On the noise optimization of resonant MEMS sensors utilizing vibration mode localization
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Publication Date
2018Journal Title
Applied Physics Letters
ISSN
0003-6951
Publisher
AIP Publishing
Volume
112
Issue
19
Type
Article
Metadata
Show full item recordCitation
Zhao, C., Pandit, M., Sobreviela, G., Mustafazade, A., Du, S., Zou, X., & Seshia, A. (2018). On the noise optimization of resonant MEMS sensors utilizing vibration mode localization. Applied Physics Letters, 112 (19) https://doi.org/10.1063/1.5025818
Abstract
In this letter, we experimentally demonstrate the existence of an optimal operating region in a resonant microelectromechanical systems sensor utilizing the principle of vibration mode localization, to achieve ultra-high resolution amplitude ratio measurements. We have shown analytically that the coupling strength and stiffness mismatch between the two resonators are primary parameters that influence the resolution of the amplitude ratio measurements within such a sensor. Using this optimization strategy, a minimum noise spectral density equivalent to 16 ppb/Hz1/2in terms of normalized stiffness perturbation is experimentally demonstrated. This is by far the best resolution achieved in this type of sensor. These results can be used to aid the design of future high resolution sensor employing mode localization.
Sponsorship
Natural Environment Research Council (NE/N012097/1)
Identifiers
External DOI: https://doi.org/10.1063/1.5025818
This record's URL: https://www.repository.cam.ac.uk/handle/1810/279607
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http://www.rioxx.net/licenses/all-rights-reserved
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