Optimal design of a planar array of micro-machined ultrasonic transducers

Susung Lee, Yongrae Roh

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Linear phased array transducers that can scan planar images of a structure dominate current ultrasound imaging systems. Recently, two-dimensional phased array transducers get much attention for being capable of symmetrically focusing an ultrasound beam as well as steering the focused beam throughout a three-dimensional volume. This paper describes the development of a new design method for the optimal structure of a planar array of micro-machined ultrasonic transducers. The developed method takes in account of the sidelobe level, -6dB and -30dB beam area, the maximum dimension in the -6 dB and -30dB beam area, on-axis response, grating lobe, and main lobe ripple in the two-way radiation pattern of a 2D array transducer. The method does not take any presumption and directly analyzes the radiation pattern of a planar array to find the optimal pattern of the active elements in the transducer. Validity of the optimization was confirmed through the exhaustive optimization method.

Original languageEnglish
Pages (from-to)1089-1094
Number of pages6
JournalKey Engineering Materials
Volume270-273
Issue numberII
DOIs
StatePublished - 2004
EventProceedings of the 11th Asian Pacific Conference on Nondestructive Testing - Jeju Island, Korea, Republic of
Duration: 3 Nov 20037 Nov 2003

Keywords

  • Micro-machined planar array
  • Optimization
  • Ultrasonic transducer

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