Analysis of mutual acoustic coupling in CMUT arrays using an accurate lumped element nonlinear equivalent circuit model
Author
Oğuz, H.Kağan
Atalar, Abdullah
Köymen, Hayrettin
Date
2012Source Title
2012 IEEE International Ultrasonics Symposium
Print ISSN
1948-5719
Pages
983 - 986
Language
English
Type
Conference PaperItem Usage Stats
143
views
views
112
downloads
downloads
Abstract
We use an accurate nonlinear equivalent circuit model to analyze CMUT arrays with multiple cells, where every cell in the array is coupled to other cells at their acoustic terminals through a mutual radiation impedance matrix. We get results comparable to finite element analysis accuracy. Hence, the analysis of a large array becomes a circuit theory problem and can be scrutinized with circuit simulators. We study the mutual acoustic interactions that arise through the immersion medium due to the influence of the generated pressure field by each cell on the others. We compare the performance of different 1D cMUT arrays, where each element is half-wavelength wide and 10 and 20 wavelengths long at the resonance frequency of a single cell. © 2012 IEEE.
Keywords
Acoustic couplingAcoustic interaction
Circuit simulators
Element analysis
Immersion medium
Nonlinear equivalent circuit
Radiation impedance
Resonance frequencies
Cells
Circuit simulation
Circuit theory
Cytology
Permalink
http://hdl.handle.net/11693/28085Published Version (Please cite this version)
http://dx.doi.org/10.1109/ULTSYM.2012.0246Collections
Related items
Showing items related by title, author, creator and subject.
-
Transient analysis of nonlinear circuits by combining asymptotic waveform evaluation with volterra series
Celik, M.; Atalar, Abdullah; Tan, M. A. (Institute of Electrical and Electronics Engineers, 1995-08)A new method is proposed for the transient analysis of circuits with large number of linear lumped elements and lossy coupled transmission lines, and with few mildly nonlinear terminations. The method combines the ... -
Equivalent circuit-based analysis of CMUT cell dynamics in arrays
Oğuz, H. K.; Atalar, Abdullah; Köymen, Hayrettin (IEEE, 2013)Capacitive micromachined ultrasonic transducers (CMUTs) are usually composed of large arrays of closely packed cells. In this work, we use an equivalent circuit model to analyze CMUT arrays with multiple cells. We study ... -
Nonlinear equivalent circuit model for circular CMUTs in uncollapsed and collapsed mode
Aydoğdu, Elif; Özgürlük, Alper; Oğuz, H. Kağan; Atalar, Abdullah; Kocabaş, Coşkun; Köymen, Hayrettin (IEEE, 2012)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 ...