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      Lumped element modeling of CMUT arrays in collapsed mode

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      Author
      Aydoğdu, Elif
      Özgürlük, A.
      Atalar, Abdullah
      Köymen, Hayrettin
      Date
      2014-09
      Source Title
      IEEE International Ultrasonics Symposium, IUS
      Publisher
      IEEE
      Pages
      309 - 312
      Language
      English
      Type
      Conference Paper
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      Abstract
      This study focuses on modeling collapsed modeoperation of CMUT arrays, and obtaining a small signal lumped element model for collapsed mode operation. Having the large signal model for single CMUT from previous studies, the mutual radiation impedance is presented for the collapsed mode, and a large signal model for a CMUT array is obtained for simulating the operation in both uncollapsed and collapsed modes. For faster computation, a small signal model for a CMUT cell is derived by linearizing the collapsed mode operation at a given bias point, and the computation time is reduced significantly. Using this model we are able to simulate a large array of collapsed CMUT cells. © 2014 IEEE.
      Keywords
      Acoustics
      Ultrasonics
      Bias points
      Computation time
      Large arrays
      Large signal modeling
      Lumped element model
      Mode operation
      Radiation impedance
      Small signal model
      Heterojunction bipolar transistors
      Permalink
      http://hdl.handle.net/11693/27763
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/ULTSYM.2014.0076
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      • Department of Electrical and Electronics Engineering 3524
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