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- W2043058591 abstract "A design is presented for a steerable parametric array that operates in the range of 40–60 kHz. The array design is based on three technologies: (1) Parametric array technology: the nonlinear interaction of two narrow high-frequency beams used to create a virtual endfire array with a very narrow beam at a much lower frequency; (2) Frequency-steered array design based on the ideas developed at Penn State University [Hughes and Thompson, J. Acoust. Soc. Am. 59, 1040 (1976)]; (3) Use of 1-3 piezocomposite as the active element of the array. The array is steered in two directions with minimum complexity of the required drive electronics. Steering along one axis is done by a simple change of primary frequencies, while steering along the other axis uses time-delay between elements. This allows the resulting parametric beam to be steered independently in two directions. The array is designed by discretizing the real and imaginary parts of the inverse DFT of the desired far-field patterns of the primaries. Scaling the 2-D DFT of the discretized array pattern allows an easy verification of the final array performance. Implementation issues, such as efficient element interconnection, drive electronics, and fabrication, will also be discussed." @default.
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- W2043058591 date "2001-05-01" @default.
- W2043058591 modified "2023-09-25" @default.
- W2043058591 title "Design of a steerable parametric‐mode array" @default.
- W2043058591 doi "https://doi.org/10.1121/1.4744229" @default.
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