Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Hayrettin Koymen"'
Publikováno v:
Journal of Microelectromechanical Systems
A $2\times 2$ 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 entire gap height. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfc37038eecc1f32df887eef8f2fc6ea
https://doi.org/10.1109/jmems.2020.3026094
https://doi.org/10.1109/jmems.2020.3026094
Publikováno v:
Journal of Micromechanics and Microengineering
Mechanically coupled resonators usually require a mechanical coupling element; this introduces additional complexity to the picture. We propose a novel modeling and design approach, followed by experimental verification, for mechanically coupled clam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::842e30378bd0c0d7fdf895d22b6e2509
https://hdl.handle.net/11693/77124
https://hdl.handle.net/11693/77124
Autor:
Akif Sinan Tasdelen, Mehmet Yilmaz, Hayrettin Koymen, Talha M. Khan, Mansoor Khan, Abdullah Atalar
Publikováno v:
Journal of Microelectromechanical Systems
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 practice is to bias the CMUT pla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a39c826f684057e7fa5747de422f93d
https://doi.org/10.1109/jmems.2018.2857444
https://doi.org/10.1109/jmems.2018.2857444
Autor:
A. Sinan Tasdelen, Saadettin Guler, Abdullah Atalar, Hayrettin Koymen, Itir Koymen, Asli Unlugedik
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
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 that a series dc voltage sourc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9367fe5024db450ae0818f872a89f17
https://doi.org/10.1109/tuffc.2017.2773490
https://doi.org/10.1109/tuffc.2017.2773490
Bilateral CMUT Cells and Arrays: Equivalent Circuits, Diffraction Constants, and Substrate Impedance
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
We introduce the large-signal and small-signal equivalent circuit models for a capacitive micromachined ultrasonic transducer (CMUT) cell, which has radiating plates on both sides. We present the diffraction coefficient of baffled and unbaffled CMUT
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0ef3720041a027ead5ecb03159777d3
https://doi.org/10.1109/tuffc.2016.2628882
https://doi.org/10.1109/tuffc.2016.2628882
Publikováno v:
IEEE International Ultrasonics Symposium, IUS 2019
Date of Conference: 6-9 October 2019 Conference Name: 2019 IEEE International Ultrasonics Symposium, IUS 2019 An airborne Capacitive Micromachined Ultrasonic Transducer (CMUT) transmit array was designed using electromechanical modelling for unbiased
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08210311e394bfa5ec4a677b23c19a35
https://doi.org/10.1109/ultsym.2019.8925995
https://doi.org/10.1109/ultsym.2019.8925995
Publikováno v:
IEEE International Ultrasonics Symposium, IUS 2019
Date of Conference: 6-9 October 2019 Conference Name: 2019 IEEE International Ultrasonics Symposium, IUS 2019 This study focuses on design, simulation, fabrication and measurement of transmitting CMUT arrays with unbiased mode of operation. We presen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48160dd5ec3f03a51303d5abbe5c82ad
https://doi.org/10.1109/ultsym.2019.8926278
https://doi.org/10.1109/ultsym.2019.8926278
Publikováno v:
Proceedings of Meetings on Acoustics
Date of Conference: 5-9 Nov. 2018 Conference name: 176th Meeting of Acoustical Society of America - 2018 Acoustics Week in Canada The main objective of this study is to obtain improved detection of 50 μm breast microcalcifications in ultrasound mamm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::834f4f681f8a5eaf4bf7ed83bfc35483
https://hdl.handle.net/11693/50314
https://hdl.handle.net/11693/50314
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IEEE Trans on Ultrasonics, Ferroelectrics and Frequency Cont
IEEE Trans on Ultrasonics, Ferroelectrics and Frequency Cont
Cataloged from PDF version of article. Using the small-signal electrical equivalent circuit of a capacitive micromachined ultrasonic transducer (CMUT) cell, along with the self and mutual radiation impedances of such cells, we present a computational
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6c46116f8abcd1c274d749c218b009e
https://doi.org/10.1109/tuffc.2014.006610
https://doi.org/10.1109/tuffc.2014.006610
Autor:
Hayrettin Koymen, Yasin Kumru
Publikováno v:
The Journal of the Acoustical Society of America. 144:1888-1888
In this paper, the experimental results of using Golay coded signals at 7.5 MHz to detect breast microcalcifications of 50 μm size is presented. For improving the success on detecting the microcalcifications, orthogonal Golay complementary sequences
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddf22fc1f14d84bdbbd2659ce372e314
https://doi.org/10.1121/1.5068277
https://doi.org/10.1121/1.5068277