Title :
Results on low-loss wideband ultrasonic transducers for non-invasive medical application
Author :
Souquet, J. ; Defranould, Ph.
Author_Institution :
Thomson-CSF, ASM Division, Cagnes-sur-Mer, France
Abstract :
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.
Keywords :
biomedical equipment; biomedical ultrasonics; piezoelectric transducers; ultrasonic transducers; biomedical US transducers; characteristics; disc transducers; low loss wideband US transducers; noninvasive medical diagnosis; piezoelectric transducers; quarter wave matching layers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780160
