Results on low-loss wideband ultrasonic transducers for non-invasive medical application

Results on low-loss wideband ultrasonic transducers for non-invasive medical application

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A new design for disc transducers with good efficiency and large bandwidth is presented here. The design method is based on the use of quarter-wave matching layers between the piezoelectric ceramic and the load, and the use of a quarter-wave unmatching layer between the same ceramic and its high acoustic impedance backing. Experimental and theoretical results are presented.


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