Title :
Cusp gun TE/sub 21/ second-harmonic gyro-TWT amplifier
Author :
Harriet, S.B. ; McDermott, D.B. ; Luhmann, N.C., Jr.
Author_Institution :
Dept. of Appl. Sci., California Univ., Davis, CA, USA
Abstract :
A second harmonic cusp-gun TE/sub 21/ gyro-TWT amplifier is being constructed at UCD that is predicted to generate 50 kW at 30 GHz with 20% efficiency, 30 dB saturated gain and 3% bandwidth. The device is to be driven by a 70 kV, 3.5 A axis-encircling electron beam from a Northrop Grumman cusp gun. The device takes advantage of the concept that harmonic gyro-TWT´s are more stable and can produce higher power than at the fundamental-harmonic, because their weaker interaction yields a higher threshold electron current for the absolute instability at the cutoff of the operating mode.
Keywords :
electron guns; gyrotrons; harmonics; millimetre wave power amplifiers; millimetre wave tubes; travelling wave amplifiers; travelling wave tubes; 20 percent; 3.5 A; 30 GHz; 30 dB; 50 kW; 70 kV; TE/sub 21/ gyro-TWT amplifier; axis-encircling electron beam; cusp gun; efficiency; large-signal simulation; second harmonic gyro-TWT amplifier; stability; threshold electron current; Bandwidth; Circuits; Frequency; Insertion loss; Polarization; Power generation; Tellurium;
Conference_Titel :
Infrared and Millimeter Waves, 2002. Conference Digest. Twenty Seventh International Conference on
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-7423-1
DOI :
10.1109/ICIMW.2002.1076157
