Design and Development of Helix Slow-Wave Structure for Ku-Band TWT

A helix slow-wave structure (SWS) for a high-efficiency (electronic efficiency >; 25%) Ku-band 140-W space traveling-wave tube (TWT) has been designed. The cold circuit parameters of helix SWS, like propagation constant and on-axis interaction impedance, were determined using 3-D electromagnetic...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2011-01, Vol.39 (1), p.550-554
Main Authors: Alaria, Mukesh Kumar, Bera, Anirban, Sharma, R K, Srivastava, Vishnu
Format: Article
Language:English
Subjects:
Assembly
Circuits
Couplers
Dispersion
Electromagnetic fields
Electromagnetism
Electron tubes
Electronics
Experiments
Flight simulators
Gain
helix slow-wave structure (SWS)
Impedance
Integrated circuit modeling
interaction impedance
Propagation constant
Radio frequencies
Radio frequency
Simulation
Traveling wave tubes
traveling-wave tube (TWT)
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Summary:A helix slow-wave structure (SWS) for a high-efficiency (electronic efficiency >; 25%) Ku-band 140-W space traveling-wave tube (TWT) has been designed. The cold circuit parameters of helix SWS, like propagation constant and on-axis interaction impedance, were determined using 3-D electromagnetic field simulators ANSOFT-HFSS and CST-MWS, and those were validated with the experimental results. The in-house developed large-signal code SUNRAY-1D was used to design a complete helix SWS in two sections with sever and taper to achieve desired output power, gain, efficiency, and other linearity parameters like phase shift, AM/PM factor, and I/M components. The simulated RF performance of the Ku-band 140-W helix TWT was validated with the experimental results. A close agreement between the simulated and experimental results has been found.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2010.2089701