Now showing items 1-11 of 11

    • Acoustical tuning of CMUT receiver arrays 

      Taşdelen, Akif Sinan; Atalar, Abdullah; Enhoş, Kerem; Köymen, Hayrettin (IEEE, 2016)
      Cell placement in an element and structural modifications on the array baffle significantly change the bandwidth, band shape and signal to noise ratio of a CMUT receiver array. In this paper, optimum receiver performance ...
    • Beam steering in a half-frequency driven airborne CMUT transmitter array 

      Khan, Talha Masood; Taşdelen, Akif Sinan; Yılmaz, Mehmet; Atalar, Abdullah; Köymen, Hayrettin (IEEE Computer Society, 2019)
      An airborne Capacitive Micromachined Ultrasonic Transducer (CMUT) transmit array was designed using electromechanical modelling for unbiased airborne operation. The array elements are designed for maximum swing at 10V p-p ...
    • Circuit theory based modeling and analysis of CMUT arrays 

      Oğuz, Hüseyin Kağan (Bilkent University, 2013)
      Many ultrasonic technology applications require capacitive micromachined ultrasonic transducers (CMUTs) to be used in the form of large arrays to attain better performance in terms of powerful, broadband and beam-formed ...
    • Deep collapse mode capacitive micromachined ultrasonic transducers 

      Olçum, Selim (Bilkent University, 2010)
      Capacitive micromachined ultrasonic transducers (CMUTs) are suspended microelectromechanical membrane structures with a moving top electrode and a rigid substrate electrode. The membrane is actuated by electrical signals ...
    • Electrically unbiased and half frequency driven waterborne 16×16-element 2-D phased array CMUT 

      Enhoş, Kerem (Bilkent University, 2019-09)
      Capacitive micromachined ultrasonic transducers (CMUT) are typically used as arrays consisting of separate cells or interconnected sub arrays, and these cells have several operation modes. Design procedure and ...
    • A micromachined pressure sensor 

      Karaca, Hasan (Bilkent University, 2017-10)
      Capacitive Micromachined Ultrasonic Transducer (CMUT) is a microelectromechanical device that is basically formed by a moving top electrode, a stable bottom electrode and a gap in between. In spite of its this simple ...
    • Nonlinear modelling of an immersed transmitting capacitive micromachined ultrasonic transducer for harmonic balance analysis 

      Oğuz, Hüseyin Kağan (Bilkent University, 2009)
      Finite element method (FEM) is used for transient dynamic analysis of capacitive micromachined ultrasonic transducers (CMUT), which is particularly useful when the membranes are driven in the nonlinear regime. A transient ...
    • Optimization of a collapsed mode CMUT receiver for maximum off-resonance sensitivity 

      Khan, M.; Khan, T. M.; Taşdelen, A. S.; Yilmaz, M.; Atalar, Abdullah; Köymen, Hayrettin (Institute of Electrical and Electronics Engineers, 2018-07-28)
      We propose an airborne collapse capacitive micromachined ultrasonic transducer (CMUT) as a practical viable ultrasound transducer capable of providing a stable performance at the off-resonance frequencies. Traditional ...
    • A transimpedance amplifier for capacitive micromachined ultrasonic transducers 

      Kansu, Yavuz (Bilkent University, 2015-12)
      In this thesis a design of a CMOS transimpedance amplifier (TIA) for a capacitive micro-machined ultrasonic transducer (CMUT) is presented. CMUT’s have a high electrical impedance when used as receivers. Any capacitance ...
    • Transmitting CMUT arrays without a DC bias 

      Enhoş, Kerem; Taşdelen, Akif Sinan; Yılmaz, Mehmet; Atalar, Abdullah; Köymen, Hayrettin (IEEE Computer Society, 2019)
      This study focuses on design, simulation, fabrication and measurement of transmitting CMUT arrays with unbiased mode of operation. We presented a design procedure considering the radiation pattern, Rayleigh distance and ...
    • Unbiased charged circular CMUT microphone: lumped-element modeling and performance 

      Köymen, Hayrettin; Atalar, Abdullah; Güler, S.; Köymen, I.; Taşdelen, A. S.; Ünlügedik, A. (Institute of Electrical and Electronics Engineers, 2018)
      An energy-consistent lumped-element equivalent circuit model for charged circular capacitive micromachined ultrasonic transducer (CMUT) cell is derived and presented. It is analytically shown and experimentally verified ...