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A Spherically Focused Capacitive-Film Air-Coupled Transducer
AIP Conference Proceedings, 2006We have developed, fabricated, and tested spherically focused capacitive‐film air‐coupled ultrasonic transducers, which need no mirror, zone plate, or similar external device. To achieve native focusing, we have employed a flexible copper/polyimide backplate that permits a conformal fit to a spherical fixture whose radius determines the focal length ...
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THE DESIGN AND CHARACTERIZATION OF MICROMACHINED AIR-COUPLED CAPACITANCE TRANSDUCERS
Air coupled capacitance transducers have been manufactured using anisotropically etched silicon backplates and commercially available dielectric films (Kapton and Mylar). The small backplate pits which result from etching, provide well ordered and highly uniform air layers between the backplate surface and thin dielectric film.openaire +1 more source
Air-Coupled Ultrasonic Transducer for NDE
IEEE 1987 Ultrasonics Symposium, 1987openaire +1 more source
Advances in wide bandwidth air-coupled capacitance transducers
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IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2021
Xiongbing Li, Zhaojie Dai, Shuzeng Zhang
exaly
Xiongbing Li, Zhaojie Dai, Shuzeng Zhang
exaly
Broad Bandwidth Air-Coupled Micromachined Ultrasonic Transducers for Gas Sensing
Ultrasonics, 2021Dominique Certon +2 more
exaly
A new design of ultrasonic air-coupled ribbon transducer
A new design of air-coupled transducer has been developed and tested, based on a metallic ribbon design, The thin ribbon is held under tension within a magnetic field provided by rare-earth magnets and a set of pole peices, The device can act as a source or receiver at ultrasonic frequencies in air, with reasonable bandwidths.openaire +1 more source