Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
권호 표지

Ring Hybrid Coupler with Compact Size and Wide Bandwidth

넓은 대역폭을 가지는 소형 링 하이브리드

  • Kim, Ui-Jung (Department of Radio Communication Engineering, Kumoh National Institute of Technology) ;
  • Kim, Seung-Hwan (Department of Radio Communication Engineering, Kumoh National Institute of Technology) ;
  • Kim, Ell-Kou (Department of Radio Communication Engineering, Kumoh National Institute of Technology) ;
  • Lee, Young-Soon (Department of Radio Communication Engineering, Kumoh National Institute of Technology) ;
  • Kim, Young (Department of Radio Communication Engineering, Kumoh National Institute of Technology) ;
  • Yoon, Young-Chul (Electronics and Information Communication Engineering, Kwandong University)
  • 김의중 (금오공과대학교 전자공학부) ;
  • 김승환 (금오공과대학교 전자공학부) ;
  • 김일규 (금오공과대학교 전자공학부) ;
  • 이영순 (금오공과대학교 전자공학부) ;
  • 김영 (금오공과대학교 전자공학부) ;
  • 윤영철 (관동대학교 전자 정보 통신 공학과)
  • Received : 2009.03.03
  • Accepted : 2009.04.30
  • Published : 2009.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

This paper introduces a ring hybrid coupler using shunt capacitors, high impedance lines and CRLH-TLs (Composite Right/Left-Handed Transmission Lines) with size reduction and bandwidth enhancement. The reduced method of line length uses to combine a short length high impedance line and shunt capacitors. Also, there is combined CRLH meta-material so as to obtain wide bandwidth of transmission line using nonlinear phase characteristic of CRLH-TL that consists of series capacitors and shunt inductors. The implemented ring hybrid coupler shows a novel design with compact size that is smaller than 10% and bandwidth is larger than 60% of conventional ring hybrid coupler.

본 논문은 병렬 캐패시터와 고 임피던스 선로 그리고 CRLH-TLs (Composite Right/Left-Handed Transmission Lines)을 이용한 소형화와 대역폭 확장을 한 링 하이브리드 커플러 설계에 대한 것이다. 소형화를 위해 전송 선로의 길이를 줄이는 방법은 전송선로를 고 임피던스 선로와 병렬 캐패시터로 대체하였고, 또한 대역폭 향상을 위해서는 직렬 캐패시터와 병렬 인덕터로 구성된 CRLH 매타 재질의 비선형적인 위상특성을 이용하였다. 이렇게 제작된 링 하이브리드 커플러는 기존 커플러와 비교해서 크기는 10% 이하로 줄였으며, 대역폭은 60% 이상 확장되었음을 제시하였다.

Keywords

References

  1. V. I. Albanese, W. P. Peyser, "An analysis of a broad-band coaxial hybrid ring," IRE Trans. Microwave Theory Tech., vol. 6, pp. 369-373, Oct. 1958. https://doi.org/10.1109/TMTT.1958.1125207
  2. L. K. Yeung, Y. E. Wang, "A novel 180o hybrid using broadside-coupled asymmetric coplanar striplines," IEEE Trans. Microwave Theory Tech., vol. 55, pp.2625-2630, Dec. 2007. https://doi.org/10.1109/TMTT.2007.910067
  3. C. -H. Chi, C. -Y. Chang, "A new class of wideband multisection 180o hybrid rings vertically installed planar couplers" IEEE Trans. Microwave Theory Tech., vol. 54 pp. 2478 - 2482, Jun. 2006. https://doi.org/10.1109/TMTT.2006.875799
  4. C. -H. Ho, L. Fan, and K. Chang, "New uniplanar coplanar waveguide hybrid-ring couplers and magic-T's", IEEE Trans. Microwave Theory Tech., vol. 42, pp.2440-2448, Dec. 1994. https://doi.org/10.1109/22.339779
  5. Hirota, T., Minakawa, A., Muraguchi, M ,"Reduced size branch line and rat race hybrid for uniplanar MMIC's," IEEE Trans. Microwave Theory Tech., vol. 38 Issue 3, pp.270-275. March 1990. https://doi.org/10.1109/22.45344
  6. H. Okabe, C. Caloz, and T. Itoh. "A compact enhanced-bandwidth hybrid ring using an artifical lumped-element left-handed transmission line section," IEEE Trans. Microwave Theory Tech., vol. 52, no. 3, pp. 798-804, March 2004. https://doi.org/10.1109/TMTT.2004.823541
  7. C Caloz, T Itoh, Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applications, Wiley & Sons Inc, 2006.