The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

A Design and Fabrication of Low Phase Noise Frequency Synthesizer Using Dual Loop PLL

이중루프 PLL을 이용한 IMT-2000용 저 위상잡음 주파수 합성기의 설계 및 제작

  • 김광선 (한국전자통신연구원 전파확산기술연구팀) ;
  • 최현철 (경북대학교 전자전기컴퓨터학부)
  • Published : 2002.01.01
Download PDF
⟨ Previous Next ⟩

Abstract

A frequency synthesizer that can be used in IMT-2000 was designed and fabricated using dual loop PLL(Phase Locked Loop) in this paper. For improving phase noise characteristic two loops, reference loop and main loop, were divided. Phase noise was improved by transformed clamp type voltage controled oscillator and optimizing loop bandwidth in reference loop. And voltage controlled oscillator open loop gain in main loop. Fabricated the frequency synthesizer had 1.81GHz center frequency, 160MHz tuning range, 13.5dBm output power and -119.73dBc/Hz low phase noise characteristic.

본 논문에서는 이중 루프 PLL을 이용한 IMT-2000용 주파수 합성기를 설계 및 제작하였다. 위상잡음 특성을 개선하기 위해서 기준 루프와 두 개의 루프로 나누고 기준루프에는 변형 클램프 형태의 전압제어 발진기와 루프 필터를 최적화 함으로서 위상잡음을 개선하고 메인 루프에는 동축형 유전체 공진기를 사용한 전압제어 발진기와 위상 검출기로 SPD(Sampling Phase Detector)를 사용함으로서 분주기의 사용을 없애고 개루프 이득을 크게 함으로서 위상잡음 특성을 개선하였다. 이렇게 제작된 주파수 합성기는 1.81GHz의 중심주파수에 가변범위는 158.5MHz이고 위상잡음은 100kHz offset에서 -120..66dB로 우수한 특성을 나타내었다.

Keywords

References

  1. Richard D. Carsello et al, 'IMT- 2000 standards', IEEE Personal Communication, August 1997
  2. Ulrich L. Rohde, Digitat PLL Frequency Synthesizer, Prentice Hall , 1983
  3. Manassewitsh, frequency Synthesizer theory and designs, John Wiely and sons. 1987
  4. Crawford, Frequency Synthesizer DesignHandbook, Artech house, 1994
  5. Wolaver, Phase Locked Loop Circuit Design, Prentice Hall, 1991
  6. Roland E. Best, Phase-locked Loop, McGraw Hill, 1984
  7. Jianyi Zhou, 'A simple Method to Design Phase-Locked LOs for CDMA Mobile Com-munications System Using CAD Tools', Microwave journal pp. 88-94, July 1998
  8. Randall W. rhea, Oscillator design and Computer Simulation, Prentice Hall, 1990
  9. Eric Holzman, Solid-state microwave power oscillator design, Artec house, 1992
  10. Guillemo Gonzalez, Microwave Transistor Amplifiers, Prentice Hall, 1984
  11. Inder Bahl, Microwave soild state circuit design, John Wiely and sons , 1988
  12. Stephen A. Mass, Nonlinear microwave circuits, Artec house, 1988
  13. Danny I. Polidi, 'Design Method for coaxial-resonator oscillator', RF design, pp.66-68, Oct 1995
  14. H Brauns, 'First fully CAE of K-band sampling phase detector using periodic steady state analysis and sophisticated SRD modelling', 26th EuMC, pp. 973-976, September 1996
  15. Stephen Hamilton, 'Shunt-mode harmonic generation using step recovery diodes', The Microwave Journal, pp. 69-78, April 1967