Radiation Impedance of Rectangular CMUTs
Abstract
:1. Introduction
2. Background
3. Methods
3.1. Velocity Profile
3.2. FEM Validation
Approximate Velocity Profile of Long Rectangular Membranes
4. Radiation Impedance Integral
5. Results
5.1. Circular CMUT
5.2. Rectangular CMUT
MAE at Low DC Bias ( | MAE at High DC Bias ( | |||
---|---|---|---|---|
Plate | ||||
Circular 1 | 0.33 | 0.37 | 0.69 | 0.74 |
Rectangular with | 0.89 | 1.12 | 0.38 | 0.23 |
Rectangular with | 3.53 | 1.60 | 3.57 | 3.14 |
Rectangular with | 3.78 | 1.40 | 5.13 | 4.25 |
Rectangular with | 2.96 | 1.34 | 5.30 | 4.94 |
Rectangular with (1D approximation) | 2.46 | 1.25 | 4.67 | 4.67 |
5.3. Long Rectangular CMUT 1D Approximation
6. Discussion
7. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Appendix A. Change in Variables for Integration
Appendix B. 1D Velocity Profile Approximation for Long Rectangular Plates
References
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Low DC Bias | High DC Bias | |||
---|---|---|---|---|
Aspect Ratio (b/a) | ARE | Frequency [MHz] | ARE | Frequency [MHz] |
1 | 0.57% | 3.17 | 1.39% | 2.0 |
4 | 9.36% | 2.0 | 3.05% | 1.26 |
10 | 14.56% | 1.97 | 2.33% | 1.178 |
25 | 20.04% | 1.973 | 10.45% | 1.19 |
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Khorassany, S.; Dew, E.B.; Rahim Sobhani, M.; Zemp, R.J. Radiation Impedance of Rectangular CMUTs. Sensors 2024, 24, 5823. https://doi.org/10.3390/s24175823
Khorassany S, Dew EB, Rahim Sobhani M, Zemp RJ. Radiation Impedance of Rectangular CMUTs. Sensors. 2024; 24(17):5823. https://doi.org/10.3390/s24175823
Chicago/Turabian StyleKhorassany, Shayan, Eric B. Dew, Mohammad Rahim Sobhani, and Roger J. Zemp. 2024. "Radiation Impedance of Rectangular CMUTs" Sensors 24, no. 17: 5823. https://doi.org/10.3390/s24175823