NDLI: P2P-10 Electrostatic-Mechanical Direct Coupling and FEM-BEM Coupling for CMUT Electroacoustic Parameters Identification

Content Provider	IEEE Xplore Digital Library
Author	Ekeom, D.
Copyright Year	2006
Description	Author affiliation: Inst. d 'Electronique de Microelectronique et de Nanotechnologie, Departement ISEN, Lille (Ekeom, D.)
Abstract	Capacitive micromachined ultrasonic transducer (CMUT) arrays are seen as a promising way to improve ultrasound-imaging definition and they may supplant piezocomposite arrays for such applications. However, as a new technology it needs to be evaluated and modelling can help to design devices using cMUT technology. Implicit finite element codes are commonly used to model cMUT devices, but to take into account the fluid surrounding the device $radiation, scattering and the inter-mutual acoustic influence of the CMUT arrays cells - the boundary element method (BEM) coupled with the finite element method (FEM) can be advantageously used. Moreover the standard electromechanical coupling is either weak or lumped and cannot be used to model CMUT accurately. A FEM-BEM coupling together with an electro-mechanical direct coupling as add-on modules for ANSYSreg were developed. This paper will show how to identify exact nonlinear equivalent circuit lumped parameters from a FEM and FEM-BEM simulation. The electrical and motional branch of the circuit is identified by resonance and antiresonance modal analysis. The radiating impedance is computed using a FEM-BEM coupling in frequency domain. Finally the transducer insertion loss is evaluate
Starting Page	1971
Ending Page	1974
File Size	877133
Page Count	4
File Format	PDF
ISBN	1424402018
ISSN	10510117
DOI	10.1109/ULTSYM.2006.498
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-02
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Parameter estimation Ultrasonic transducer arrays Coupling circuits Finite element methods Ultrasonic transducers Ultrasonic imaging Acoustic scattering Acoustic devices Acoustic arrays Boundary element methods
Content Type	Text
Resource Type	Article

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