Modeling of CW annular arrays using limited diffraction Bessel beams.
We present a method for characterizing the linear field of any flat, continuous-wave annular array in terms of a set of known limited-diffraction Bessel beams. The technique uses Fourier-Bessel series to model the surface pressure of the transducer surface, with each term in the series giving rise to a Bessel beam with known propagation parameters. The analysis is applied numerically to two different transducers discussed previously in the literature. In both cases, a deeper understanding of the field emitted than was previously available is gained. Brief outlines for extending the technique to pulsed wave and non-annular arrays are also given.
Fox
Paul D
PD
Department of Engineering Science, University of Oxford, Summertown, United Kingdom. paul.fox@eng.ox.ac.uk
Holm
Sverre
S