Title :
Multilayer ceramics and composites for ultrasonic imaging arrays
Author :
Zipparo, M. ; Oakley, C. ; He, M.
Author_Institution :
Tetrad Corp., Englewood, CO, USA
Abstract :
This paper describes enhancing transducer performance by simultaneously improving both acoustical impedance matching between the piezoelectric material and the tissue being imaged and electrical impedance matching between the piezoelectric material and the system electronics. Transducers fabricated with multilayer composites show a 3 dB increase in TR amplitude, over a 6 dB improvement in insertion loss, and an 18% increase in bandwidth relative to similar ceramic transducers
Keywords :
composite materials; impedance matching; piezoceramics; ultrasonic imaging; ultrasonic transducer arrays; acoustical impedance matching; bandwidth; composites; electrical impedance matching; enhancing transducer performance; multilayer ceramics; piezoelectric material; system electronics; tissue; ultrasonic imaging arrays; Acoustic transducers; Ceramics; Impedance matching; Insertion loss; Nonhomogeneous media; Piezoelectric materials; Piezoelectric transducers; Ultrasonic imaging; Ultrasonic transducer arrays; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849145
