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Design of a 3.7 GHz TE10 – TE30 mode converter using stepped impedance transformer for CW applications

Author

Listed:
  • Yogesh M. Jain
  • Shrey Thakker
  • P. K. Sharma
  • Harish V. Dixit

Abstract

This paper presents the design and simulation of a novel TE10 to TE30 mode converter operating at 3.7 GHz and is subjected to high RF power of 500 kW in Continuous Wave (CW) regime. The design incorporates a stepped impedance transformer as opposed to the conventional capacitive button to improve the return loss and power handling capacity of the converter. A rigorous RF, breakdown and multiphysics analysis including thermal, fluid dynamics and stress physics is performed on the mode converter to ascertain its viability and usefulness as a power dividing network in the Passive Active Multijunction launcher for Lower Hybrid Current Drive systems of tokamaks. The proposed mode converter exhibits a return loss of ∼50 dB, mode conversion efficiency of ∼97% and a peak E-field of 685 kV/m is obtained as compared to that of 4.2 MV/m obtained in the conventional mode converter. Thus, the power handling capacity of the proposed mode converter design is found to be 97.3% higher than the conventional mode converter.

Suggested Citation

  • Yogesh M. Jain & Shrey Thakker & P. K. Sharma & Harish V. Dixit, 2021. "Design of a 3.7 GHz TE10 – TE30 mode converter using stepped impedance transformer for CW applications," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 35(13), pages 1699-1707, September.
    • Handle: RePEc:taf:tewaxx:v:35:y:2021:i:13:p:1699-1707
    DOI: 10.1080/09205071.2021.1915187
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