Design and Experimental Study of a Widebandwidth W-Band Folded Waveguide Continuous-Wave TWT

Author

Yinfu Hu ; Jinjun Feng ; Jun Cai ; Xianping Wu ; Yinghua Du ; Jingkai Liu ; Ji Chen ; Xiaoqing Zhang

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Beijing Vacuum Electron. Res. Inst., Beijing, China

Volume

42

Issue

10

fYear

2014

fDate

Oct. 2014

Firstpage

3380

Lastpage

3386

Abstract

Design and development of a high power, wide-bandwidth W-band travelling wave tube (TWT) is presented in this paper. The design and simulation covers folded waveguide (FWG) circuit, electron gun, periodical permanent magnet system, and coupling window with the emphasis on the FWG optimization and particle-in-cell simulation by Computer Simulation Technology (CST) particle studio. Two TWT prototypes have been developed and tested, which demonstrate over 30-W output power in frequency between 91 and 101 GHz with over 30-dB saturated gain. Maximum power was found to be about 40 W around 95 GHz, while the flat output power curve under same drive level was observed.

Keywords

electron guns; permanent magnets; prototypes; travelling wave tubes; Computer Simulation Technology particle studio; FWG optimization; TWT prototypes; continuous-wave TWT; coupling window; electron gun; folded waveguide circuit; frequency 91 GHz to 101 GHz; particle-in-cell simulation; periodical permanent magnet system; widebandwidth W-band travelling wave tube; Bandwidth; Diamonds; Electron tubes; Impedance; Integrated circuit modeling; Oscillators; Power generation; Diamond; W-band; folded waveguide (FWG); travelling wave tubes (TWTs);

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2014.2350477

Filename

6895174