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ADF4106 Based Wide Frequency-Coverage Frequency Synthesizer with Invariable Loop Bandwidth

Lianfu Liu

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Abstract

A novel ADF4106 based technique to develop wide frequency-coverage frequency synthesizer with invariable loop bandwidth is proposed in this paper.With the proposed method,the nonlinear property of voltage controlled oscillator(VCO) is compensated by real-timely tuning the phase detector(PD) current of the ADF4106,so as to avoid the performance degradation due to acute variety of loop bandwidth in the case of wide frequency coverage.By this,a wide frequency-coverage microwave frequency synthesizer implemented is developed.Experimental results show that,this frequency synthesizer has the satisfied performances of stable loop bandwidth,low phase noise,and fast frequency-switching speed in the whole frequency coverage.

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What this paper is about

A novel ADF4106 based technique to develop wide frequency-coverage frequency synthesizer with invariable loop bandwidth is proposed in this paper.With the proposed method,the nonlinear property of voltage controlled oscillator(VCO) is compensated by real-timely tuning the phase detector(PD) current of the ADF4106,so as to avoid the performance degradation due to acute variety of loop bandwidth in the case of wide frequency coverage.By this,a wide frequency-coverage microwave frequency synthesizer implemented is developed.Experimental results show that,this frequency synthesizer has the satisfied performances of stable loop bandwidth,low phase noise,and fast frequency-switching speed in the whole frequency coverage.

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Available abstract

A novel ADF4106 based technique to develop wide frequency-coverage frequency synthesizer with invariable loop bandwidth is proposed in this paper.With the proposed method,the nonlinear property of voltage controlled oscillator(VCO) is compensated by real-timely tuning the phase detector(PD) current of the ADF4106,so as to avoid the performance degradation due to acute variety of loop bandwidth in the case of wide frequency coverage.By this,a wide frequency-coverage microwave frequency synthesizer implemented is developed.Experimental results show that,this frequency synthesizer has the satisfied performances of stable loop bandwidth,low phase noise,and fast frequency-switching speed in the whole frequency coverage.

Key concepts: Frequency synthesizer, Voltage-controlled oscillator, Bandwidth (computing), Phase noise, Phase-locked loop, Electronic engineering, Direct digital synthesizer, Phase frequency detector

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