Spherical-wave expansions of piston-radiator fields.
Simple spherical-wave expansions of the continuous-wave fields of a circular piston radiator in a rigid baffle are derived. These expansions are valid throughout the illuminated half-space and are useful for efficient numerical computation in the near-field region. Multipole coefficients are given by closed-form expressions which can be evaluated recursively.
Wittmann
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RC
National Institute of Standards and Technology, Boulder, Colorado 80303.
Yaghjian
A D
AD
D000162:Acoustics; D000465:Algorithms; D004574:Electromagnetic Fields; D006801:Humans