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Computationally efficient sound field calculations for a circular array transducer.

C Lee1, P J Benkeser

  • 1Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

A new method efficiently calculates pressure distributions for circular phased array transducers. This approach accurately predicts array beam patterns, including grating lobes and main lobe width, validated by experimental data.

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Area of Science:

  • Acoustics
  • Engineering
  • Physics

Background:

  • Circular phased array transducers are crucial in various applications.
  • Accurate calculation of field pressure distributions is essential for transducer design and performance prediction.
  • Existing methods may lack computational efficiency or accuracy for complex geometries.

Purpose of the Study:

  • To develop a computationally efficient method for calculating field pressure distributions from circular phased array transducers.
  • To adapt the rectangular radiator approach for circular array geometries.
  • To validate the proposed method against experimental data.

Main Methods:

  • The rectangular radiator approach was modified for circular array elements.
  • Elements were divided into small rectangular areas for Fraunhofer approximation.
  • Superposition and coordinate transformations were used to calculate the array beam pattern.
  • Continuous wave or pulsed excitation signals were considered.

Main Results:

  • The method accurately predicts the location and amplitude of grating lobes.
  • Main lobe width can be predicted with reasonable accuracy.
  • The approach offers computational efficiency for pressure distribution calculations.
  • Validation against experimental data confirmed the method's efficacy.

Conclusions:

  • The modified rectangular radiator approach provides an efficient and accurate means to calculate field pressure distributions for circular phased arrays.
  • This method aids in the design and optimization of phased array systems.
  • The findings are significant for applications requiring precise acoustic field control.