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In this paper, an extended interaction klystron(EIK) operating at 263 GHz is proposed and analyzed, which uses a conventional ladder-type resonant cavity structure to obtain higher power output. By investigating the high-frequency characteristics as well as the beam–wave interaction, a five-cavity EIK is proposed, in which the input and the middle cavities are five-gap, while the output cavity is seven-gap. The three-dimensional Particle in Cell simulation results show a stable output power of 120 W, a gain of 23.8 dB and an efficiency of 2.2% under the voltage of 18 kV, the current of 0.3 A with a drive signal of 0.5 W.The spectrum predicts that the output signal is at 263.04 GHz.

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A Design of 0.263-THz Extended Interaction Klystron

  • 会议论文

  • 发表日期：

    2026年

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

摘要

In this paper, an extended interaction klystron(EIK) operating at 263 GHz is proposed and analyzed, which uses a conventional ladder-type resonant cavity structure to obtain higher power output. By investigating the high-frequency characteristics as well as the beam–wave interaction, a five-cavity EIK is proposed, in which the input and the middle cavities are five-gap, while the output cavity is seven-gap. The three-dimensional Particle in Cell simulation results show a stable output power of 120 W, a gain of 23.8 dB and an efficiency of 2.2% under the voltage of 18 kV, the current of 0.3 A with a drive signal of 0.5 W.The spectrum predicts that the output signal is at 263.04 GHz.