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The Journal of The Korea Institute of Intelligent Transport Systems Vol.8 No.4 pp.46-52
상하 결합 마이크로스트립 공진기를 이용한 광대역 저 위상 잡음 전압제어발진기
Wideband and Low Phase Noise Voltage Controlled Oscillator Using a Broadside Coupled Microstrip Resonator
Abstract
In this paper, a novel VCO (Voltage Controlled Oscillator) structure is proposed to achieve the characteristic of low phase noise and a wide frequency tuning range. The proposed scheme adopts an impedance transforming technique to change a series resonance into a parallel resonance for maximizing the susceptance slope parameter. The manufactured VCO shows a frequency tuning bandwidth of 600MHz from 10.1GHz to 10.7GHz with a tuning voltage varying from 0 to 9V, an excellent phase noise below -119dBc/Hz@1MHz offset. The harmonic suppression is measured above 28dB.
