W-Band 1-kW Staggered Double-Vane Traveling-Wave Tube

Author

Lai, Jianqiang ; Gong, Yubin ; Xu, Xiong ; Wei, Yanyu ; Duan, Zhaoyun ; Wang, Wenxiang ; Feng, Jinjun

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

Volume

59

Issue

2

fYear

2012

Firstpage

496

Lastpage

503

Abstract

A design study for a W-band traveling-wave tube (TWT) using a staggered double-vane slow-wave structure combined with a sheet electron beam shows that an output power of over 1 kW should be possible. Numerical eigenmode calculations indicated that the structure has a strong longitudinal component of electric field for interaction with the electron beam. A novel input and output coupler was proposed that can produce good input and output matches. Finally, a TWT model with moderate dimensions was established. The particle-in-cell simulation results revealed that the tube can be expected to produce over 1 kW of peak power in the range from 90 to 95 GHz, assuming an RF input signal with a peak power of 0.15 W and a beam power of 10.3 kW. The corresponding conversion efficiency values vary from 9.87% to 12.15%, and the maximum gain is 39.2 dB at 93 GHz.

Keywords

eigenvalues and eigenfunctions; electron beams; travelling wave tubes; W band traveling wave tube; eigenmode calculations; electric field; output coupler; peak power; power 0.15 W; power 1 kW; power 10.3 kW; sheet electron beam; slow wave structure; staggered double vane traveling wave tube; Attenuators; Couplers; Electron tubes; Gain; Oscillators; Radio frequency; Simulation; Coupler; W-band; sheet beam; slow-wave structure (SWS); staggered double vane; traveling-wave tube (TWT);

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2011.2174458

Filename

6096397