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A new metasurface-assisted ultra-wideband window for a gyro-travelling-wave tube

Author

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  • Vishal Kesari
  • H. P. Varshini
  • Sakib Reza
  • S. K. Datta

Abstract

A cylindrical-pillar-based new meta-surface-assisted ultra-wideband window is proposed, designed and simulated, in the present paper, for a wideband gyro-traveling-wave tube. The return-loss characteristics were analyzed by simulation in a high-frequency structure simulator to calculate the bandwidth at an allowable return loss of −17 dB and the center frequency of 44.42 GHz of the operating bandwidth of 32.10 GHz (28.31–60.47 GHz) which is 72.26% relative bandwidth for the operating circular TE0,1 mode. The results with respect to which parameters/characteristics were validated within 5% against those obtained using CST Microwave Studio. The sensitivity analysis was also carried out to obtain the manufacturing tolerances. Interestingly, an improvement of 8.03% (from 64.23% to 72.26%) at an allowable return-loss of −17 dB was obtained in the proposed window over the bandwidth achieved in previously reported square-pillar with cylindrical-tip-based meta-surface-assisted window.

Suggested Citation

  • Vishal Kesari & H. P. Varshini & Sakib Reza & S. K. Datta, 2024. "A new metasurface-assisted ultra-wideband window for a gyro-travelling-wave tube," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 38(17), pages 1991-2002, November.
    • Handle: RePEc:taf:tewaxx:v:38:y:2024:i:17:p:1991-2002
    DOI: 10.1080/09205071.2024.2414739
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