Three-dimensional nonlinear theory of helix traveling-wave tubes

2000 ◽  
Vol 28 (3) ◽  
pp. 748-759 ◽  
Author(s):  
H.P. Freund
Keyword(s):  
Nonlinear Theory ◽  
Traveling Wave ◽  
Three Dimensional ◽  
Traveling Wave Tubes

Design of coaxial and waveguide couplers for helix TWT

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mukesh Kumar Alaria ◽  
Sanjay Kumar Ghosh
Keyword(s):  
Traveling Wave ◽  
Return Loss ◽  
Characteristic Impedance ◽  
Three Dimensional ◽  
Waveguide Coupler ◽  
Quarter Wavelength ◽  
Different Types ◽  
Waveguide Type ◽  
Transformer Design ◽  
Traveling Wave Tubes

Abstract In this paper, two types of coaxial coupler and waveguide coupler for different frequency helix traveling wave tubes (TWTs) are designed, fabricated and cold tested. The coaxial coupler includes of window ceramic and RF transformer section. At present multi-section impedance transformer design approach is used for wideband helix TWTs. In any helix TWT, impedance of the source is transformed to the characteristic impedance of helix. This is done by the quarter-wavelength (λ/4) impedance transformation approach. The simulated results of different types of couplers are carried out by HFSS and CST microwave studio software and compare with experimental results. Three-dimensional electromagnetic field simulators allowing the any geometry with port excitations it is possible to model the complex coaxial and waveguide type couplers with helix SWS assembly and predict its desired return loss performances.

scholarly journals Calculations of three-dimensional frequency-domain nonlinear beam-wave reaction for helix traveling wave tubes

2009 ◽  
Vol 58 (5) ◽  
pp. 3118
Author(s):  
Hao Bao-Liang ◽  
Xiao Liu ◽  
Liu Pu-Kun ◽  
Li Guo-Chao ◽  
Jiang Yong ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Traveling Wave ◽  
Three Dimensional ◽  
Nonlinear Beam ◽  
Beam Wave ◽  
Traveling Wave Tubes

A three-dimensional multifrequency large signal model for helix traveling wave tubes

2001 ◽  
Vol 48 (1) ◽  
pp. 3-11 ◽  
Author(s):  
D. Chernin ◽  
T.M. Antonsen ◽  
B. Levush ◽  
D.R. Whaley
Keyword(s):  
Traveling Wave ◽  
Three Dimensional ◽  
Large Signal ◽  
Signal Model ◽  
Traveling Wave Tubes

Nonlinear theory of collective effects in helix traveling wave tubes

1997 ◽  
Vol 4 (6) ◽  
pp. 2292-2301 ◽  
Author(s):  
H. P. Freund ◽  
E. G. Zaidman
Keyword(s):  
Nonlinear Theory ◽  
Traveling Wave ◽  
Collective Effects ◽  
Traveling Wave Tubes

3-D Nonlinear Theory for Sheet-Beam Folded-Waveguide Traveling-Wave Tubes

2018 ◽  
Vol 65 (11) ◽  
pp. 5103-5110 ◽  
Author(s):  
Fengying Lu ◽  
Manfred Grieser ◽  
Changing Zhang ◽  
Yong Wang
Keyword(s):  
Nonlinear Theory ◽  
Traveling Wave ◽  
Folded Waveguide ◽  
Traveling Wave Tubes

A three-dimensional nonlinear beam–wave interaction theory for common traveling wave tubes

2015 ◽  
Vol 29 (16) ◽  
pp. 2178-2190 ◽  
Author(s):  
Weizhong Yan ◽  
Yulu Hu ◽  
Yunxian Tian ◽  
Weifeng Peng ◽  
Jianqing Li ◽  
...  
Keyword(s):  
Traveling Wave ◽  
Three Dimensional ◽  
Wave Interaction ◽  
Interaction Theory ◽  
Nonlinear Beam ◽  
Beam Wave ◽  
Traveling Wave Tubes ◽  
Beam Wave Interaction

Time-dependent nonlinear theory and numerical simulation of folded waveguide traveling wave tubes

2013 ◽  
Vol 62 (6) ◽  
pp. 949-953 ◽  
Author(s):  
Wei Feng Peng ◽  
Zhong Hai Yang ◽  
Yu Lu Hu ◽  
Zan Cao ◽  
Yin-Fu Hu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Nonlinear Theory ◽  
Traveling Wave ◽  
Time Dependent ◽  
Folded Waveguide ◽  
Traveling Wave Tubes
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