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

  • 제58권12호
  • /
  • Pages.2462-2467
  • /
  • 2009
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

CRLH 전송선로 구조를 이용한 이중대역 브랜치 라인 커플러 설계

Design of A Dual Band Branch Line Coupler Using a CRLH Transmission Line Structure

  • 박민우 (순천향대 전기통신공학과) ;
  • 구자경 (순천향대 전기통신공학과) ;
  • 임종식 (순천향대 전기통신공학과) ;
  • 정용채 (전북대 전자정보공학부) ;
  • 안달 (순천향대 전기통신공학과)
  • 발행 : 2009.12.01
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초록

This paper proposes a dual band branch line coupler (BLC) using a composite right/left handed (CRLH) transmission line. The existing dual band BLCs with open stubs require hundreds of line impedance for the open stub as the frequency bands approach to each other, so it has been almost impossible to realize them. However in the proposed BLC, a CRLH transmission line replaces the open stub with an extremely high line impedance so that the BLC circuit may be realized even two frequencies are close to each other. As an example, a dual band BLC operating at 1800MHz and 2300MHz (the frequency ratio is 1:1.28) is designed and measured. Open stubs with $560\Omega$ line impedance are replaced by CRLH transmission lines for realizing the dual band BLC. The measured performances prove that the dual band operation is well acceptable and the proposed design method is successful even the ratio between two frequencies is not around two nor more.

키워드

참고문헌

  1. K. C. Gupta, et aI., Microstrip Lines and Slotlines, [1] H. Joshi and W. J. Chappell, 'Dual-band lumped-element bandpass filter', IEEE Transactions on Microwave Theory and Technology, vol. 54, no. 12, pp. 4169-4177, December 2006 https://doi.org/10.1109/TMTT.2006.885576
  2. K. K. M. Cheng and F. L. Wong, 'A novel approach to the design and implementation of dual-band compact planar 900 branch-line coupler', IEEE Transactions on Microwave Theory and Technology, vol. 52, no. 11, pp. 2458-2463, November 2004 https://doi.org/10.1109/TMTT.2004.837151
  3. 김귀수, 권칠현, B. Dorjsuren, 임종식, 안달, '임의의 분배비를 갖는 새로운 이주애역 브랜치라인 커플러', 한국전자파학회논문지, 제20권, 5호, pp. 444-449, 2009 https://doi.org/10.5515/KJKIEES.2009.20.5.444
  4. 임종식, 구재진, 오성민, 안달, 최관순, '결함접지구조를 이용한 초고주파 비대칭 전력 분배기 설계' 대한전기학회논문지 제56권, 6호, pp. pp. 1099-1104, 2007. 6
  5. 임종식, 차현원, 정용채, 박웅희, 안달, '접지접촉문제가 없는 새로운 DGS 비대칭 브랜치라인 하이브리드 결합기', 대한전기학회논문지 제57권, 8호, pp. 1416-1421, 2008. 8
  6. K. C. Gupta, et aI., Microstrip Lines and Slotlines, 2nd edition, Artech House, Boston, 1996
  7. C. Caloz and T. Itoh, 'Transmission line approach of left-handed materials and microstrip implementation of an artificial LH transmission line', IEEE Transactions on Antenna and Propagation, vol. 52, no. 5, pp. 1159-1163, May 2004 https://doi.org/10.1109/TAP.2004.827249
  8. I-H. Lin, M. DeVincentis, C. Caloz and T. Itoh 'Arbitrary dual-band components using composite right/left-handed transmission lines', IEEE Transactions on Microwave Theory and Technology, voL 52, no. 4, pp. 1142-1149, April 2004 https://doi.org/10.1109/TMTT.2004.825747
  9. Z. Yu, H. Li and H. Sai-ling, 'A Tunable Dual Broadband Branch line Coupler Utilizing Composite Right/Left-Handed Transmission Lines', Journal of Zhejiang Univ. Science, vol. 6A, no. 6, pp. 483-486, June 2005 https://doi.org/10.1631/jzus.2005.A0483
  10. H. Lee and S. Nam, 'Triband Branch Line Coupler Using Double-Lorentz Transmission Lines', Microwave and Optical Technology Letters, vol. 50, no. 5, pp. 1174-1177, May 2008 https://doi.org/10.1002/mop.23311