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Now showing items 1-10 of 15
Circuit theoretical method for efficient finite element analysis of acoustical problems
(IEEE, 1998)
In the last decade, there has been an outstanding improvement in the computer aided design tools for VLSI circuits regarding solution times and the circuit complexity. This study proposes formulating the acoustic field ...
Deep-collapse operation of capacitive micromachined ultrasonic transducers
(IEEE, 2011)
Capacitive micromachined ultrasonic transducers (CMUTs) have been introduced as a promising technology for ultrasound imaging and therapeutic ultrasound applications which require high transmitted pressures for increased ...
Interaction between a cMUT cell and a liquid medium around the parallel resonance frequency
(IEEE, 2007-10)
In this paper, we present how a capacitive micromachined ultrasonic transducer (cMUT) couples to the immersion medium, based on an accurate parametric model. We show that the velocity of cMUT membrane can be written as a ...
Modeling the effect of subsurface interface defects on contact stiffness for ultrasonic atomic force microscopy
(AIP Publishing LLC, 2004)
We present a model predicting the effects of mechanical defects at layer interfaces on the contact
stiffness measured by ultrasonic atomic force microscopy sAFMd. Defects at subsurface interfaces
result in changes at the ...
Silicon micromachined ultrasonic immersion transducers
(A I P Publishing LLC, 1996-12-09)
Broadband transmission of ultrasound in water using capacitive, micromachined transducers is reported. Transmission experiments using the same pair of devices at 4, 6, and 8 MHz with a signal‐to‐noise ratio greater than ...
A new detection method for capacitive micromachine ultrasonic transducers
(IEEE, 2001)
Capacitive micromachine ultrasonic transducers (cMUT) have become an alternative to piezoelectric transducers in the past few years. They consist of many small circular membranes that are connected in parallel. In this ...
Radiation impedance of an array of circular capacitive micromachined ultrasonic transducers
(IEEE, 2010)
The radiation impedance of a capacitive micromachined ultrasonic transducer (cMUT) with a circular membrane is calculated analytically using its velocity profile for the frequencies up to its parallel resonance frequency ...
Radiation impedance and equivalent circuit for immersed CMUT array element
(IEEE, 2006-10)
In this paper, we present equivalent circuit for immersed capacitive micromachined ultrasonic transducers (cMUT), based on an accurate parametric model. We also present an accurate approximation for the radiation impedance ...
A novel equivalent circuit model for CMUTs
(IEEE, 2009-09)
A nonlinear equivalent circuit for immersed transmitting capacitive micromachined ultrasonic transducers (CMUTs) is presented. The velocity profile across the CMUT surface maintains the same form over a wide frequency ...
Optimizing CMUT geometry for high power
(IEEE, 2010)
Capacitive micromachined ultrasonic transducers (CMUTs) have demonstratedvarious advantages over piezoelectric transducers. However, current CMUT designsproduce low output pressures with high harmonic distortions. Optimizing ...