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Phase Noise Model of Single Loop Frequency Synthesizer

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2 Author(s)
Young Wan Kim ; Kunsan Nat. Univ., Kunsan ; Jae Du Yu

The phase noise spectrum of a single loop frequency synthesizer for S-band, which can be utilized in broadcasting terminals, was predicted based on the analyses for phase noise contributions of noise sources. The proposed phase noise model in this paper more accurately predicts the phase noise spectrum of a frequency synthesizer. To accurately model the phase noise contributions of noise sources in the frequency synthesizer, the phase noise sources were analyzed via modeling of the frequency divider and phase noise components using Leeson model for the reference signal source and VCO. The phase noise transfer functions to VCO from noise sources were analyzed by superposition theory and linear operation of the phase-locked loop. The frequency synthesizers were fabricated and the phase noise prediction model was evaluated by measured data and prediction data.

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Broadcasting, IEEE Transactions on  (Volume:54 ,  Issue: 1 )