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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 ISSN 0001-4966.
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Official URL: http://dx.doi.org/10.1121/1.4802648
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 |
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| Divisions: | Faculty of Science, Engineering and Medicine > 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: |
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| 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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