Experimental measurements and field modeling for a W-band window

Author

Earley, Lawrence ; Smirnova, Evgenya ; Ferguson, Patrick

Author_Institution

Los Alamos Nat. Lab., NM, USA

fYear

2004

fDate

27-29 April 2004

Firstpage

244

Lastpage

245

Abstract

An alumina ceramic window was designed and built for the LANL 94 GHz traveling-wave tube amplifier. The window is housed in a cylindrical pillbox cavity and connects to WR-10 waveguide on both input and output. It was designed for low duty operation at the 100 W level. The initial design of the window was performed with the program CASCADE. The transmission through the window was calculated and the window and cylindrical resonator dimensions were optimized for power transmission at 94 GHz and 2 GHz bandwidth. The design was later verified with the code HFSS. Four prototype windows were fabricated and tested.

Keywords

alumina; ceramics; computational electromagnetics; microwave materials; millimetre wave tubes; tolerance analysis; travelling wave amplifiers; travelling wave tubes; 2 GHz; 94 GHz; Al₂O₃; CASCADE code; HFSS code; VSWR curves; W-band window; alumina ceramic window; cylindrical pillbox cavity; cylindrical resonator dimensions; dimensional tolerance; field modeling; low duty operation; transmission curve; traveling wave tube amplifier; vacuum brazed; welded windows; window design; Bandwidth; Ceramics; Fabrication; Fixtures; Frequency; Laboratories; Power transmission; Prototypes; Springs; Welding;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International

Print_ISBN

0-7803-8261-7

Type

conf

DOI

10.1109/IVELEC.2004.1316293

Filename

1316293