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Reconfigurable mosaic annular arrays

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13 Author(s)
Thomenius, K. ; Massachusetts Inst. of Technol., Cambridge, MA, USA ; Wodnicki, R. ; Cogan, S. ; Fisher, R.
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Mosaic annular arrays (MAA) based on reconfigurable array (RA) transducer electronics assemblies are presented as a potential solution for future highly integrated ultrasonic transducer subsystems. Advantages of MAAs include excellent beam quality and depth of field resulting from superior elevational focus compared with 1-D electronically scanned arrays, as well as potentially reduced cost, size, and power consumption resulting from the use of a limited number of beamforming channels for processing a large number of subelements. Specific design tradeoffs for these highly integrated arrays are discussed in terms of array specifications for center frequency, element pitch, and electronic switch-on resistance. Large-area RAs essentially function as RC delay lines. Efficient architectures which take into account RC delay effects are presented. Architectures for integration of the transducer and electronics layers of large-area array implementations are reviewed.

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:61 ,  Issue: 7 )