A high-efficiency ferruleless coupled-cavity traveling-wave tube with phase-adjusted taper

Author

Wilson, Jeffrey D. ; Limburg, Helen C. ; Davis, Jon A. ; Tammaru, Ivo ; Vaszari, John P.

Author_Institution

NASA Lewis Res. Center, Cleveland, OH, USA

Volume

37

Issue

12

fYear

1990

fDate

12/1/1990 12:00:00 AM

Firstpage

2638

Lastpage

2643

Abstract

The design and performance of the first traveling-wave tube (TWT) to be built with a phase-adjusted taper (PAT) is discussed. By adjusting the phase of the electron bunch with respect to the RF wave for strong electron bunch formation at the beginning of the taper and strong power conversion at the end, the PAT achieves a high efficiency of power conversion from the electron beam to the RF wave. A PAT incorporated into the output section of a baseline 29-30 GHz ferruleless coupled-cavity TWT experimentally increased the peak RF power from 420 to 1000 W and the peak RF interaction efficiency from 9.6 to 22.6%

Keywords

electron tube components; travelling-wave-tubes; 1000 W; 22.6 percent; 29 to 30 GHz; RF wave; TWT; design; electron bunch phase; ferruleless coupled-cavity traveling-wave tube; high efficiency; peak RF interaction efficiency; peak RF power; performance; phase-adjusted taper; strong electron bunch formation; strong power conversion; Aircraft; Coupling circuits; Electron beams; Electron tubes; Energy exchange; NASA; Nonlinear distortion; Optical coupling; Power conversion; Radio frequency;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.64546

Filename

64546