Backward-wave oscillation in high power broadband helical traveling wave tube | Zendy

Yulu Hu | Zendy; Yang Zhong-hai | Zendy; Bin Li | Zendy; JianQing Li | Zendy; Tao Huang | Zendy; Jin Xiaolin | Zendy; Zhu Xiaofang | Zendy; Liang Xian-Pu | Zendy

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Backward-wave oscillation in high power broadband helical traveling wave tube

Author(s) -

Yulu Hu,

Yang Zhong-hai,

Bin Li,

JianQing Li,

Tao Huang,

Jin Xiaolin,

Zhu Xiaofang,

Liang Xian-Pu

Publication year - 2010

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.59.5439

Subject(s) - oscillation (cell signaling) , physics , traveling wave tube , backward wave oscillator , beam (structure) , broadband , optics , power (physics) , space charge , nonlinear system , magnetic field , tube (container) , signal (programming language) , computational physics , cathode ray , electron , materials science , optoelectronics , amplifier , genetics , cmos , quantum mechanics , computer science , biology , programming language , composite material

A 2D nonlinear beam-wave interaction is built to simulate the backward-wave oscillation(BWO) in a Helical traveling wave tube, based on the 1D beam-wave interaction model by taking into account the angular speed which is affected by magnetic field. The normalized oscillation start-up length with different space charge parameter is compared with that obtained from a equivalent circuit model in small signal, showing that they are close to each other. Also, the simulated results are in accordance with the measurements in a 8—18 GHz Helical TWT. The factors affecting the BWO are studied, by which some methods to suppress the BWO are improved.

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