Open AccessSimulation and design of a W-band second-harmonic gyrotron traveling wave amplifier
Author(s) -
Guosong Lai,
Pu-Kun Liu
Publication year - 2007
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.56.4515
Subject(s) - gyrotron , amplifier , physics , extremely high frequency , cathode ray , bandwidth (computing) , harmonic , rf power amplifier , optics , direct coupled amplifier , oscillation (cell signaling) , power (physics) , operational amplifier , electron , acoustics , computer science , optoelectronics , telecommunications , cmos , quantum mechanics , biology , genetics
Gyrotron traveling wave amplifier is a very important high power millimeter wave source for radar applications. Second-harmonic operation is of special significance due to its low magnetic field operation. By using an interaction circuit with two-stage distributed-loss, the absolute instability and the gyrotron backward wave oscillation can be suppressed. Nonlinear analysis is used to study the stability and large signal performance of the amplifier. Particle in cell simulation of W-band TE02 gyrotron traveling wave amplifier are also performed. The results show that this amplifier can generate 300 kW at 94 GHz with 15% efficiency and 5% bandwidth in case of a 100 kV, 20 A electron beam input.