Equivalent circuit-based analysis of CMUT cell dynamics in arrays
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
MetadataShow full item record
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/20962
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 the effects of mutual acoustic interactions through the immersion medium caused by the pressure field generated by each cell acting upon the others. To do this, all the cells in the array are coupled through a radiation impedance matrix at their acoustic terminals. An accurate approximation for the mutual radiation impedance is defined between two circular cells, which can be used in large arrays to reduce computational complexity. Hence, a performance analysis of CMUT arrays can be accurately done with a circuit simulator. By using the proposed model, one can very rapidly obtain the linear frequency and nonlinear transient responses of arrays with an arbitrary number of CMUT cells. We performed several finite element method (FEM) simulations for arrays with small numbers of cells and showed that the results are very similar to those obtained by the equivalent circuit model. © 1986-2012 IEEE.
- Research Paper 7144
Showing items related by title, author, creator and subject.
Bilateral CMUT cells and arrays: Equivalent circuits, diffraction constants, and substrate impedance Koymen H.; Atalar A.; Tasdelen A.S. (Institute of Electrical and Electronics Engineers Inc., 2017)We introduce the large-signal and small-signal equivalent circuit models for a capacitive micromachined ultrasonic transducer (CMUT) cell, which has radiating plates on both sides. We present the diffraction coefficient ...
Köymen H.; Atalar, A.; Aydoǧdu, E.; Kocabaş, C.; Oǧuz H.K.; Olçum, S.; Ozgurluk, A.; Ünlügedik, A. (2012)This paper describes a correction and an extension in the previously published large signal equivalent circuit model for a circular capacitive micromachined ultrasonic transducer (CMUT) cell. The force model is rederived ...
Ozbey B.; Altintas, A.; Demir H.V.; Erturk V.B. (Institute of Electrical and Electronics Engineers Inc., 2017)In this paper, an equivalent circuit model for nested split-ring resonators (NSRRs) is proposed. NSRRs are an emerging class of split ring resonators, preferred in a range of areas from sensing in biomedical or civil ...