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The wave-field from an array of periodic emitters driven simultaneously by a broadband pulse
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10.1121/1.4802648
/content/asa/journal/jasa/133/6/10.1121/1.4802648
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/6/10.1121/1.4802648

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Phased arrays showing the appropriate phase delays to generate different modalities.

Image of FIG. 2.
FIG. 2.

(Color online) An array where all the elements are in phase.

Image of FIG. 3.
FIG. 3.

(Color online) An alternative array configuration, where subsequent elements are in anti-phase with each other.

Image of FIG. 4.
FIG. 4.

Higher order diffraction terms start to overlap the lowest order mode at 19.5° for an alternating polarity array with six elements.

Image of FIG. 5.
FIG. 5.

(Color online) Out of plane wave displacement for the analytic model (left) and the FE simulations (right) 22.5 s after the array was pulsed.

Image of FIG. 6.
FIG. 6.

(Color online) Angular dependence of the center frequency of the wave-front shown in Fig. 5 .

Image of FIG. 7.
FIG. 7.

(Color online) Experimental excitation pulse.

Image of FIG. 8.
FIG. 8.

Diagram of the experimental setup.

Image of FIG. 9.
FIG. 9.

(Color online) Experimental data showing the angular dependence of the center frequency of wave-front.

Image of FIG. 10.
FIG. 10.

FE model geometry.

Image of FIG. 11.
FIG. 11.

(Color online) Example time domain signal from the FE model.

Image of FIG. 12.
FIG. 12.

(Color online) Normalized Fourier magnitude spectra of the scattered signal obtained from FE simulations. The dashed line represents the theoretical values from Eq. (10) . The overplotted circle represents the experimental data point.

Image of FIG. 13.
FIG. 13.

(Color online) Experimental signal after it has been integrated.

Tables

Generic image for table
TABLE I.

Array parameters used in Secs. II and III .

Generic image for table
TABLE II.

Array parameters used in Sec. IV .

Generic image for table
TABLE III.

The time domain pulses used to drive the arrays.

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/content/asa/journal/jasa/133/6/10.1121/1.4802648
2013-06-05
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The wave-field from an array of periodic emitters driven simultaneously by a broadband pulse
http://aip.metastore.ingenta.com/content/asa/journal/jasa/133/6/10.1121/1.4802648
10.1121/1.4802648
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