Title :
Experimental demonstration of W-band gyroklystron amplifiers with improved gain and efficiency
Author :
Blank, Monica ; Danly, Bruce G. ; Levush, Baruch
Author_Institution :
Commun. & Power Ind., Palo Alto, CA, USA
fDate :
6/1/2000 12:00:00 AM
Abstract :
The experimental demonstrations of two W-band gyroklystron amplifiers are reported. A four-cavity amplifier operating near 93 GHz achieved 84-kW peak output power and 34% efficiency for a 56-kV 1.4-A electron beam. The measured full-width at half maximum (FWHM) bandwidth was 370 MHz. A five-cavity gyroklystron amplifier produced 72-kW peak output power and 27% efficiency with 410-MHz FWHM bandwidth centered at 93.4 GHz with 50-dB saturated gain. Both amplifiers were zero-drive stable at the operating points. The results from both experiments are compared with theory and good agreement is obtained.
Keywords :
gyrotrons; klystrons; millimetre wave amplifiers; 27 percent; 370 MHz; 4.4 A; 410 MHz; 50 dB; 56 kV; 72 kW; 84 kW; 93 GHz; 93.4 GHz; FWHM bandwidth; W-band gyroklystron amplifiers; efficiency; five-cavity gyroklystron amplifier; four-cavity amplifier; full-width at half maximum bandwidth; millimetre wave amplifiers; operating points; peak output power; zero drive stable amplifiers; Bandwidth; Electron beams; Frequency; High power amplifiers; Klystrons; Magnetic resonance imaging; Power amplifiers; Power generation; Pulse amplifiers; Tellurium;
Journal_Title :
Plasma Science, IEEE Transactions on
