Title :
A TE11 Ka-band gyro-TWT amplifier with high-average power compatible distributed loss
Author :
Pershing, Dean E. ; Nguyen, Khanh T. ; Calame, Jeffrey P. ; Danly, Bruce G. ; Levush, Baruch ; Wood, Franklin N. ; Garven, M.
Author_Institution :
Vacuum Electron. Branch, U.S. Naval Res. Lab., Washington, DC, USA
fDate :
6/1/2004 12:00:00 AM
Abstract :
Current amplifier research at the Naval Research Laboratory Vacuum Electronics Branch emphasizes techniques to extend the bandwidth and average power capability of gyro devices for millimeter wave radar applications. This paper will discuss the implementation of a wideband high-gain gyro-traveling wave tube amplifier design, with a measured peak output power of 78 kW, gain ∼60 dB, and a 3-dB bandwidth of 4.2 GHz (12%) at 52 kW in Ka-band. The 3-dB saturated bandwidth at 70 kW is 6 GHz (17%), which is also the instantaneous bandwidth with appropriately tailored input power (e.g., gain equalizer). The amplifier operates in the TE11 mode and for stabilization employs a high-average power compatible diffractive loading technique.
Keywords :
gyrotrons; millimetre wave power amplifiers; travelling wave amplifiers; travelling wave tubes; 3 dB; 4.2 GHz; 52 kW; 6 GHz; 70 kW; 78 kW; Ka-band gyro-TWT amplifier; TE11 mode; gyrodevices; high-average power compatible distributed loss; instantaneous bandwidth; millimeter wave amplifier; millimeter wave radar applications; wideband high-gain gyro-traveling wave amplifier design; Bandwidth; Broadband amplifiers; High power amplifiers; Laboratories; Millimeter wave measurements; Millimeter wave radar; Millimeter wave technology; Power amplifiers; Tellurium; Vacuum technology; Dielectric; gyro-TWT; gyro-traveling wave tube; loss; millimeter-wave amplifier;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2004.828823
