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- W3136807865 abstract "We have proposed a phase-shift cancellation scheme to reduce the ring down period of ultrasonic transducers and increase axial resolutions. A piezoelectric micromachined ultrasonic transducer (pMUT) consisting of 80 elements with circular diaphragms of 415 μm in radius made of 2 μm-thick AlN layer has a measured resonant frequency of 160 kHz. The ring down period is minimized by emitting ten pulses followed by six additional pulses with a 180° phase difference. Results show the ring down period is shortened by 13% and 7.5% for a single element and the 80-element array, respectively. In addition, the axial distance sensing resolution is increased by 30% and 25% for the single element and the array structure, respectively. These results demonstrate the effectiveness of the proposed scheme for applications at a short distance and/or high axial resolution, including short-distance medical ultrasonic imaging, fingerprints, gesture identifications, and 3D imaging." @default.
- W3136807865 created "2021-03-29" @default.
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- W3136807865 date "2021-01-25" @default.
- W3136807865 modified "2023-10-16" @default.
- W3136807865 title "Improved Ring-Down Time and Axial Resolution of pMUTs via a Phase-Shift Excitation Scheme" @default.
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- W3136807865 doi "https://doi.org/10.1109/mems51782.2021.9375227" @default.
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