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Design and simulation of 140 GHz high power staggered double vane traveling-wave tube

Lai Jian-Qiang Wei Yan-Yu Xu Xiong Shen Fei Liu Yang Huang Min-Zhi Tang Tao Gong Yu-Bin

Design and simulation of 140 GHz high power staggered double vane traveling-wave tube

Lai Jian-Qiang, Wei Yan-Yu, Xu Xiong, Shen Fei, Liu Yang, Huang Min-Zhi, Tang Tao, Gong Yu-Bin,
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Publishing process
  • Received Date:  16 November 2011
  • Accepted Date:  15 December 2011
  • Published Online:  05 September 2012

Design and simulation of 140 GHz high power staggered double vane traveling-wave tube

  • 1. National Key Laboratory of Science and Technology on Vacuum Electronics, School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Fund Project:  Project supported by the National Science Fund for Distinguished Young Scholars of China (Grant No. 61125103), the National Natural Science Foundation of China (Grant No. 60971038), and the Fundamental Research Funds for the Central Universities (Grant No. ZYGX2009Z003).

Abstract: Staggered double vane slow wave structure (SWS) and sheet electron beam are employed to investigate a 140 GHz high power traveling wave tube. Numerical calculation of eigenmode shows that the SWS has a good characteristic of dispersion and interaction impedance. The transition structure, input/output coupler and concentrated attenuator are especially proposed for the circuit to ensure that the tube will work well. Particle-in-cell simulation results demonstrate that the traveling wave tube can provide over 300 W of peak power in a frequency range of 132-152 GHz with a maximum of 546 W and a corresponding gain of 37.37 dB at 138 GHz assuming a beam power to be 5.115 kW and input power to be 0.1 W. The output power of the tube can exceed 440 W in a frequency range of 128-152 GHz with a corresponding interaction efficiency of over 8.6% when the input powers range from 0.027 W to 0.46 W. Such a traveling wave tube has a great significance and a potential application in high power short millimeter wave field.

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