A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic Devices
In this paper, a compact circular waveguide directional coupler for high-order mode vacuum electronic devices is presented and investigated. To reduce the size, the primary and secondary waveguides of this coupler are connected in an orthogonal way by two coupling holes. Moreover, to improve the dir...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/13/3/633 |
| _version_ | 1797318877252681728 |
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| author | Tao Zhu Wenjie Fu Dun Lu Yibo Pan Chuannan Li Lin He Haoxuan Sun Yang Yan |
| author_facet | Tao Zhu Wenjie Fu Dun Lu Yibo Pan Chuannan Li Lin He Haoxuan Sun Yang Yan |
| author_sort | Tao Zhu |
| collection | DOAJ |
| description | In this paper, a compact circular waveguide directional coupler for high-order mode vacuum electronic devices is presented and investigated. To reduce the size, the primary and secondary waveguides of this coupler are connected in an orthogonal way by two coupling holes. Moreover, to improve the directivity and operating bandwidth, a method of loading adjustable metal stubs on the isolating port is proposed and introduced in design. A Ka-band TE01-mode circular waveguide directional coupler was designed, and the structure parameters were optimized by electromagnetic simulation. To verify the design, a prototype sample was fabricated, assembled, and tested. The experimental results show good agreement with the simulations, and the directivity are improved by adjusting the metal stubs on the isolating port. In the experiment, a 26.7 dB directivity at 35 GHz was obtained, and the bandwidth of directivity above 20 dB was higher than 7 GHz, corresponding to a relative bandwidth higher than 20%. Meanwhile, the TE01° mode maintained good transmission efficiency in this compact high-order mode directional coupler. |
| first_indexed | 2024-03-08T03:58:46Z |
| format | Article |
| id | doaj.art-8511a3946b844c3596177387e76a295a |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-08T03:58:46Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-8511a3946b844c3596177387e76a295a2024-02-09T15:10:54ZengMDPI AGElectronics2079-92922024-02-0113363310.3390/electronics13030633A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic DevicesTao Zhu0Wenjie Fu1Dun Lu2Yibo Pan3Chuannan Li4Lin He5Haoxuan Sun6Yang Yan7School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, ChinaIn this paper, a compact circular waveguide directional coupler for high-order mode vacuum electronic devices is presented and investigated. To reduce the size, the primary and secondary waveguides of this coupler are connected in an orthogonal way by two coupling holes. Moreover, to improve the directivity and operating bandwidth, a method of loading adjustable metal stubs on the isolating port is proposed and introduced in design. A Ka-band TE01-mode circular waveguide directional coupler was designed, and the structure parameters were optimized by electromagnetic simulation. To verify the design, a prototype sample was fabricated, assembled, and tested. The experimental results show good agreement with the simulations, and the directivity are improved by adjusting the metal stubs on the isolating port. In the experiment, a 26.7 dB directivity at 35 GHz was obtained, and the bandwidth of directivity above 20 dB was higher than 7 GHz, corresponding to a relative bandwidth higher than 20%. Meanwhile, the TE01° mode maintained good transmission efficiency in this compact high-order mode directional coupler.https://www.mdpi.com/2079-9292/13/3/633vacuum electronic devices (VEDs)high-order modecircular waveguidedirectional couplerKa-band |
| spellingShingle | Tao Zhu Wenjie Fu Dun Lu Yibo Pan Chuannan Li Lin He Haoxuan Sun Yang Yan A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic Devices Electronics vacuum electronic devices (VEDs) high-order mode circular waveguide directional coupler Ka-band |
| title | A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic Devices |
| title_full | A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic Devices |
| title_fullStr | A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic Devices |
| title_full_unstemmed | A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic Devices |
| title_short | A Compact Circular Waveguide Directional Coupler for High-Order Mode Vacuum Electronic Devices |
| title_sort | compact circular waveguide directional coupler for high order mode vacuum electronic devices |
| topic | vacuum electronic devices (VEDs) high-order mode circular waveguide directional coupler Ka-band |
| url | https://www.mdpi.com/2079-9292/13/3/633 |
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