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ABSTRACT
In this paper, the effect of backward wave oscillation (BWO) on helix slow wave structure performance for TWT has been described. In this paper both the cases tapered and untapered helix slow wave structure (SWS) have been analyzed, caused by BWO for high gain helix TWT. In house developed the one-dimensional (SUNRAY-1D) large signal analysis model has been used for stability analysis of the helix SWS. The analysis on backward wave amplifier gain has been carried out as a function of the taper parameter and frequency parameter. The position and nature of tapering also affect the electronic efficiency as well as the start oscillation current. Hence, position and nature of tapering have been optimized.
Acknowledgements
The authors are thankful to the Director, CSIR-CEERI, Pilani, for his kind permission to publish this paper.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Mukesh Kumar Alaria
MK Alaria received the M.Tech degree from Delhi University, India, in 2003 and Ph.D. from DAVV, Indore, India, in 2015. He is currently a Sr. Scientist in Microwave Devices Area, Central Electronics Engineering Research Institute (Council of Scientific and Industrial Research) Pilani, Rajasthan, India. His major field of research is microwave tubes, MW applications, and mathematical modeling and simulation, in general, and TWT and gyro-devices, in particular. He has authored/coauthored more than 100 research papers in peer-reviewed journals and conferences. He is a senior member of IEEE and a member of the IETE Society.
S. K. Ghosh
SK Ghosh received his M. Sc. in physics and PhD in Microwave Engineering both from Banaras Hindu University, Varanasi, India in 1992 and 1996, respectively. At present he is principal scientist in the area of Microwave Devices Area, Central Electronics Engineering Research Institute (CEERI) (Council of Scientific and Industrial Research (CSIR)), Pilani, India, and also Assoc. Prof. in Academy of Scientific and Innovative Research (AcSIR). Before joining CEERI, he was associated with Bharat Electronics Limited (BEL), Bangalore, India. There, he was associated with design, development and production of various microwave tubes. He has published several research papers in monographs, peer reviewed journals and conference proceedings. His current are of interest is modeling, design and development of TWTs for broadband, high efficiency and high frequency applications.