Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Implementation of Voltage Controlled Oscillator Using Planar Structure Split Ring Resonator (SRR)

평면형 구조의 분리형 링 공진기를 이용한 전압제어 발진기 구현

  • Kim, Gi-Rae (Department of Electronic Engineering, Silla University)
  • Received : 2013.03.11
  • Accepted : 2013.04.17
  • Published : 2013.07.31
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Abstract

In this paper, a novel split ring resonator is proposed for improvement of phase noise characteristics that is weak point of oscillator using planar type microstrip line resonator. Oscillator using proposed split ring resonator is designed, it has improved phase noise characteristics. At the fundamental frequency of 5.8GHz, 7.22dBm output power and -83.5 dBc@100kHz phase noise have been measured for oscillator with split ring resonator. The phase noise characteristics of oscillator is improved about 9.7dB compared to one using the general ${\lambda}/4$ microstrip resonator. Next, we designed voltage controlled oscillator using proposed split ring resonator with varactor diode. The VCO has 125MHz tuning range from 5.833GHz to 5.845GHz, and phase noise characteristic is -118~-115.5 dBc/Hz@100KHz. Due to its simple fabrication process and planar type, it is expected that the technique in this paper can be widely used for low phase noise oscillators for both MIC and MMIC applications.

평면형 마이크로스트립 공진기를 이용한 고주파 발진기의 단점인 위상잡음 특성을 개선하기 위해 본 논문에서는 분리형 링 공진기를 제안하였다. 제안된 공진기를 이용하여 위상잡음 특성 개선 효과를 나타내기 위해 발진기를 설계하여, 5.8GHz 기본 주파수에서 7.22dBm의 출력과 -83.5 dBc@100kHz의 위상잡음 특성을 나타내었다. 이것은 ${\lambda}/4$ 마이크로스트립 공진기를 이용한 발진기와 비교하여 위상잡음 특성이 9.7dB 정도 개선되었다. 다음은 제안된 공진기에 버랙터다이오드를 추가하여 전압제어발진기를 구현하였다. 발진기의 특성은 최소 5.833 GHz에서 최대 5.845 GHz 까지 125 MHz 정도의 튜닝범위를 가지고, -118~-115.5 dBc/Hz@100 KHz의 위상잡음 특성을 갖는다. 본 논문의 발진기는 평면형 구조로 쉬운 작업공정과 소형화 특성 때문에 MIC 또는 MMIC 분야의 설계에 응용될 수 있을 것이다.

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References

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