Experimental Study of Phased Array Beam Steering Characteristics |
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Authors: | Arthur C Clay Shi-Chang Wooh Lawrence Azar Ji-Yong Wang |
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Affiliation: | (1) Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 |
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Abstract: | The influence of several geometric parameters of linear phased arrays was studied. A systematic approach using an automated testing assembly was used to assess the steering performance of the array in a solid medium. In addition to calibrating the transducer with respect to its steering accuracy, this arrangement provided a detailed study of the effects of steering angle, number of elements, inter-element spacing and array aperture on the beam directivity. The experimental results show good agreement quantitatively with the predicted steering characteristics. |
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Keywords: | ultrasonic nondestructive evaluation linear phased arrays transducer characterization beam directivity steering calibration |
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