W-band dual-sheet beam traveling-wave tube with a novel planar slow-wave structure

National Key Laboratory on Vacuum Electronics, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054

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Supported by National Natural Science Foundation of China (61921002, 61988102 and 62071087).

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    A dual-beam rectangular ring-bar (DBRRB) slow wave structure (SWS), which is with a planar structure and is suitable for micro fabrication, is proposed for W-band traveling-wave tubes (TWT). Supported by a pair of T-shaped dielectric rods, the RRB SWS is fit for dual-sheet beam operation. The high frequency characteristics are analyzed by using computer simulations. Wide bandwidth input-output structures adopting tapered structure and step waveguide are designed. Hot-test performance of the RRB SWS is investigated by means of Particle-in-cell (PIC) simulations. A solenoid magnetic field of 0.6 T is adopted to focus the sheet beams with voltage and current of 11.2 kV and 0.12 A. The saturated output power of 56.7 W at 94 GHz is obtained at the output port, corresponding a gain of 27.4 dB. In addition, an attenuator is added to suppress oscillations and achieve stable operation.

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DONG Yang, GUO Jing-Yu, WANG He-Xin, WANG Zhan-Liang, LU Zhi-Gang, GONG Hua-Rong, DUAN Zhao-Yun, GONG Yu-Bin, WANG Shao-Meng. W-band dual-sheet beam traveling-wave tube with a novel planar slow-wave structure[J]. Journal of Infrared and Millimeter Waves,2022,41(1):268~273

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  • Received:April 01,2021
  • Revised:January 17,2022
  • Adopted:June 01,2021
  • Online: January 06,2022
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