20.6: Design and development of 100 GHz folded waveguide TWT

In the recent decade there has been a growing interest of the researchers all over the world in the design and development of the high frequency (in terahertz range), moderate power and efficient devices based on MEMS (semiconductor) and vacuum electronics technologies. Development of so-called vacuum microelectronic devices (VMDs) for the mm and sub-mm wave devices surmount the limitations of conventional microwave tubes (MWTs) as well as of solid-state devices. CEERI has started work towards the design and development of Folded wave guide TWT (FWTWT) initially for 100 GHz. This paper would report design and development work done for electron gun and RF structure of 100 GHz FWTWT.