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- W1558206276 abstract "In this study, radiation impedance of a capacitive micromachined ultrasonic transducer composed of square-shaped membranes arranged in m × m configuration (m = 1 - 5) is investigated using finite element analysis (FEA) of a commercially available software package(ANSYS). Radiation impedance is calculated for immersed membranes operating in conventional and collapse modes. Individual membrane response within the multi-membrane configuration is analyzed, and excited modes and their effects on radiation impedance and the pressure spectra are reported. This FEA provides an accurate behavior of the acoustic coupling of a thin membrane in a multi-membrane configuration, and extends above the anti-resonance frequency. The first resonance frequency of the membrane is excited for m × m (m ≥ 3) configuration in conventional mode and for m × m (m ≥ 2) configuration in collapse mode. Therefore, this frequency is determined to be responsible for the adverse effects observed in radiation impedance and pressure spectrum. A membrane configuration, which is missing the central membrane from the full m × m configuration is proposed, and is investigated with the FEA. This study is beneficial for the design of precise transducers suited for biomedical applications." @default.
- W1558206276 created "2016-06-24" @default.
- W1558206276 creator A5074310085 @default.
- W1558206276 date "2015-08-01" @default.
- W1558206276 modified "2023-09-23" @default.
- W1558206276 title "Radiation impedance study of a capacitive micromachined ultrasonic transducer by finite element analysis" @default.
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- W1558206276 doi "https://doi.org/10.1121/1.4923361" @default.
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