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      Analysis of mutual acoustic coupling in CMUT arrays using an accurate lumped element nonlinear equivalent circuit model

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      Author
      Oğuz, H.Kağan
      Atalar, Abdullah
      Köymen, Hayrettin
      Date
      2012
      Source Title
      2012 IEEE International Ultrasonics Symposium
      Print ISSN
      1948-5719
      Pages
      983 - 986
      Language
      English
      Type
      Conference Paper
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      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 coupling
      Acoustic 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/11693/28085
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/ULTSYM.2012.0246
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      • Department of Electrical and Electronics Engineering 3524
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