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.

Large-Signal Investigation of Cold and Hot Matched Coupled-Cavity Traveling-Wave Tubes

Frequenz ◽  
2014 ◽  
Vol 0 (0) ◽  
Author(s):  
Sascha Meyne ◽  
Jean-François David ◽  
Arne F. Jacob
Keyword(s):  
Traveling Wave ◽  
Characteristic Impedance ◽  
Matching Condition ◽  
Wave System ◽  
Small Signal ◽  
Large Signal ◽  
Beam Wave ◽  
Signal Approach ◽  
Traveling Wave Tubes ◽  
Coupled Cavity

AbstractThe implications of different matching conditions for coupled-cavity traveling-wave tubes are considered. Using a small-signal approach the characteristic impedance for the coupled (hot) beam-wave system is derived. It is taken as reference impedance to model ideal transformers and severs. This matching condition is compared to the standard cold match and both cases are analyzed using a large-signal interaction tool. The implications on input reflection and output gain are discussed.

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

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

scholarly journals Diverse Novel Stable Traveling Wave Solutions of the Advanced or Voltage Spectrum of Electrified Transmission Through Fractional Non-linear Model

2021 ◽  
Vol 9 ◽  
Author(s):  
Chen Yue ◽  
Li Wu ◽  
A. A. Mousa ◽  
Dianchen Lu ◽  
Mostafa M. A. Khater
Keyword(s):  
Traveling Wave ◽  
Electromagnetic Waves ◽  
Linear Time ◽  
Three Dimensional ◽  
Traveling Wave Solutions ◽  
Evolutionary Equations ◽  
Time Space ◽  
Different Types ◽  
Non Linear

This study analyzes the exact solutions of the compliance fractional non-linear time–space telegraph (FNLTST) equation by Oliver Heaviside in 1880 via three non-applied analytical schemes. The solutions obtained to define the advanced or voltage spectrum of electrified transmission with day-to-day distance from electrical communication or the application of electromagnetic waves. Many new solutions are obtained, and three distinct styles of drawings are introduced (two-dimensional, three-dimensional, and density plots). Furthermore, stability characterization of the solutions is addressed using the properties of the Hamiltonian system. The originality of this study is shown by matching the solutions built with solutions produced previously using various analytical methods. Overall, the success of the three systems demonstrates their quality, intensity, and capacity to cope with several different types of non-linear evolutionary equations.

scholarly journals Theoretical model and numerical simulation of three-dimensional multifrequency interaction of helix traveling wave tubes

2009 ◽  
Vol 58 (9) ◽  
pp. 6665
Author(s):  
Hu Yu-Lu ◽  
Yang Zhong-Hai ◽  
Li Jian-Qing ◽  
Li Bin ◽  
Gao Peng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Theoretical Model ◽  
Traveling Wave ◽  
Three Dimensional ◽  
Traveling Wave Tubes

A three-dimensional time-dependent theory for helix traveling wave tubes in beam-wave interaction

2011 ◽  
Vol 20 (2) ◽  
pp. 028401 ◽  
Author(s):  
Wei-Feng Peng ◽  
Yu-Lu Hu ◽  
Zhong-Hai Yang ◽  
Jian-Qing Li ◽  
Qi-Ru Lu ◽  
...  
Keyword(s):  
Traveling Wave ◽  
Three Dimensional ◽  
Wave Interaction ◽  
Time Dependent ◽  
Beam Wave ◽  
Dependent Theory ◽  
Traveling Wave Tubes ◽  
Beam Wave Interaction
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