Nonlinear UHF quartz MEMS oscillator with phase noise reduction

David T Chang,H P Moyer,R G Nagele,Randall L Kubena,R J Joyce,Deborah J Kirby,P D Brewer,H D Nguyen,Fred P Stratton

Micro Electro Mechanical Systems（2013）

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摘要

Stable local oscillators with low phase noise are extremely important elements in high performance communication and navigation systems. We present the development of compact UHF-band frequency sources capable of maintaining low phase noise for handheld portable systems. We also explored nonlinearity in MEMS resonators and attempted to use nonlinear dynamics to enhance phase noise performance. Using the quartz MEMS technology, we have thus far demonstrated a 635 MHz oscillator with -112 dBc/Hz phase noise at 1 kHz offset frequency. The controlled oscillation of this nonlinear Duffing resonator in a closed-loop system with improved phase noise is described.

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关键词

uhf oscillators,uhf resonators,closed loop systems,control nonlinearities,crystal resonators,micromechanical resonators,nonlinear control systems,phase noise,mems resonators,closed-loop system,compact uhf-band frequency sources,frequency 1 khz,frequency 635 mhz,handheld portable systems,high performance communication,low phase noise,navigation systems,nonlinear duffing resonator oscillation control,nonlinear uhf quartz mems oscillator,nonlinear dynamics,phase noise performance,phase noise reduction,quartz mems technology,stable local oscillators

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