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Analysis and modeling of magnetic-free broadband circulator based on three switched reflection delay lines

Author

Listed:
  • Dawei Tang
  • Qianyin Xiang
  • Dengyao Tian
  • Mingye Fu
  • Xiaoguo Huang
  • Quanyuan Feng

Abstract

Magnetic-free broadband circulator structure based on three switched reflection type delay lines with a total electrical length of 180-degree at the switching frequency is investigated. The nonreciprocal transmission property is modeled and simulated, the impedance mismatching property and reconfigurable direction are studied. A prototype magnetic-free circulator circuit is designed and fabricated using coaxial cables and switches driving by switching frequency of 7.94 MHz with tolerance of ±10%. The nonreciprocal scatter parameters are measured in 300kHz ∼ 100 MHz. It shows that the circulator direction can be reconfigured by changing the switching frequency, and the maximum operating bandwidth equals 1.5fs which is limited by clock feedthrough and spectrum aliasing.

Suggested Citation

  • Dawei Tang & Qianyin Xiang & Dengyao Tian & Mingye Fu & Xiaoguo Huang & Quanyuan Feng, 2020. "Analysis and modeling of magnetic-free broadband circulator based on three switched reflection delay lines," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 34(14), pages 1858-1869, September.
    • Handle: RePEc:taf:tewaxx:v:34:y:2020:i:14:p:1858-1869
    DOI: 10.1080/09205071.2020.1792354
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