Abstract
본 논문은 나선형 공진기를 이용한 CPW 발진기의 설계에 대하여 기술한다. CPW 나선형 공진기는 기존의 CPW 헤어핀, 헬리컬 공진기에 비하여 높은 Q 특성을 가지므로 출력특성과 크기가 개선된 발진기 설계에 유리하다. CPW 발진기 설계에 앞서 세 가지 CPW 공진기의 특성을 비교한다. EM 시뮬레이션을 행하여 공진기 설계 및 발진기 성능 확인에서의 정확도를 높였음을 보인다. 세 가지 CPW 공진기를 이용하여, 5.7 GHz 대역에서 각각 발진기를 설계하였다. 제작 및 측정 결과, 헬리컬, 헤어핀, 나선형 공진기를 이용한 각각 CPW 발진기의 측정된 출력은 각각 2.55 dBm, 2.64 dBm, 4.98 dBm이다. 한편 세 가지 공진기는 각각 $102.15mm^2,\;130.05mm^2,\;80.625mm^2$ 크기를 보여, 제안한 CPW 나선형 공진기가 다른 공진기에 비해 크기 감소 효과도 우수함이 제시된다. 【This paper describes a CPW oscillator using a spiral resonator. Spiral resonators are very useful in design CPW oscillators since they show a relatively higher Q than CPW hairpin and helical resonators. Prior to the design of oscillators, three CPW resonators are designed and compared. Electromagnetic (EM) simulation are performed for an improved design in design the CPW resonators and oscillators. Three oscillators are designed at 5.7 GHz using the mentioned CPW resonators. The measured output power of three CPW oscillators using the helical, hairpin, and spiral resonators are 2.55 dBm, 2.64 dBm, and 4.98 dBm, respectively. In addition, the size of three resonators are $102.15mm^2,\;130.05mm^2,\;80.625mm^2$ , respectively, so it is proven that the proposed CPW oscillator using the spiral resonator has a smaller size than the others.】
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