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In this paper, a novel double-corrugated waveguide with grating (DCWG) slow-wave structure (SWS) is proposed for low-voltage terahertz traveling wave tubes. The structure is advantageous in that it is suitable for interaction with cylindrical electron beams, has a low operating voltage, a wide operating bandwidth, minimal reflection, and is easily manufactured. The results of the simulation indicate that the transmission parameter exceeds −3.0 dB within the frequency range spanning from 200 GHz to 250 GHz. The beam-wave interaction results demonstrate that the DCWG travelling wave tube has the capacity to deliver an output power that exceeds the maximum of 42 W and a gain of 25 dB when utilising a cylindrical electron beam with a voltage of 9.3 kV and a current of 200 mA.

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Design of a Low-Voltage Broadband Terahertz TWT

  • 会议论文

  • 发表日期：

    2026年

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  • Weilong Wang,
  • Zhaowei Qu,
  • Wenxin Liu,
  • Fang Zhu,
  • Zhaochuan Zhang

摘要

In this paper, a novel double-corrugated waveguide with grating (DCWG) slow-wave structure (SWS) is proposed for low-voltage terahertz traveling wave tubes. The structure is advantageous in that it is suitable for interaction with cylindrical electron beams, has a low operating voltage, a wide operating bandwidth, minimal reflection, and is easily manufactured. The results of the simulation indicate that the transmission parameter exceeds −3.0 dB within the frequency range spanning from 200 GHz to 250 GHz. The beam-wave interaction results demonstrate that the DCWG travelling wave tube has the capacity to deliver an output power that exceeds the maximum of 42 W and a gain of 25 dB when utilising a cylindrical electron beam with a voltage of 9.3 kV and a current of 200 mA.