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

Volume

26

Issue

3

fYear

1998

fDate

6/1/1998 12:00:00 AM

Firstpage

409

Lastpage

415

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;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.700772

Filename

700772