Design and analysis of a hundred-watt G-band traveling wave tube
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2024-11-01 |
| Journal | Physics of Plasmas |
| Authors | Hongjing Li, Wenxin Liu, Zhiqiang Zhang, Kedong Zhao, Zhihao Jin |
| Institutions | Aerospace Information Research Institute, Beihang University |
| Citations | 1 |
Abstract
Section titled āAbstractāIn this paper, a hundred-watt level traveling wave tube operating in the G-band is designed and analyzed. A non-semi-arc folded waveguide (FW) slow wave structure (SWS) is adopted to achieve high output power. Compared with the conventional FW, this structure has a higher coupling impedance, which is beneficial for beam-wave interaction. To further improve the efficiency of beam-wave interaction, phase velocity taper technology is adopted in SWS. A diamond pill-box output window is designed for electromagnetic wave input and output in SWS. In addition, the electron optics including a Pierce electron gun and a periodic permanent magnet focusing system are designed for emitting and constraining the electron beam. Using CST PIC solver for simulation, the results show that under a 23 kV and 80 mA electron beam, the maximum output power of the SWS is 132.7 W and the saturated gain is 36.5 dB. The bandwidth for output power greater than 100 W is 12 GHz. A pill-box window is designed and fabricated, and experimentally measured S11 is better than ā13 dB and S21 is better than ā1.3 dB in 213-229.5 GHz. The electron optics generate 79 mA current at 23 kV voltage.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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