Design and simulation study of double side-cavity gridless reltron with dual extraction sections

Abstract

Reltron is a high power microwave (HPM) oscillator with many attractive features. Here, we report a computer-aided design and simulation-based study of a double side-cavity (DSC) gridless reltron, which is an advancement of the conventional reltron. Commercially available software package CST Microwave Studio (MWS) has been used for the device simulation. The modulation section has been designed and studied by obtaining the S-parameters. From the electromagnetic (EM) field patterns and the frequencies of normal modes, we identify an extra mode in a DSC reltron, in addition to the three normal modes of a conventional reltron – (0, $\pi /2$, and π). Furthermore, the whole device has been modeled and simulated using particle in cell (PIC) solver to study the device performance under different post acceleration (PA) potentials. The use of the dual extraction section results in a peak efficiency of 38.6%.

Keywords:

• High power microwave (HPM)
• particle-in-cell (PIC) simulation
• microwave tubes
• reltron

Acknowledgments

The authors wish to thank Prof. P. K. Jain, presently the director of NIT Patna, India for, guidance and technical discussions. Author S. Shee also acknowledges Mr. Prabhakar Tripathi, Research Scholar, Dept. of Electronics Engineering, IIT (BHU), Varanasi, for various technical discussions.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Soumojit Shee

Soumojit Shee (Student Member, IEEE) received the BE degree in electronics and communication engineering from the University Institute of Technology, Bardhaman, India, and the MTech degree in electronics and communication engineering (microwaves) from the University of Burdwan, Bardhaman, in 2008 and 2011, respectively. He is currently pursuing the PhD degree with IIT (BHU) Varanasi, Varanasi, India. He has worked as a Project Trainee with the Microwave Tube Research and Development Center (MTRDC), Bangalore, India. In 2012, he joined the Department of Electronics and Communication Engineering, ITER: Faculty of Engineering and Technology, Siksha ‘O’ Anusandhan University, Bhubaneswar, India, as an Assistant Professor, where he is currently on leave. He was the Treasurer of the IEEE MTT-S Student Branch Chapter (SBC), IIT (BHU), from 2018 to 2019, where he is currently acting as the Vice-Chairman. His research interest includes highpower microwave tubes, mode converters, high-power antennas, and microwave passive devices.

Smrity Dwivedi

Smrity Dwivedi (Senior Member, IEEE) received the BTech degree in electronics and communication engineering from Uttar Pradesh Technical University, Lucknow, India, in 2005, and the PhD degree from IIT (BHU) Varanasi, Varanasi, India, in 2013. In 2017, she joined the Department of Electronics Engineering, IIT (BHU) Varanasi, as an Assistant Professor. Her current research interests include the modeling, simulation, and design of high-power microwave source, conventional vacuum electronics devices, metamaterial-based applications, plasmonics, and smart antennas for the new generation.