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- W3097895822 abstract "Background:: Ultrasound is widely used in the applications of underwater imaging. Capacitive micromachined ultrasonic transducer (CMUT) is a promising candidate for the traditional piezoelectric ultrasonic transducer. In underwater ultrasound imaging, better resolutions can be achieved with a higher frequency ultrasound. Therefore, a CMUT array for high-frequency ultrasound imaging is proposed in this work. Methods:: Analytical methods were used to calculate the center frequency in water and the pull-in voltage for determining the operating point of CMUT. A finite element method model was developed to finalize the design parameters. The CMUT array was fabricated with a five-mask sacrificial release process. Results:: The CMUT array owned an immersed center frequency of 2.6 MHz with a 6 dB fractional bandwidth of 123 %. The pull-in voltage of the CMUT array was 85 V. An underwater imaging experiment was carried out with the target of three steel wires. Conclusion:: In this study, we have developed CMUT for high-frequency underwater imaging. The experiment showed that the CMUT could detect the steel wires with a diameter of 100 μm and the axial resolution was 0.582 mm, which was close to one wavelength of ultrasound in 2.6 MHz" @default.
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- W3097895822 date "2021-02-18" @default.
- W3097895822 modified "2023-10-16" @default.
- W3097895822 title "Design and Experiment of Capacitive Micromachined Ultrasonic Transducer Array for High-frequency Underwater Imaging" @default.
- W3097895822 doi "https://doi.org/10.2174/2352096513999201026225123" @default.
- W3097895822 hasPublicationYear "2021" @default.
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