Browsing by Author "Taşdelen, Akif Sinan"

Now showing items 1-7 of 7

    • 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 ...

    • Designing efficient CMUT cells for airborne applications 

      Ünlügedik, Aslı; Taşdelen, Akif Sinan; Atalar, Abdullah; Köymen, Hayrettin (IEEE, 2014)
      In this work, we study airborne CMUT cells with vacuum gap where silicon plate is operated both in elastically linear and nonlinear regimes. We report the results of a new mode of operation where the plate center swings ...

    • High-Intensity airborne CMUT transmitter array with beam steering 

      Khan, Talha Masood; Taşdelen, Akif Sinan; Yılmaz, Mehmet; Atalar, Abdullah; Köymen, Hayrettin (IEEE, 2020)
      A 2×2 high-intensity CMUT transmit array that is capable of two-dimensional beam steering is presented. The device uses an ac drive voltage at half the ultrasound frequency without any dc bias, enabling the usage of the ...

    • Range resolution improvement in passive coherent location radar systems using multiple FM radio channels 

      Taşdelen, Akif Sinan; Köymen, Hayrettin (IET, 2006)
      Passive coherent location (PCL) radar systems that use single FM radio channel signal as illuminator of opportunity have limited range resolution due to low modulation bandwidth and high dependence on the content that is ...

    • Range resolution improvement in passive coherent location radar systems using multiple FM radio channels 

      Taşdelen, Akif Sinan (Bilkent University, 2007)
      Passive coherent location (PCL) radar systems that use single FM radio channel signal as illuminator of opportunity have reasonable Doppler resolution, but suffer from limited range resolution due to low modulation ...

    • 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 ...