Title :
Study of the output characteristics of a Ka-band, second harmonic three-cavity gyroklystron amplifier
Author :
Jia Yun-feng ; Xian-Feng, Ling ; Pu-Kun, Liu ; Min, Zhu ; Zhi-Hui, Geng ; Shi-Chang, Zhang
Author_Institution :
Inst. of Electron., Chinese Acad. of Sci., Beijing, China
Abstract :
The optimal design of the output cavity of a Ka-band second harmonic three-cavity gyroklystron amplifier is finished based on beam-wave interaction characteristics of the amplifier in this paper. The diffraction Q variation with the size of the diffraction output aperture at the end of the output cavity is calculated. By PIC simulations, the output characteristics of the amplifier such as the frequency response etc. are analyzed. At 35.0GHz, a peak output power of more than 220kW with an electronic efficiency of about 23%, and a gain of 23dB, and a 3-dB bandwidth of 110 MHz (0.3%) is obtained with a 70-kV, 15-A electron beam at a magnetic field of 0.685T and a beam velocity ratio of a 1.45.
Keywords :
frequency response; gyrotrons; klystrons; millimetre wave amplifiers; millimetre wave tubes; 0.685 T; 110 MHz; 15 A; 23 dB; 35 GHz; 70 kV; Ka band; PIC simulations; beam-wave interaction characteristics; diffraction output aperture; diffraction variation; electron beam; frequency response; magnetic field; output cavity; second harmonic gyroklystron amplifier; three-cavity gyroklystron amplifier; Analytical models; Apertures; Bandwidth; Diffraction; Electron beams; Frequency response; Klystrons; Magnetic analysis; Power amplifiers; Power generation;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2004. ICMMT 4th International Conference on, Proceedings
Print_ISBN :
0-7803-8401-6
DOI :
10.1109/ICMMT.2004.1411519
