Circuit design of a wideband W-band gyroklystron amplifier for radar applications

Author

Blank, Monica ; Danly, Bruce G. ; Levush, Baruch

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

426

Lastpage

432

Abstract

A high power W-band gyroklystron amplifier has been designed as the driver for a millimeter wave radar system currently under development at the Naval Research Laboratory. A time dependent, nonlinear theory was used to design the interaction circuit. Studies to determine the optimal stagger tuning and cavity Q values were performed. Circuit stability was investigated and the effect of beam parameter variation on circuit performance was also studied. The effects of mechanical tolerances and deviation of circuit dimensions from design values were examined. Simulations show that a four cavity circuit operating in the TE₀₁₁ mode at the fundamental of the cyclotron frequency can achieve 80.2 kW peak output power and 20.6% efficiency at a center frequency of 94.0 GHz with 740 MHz full width half maximum (FWHM) bandwidth for a 65 kV, 6 A electron beam

Keywords

circuit stability; gyrotrons; klystrons; microwave amplifiers; network synthesis; radar equipment; 20.6 percent; 6 A; 65 kV; 740 MHz; 80.2 kW; 94.0 GHz; Naval Research Laboratory; TE₀₁₁ mode; beam parameter variation; cavity Q values; center frequency; circuit design; circuit dimensions; circuit performance; circuit stability; cyclotron frequency; four cavity circuit; full width half maximum bandwidth; high power amplifier; interaction circuit; millimeter wave radar system; optimal stagger tuning; peak output power; radar applications; time dependent nonlinear theory; wideband W-band gyroklystron amplifier; Broadband amplifiers; Circuit optimization; Circuit synthesis; Driver circuits; Frequency; High power amplifiers; Klystrons; Laboratories; Millimeter wave circuits; Millimeter wave radar;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.700774

Filename

700774