Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

X-band Low Phase Noise VCO Using Dual Coupled Spiral Resonator

Dual Coupled Spiral 공진기를 이용한 X-대역 저위상 잡음 전압 제어 발진기

  • Published : 2009.11.25
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, a novel voltage controlled oscillator (VCO) has been presented by using the microstrip square multiple spiral resonator for reducing the phase noise of VCO. The microstrip multiple square resonator has the large coupling coefficient value, which makes a high Q value, and has reduced phase noise of VCO. The VCO with 1.8 V power supply has phase noise of -115.0~-117.34 dBc/Hz @100 kHz in the tuning range, 8.935~9.4 GHz. When it has been compared with microstrip square multiple spiral resonator and coventional spiral resonator, the reduced Q value has been -32.7 dB and -57.6 dB respectively. This low phase noise VCO could ve available to a VCO in X-band.

본 논문에서는 낮은 위상잡음을 개선하기 위하여 마이크로스트립 사각 병렬 나선형 공진기를 이용한 향상된 전압 제어 발진기를 제시하였다. 마이크로스트립 사각 개방 루프 공진기는 큰 결합 계수 값을 갖는데 이는 Q값을 크게 만들고 전압 제어발진기의 위상 잡음을 줄일 수 있다. 1.8 V의 공급 전압을 사용한 전압 제어 발진기는 8.935~9.4 GHz의 주파수 조절 범위에서 -115.0~-117.34 dBc/Hz @100 kHz의 위상 잡음 특성을 갖는다. 마이크로스트립 사각 병렬 나선형 공진기와 일반적인 나선형 공진기를 비교했을 때, 개선된 Q값 특성은 -32.7 dB와 -57.6 dB이다. 제작된 저위상 잡음 전압 제어 발진기는 X-대역에서 전압 발진기로 이용될 수 있음을 확인 하였다.

Keywords

References

  1. F. J. Schmuckle, 'The method of lines for the analysis of rectangular spiral inductors', IEEE Transactions on Microwave Theory and Tech, Volume 41, Issue 6, June0July 1993
  2. C. D. Broomfield J. K. A. Everard, 'Flicker noise reduction using GaAs microwave feedforward amplifiers', 2000 IEEE International Frequency Control Symposium, City, Jun, 2000
  3. Kai Chang Encyclopedia of RF and Microwave Engineering, Wiley-Interscience, 2005
  4. D. B. Lesson, 'A simple model of feedback oscillator noise spectrum', in pro. IEEE, vol. 54, no. 2, pp. 426-434, Feb. 1966 https://doi.org/10.1109/PROC.1966.4734
  5. Zunfu Jiang, P. S. Excell, and Z. M. Hejazi, 'Calculation of distributed capacitance of spiral resonators' , IEEE Transactions on Microwave Theory and Tech, vol. 45, no 1, Jan. 1997
  6. Ali Hajimiri, 'The design of Low Noise Oscillators' Kluwer Academics Publishers. 1996
  7. Robert G. Rogers, 'Low Phase Noise Microwave Oscillator Design' Artech House. 1991
  8. J. Choi and C. S대. 'Low phase noise VCO using microstrip square open loop multiple split ring resonator', in IEEE MTT-S Int. Microw, Symp. Dig. Jun. 2008, pp. 1469-1472
  9. G. Sauvage, 'Phase noise in oscillators: A mathematical analysis of leeson`s model' IEEE Trans. on Instrumentation and Measurement, pp. 408-410, December 1977 https://doi.org/10.1109/TIM.1977.4314586