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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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A Novel Varactor Diodeless Push-Push VCO with Wide Tuning Range

바렉터 다이오드를 이용하지 않은 광대역 Push-Push 전압제어 발진기

  • Lee Moon-Que (Department of Electrical & Computer Engineering, University of Seoul) ;
  • Moon Seong-Mo (Department of Electrical & Computer Engineering, University of Seoul, Integrant Technologies Inc.) ;
  • Min Sangbo (Axiom Wireless Technologies, Inc.)
  • 이문규 (서울시립대학교 전자전기컴퓨터공학부) ;
  • 문성모 (서울시립대학교 전자전기컴퓨터공학부, 인티그런트 테크놀로지즈㈜) ;
  • 민상보 (엑시옴)
  • Published : 2005.04.01
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Abstract

An X-band push-push VCO for low cost applications is proposed. The designed push-push oscillator achieves a wide tuning range in the X-band by the collector bias tuning instead of extra varactor diodes. The measurement shows a wide tuning bandwidth of $900\;\cal{MHz}\;from\;10.9\;\cal{GHz}\;to\;11.8\;\cal{GHz}$ with a drain bias voltage varying from 4 to 9 V, excellent fudamental suppression of $-30\;\cal{dBc}$ and good phase noise of $-115\;\cal{dBc/Hz}\;@\;1\;\cal{MHz}$ offset.

본 논문에서는 저가형 구조에 이용 가능한 X-band 대역의 push-push형 VCO를 제안하였다. 제작된 push-push형 발진기는 부가적인 바렉터 다이오드를 사용하지 않고, 컬렉터 바이어스를 가변하여 X-band에서 넓은 주파수 가변을 얻었다. 측정 결과 컬렉터 바이어스 전압을 $4\~9V$ 가변하였을 때 $10.9\cal{GHz}\~11.8\cal{GHz}$의 $900\cal{MHz}$의 주파수 가변, $-30\;\cal{dBc}$ 이하의 우수한 $f_0$ 억압 특성, $-115\;\cal{dBc/Hz}\;@\;1\;\cal{MHz}$의 위상 잡음 특성을 가졌다.

Keywords

References

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