Title :
Linear and nonlinear analyses of a wideband gyro-TWT
Author :
Cheo, Bernard R. ; Rekiouak, Abdelkrim
Author_Institution :
Dept. of Electr. Eng., Polytechnic Univ., New York, NY, USA
fDate :
4/1/1989 12:00:00 AM
Abstract :
Linear and nonlinear analyses on a gyrotron amplifier with a periodically disk-loaded cylindrical waveguide circuit are performed. The dispersion relation of the circuit allows for wideband interaction with a relativistic beam of moderate power (Vb=60 kV, Ib=5 A). Linear analysis of the interaction with the fundamental mode shows a gain of the order of 50-60 dB/m over a bandwidth larger than 22% and a linear phase versus frequency characteristic. Nonlinear analysis predicts 48-kW saturated output power at 5.3 GHz with 18% efficiency. The saturation length for a 20-dB tube is about 37 cm
Keywords :
dispersion (wave); electron beams; gyrotrons; microwave amplifiers; travelling-wave-tubes; wideband amplifiers; 18 percent; 20 dB; 37 cm; 48 kW; 5 A; 5.3 GHz; 60 kV; SHF; cylindrical waveguide circuit; dispersion relation; fundamental mode; gyro-TWT; gyrotron amplifier; linear analysis; microwave tubes; nonlinear analysis; periodically disk-loaded; phase/frequency characteristic; relativistic beam; saturated output power; saturation length; wideband interaction; Bandwidth; Circuits; Dispersion; Electron beams; Frequency; Gyrotrons; Oscillators; Performance analysis; Power generation; Wideband;
Journal_Title :
Electron Devices, IEEE Transactions on
