A novel slotted helix slow-wave structure for high power Ka-band traveling-wave tubes  

作　　者：刘鲁伟 魏彦玉 王少萌 侯艳 殷海荣 赵国庆 段兆云 徐进 宫玉彬 王文祥 杨明华 

机构地区：[1]National Key Laboratory of Science and Technology on Vacuum Electronics,University of Electronic Science and Technology of China [2]Beijing Vacuum Electronics Research Institute (BVERI)

出　　处：《Chinese Physics B》2013年第10期593-597,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61271029);the Natural Science Key Laboratory Foundation;the Natural Science Fund for Distinguished Young Scholars of China(Grant No.61125103)

摘　　要：A novel slotted helix slow-wave structure （SWS） is proposed to develop a high power, wide-bandwidth, and high reliability millimeter-wave traveling-wave tube （TWT）. This novel structure, which has higher heat capacity than a conven- tional helix SWS, evolves from conventional helix SWS with three parallel rows of rectangular slots made in the outside of the helix tape. In this paper, the electromagnetic characteristics and the beam-wave interaction of this novel structure operating in the Ka-band are investigated. From our calculations, when the designed beam voltage and beam current are set to be 18.45 kV and 0.2 A, respectively, this novel circuit can produce over 700-W average output power in a frequency range from 27.5 GHz to 32.5 GHz, and the corresponding conversion efficiency values vary from 19% to 21.3%, and the maximum output power is 787 W at 30 GHz.A novel slotted helix slow-wave structure （SWS） is proposed to develop a high power, wide-bandwidth, and high reliability millimeter-wave traveling-wave tube （TWT）. This novel structure, which has higher heat capacity than a conven- tional helix SWS, evolves from conventional helix SWS with three parallel rows of rectangular slots made in the outside of the helix tape. In this paper, the electromagnetic characteristics and the beam-wave interaction of this novel structure operating in the Ka-band are investigated. From our calculations, when the designed beam voltage and beam current are set to be 18.45 kV and 0.2 A, respectively, this novel circuit can produce over 700-W average output power in a frequency range from 27.5 GHz to 32.5 GHz, and the corresponding conversion efficiency values vary from 19% to 21.3%, and the maximum output power is 787 W at 30 GHz.

关 键 词：slotted helix slow-wave structure MILLIMETER-WAVE traveling-wave tube beam-wave interaction 

分 类 号：TN124[电子电信—物理电子学]