Title :
Experimental study of a Q-band gyro-TWT
Author :
Bentian Liu ; Zhiliang Li ; Efeng Wang ; Xu Zeng ; Yuan Zhu ; Jinjun Feng ; Tiechang Yan
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Beijing Vacuum Electron. Res. Inst., Beijing, China
Abstract :
The experimental study of a Q-band gyrotron-travelling-wave tube (gyro-TWT) amplifier operating in the circular TE01 mode at fundamental cyclotron harmonic is presented. A periodic dielectric loaded structure is adopted in the interaction circuit of the gyro-TWT to suppress spurious modes TE11 and TE21. A saturated peak power of 175 kW is obtained corresponding to saturated gain of 53 dB and an efficiency of 38% with -3dB bandwidth of 3 GHz(~7%). The gyro-TWT is found to be zero-drive stable at these operating points.
Keywords :
dielectric-loaded waveguides; gyrotrons; millimetre wave tubes; travelling wave tubes; Q-band gyro-TWT amplifier; Q-band gyrotron-travelling-wave tube amplifier; TE11; TE21; bandwidth 3 GHz; circular TE01 mode; efficiency 38 percent; fundamental cyclotron harmonic; gain 53 dB; periodic dielectric loaded structure; power 175 kW; spurious modes; zero-drive stability; Bandwidth; Circuit stability; Dielectrics; Frequency measurement; Gain; Gyrotrons; Power measurement; Dielectric loaded waveguides; Q-Band; gyrotron; millimeter wave;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2013 IEEE 14th International
Conference_Location :
Paris
Print_ISBN :
978-1-4673-5976-4
DOI :
10.1109/IVEC.2013.6570913
