Title :
Operation of a Ka-band Harmonic-Multiplying Gyrotron Traveling-Wave Tube
Author :
Luo, Jirun ; Jiao, Chongqing ; Luan, Yuantao ; Yuan, Guangjiang ; Guo, Wei ; Zhu, Min ; Zhang, Yansheng
Author_Institution :
Inst. of Electron., Chinese Acad. of Sci., Beijing, China
Abstract :
Amplification studies of a Ka-band harmonic-multiplying gyrotron traveling-wave tube (gyro-TWT) are reported. A coupled cavity with inner- and outer-intersecting couplings and precise control of the focusing magnetic field are used to improve the coupling between the fundamental and the harmonic and to adapt the sensitivity of the effect of focusing magnetic field on the beam-wave interaction in the gyro-TWT to high-order mode operation. Experimental results show that 75 kW of peak output power with a bandwidth of 1.06% and a gain of more than 25 dB can be reached at a pulse voltage of 67.2 kV and a pulse current of 15.8 A.
Keywords :
gyrotrons; travelling wave tubes; Ka-band harmonic-multiplying gyrotron traveling-wave tube; beam-wave interaction; coupled cavity; current 15.8 A; gyro-TWT; high-order mode operation; intersecting couplings; magnetic field; power 75 kW; voltage 67.2 kV; Bandwidth; Cathodes; Cavity resonators; Electron tubes; Frequency; Gyrotrons; Harmonic analysis; Magnetic field measurement; Optical coupling; Power amplifiers; Power generation; Power system harmonics; Pulse amplifiers; Voltage; Coupled cavity; gyrotron traveling-wave tube (gyro-TWT); harmonic multiplying; high-order mode;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2010.2056310
