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 language | English |
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Pages (from-to) | 1089-1094 |
Number of pages | 6 |
Journal | Key Engineering Materials |
Volume | 270-273 |
Issue number | II |
DOIs | |
State | Published - 2004 |
Event | Proceedings of the 11th Asian Pacific Conference on Nondestructive Testing - Jeju Island, Korea, Republic of Duration: 3 Nov 2003 → 7 Nov 2003 |
Keywords
- Micro-machined planar array
- Optimization
- Ultrasonic transducer