Array Configuration to Eliminate Grating Lobes
A new configuration of ultrasound array transducers is proposed whose element boundaries interlock in a fine pattern to eliminate grating lobes from the acoustic field without using a very large number of array elements. Two dimensional acoustic fields produced by interlocking element 3.5 MHz array transducers are computer-simulated. These acoustic fields are compared with those from the corresponding conventional array transducer with straight-line element boundaries. The new configuration reduces grating lobe intensity by 20 dB in a round trip acoustic field and virtually eliminates grating lobes.
KeywordsPiezoelectric Material Acoustic Field Element Array Main Lobe Array Transducer
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- 1.S. Umemura and K. Katakura, “Theoretical analysis of grating lobe intensity”, 1986 IEEE Ultrasonic Symposium Proceedings, (1986), pp.659–662.Google Scholar
- 2.M. Okujima, “A method of grating lobe reduction for sector-scan linear array transducer”, Proceedings of Acoustical Society of Japan, (March 1984), pp.639–640 (in Japanese).Google Scholar
- 3.C. Nakaya, H. Takeuchi, K. Katakura, and A. Sakamoto, “Ultrasonic probe using composite piezoelectric materials”, 1982 IEEE Ultrasonic Symposium Proceedings, (1985), pp.634–636.Google Scholar
- 4.H. G. Nguyen, P. Hartemann, and D. Broussoux, “Single element and array PVDF transducers for acoustic imaging”, 1982 IEEE Ultrasonic Symposium Proceedings, (1982), pp.832–836.Google Scholar
- 5.K. Kimura, T. Miya, and H. Ohigashi, “Performance of a linear array transducer of vinylidene fluoride trifluoroethylene coploymer”, IEEE Transaction on Sonics and Ultrasonics, (1985), SU-32, 4, pp.566–573.Google Scholar