The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Dual-Band Unequal Power-Divider Miniaturized by Metamaterial CRLH Phase-Shift Lines

메타 재질 구조 CRLH 전송선 기반 소형 이중 대역 비균등 전력분배기

  • Eom, Da-Jeong (Department of Information and Telecommunication Engineering, University of Incheon) ;
  • Kahng, Sung-Tek (Department of Information and Telecommunication Engineering, University of Incheon)
  • 엄다정 (인천대학교 정보통신공학과) ;
  • 강승택 (인천대학교 정보통신공학과)
  • Received : 2012.05.25
  • Accepted : 2012.09.14
  • Published : 2012.09.30
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Abstract

In this paper, a new compact dual-band unequal power divider is suggested. Instead of the quarter wavelength transmission line(TX-line)s for the branches of the conventional Wilkinson's power divider, we use composite right- and left-handed(CRLH) phase-shift lines and can reduce the physical length. With the non-linear dispersion of the meta-meterial, each branch in the proposed divider is designed to have $+90^{\circ}$ and $-90^{\circ}$ at $f_1$ and $f_2$ respectively. To validate the proposed method, the performances of the circuit and full-wave simulation results are shown with the CRLH dispersion curve. The measurement results are compared with the simulation results. Also, the size reduction effect by the proposed scheme is addressed.

본 논문에서는 새로운 소형 이중 대역 비균등 전력 분배기를 제안한다. 기존의 1:2 비균등 Wilkinson 전력 분배기에서 ${\lambda}$/4 길이의 분기 선로 대신 CRLH 위상천이용 전송선을 사용하여 전체 구조의 물리적 크기를 줄인다. 메타 재질 구조의 비선형 분산 특성을 이용하여 비균등 분기선들이 $f_1$, $f_2$에서 각각 $+90^{\circ}$, $-90^{\circ}$의 위상이 나타나는 이중 대역 특성을 갖도록 설계한다. 설계 방법의 타당성 확인을 위해, 등가 모델, 3차원 모의실험의 성능과 함께 CRLH의 특성인 분산도가 제시된다. 모의실험 결과와 측정 결과를 비교하였으며, 제안 기법의 소형화 효과가 논의된다.

Keywords

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