Study on W-band sheet-beam traveling-wave tube based on flat-roofed sine waveguide

A W-band sheet electron beam (SEB) traveling-wave tube (TWT) based on flat-roofed sine waveguide slow-wave structure (FRSWG-SWS) is proposed. The sine wave of the metal grating is replaced by a flat-roofed sine wave around the electron beam tunnel. The slow-wave characteristics including the dispers...

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Bibliographic Details
Published in:AIP advances 2018-05, Vol.8 (5), p.055116-055116-9
Main Authors: Fang, Shuanzhu, Xu, Jin, Jiang, Xuebing, Lei, Xia, Wu, Gangxiong, Li, Qian, Ding, Chong, Yu, Xiang, Wang, Wenxiang, Gong, Yubin, Wei, Yanyu
Format: Article
Language:English
Subjects:
Electron beams
Electrons
Impedance
Particle in cell technique
Simulation
Sine waves
Traveling wave tubes
Wave dispersion
Wave interaction
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Summary:A W-band sheet electron beam (SEB) traveling-wave tube (TWT) based on flat-roofed sine waveguide slow-wave structure (FRSWG-SWS) is proposed. The sine wave of the metal grating is replaced by a flat-roofed sine wave around the electron beam tunnel. The slow-wave characteristics including the dispersion properties and interaction impedance have been investigated by using the eigenmode solver in the 3-D electromagnetic simulation software Ansoft HFSS. Through calculations, the FRSWG SWS possesses the larger average interaction impedance than the conventional sine waveguide (SWG) SWS in the frequency range of 86-110 GHz. The beam-wave interaction was studied and particle-in-cell simulation results show that the SEB TWT can produce output power over 120 W within the bandwidth ranging from 90 to 100 GHz, and the maximum output power is 226 W at typical frequency 94 GHz, corresponding electron efficiency of 5.89%.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.5028300