Title :
Experimental investigation of a broadband dielectric-loaded gyro-TWT amplifier
Author :
Leou, K.C. ; McDermott, D.B. ; Chong, C.K. ; Luhmann, N.C., Jr.
fDate :
6/1/1996 12:00:00 AM
Abstract :
The bandwidth of a gyrotron travelling wave amplifier has been broadened by incorporating a dielectric-loaded interaction waveguide to reduce the circuit´s dispersion. This proof-of-principle experiment was designed for the X-band frequency range and operates in the fundamental mode of a rectangular waveguide loaded with dielectric Macor. The amplifier is zero-drive stable and demonstrates a peak output power of 55 kW, 11% efficiency, 27 dB saturated gain with an unprecedented untapered gyro-TWT constant-drive bandwidth of 11% and a saturated bandwidth of 14%. Its performance can be further enhanced by reducing the beam´s axial velocity spread as shown by previous simulation studies
Keywords :
dielectric-loaded waveguides; electron tube testing; gyrotrons; microwave power amplifiers; microwave tubes; rectangular waveguides; travelling wave amplifiers; travelling wave tubes; wideband amplifiers; 11 percent; 27 dB; 55 kW; Macor; SHF tube; X-band frequency range; beam axial velocity spread reduction; broadband gyro-TWT amplifier; dielectric-loaded interaction waveguide; fundamental mode; gyrotron travelling wave amplifier; rectangular waveguide; zero-drive stable; Bandwidth; Broadband amplifiers; Circuits; Dielectrics; Frequency; Gyrotrons; Loaded waveguides; Power amplifiers; Power generation; Rectangular waveguides;
Journal_Title :
Electron Devices, IEEE Transactions on
