Design of a 50 MHz annular array using fine-grain lead titanate

Kevin A. Snook, Thomas R. Shrout, K. Kirk Shung

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

A 50 MHz annular array with six equal-area elements was designed. A novel fine-grain, 1-2 micron particle size, lead titanate was used as the piezoelectric material. The full set of electromechanical properties was calculated using resonance techniques. The low permittivity (εs330 = 180) of the lead titanate allowed a larger overall diameter when matching to 50 ohm electronics, which kept the aspect ratio (width/height) of all the elements above 3. Laser micromachining was used to fully separate the array elements, and a double matching layer scheme was used to acoustically match the device. The array was modeled using both one-dimensional (KLM) and finite element modeling (PZFlex), and good agreement between the two was obtained. Using a broadband excitation, a center frequency of 51 MHz was obtained on the echo reflected from a flat reflector, with an insertion loss of 18 dB and a bandwidth of 50%. Maximum calculated cross-talk values were below -30 dB between elements.

Original languageEnglish (US)
Pages (from-to)91-98
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4687
DOIs
StatePublished - Jan 1 2002
EventMedical Imaging 2002: Ultrasonic Imaging and Signal Processing - San Diego, CA, United States
Duration: Feb 26 2002Feb 28 2002

Fingerprint

Piezoelectric materials
Micromachining
Insertion losses
Aspect ratio
Permittivity
Electronic equipment
Lead
Particle size
Bandwidth
Lasers
laser machining
Piezoelectric Material
Finite Element Modeling
Crosstalk
Reflector
Particle Size
insertion loss
Aspect Ratio
Broadband
reflectors

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Snook, Kevin A. ; Shrout, Thomas R. ; Shung, K. Kirk. / Design of a 50 MHz annular array using fine-grain lead titanate. In: Proceedings of SPIE - The International Society for Optical Engineering. 2002 ; Vol. 4687. pp. 91-98.
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Design of a 50 MHz annular array using fine-grain lead titanate. / Snook, Kevin A.; Shrout, Thomas R.; Shung, K. Kirk.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4687, 01.01.2002, p. 91-98.

Research output: Contribution to journalConference article

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