Electrical impedance mismatch in capacitive micromachined ultrasonic transducers

Several investigations on the electrical impedance mismatch, the insertion loss and the noise performance of capacitive micromachined ultrasonic transducers (cMUTs) are reported. The theoretical analysis applies the concepts of radio communication circuits to the analytical modeling of a two-way sys...

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Bibliographic Details
Main Authors: Caronti, A., Caliano, G., Iula, A., Pappalardo, M.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic devices
Biomedical acoustics
Biomembranes
Circuit simulation
Impedance
Insertion loss
Performance loss
Transfer functions
Ultrasonic imaging
Ultrasonic transducers
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Summary:Several investigations on the electrical impedance mismatch, the insertion loss and the noise performance of capacitive micromachined ultrasonic transducers (cMUTs) are reported. The theoretical analysis applies the concepts of radio communication circuits to the analytical modeling of a two-way system made of a transmitting cMUT and a receiving one. Since the simulation results can emphasize the effects of either the transmitting and receiving electronics or the characteristics of the transducers on the performance of the system, the proposed approach is very useful for the purpose of optimization. For example, a selection between receivers can be easily done as a trade-off between the insertion loss and the noise sensitivity of the system.
ISSN:1051-0117
DOI:10.1109/ULTSYM.2000.922692