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Analysis and design of a novel dual-band coaxial waveguide mode converter for high-power microwave applications

Author

Listed:
  • Keqiang Wang
  • Hao Li
  • Tianming Li
  • Yong Luo
  • Haiyang Wang
  • Jianing Zhao
  • Chaoxiong He

Abstract

Based on the derived coupling coefficients of the circular waveguide and coaxial waveguide, a novel dual-band serpentine coaxial mode converter is proposed in this paper. This dual-band converter consists of two parts: an inner inserted circular waveguide TM01-TE11 converter operating at Ka-band, and an outer coaxial waveguide TEM-TE11 converter working at Ku-band. The inner and outer converters have the same curvature distribution along the propagation direction with a structure length of 800 mm. Simulated results exhibit that the maximum conversion efficiencies of the inner and outer converters reach 98.7% and 98.9% at 35 and 15 GHz, respectively. The bandwidths of the inner and outer converter are 1.9 and 2.5 GHz when the conversion efficiency is over 90%. Furthermore, the dual-band mode converter has a symmetry and reciprocity structure with coaxial-parallel input/output port. The good agreement between theoretical calculations and simulation demonstrates the feasibility of this design.

Suggested Citation

  • Keqiang Wang & Hao Li & Tianming Li & Yong Luo & Haiyang Wang & Jianing Zhao & Chaoxiong He, 2019. "Analysis and design of a novel dual-band coaxial waveguide mode converter for high-power microwave applications," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 33(13), pages 1789-1800, September.
    • Handle: RePEc:taf:tewaxx:v:33:y:2019:i:13:p:1789-1800
    DOI: 10.1080/09205071.2019.1643791
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