• About
  • Policies
  • What is openaccess
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
      • View Item
      •   BUIR Home
      • Scholarly Publications
      • Faculty of Engineering
      • Department of Electrical and Electronics Engineering
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Bandwidth improvement in a cMUT array with mixed sized elements

      Thumbnail
      View / Download
      278.4 Kb
      Author
      Bayram, Can
      Olcum, Selim
      Şenlik, Muhammed N.
      Atalar, Abdullah
      Date
      2005-09
      Source Title
      Proceedings - IEEE Ultrasonics Symposium
      Print ISSN
      1051-0117
      Publisher
      IEEE
      Pages
      1956 - 1959
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
      164
      views
      123
      downloads
      Abstract
      A capacitive micromachined ultrasonic transducer (cMUT) is typically fabricated by concatenation of several cMUT cells with identical physical dimensions. If the membrane thickness is kept fixed, the radius of the cMUT determines the center frequency of operation. A smaller radius implies a greater center frequency. Therefore, it should be possible to put cMUTs with different sizes in parallel to get a larger bandwidth at the expense of gain. In this study, we investigate the optimization of the bandwidth characteristics of a cMUT by using mixed size cells. We designed two mixed size cMUT arrays with a predicted optimized fractional bandwidth value of about 155% at 5.4 MHz, and 146% at 8.8 MHz. These values are about 55% and 58% better than what can be achieved with a uniform size array at the corresponding center frequencies. There is almost no loss in the gain bandwidth product when two different sized cMUTs are used in parallel. There is about 9% increase in gain bandwidth product when three different sized cMUTs are used in parallel. It is shown, in this study, that gain bandwidth product and bandwidth can be enhanced by use of mixed size cMUT cells. © 2005 IEEE.
      Keywords
      Bandwidth
      Gain measurement
      Natural frequencies
      Optimization
      Ultrasonic transducers
      Capacitive micromachined ultrasonic transducer (CMUT)
      Concatenation
      Gain bandwidth product
      Acoustic arrays
      Permalink
      http://hdl.handle.net/11693/27361
      Published Version (Please cite this version)
      https://doi.org/10.1109/ULTSYM.2005.1603258
      Collections
      • Department of Electrical and Electronics Engineering 3524
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartments

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 1771
      Copyright © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy