A novel equivalent circuit model for CMUTs

Date

2009-09

Authors

Oğuz, H. Kağan
Olcum, Selim
Senlik, Muhammed N.
Atalar, Abdullah
Köymen, Hayrettin

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Abstract

A nonlinear equivalent circuit for immersed transmitting capacitive micromachined ultrasonic transducers (CMUTs) is presented. The velocity profile across the CMUT surface maintains the same form over a wide frequency range. This property and the profile are used to model both the electromechanical conversion and the mechanical section. The model parameters are calculated considering the root mean square of the velocity distribution on the membrane surface as the through variable. The new model is compared with the FEM simulation results. The new model predicts the CMUT performance very accurately. ©2009 IEEE.

Source Title

Proceedings - IEEE Ultrasonics Symposium

Publisher

IEEE

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Published Version (Please cite this version)

Language

English

Type

Conference Paper