Projects per year
The 3-D finite-element model (FEM) of a Y-cut plano-plano langasite crystal thickness shear mode (TSM) resonator is presented, and Mindlin's theory is used to investigate the optimal electrode shapes and sizes for langasite crystal resonator. Circular and elliptical electrodes of various arc lengths are studied to identify the most optimal electrode design configuration in order to achieve TSM vibration free from any anharmonic modes. Simulation results show that resonators with elliptical electrodes have noticeably better suppression of spurious modes compared to that of circular electrodes. Moreover, spurious mode suppression is accomplished for multiple electrode sizes for the same shape, which greatly differs from Mindlin's theory. Hence, three optimized designs are shortlisted and their mass loading sensitivities are investigated. Circular and elliptical electrodes of the same area show similar responses to added mass, indicating that elliptical electrodes have no apparent advantage over circular electrode in mass sensing applications.
|Number of pages||8|
|Journal||IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control|
|Publication status||Published - Sep 2019|
- Electrode design
- finite-element analysis
- langasite crystal
- spurious modes
- 1 Finished
Investigation into Graphene Integrated Langasite based Acoustic Coupled Resonators towards Devising Highly Sensitive Gas Sensors
Ramakrishnan, N., Chee Pin, T., Siang Piao, C. & Achath Mohanan, A.
15/08/17 → 14/08/19