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This paper proposes a novel folded waveguide circuit with dual-sheet electron beams, designed to achieve higher beam current and increased output power. The beam-wave interaction characteristics were simulated using CST Studio Suite. Simulation results demonstrate that the dual-beam structure achieves saturated output power exceeding 5.51 W within the 3-dB bandwidth range of 654–698 GHz. The saturated output power at the center frequency of 670 GHz are 10.58 W and the gain is 30.24 dB. The efficiency of beam-wave interaction is 1.70%. In contrast, the saturated output power, gain, and interaction efficiency of a single-beam folded waveguide circuit yield only 2.00 W, 23.01 dB and 0.64%. This novel folded waveguide slow-wave structure meets the requirements for high power and wide bandwidth. It shows potential for advancing terahertz imaging and communication systems.

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Design of a Folded Waveguide Circuit with Dual Sheet Electron Beams for Terahertz Waves

  • 会议论文

  • 发表日期：

    2026年

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  • Tieyan Zhang,
  • Wenxin Liu,
  • Qipei Ban,
  • Zhuolong Cai,
  • Wenxin Wu

摘要

This paper proposes a novel folded waveguide circuit with dual-sheet electron beams, designed to achieve higher beam current and increased output power. The beam-wave interaction characteristics were simulated using CST Studio Suite. Simulation results demonstrate that the dual-beam structure achieves saturated output power exceeding 5.51 W within the 3-dB bandwidth range of 654–698 GHz. The saturated output power at the center frequency of 670 GHz are 10.58 W and the gain is 30.24 dB. The efficiency of beam-wave interaction is 1.70%. In contrast, the saturated output power, gain, and interaction efficiency of a single-beam folded waveguide circuit yield only 2.00 W, 23.01 dB and 0.64%. This novel folded waveguide slow-wave structure meets the requirements for high power and wide bandwidth. It shows potential for advancing terahertz imaging and communication systems.