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Chin. Phys. B, 2013, Vol. 22(10): 108401    DOI: 10.1088/1674-1056/22/10/108401
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

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

Liu Lu-Weia, Wei Yan-Yua, Wang Shao-Menga, Hou Yana, Yin Hai-Ronga, Zhao Guo-Qinga, Duan Zhao-Yuna, Xu Jina, Gong Yu-Bina, Wang Wen-Xianga, Yang Ming-Huab
a National Key Laboratory of Science and Technology on Vacuum Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China;
b Beijing Vacuum Electronics Research Institute (BVERI), Beijing 100016, China
Abstract  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 conventional 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.
Keywords:  slotted helix      slow-wave structure      millimeter-wave      traveling-wave tube      beam-wave interaction  
Received:  06 December 2012      Revised:  17 April 2013      Published:  30 August 2013
PACS:  84.40.Fe (Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.))  
  84.47.+w (Vacuum tubes)  
  07.57.Hm (Infrared, submillimeter wave, microwave, and radiowave sources)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61271029), the Natural Science Key Laboratory Foundation, and the Natural Science Fund for Distinguished Young Scholars of China (Grant No. 61125103).
Corresponding Authors:  Wei Yan-Yu     E-mail:  yywei@uestc.edu.cn

Cite this article: 

Liu Lu-Wei, Wei Yan-Yu, Wang Shao-Meng, Hou Yan, Yin Hai-Rong, Zhao Guo-Qing, Duan Zhao-Yun, Xu Jin, Gong Yu-Bin, Wang Wen-Xiang, Yang Ming-Hua A novel slotted helix slow-wave structure for high power Ka-band traveling-wave tubes 2013 Chin. Phys. B 22 108401

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