Design and simulation studies of a Ka-band two-cavity gyro-twystron amplifier

V Veera Babu, Shyam Gopal Yadav, Smrity Dwivedi, and M Thottappan
Center of Research in Microwave Tubes (CRMT), Department of Electronics Engineering,
Indian Institute of Technology (BHU), Varanasi-221 005. India.
Dedicated to Prof B N Basu

In this paper, the behavior of 3D beam-wave interaction of a 35 GHz two-cavity gyro-twystron amplifier is studied using particle-in-cell (PIC) solver of CST Particle Studio. Modelling and beam-absent (cold simulation) study of the RF interaction structure is carried out to ensure the favorable propagation characteristics. The performance metrics of a two-cavity gyro-twystron is investigated in the presence of gyrating electron beam with velocity spread of around 4% . The PIC simulation of the amplifier predicted ~ 260 kW of peak output power at 35 GHz, operating in TE01 mode, with a gyrating electron beam of 68 kV potential carrying 9A of current. The power gain of the amplifier is calculated as ~ 57 dB and the conversion efficiency of ~ 42%. © Anita Publications. All rights reserved.
Keywords: Gyro-Twystron, Particle-in-cell simulation, PIC Simulation, Ka-band amplifier.

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Method: Single- anonymous; Screened for Plagiarism? Yes
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