High-overtone self-focusing acoustic transducer for high frequency ultrasonic imaging

Hongyu Yu, Chuang Yuan Lee, Eun Sok Kim, Dawei Wu, Qifa Zhou, K. Kirk Shung

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish (US)
Title of host publication2007 IEEE Ultrasonics Symposium Proceedings, IUS
Number of pages4
StatePublished - 2007
Event2007 IEEE Ultrasonics Symposium, IUS - New York, NY, United States
Duration: Oct 28 2007Oct 31 2007

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117


Other2007 IEEE Ultrasonics Symposium, IUS
Country/TerritoryUnited States
CityNew York, NY


  • Component
  • Harmonic
  • Leadzirconate titanate (PZT)
  • Self-focusing acoustic transducers
  • Ultrasonic imaging

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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