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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Low Phase Noise VCO Using Complimentary Bifilar Archimedean Spiral Resonator(CBASR)

Complimentary Bifilar Archimedean Spiral Resonator(CBASR)를 이용한 저위상 잡음 전압 제어 발진기

  • Lee, Hun-Sung (Department of Computer and Radio Communications Engineering, Korea University) ;
  • Yoon, Won-Sang (Department of Computer and Radio Communications Engineering, Korea University) ;
  • Lee, Kyoung-Ju (Department of Computer and Radio Communications Engineering, Korea University) ;
  • Han, Sang-Min (Department of Information & Communication Engineering, Soonchunhyang University) ;
  • Pyo, Seong-Min (Department of Computer and Radio Communications Engineering, Korea University) ;
  • Kim, Young-Sik (Department of Computer and Radio Communications Engineering, Korea University)
  • 이훈성 (고려대학교 컴퓨터전파통신공학과) ;
  • 윤원상 (고려대학교 컴퓨터전파통신공학과) ;
  • 이경주 (고려대학교 컴퓨터전파통신공학과) ;
  • 한상민 (순천향대학교 정보통신공학과) ;
  • 표성민 (고려대학교 컴퓨터전파통신공학과) ;
  • 김영식 (고려대학교 컴퓨터전파통신공학과)
  • Accepted : 2010.05.06
  • Published : 2010.06.30
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Abstract

In this paper, a novel voltage-controlled oscillator(VCO) using the complimentary bifilar archimedean spiral resonator(CBASR) is presented for reducing the phase noise characteristic. A CBASR has compact dimension, a sharp skirt characteristic in stopband, a low insertion loss in passband, and a large coupling coefficient value, which makes a high Q value and improve the phase noise of VCO. The proposed VCO has the oscillation frequency of 2.396~2.502 GHz in the tuning voltage of 0~5 V, the output power of 7.5 dBm and phase noise of -119.16~-120.2 dBc/㎐ at the offset frequency of 100 kHz in tuning range.

본 논문에서는 complimentary bifilar archimedean spiral resonator(CBASR)를 이용하여 저위상 잡음 특성을 갖는 새로운 구조의 전압 제어 발진기를 제안하였다. CBASR은 작은 면적, 저지대역에서 날카로운 스커트 특성과 통과대역에서 낮은 삽입 손실, 큰 결합 계수 값을 나타내며, 이로 인해 높은 Q값을 구현할 수 있는 장점이 있다. 따라서, 본 논문에서는 CBASR을 공진 회로로 사용하여 전압 제어 발진기의 위상 잡음을 개선시켰다. 제안된 전압 제어 발진기의 주파수 조절 범위는 제어 전압 0~5 V에서 2.396~2.502 GHz이며, 출력은 7.5 dBm, 그리고 위상 잡음 특성은 100 kHz offset에서 -119.16~-120.2 dBc/Hz이다.

Keywords

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