@inproceedings{513e0ef356d04c20a1915392e8b65e51,
title = "High-overtone self-focusing acoustic transducer for high frequency ultrasonic imaging",
abstract = "This paper reports the use of high-overtone selffocusing acoustic transducers for high frequency ultrasonic imaging application. For an acoustic transducers working for ultrasonic imaging, the resolution is primarily determined by the acoustic wavelength, which is normally proportional to the piezoelectric substrate thickness. Using a harmonic frequency of a bulk PZT with a novel Fresnel lens based on air-reflectors for a focused acoustic beam, we reduce the wavelength and obtain strong signals at the center frequencies of the 3rd (60MHz) and 5th (100MHz) harmonics for ultrasonic imaging. The bandwidth at -6dB was over 20 %, even without a front matching layer.",
keywords = "Component, Harmonic, Leadzirconate titanate (PZT), Self-focusing acoustic transducers, Ultrasonic imaging",
author = "Hongyu Yu and Lee, {Chuang Yuan} and Kim, {Eun Sok} and Dawei Wu and Qifa Zhou and Shung, {K. Kirk}",
note = "Copyright: Copyright 2008 Elsevier B.V., All rights reserved.; 2007 IEEE Ultrasonics Symposium, IUS ; Conference date: 28-10-2007 Through 31-10-2007",
year = "2007",
doi = "10.1109/ULTSYM.2007.604",
language = "English (US)",
isbn = "1424413834",
series = "Proceedings - IEEE Ultrasonics Symposium",
pages = "2401--2404",
booktitle = "2007 IEEE Ultrasonics Symposium Proceedings, IUS",
}