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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Ring Hybrid Balun with Good Amplitude and Phase Balance and Its Application to a Balanced Frequency Doubler

진폭과 위상 특성을 개선한 링 하이브리드 결합기를 사용한 평형 주파수 체배기 회로

  • 나원 (서울시립대학교 전자전기컴퓨터공학부) ;
  • 이문규 (서울시립대학교 전자전기컴퓨터공학부)
  • Published : 2008.07.31
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Abstract

A modified broad-band ring hybrid balun with additional two shorted $\lambda$/4 stubs is proposed. The proposed balun is a modified version which has additional two shorted $\lambda$/4 stubs to compensate phase and amplitude imbalances of conventional ring hybrid coupler. To demonstrate the validity of the proposed balun, a balanced Schottky-diode frequency doubler is designed and measured. Measurement data show that the proposed frequency doubler has around 10 dB conversion loss and more than 30 dB fundamental suppression over an input range of $1.6{\sim}2.35\;GHz$.

본 논문에서는 두 개의 $\lambda$/4 단락 스터브를 사용하여 진폭과 위상 평형 특성을 개선한 링 하이브리드(ring hybrid) 회로를 제안하였다. 제안한 회로는 기존 링 하이브리드 결합기에 존재하는 위상과 진폭 비 평형 특성을 $\lambda$/4 단락 스터브를 통해 보정한 회로이다. 제안한 링 하이브리드 결합기의 성능을 검증하기 위하여 평형 다이오드 주파수 2 체배기 회로를 설계 및 측정하였다. 실험 결과 $1.6{\sim}2.35\;GHz$의 대역 내에서 최저 12.3 dB의 변환 손실과 30 dB 이상의 기본 주파수 격리도를 보였다.

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References

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