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

fYear

2009

fDate

28-30 April 2009

Firstpage

127

Lastpage

128

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IVELEC.2009.5193391

Filename

5193391