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Investigation of the curvature distribution for TE01-to-TM11 mode converter

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  • Xiaoyi Liao
  • Zewei Wu
  • Minxing Wang

Abstract

An oversized TE $ _{01} $ 01-to-TM $ _{11} $ 11 mode converter based on waveguide bend structure is designed for high power transmission line. The curvature distribution of the waveguide bend is analyzed and optimized using mode coupling theory. Analysis results show that the curvature near the output port plays a decisive role in the content of the parasitic modes, which indicates that the restriction on curvature far from output port could be relaxed. Therefore, the asymmetric waveguide axis with enhanced curvature near the front end and lessened curvature near the output port will have a high conversion efficiency and a broad bandwidth. Combining the curvature optimization and the phase rematching technology proposed in our preliminary work, the TE $ _{01} $ 01-to-TM $ _{11} $ 11 mode converter realizes a 90 $ ^\circ $ ∘ bend with a conversion efficiency over 95% in the range of 26–32.2 GHz (the relative bandwidth over 21%). To verify the designed mode converter, a prototype is manufactured and measured.

Suggested Citation

  • Xiaoyi Liao & Zewei Wu & Minxing Wang, 2022. "Investigation of the curvature distribution for TE01-to-TM11 mode converter," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 36(10), pages 1451-1462, July.
    • Handle: RePEc:taf:tewaxx:v:36:y:2022:i:10:p:1451-1462
    DOI: 10.1080/09205071.2022.2032378
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