Title :
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
fDate :
12/1/1990 12:00:00 AM
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;
Journal_Title :
Electron Devices, IEEE Transactions on
