title: Modeling of CW annular arrays using limited diffraction Bessel beams.
abstract: 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.
authors.affiliation: Department of Engineering Science, University of Oxford, Summertown, United Kingdom. paul.fox@eng.ox.ac.uk
authors.forename: Paul D
authors.initials: PD
authors.lastname: Fox
authors.forename: Sverre
authors.initials: S
authors.lastname: Holm