Journal of Advanced Navigation Technology (한국항행학회논문지)

The Korean Navigation Institute (한국항행학회)
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Common-Mode Suppression Balanced Filter based on Composite Right/Left-Handed Transmission Line

CRLH 전송선로를 이용한 공통 모드 억압 평형 필터

  • Kim, Young (Department of Radio Communication Engineering, Kumoh National Institute of Technology) ;
  • Yun, Jeong-Ho (Department of Radio Communication Engineering, Kumoh National Institute of Technology) ;
  • Yoon, Young-Chul (Department of Electronics & Information Communication Eng., Kwandong University)
  • 김영 (금오공과대학교 전파통신과) ;
  • 윤정호 (금오공과대학교 전파통신과) ;
  • 윤영철 (관동대학교 전자정보통신공학부)
  • Received : 2011.06.24
  • Accepted : 2011.08.30
  • Published : 2011.08.31
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Abstract

This paper presents a novel balanced filter design based on a metamaterial structure applicable to differential-mode excitation. The metamaterial structure is based on a unit-cell which under a differential-mode excitation behaves like composite right/left-handed(CRLH) metamaterial with filter characteristics. In contrast, the metamaterial unit-cell is below cut-off under a common-mode excitation. Experimental results are used to verify the proposed metamaterial's differential-mode characteristics. The metamaterial is fabricated with a balanced filter design resulting in an operating frequency range of 960~1000 MHz with a insertion loss of 4.1 dB.

본 논문은 차동 모드로 동작하는 메타 재질 구조를 바탕으로 평형 필터 설계를 제안한 것이다. 이 메타 재질 구조는 차동 모드 동작에서는 Composite Right/Left-Handed(CRLH) 메타 재질로 동작하여 필터 특성을 갖지만, 공통 모드에서는 통과대역이 차단되는 성질을 갖는 평형 CRLH 단위 셀로 구성되었다. 이러한 차동모드 특성을 갖는 단위 셀을 직렬로 4단을 연결하여 필터를 구성하였으며, 제안된 메타 재질의 특성은 차동 모드 평형 필터로 동작하고, 공통 모드에서는 차단되는 특성을 실험 결과를 통하여 확인하였다. 메타 재질을 이용한 평형 필터는 대역폭이 960 MHz~1000 MHz, 4.1dB의 삽입손실을 갖는 특성을 얻었다.

Keywords

References

  1. M.C. Park, B.H Lee, and D.S. Park,"A laminated balanced filter using LTCC technology," in Proc. Asia-Pacific Microw. Conf., 2005, pp. 4-7.
  2. A. Ziroff, M. Nalezinski, and W. Menzel," A 40 GHz LTCC receiver module using a novel submerged balancing filter structure," in Proc. Radio Wireless Conf., 2003, pp. 151-154.
  3. C. H. Wu, C. H. Wang and C. H. Chen, "Novel balanced coupled-line bandpass filters with common-mode noise suppression," IEEE Trans. Microw. Theory Tech., vol. 55, no. 2, pp.287-295, Feb. 2007.
  4. C. H. Wu, C. H. Wang and C. H. Chen, "Balanced coupled-resonator bandpass filters using multisection resonators for common-mode suppression and stopband extension," IEEE Trans. Microw. Theory Tech., vol. 55, no. 8, pp.1756-1763, Aug. 2007.
  5. J. E. Lim, M. H. Nam, H. O. Choi, and J. H. Lee, "Two-port banlanced dual-band bandpass filter based on stepped impedance resonators," Proceedings of Asia-Pacific Microwave Conference 2010, pp. 1114-1117., Dec. 2010.
  6. 김 영, "CRLH 전송선로 리키 웨이브 안테나를 이용한 평형 믹서," 한국전자파학회 논문지, 제19권, 제9호, 2008년 9월.
  7. D. E. Bockelman, and W. R. Eisenstadt, "Combined Differential and Common-Mode Scattering Parameters: Theory and Simulation," IEEE Trans. Microw. Theory Tech., vol. 43, no. 7, pp.1530-1539, July 1995. https://doi.org/10.1109/22.392911
  8. C. Caloz and T. Itoh, Electronmagnetic Metamaterials Transmission Line theory and microwave applications, New Jersey: J. Wiley & Sons, 2006.