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This paper proposes a novel helix Slow Wave Structure (SWS) for a Traveling-Wave Tube (TWT) amplifier. The device achieves a gain higher than 30 dB while maintaining extremely compact dimensions, with a very low beam voltage of 2050 V in the 17–21 GHz frequency band. The beam current is 90 mA and the required magnetic focusing field is about 0.31 T. The resulting electronic efficiency is approximately 11.5%. These values show the potential for further reduction, making the proposed SWS highly suitable for low-voltage integrated microwave applications, including satellite communications systems.

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Preliminary Study on a Very-Low-Voltage Integrated Helix Traveling-Wave Tube Operating in the 17–21 GHz Band

  • 会议论文

  • 发表日期：

    2026年

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  • Vincenzo Sottile,
  • Eleonora Traina,
  • Giuseppe Paterna,
  • Giorgia Comparato,
  • Antonio Mendolia Calella,
  • Rosario Martorana,
  • Giovanni Li Calsi,
  • Antonino Muratore,
  • Salvatore Stivala,
  • Patrizia Livreri,
  • Alessandro Busacca

摘要

This paper proposes a novel helix Slow Wave Structure (SWS) for a Traveling-Wave Tube (TWT) amplifier. The device achieves a gain higher than 30 dB while maintaining extremely compact dimensions, with a very low beam voltage of 2050 V in the 17–21 GHz frequency band. The beam current is 90 mA and the required magnetic focusing field is about 0.31 T. The resulting electronic efficiency is approximately 11.5%. These values show the potential for further reduction, making the proposed SWS highly suitable for low-voltage integrated microwave applications, including satellite communications systems.