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<p>The high-power RF amplifier is a critical component of ion cyclotron range frequency systems (ICRF), playing a vital role in transmitting RF energy for plasma heating. This study employs an equivalent circuit model to systematically analyze and simulate the matching characteristics of the amplifier’s input and output matching circuits, aiming to achieve efficient signal amplification and transmission across the 40–90 MHz frequency range. By incorporating a two-port network model, the effects of VSWR and phase variations on RF voltage, current, and anode power dissipation (APD) are thoroughly investigated. The experimental results confirm that the APD calculated using the reflection coefficient closely aligns with measured data, reinforcing the accuracy and reliability of the theoretical model. This research provides a practical and reliable theoretical framework for optimizing the design of high-power RF amplifiers, significantly enhancing the performance and stability of megawatt-level transmitter systems.</p>

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Theoretical and experimental analysis of RF matching and anode power dissipation in high-power RF amplifiers

  • 期刊论文

  • 发表日期：

    2025年5月7日

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  • Y. P. Sun,
  • G. H. Zhu,
  • L. Wang,
  • X. J. Zhang,
  • C. M. Qin,
  • L. N. Liu,
  • Y. Z. Mao,
  • S. Yuan,
  • W. Zhang,
  • Y. Cheng,
  • H. Yang,
  • K. Zhang,
  • W. D. Wu,
  • S. Y. Song,
  • Q. Q. Chen,
  • R. Tao

摘要

The high-power RF amplifier is a critical component of ion cyclotron range frequency systems (ICRF), playing a vital role in transmitting RF energy for plasma heating. This study employs an equivalent circuit model to systematically analyze and simulate the matching characteristics of the amplifier’s input and output matching circuits, aiming to achieve efficient signal amplification and transmission across the 40–90 MHz frequency range. By incorporating a two-port network model, the effects of VSWR and phase variations on RF voltage, current, and anode power dissipation (APD) are thoroughly investigated. The experimental results confirm that the APD calculated using the reflection coefficient closely aligns with measured data, reinforcing the accuracy and reliability of the theoretical model. This research provides a practical and reliable theoretical framework for optimizing the design of high-power RF amplifiers, significantly enhancing the performance and stability of megawatt-level transmitter systems.