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The wave-field from an array of periodic emitters driven simultaneously by a broadband pulse

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Dixon, S., Hill, Samuel Joseph, Fan, Yichao and Rowlands, G. (George) (2013) The wave-field from an array of periodic emitters driven simultaneously by a broadband pulse. The Journal of the Acoustical Society of America, Volume 133 (Number 6). Article number 3692. doi:10.1121/1.4802648

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Official URL: http://dx.doi.org/10.1121/1.4802648

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Abstract

The use of phased array methods are commonplace in ultrasonic applications, where controlling the variation of the phase between the narrowband emitters in an array facilitates beam steering and focusing of ultrasonic waves. An approach is presented here whereby emitters of alternating polarity arranged in a one-dimensional array are pulsed simultaneously, and have sufficiently wide, controlled bandwidth to emit a two-dimensional wave. This pulsed approach provides a rapid means of simultaneously covering a region of space with a wave-front, whereby any wave that scatters or reflects off a body to a detector will have a distinct arrival time and frequency. This is a general wave phenomenon with a potential application in radar, sonar, and ultrasound. The key result is that one can obtain a smooth, continuous wave-front emitted from the array, over a large solid angle, whose frequency varies as a function of angle to the array. Analytic and finite element models created to describe this phenomenon have been validated with experimental results using ultrasonic waves in metal samples

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Ultrasonic waves, Phased array antennas, Pulse techniques (Electronics)
Journal or Publication Title: The Journal of the Acoustical Society of America
Publisher: Acoustical Society of America
ISSN: 0001-4966
Official Date: June 2013
Dates:
DateEvent
June 2013Published
Volume: Volume 133
Number: Number 6
Page Range: Article number 3692
DOI: 10.1121/1.4802648
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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