Experimental investigation and design of sectoral waveguide TM₀₁ to TE₁₁ mode converter

Abstract

In this paper, an all-metal sectoral waveguide (SWG) mode converter has been proposed for TM₀₁ to TE₁₁ mode conversion, suitable for high-power application with high mode conversion efficiency and beam stability. Describing its operating principle, electromagnetic (EM) analysis has been carried out to observe the propagation behaviour in the different structure regions of the mode converter. A comprehensive design methodology, experimental investigation along with its beam stability performance has been presented. This design methodology has been typically demonstrated for 2.9–3.1 GHz frequency device; the performance of the designed device has been carried out using a commercial simulation code. To validate our design methodology and simulation, the results have been compared with experimental results and found in agreement. The proposed SWG mode converter has exhibited high conversion efficiency (98.4%) along with EM beam stability, suiting for the high-power applications.

Keywords:

• Sectoral waveguide
• SWG mode converter
• HPM mode converter
• mode converter
• high-power microwave

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Vikram Kumar

Vikram Kumar received the BSc. Engineering degree in electronics and communication engineering from Magadh University, Bodh Gaya, India, in 2008, and M.E. degree from Birla Institute of Technology Mesra, Ranchi, India, in 2011. He has been with Indian Institute of Technology (BHU), Varanasi, India since 2014 where he is pursuing Ph.D. His research interests include HPM mode converter and antennas.

Smrity Dwivedi

Smrity Dwivedi received the B.Tech. degree in electronics and communication engineering, from U.P. Technical University, Lucknow, India and a Ph.D. degree from IIT (BHU), Varanasi, India in 2012. She has been with Indian Institute of Technology (BHU) Varanasi, India since 2017. Her research interests include conventional and high-power microwave tubes, microwave antennas and MMICs.

P. K. Jain

P. K. Jain received the B.Tech., M.Tech. and Ph.D. degrees from Institute of Technology BHU, Varanasi, India, in 1979, 1981 and 1988, respectively. He has been with Indian Institute of Technology (BHU) Varanasi, India since 1981. Currently, he is deputed as a Director of National Institute of Technology, Patna, India. He has made a significant contribution in the areas of analysis, modelling, and development of high-power microwave tubes and gyrotron devices. His research interests include vacuum devices, HPM devices, mode converters and microwave imaging.