Open AccessTheory and simulation of the folded waveguide traveling-wave tube working in low voltage with changed period and big size
Author(s) -
Quan Hu
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.014101
Subject(s) - traveling wave tube , electrical impedance , waveguide , harmonic , coupling (piping) , voltage , dispersion (optics) , tube (container) , optics , materials science , acoustics , physics , optoelectronics , amplifier , cmos , quantum mechanics , composite material , metallurgy
The folded waveguide traveling-wave tube which works at 3 mm band and above the band is limited to machining accuracy and power capacity. So a slow-wave folded waveguide structure which has a finite number of cycles and whose period can be changed nonasymptotically is proposed. Firstly, the theory for effectively increasing the high-order space harmonic coupling impedance of the structure is given. And the expressions for dispersion and coupling impedance are derived. Then through the simulation, a set of optimized design parameters is achieved. Thus the operating point of the traveling-wave tube is determined. Finally, it is simulated by MAFIA. And an effective gain is obtained. The traveling-wave tube which works at low voltage, relatively large size and relatively large period, is designed.