavity |
| title_sort | frequency tuning characteristics of a high power sub thz gyrotron with quasi optical cavity |
| topic | gyrotron quasi-optical cavity confocal waveguide frequency tuning high power sub-millimeter wave |
| url | https://www.mdpi.com/2079-9292/10/5/526 |
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