Technical talk on “Analytical Techniques to Variants of Disc-loaded Circular Waveguide for their Potential Application in Gyro-Travelling-Wave Tube”
IEEE Microwave Theory & Techniques Society (MTT-S) Student Branch Chapter (SBC) IIT BHU Varanasi has organized a technical talk on “Analytical Techniques to Variants of Disc-loaded Circular Waveguide for their Potential Application in Gyro-Travelling-Wave Tube” delivered by Dr. Vishal Kesari, Scientist, Microwave Tubes Research and Development Centre, Defence Research and Development Organisation at the Committee Room of Electronics Engineering Department IIT BHU at 10:45 Hrs on 18 August 2018 (Saturday). Dr Somak Bhattacharyya, MTT-S SBC advisor, gave a brief info of Dr. Kesari to the audience and invited him for a talk. Prof. B. N. Basu, an ex-Professor of IT (BHU) Varanasi had accompanied Dr. Kesari. Dr. Kesari along with Prof. Basu had written a book on Microwave Tubes which was dedicated to the Department. In the technical talk, Dr. Kesari mentioned issues related with Gyro-TWT and given fruitful solutions to the existing problems. He had huge interactions with the audience present over there. Faculty members from previously existing namely Dr. M. Thottappan and Dr. Smrity Dwivedi were also present during the talk to hail the efforts by Dr. Kesari. The talk ended around 12.30 Hours 18 August 2018.
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- Department of Electronics Engineering
- Indian Institute of Technology (BHU)
- Varanasi, Uttar Pradesh
- India 221005
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Dr. Vishal Kesari
Analytical Techniques to Variants of Disc-loaded Circular Waveguide for their Potential Application in Gyro-TWT
Biography:
Vishal Kesari received M. Sc. (Physics) degree from Veer Bahadur Sing Purvanchal University, India, and Ph. D. (Electronics Engineering) degree from Institute of Technology, Banaras Hindu University (IT-BHU) (now known as IIT-BHU), India, in 2001 and 2006, respectively. He has worked as Research Fellow at Centre of Advanced Study, Electronics Engineering Department, IT-BHU and significantly contributed to sponsored research projects at Centre of Research in Microwave Tubes, IT-BHU. He served as Lecturer at Birla Institute of Technology, Ranchi, India and Indian Institute of Information Technology, Allahabad, India before joining as Scientist at Microwave Tube Research and Development Centre, Defence Research and Development Organisation, Bengaluru, India. His research interest includes microwave and millimeter-wave vacuum electronic devices.
Dr. Kesari has developed innovatively loaded helical slow-wave structures, while characterizing them by non-resonant perturbation measurement, and compatible wideband RF input/output couplers for wideband TWTs for ship-borne/heli-borne EW systems. He has also evolved procedures for green TWT with multi-stage depressed collector to train it up to CW. Further, he has significantly contributed to the design and development of plethora of medium power, wideband, miniature helix TWTs resulting in the development of the miniature power booster TWTs which, in turn, combined with the concept of gain sharing between vacuum tube and solid-state devices, has led to the practical development of the MPMs for UAV/EW applications of DRDO. Based on electromagnetic analysis validated by simulation, he has also developed the novel concepts such as double-tapered disc-loaded waveguides and related variants for wideband gyro-TWTs for high-information-density communication and high-resolution radar. He has also designed and practically developed the sub-assemblies of mm-wave gyrotron for radars and active denial system.
He has authored two books: (i) Analysis of Disc-loaded Circular Waveguides for Wideband Gyro-TWTs (Lambert Academic Publishing AG & Co., Germany, 2009), and (ii) High Power Microwave Tubes: Basics and Trends (IOP Concise Physics; Morgan & Claypool Publishers, San Rafel, California, 2018 (with B. N. Basu as the co-author), and numerous research papers in peer-reviewed journals and conference proceedings. He has to his credit a number of international and departmental level awards including DRDO Young Scientist Award, 2012. He has acted as reviewers for various peer-reviewed journals (IEEE, Springer, Taylor and Francis, Elsevier, IET, Progress in Electromagnetic Research, etc.) and conference proceedings. He has been recognized as Golden Reviewer of IEEE Electron Device Letters for the years 2014 and 2015, and of IEEE Transactions on Electron Devices for the years 2014-2017. He is Fellow of Institution of Electronics and Telecommunication Engineers (IETE), India and Life Member of Vacuum Electronic Devices and Applications Society (VEDAS), India.