Title :
Experimental investigation of W-band (93 GHz) gyroklystron amplifiers
Author :
Blank, Monica ; Danly, Bruce G. ; Levush, Baruch ; Pershing, D.E.
Author_Institution :
Vacuum Electron. Branch, Naval Res. Lab., Washington, DC, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
The results from W-band gyroklystron amplifier experiments are presented. Two circuit configurations, WGKL1 and WGKL2, have been demonstrated. The WGKL1 circuit achieved 67 kW peak output power, corresponding to 28% efficiency, for a 55-kV, 4.3-A electron beam. The full width half maximum (FWHM) bandwidth was measured to be 460 MHz, a significant increase over the bandwidth demonstrated in previous W-band gyroklystron experiments. The amplifier was unconditionally stable at the operating point. The WGKL2 circuit, which was designed to have a broader bandwidth, produced 60 kW peak output power at 25% efficiency with a 640 MHz FWHM bandwidth for a 58 kV, 4.2 A electron beam. The results from both experiments are compared with theory and good agreement is obtained
Keywords :
gyrotrons; klystrons; microwave amplifiers; 25 percent; 4.2 A; 4.3 A; 460 MHz; 55 kV; 58 kV; 60 kW; 640 MHz; 67 kW; 93 GHz; FWHM bandwidth; W-band gyroklystron amplifiers; WGKL1 circuit; WGKL2 circuit; circuit configurations; electron beam; full width half maximum; operating point; peak output power; Bandwidth; Circuits; Electron beams; Frequency; High power amplifiers; Klystrons; Millimeter wave radar; Power amplifiers; Power generation; Tellurium;
Journal_Title :
Plasma Science, IEEE Transactions on
