Title :
Design of an overmoded W-band TWT
Author :
Comfoltey, E. Nicholas ; Shapiro, Michael A. ; Sirigiri, Jagadishwar R. ; Temkin, Richard J.
Author_Institution :
MIT Plasma Sci. & Fusion Center, Cambridge, MA, USA
Abstract :
We report on the design and cold test validation of an overmoded TWT capable of producing power in excess of 100 Watts in the W-band and above. The TWT operates in the TM31 mode of a rectangular cavity and has transverse dimensions three times larger than a conventional ladder TWT. Dielectric loading of a resonant cavity was utilized to suppress lower order modes and prevent parasitic oscillations. HFSS and MAGIC3D codes were used to predict performance. An X-Ku band scaled down version of the interaction structure was built and cold tests performed on it showed excellent agreement with HFSS simulations.
Keywords :
cavity resonators; computational electromagnetics; microwave propagation; travelling wave tubes; Ku band; X band; delectric loading; overmoded W-band travelling wave tube; resonant cavity; Circuit simulation; Circuit testing; Coupling circuits; Dielectric losses; Electron beams; Frequency; Impedance; Performance evaluation; Power generation; Resonance; MAGIC3D; TWT; W-Band; ladder circuit; overmoded;
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
DOI :
10.1109/IVELEC.2009.5193391
