Results 21 to 30 of about 2,164 (196)
An Investigation of Silica Aerogel to Reduce Acoustic Crosstalk in CMUT Arrays
Sensors, 2021 This paper presents a novel technique to reduce acoustic crosstalk in capacitive micromachined ultrasonic transducer (CMUT) arrays. The technique involves fabricating a thin layer of diisocyanate enhanced silica aerogel on the top surface of a CMUT array.
Varshitha Yashvanth, Sazzadur Chowdhury
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Micromachines, 2022 Capacitive micromachined ultrasonic transducers (CMUT) are MEMS-based transducers with advantages over conventional ultrasonic transducers, such as their small size, the ease of integration with semiconductor electronics, and batch fabrication.
Chirag Goel +2 more
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Rayleigh–bloch waves in CMUT arrays [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2014 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 computationally efficient method to predict the frequency response of a large CMUT element or array.
Atalar, A., Köymen H., Oğuz H.
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Pull-in Analysis of CMUT Elements
2020 IEEE International Ultrasonics Symposium (IUS), 2020 This paper presents a novel characterization method for the pull-in voltage of a Capacitive Micromachined Ultrasonic Transducer (CMUT) element. The presented method allows pull-in estimation of all CMUT cells contained in an element, which is in contrast to conventional methods that only allows for a pull-in average across an element.
Havreland, Andreas Spandet +3 more
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Development of 4G CMUT (CMUT Linear SML44 probe) [PDF]
Advanced Ultrasound in Diagnosis and Therapy, 2020 In 2009, Hitachi commercialized “Mappie*1, the world’s first Capacitive Micro-machined Ultrasound Transducer (CMUT) using semiconductor based technology.
Tsuyoshi Otake, Hiroki Tanaka, Akifumi Sako, Makoto Fukada, Kengo Imagawa, Masahiro Sato
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Designing transmitting CMUT cells for airborne applications [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2014 We report a new mode of airborne operation for capacitive micromachined ultrasonic transducers (CMUT), in which the plate motion spans the entire gap without collapsing and the transducer is driven by a sinusoidal voltage without a dc bias. We present equivalent-circuit-based design fundamentals for an airborne CMUT cell and verify the design targets ...
Unlugedik, A. +3 more
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CMUT array element in deep-collapse mode [PDF]
2011 IEEE International Ultrasonics Symposium, 2011 Collapse and deep-collapse mode of operations have boosted the pressure outputs of capacitive micromachined ul- trasonic transducers (CMUTs) considerably. In this work, we demonstrate a CMUT element operating in the deep-collapse mode with 25 V pulse excitation and without the effects of charge trapping.
Olcum, Selim +4 more
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Forward-viewing CMUT arrays for medical imaging
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2004 This paper reports the design and testing of forward-viewing annular arrays fabricated using capacitive micromachined ultrasonic transducer (CMUT) technology. Recent research studies have shown that CMUTs have broad frequency bandwidth and high-transduction efficiency.
Demirci, Utkan +4 more
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Characterization of a CMUT Array
, 2012 Ultrasound transducers are used in a broad range of applications covering from underwater communications to medical imaging and treatment. The ultrasonic transducer determines the key specifications such as resolution, sensitivity and signal to noise ratio.
Zure, Tugrul
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Echographic Images Improvements with a CMUT Probe
, 2007 The validity of cMUT (capacitive Micromachined Ultrasonic Transducer) technology for medical imaging applications has been proved by many authors. The large bandwidth obtained with cMUT leads to improved image resolution compared to their piezoelectric counterpart. Recently, our laboratory (Aculab) has developed a flexible cMUT technology (the “Reverse”
CALIANO, Giosue' +5 more
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