Nonlinear equivalent circuit model for circular CMUTs in uncollapsed and collapsed mode

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Nonlinear equivalent circuit model for circular CMUTs in uncollapsed and collapsed mode.pdf (970.64 KB)

Date

2012

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Source Title

2012 IEEE International Ultrasonics Symposium

Print ISSN

1948-5719

Electronic ISSN

Publisher

IEEE

Volume

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Pages

987 - 990

Language

English

Type

Conference Paper

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Abstract

An equivalent electrical circuit model valid for collapsed mode operation of CMUT is described. The across and through variables of the circuit model are chosen to be rms force and rms displacement over the surface of the CMUT membrane. The relation between rms displacement and applied voltage is obtained through analytical calculations utilizing the exact force distribution. The radiation impedance of collapsed mode CMUT is included as a load impedance in the circuit model. The resulting equivalent circuit is merged with uncollapsed mode model, to obtain a simulation tool that covers the whole operation range of CMUT. © 2012 IEEE.

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Keywords

Analytical calculation , Applied voltages , Circuit modeling , Equivalent electrical circuit model , Force distributions , Nonlinear equivalent circuit , Radiation impedance , RMS displacements , Circuit theory , Circuit simulation

Citation

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http://hdl.handle.net/11693/28106

item.page.isversionof

http://dx.doi.org/10.1109/ULTSYM.2012.0247

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Department of Electrical and Electronics Engineering
Department of Physics