The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design and Characterization of 3 dB Branch Type Directional Couplers using High-Tc Superconductors

고온초전도체를 이용한 가지 형태 3 dB 방향성 결합기 설계 및 특성해석

  • 정동철 (우석대학교 전기전자공학과) ;
  • 최명호 (광주보건대학 의료공학과)
  • Published : 2010.01.01
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Abstract

In this work, we presented the characterization of 3 dB branch type directional couplers by using High-Tc superconducting thin films. To do this, we deposited YBCO superconducting thin films on MgO substrates by using rf-magnetron sputtering techniques. The designed center frequency was 408 MHz and the designed passband was 20 MHz. Also we designed 3 dB Power difference and $90^{\circ}$ of phase difference between port 3 and port 4. The even and odd mode analysis were used to characterize our directional couplers and em Sonnet (full wave analysis program) was utilized to the optimum design. We reported experimental results, including a center frequency, passband, half power characteristics and phase differences. We confirmed that experimental results were in good agreements with characterization by using full wave analysis program.

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References

  1. 조용선, 박형민, 정수복, 최효상, "2차권선의 연결방법에 따른 변압기형 초전도 한류기 특성", 전기학회 논문지 P권, vol. 52, no. 12, pp.2078-3083, 2007.
  2. 김향곤, 최충석, 김동욱, 최효상, "비닐절연선의 산화물 성정특성과 화재조상의 적용", 전기학회 논문지 P권, vol. 56, no. 1, pp.37-44, 2007.
  3. M. A.Richard, K. B. Bashin, and P. C. Claspy, "Superconducting microstrip antennas: an experimental comparison of two feeding methods," IEEE Trans. Antennas Propagat., Vol.41, No.7, pp.967-974, 1993. https://doi.org/10.1109/8.237630
  4. M. J. Lancater, Passive Microwave Device application of high temperature superconductors, Cambridge University Press. Cambridge UK, 1997
  5. Dong Chul. Chung et. aI., "Comparison Between High-Tc Superconducting Microstrip Filters and Normal Conducting Counterparts", IEEE Trans on Applied supercond., vol. 9 no. 2 pp.3882-3885, 1999. https://doi.org/10.1109/77.783875
  6. David M. Pozar, Microwave Engineering, John Wiley & Sons, New York, USA, 1998.