Abstract

ABSTRACT Methods for fabricating and modeling of a high frequency linear ultrasonic array are presented. This array was designed primarily for human eye imaging, and features elements mechanically diced out of a fine grain high density PZT-5H ceramic. Array elements were spaced with a 50 micron pitch, interconnected via a flexible circuit and matched to the 50 Ohm system electronics via a 85 Ohm transmission line coaxial cable. The current array design was based upon tradeoffs between the time domain response bandwidth and sensitivity, as well as, the level of array encapsulation and suppression acoustic crosstalk. A prototype four element array was constructed with promising results. An average center frequency of 34 MHz with a -6 dB bandwidth of at least 45% per element was achieved with a 20 dB pulse length of 105 ns. The array performance was compared to a time domain finite element analysis program and excellent agreement between theory and experiment was achieved. Keywords: High frequency ultrasound, linear array, fine grain piezoelectric ceramic, finite element analysis

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.