Title :
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
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;
Conference_Titel :
Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International
Print_ISBN :
0-7803-8261-7
DOI :
10.1109/IVELEC.2004.1316293
