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Updated: Mar 14, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
Exploring the synergic effect of thermal tuning and mode-coupling for frequency stabilization in micromechanical
Yuhao Xiao1,2,3, Chengliang Sun1, Sheng Liu4,5
1School of Integrated Circuits, Wuhan University, Wuhan, 430072, Hubei Province, China.
Abstract:
This work investigates the synergic effect of thermal tuning and mode-coupling on frequency stability in a dual-mode micromechanical resonator. Under dynamic input excitation, the signal in one mode induces the frequency shift of the other mode due to the self-heating and mode-coupling effects. We propose a method to stabilize frequency of the dual-mode resonator under dynamic piezoelectric excitation. The method leverages an on-chip micro-oven to thermally tune the resonator at different temperature coefficients of frequency (TCF) points, enabling the control of self-heating and mode-coupling induced resonant frequency shifts. In our experiment, the resonator is maintained at an appropriately selected TCF point, where the frequency shift caused by mode-coupling can be compensated by the self-heating effect. These findings provide valuable insights into the thermal and nonlinear dynamics of dual-mode resonators and offer a promising strategy for designing high-performance micromechanical resonators in timing and sensing applications.
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