High-Power 100 kW CW Q-Band Gyro-TWT: Performance and Stability
To satisfy the demand for high-power microwave sources, a Q-band 100 kW continuous-wave (CW) gyrotron traveling wave tube (gyro-TWT) is fabricated and experimentally demonstrated in this letter. The stability and uniformity of electron emission are greatly improved through the application of cathode coating thin-film technology. The power capacity of the device is assessed using efficient thermal management methods. Experimental results show that the gyro-TWT, driven by a 56 kV-7.9 A electron beam, achieves a maximum CW power of 115.6 kW, a gain of 54.9 dB, and an efficiency of 26.1% at 49.5 GHz. The device operates stably for a long time, with performance at the forefront of current technology.
Authors
- Jianxun Wang (ORCID: https://orcid.org/0000-0002-2330-4002)
- Yelei Yao (ORCID: https://orcid.org/0000-0002-4421-5965)
- Jianwei Zhou (ORCID: https://orcid.org/0009-0009-7209-7378)
- Qiang Zheng (ORCID: https://orcid.org/0000-0002-9279-7779)
- Boxin Dai (ORCID: https://orcid.org/0000-0001-8883-6272)
- Guo Liu (ORCID: https://orcid.org/0000-0001-6721-0289)
- Chaoxuan Lu (ORCID: https://orcid.org/0000-0001-7438-4922)
- Wei Jiang (ORCID: https://orcid.org/0000-0002-1252-0949)
- Yong Luo
- Yafen Shang
Institutions
- University of Electronic Science and Technology of China (CN)
Publication Details
- Journal
- IEEE Electron Device Letters
- Published
- 2025-03-24
- DOI
- https://doi.org/10.1109/led.2025.3553624
- Citations
- 2
- Primary Topic
- Gyrotron and Vacuum Electronics Research
- Type
- article
- Field-Weighted Citation Impact
- 2.49