Title :
16.5: The suppression of BWO power holes in the TWTs using the helix pitch taper method
Author :
Duan, Zhaoyun ; Guo, Fang ; Wang, YanMei ; Wei, Yanyu ; Gong, Yubin ; Wang, Wenxiang
Author_Institution :
Vacuum Electron. Nat. Lab., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Slow wave structures used in forward wave amplifiers like wide-band helix traveling wave tube (TWT) always support backward waves. A backward wave can interact with an electron beam and compete with the forward wave, and then the power holes occur under large signal conditions. The power holes have serious consequences for the TWT performances, especially for communication applications. In this paper, we have reported the research on backward wave oscillation (BWO) power holes using a 2D large signal helix TWT code and demonstrated an efficient method, the helix pitch taper method, to suppress the power holes.
Keywords :
backward wave oscillators; travelling wave tubes; 2D large signal helix TWT code; BWO power holes; backward wave oscillation; electron beam; forward wave amplifiers; helix pitch taper method; slow wave structures; wide-band helix traveling wave tube; Broadband amplifiers; Circuit simulation; Electron beams; Frequency; Power amplifiers; Power generation; Power system harmonics; Space charge; Vacuum technology; Wideband; Power holes; backward wave gain; traveling wave tube;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2010 IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-7098-3
DOI :
10.1109/IVELEC.2010.5503375
