Abstract:
A simple, straightforward derivation of three necessary conditions that define the region of validity for the near-field directivity function (beam pattern) of an apertur...Show MoreMetadata
Abstract:
A simple, straightforward derivation of three necessary conditions that define the region of validity for the near-field directivity function (beam pattern) of an aperture (array) is presented. The derivation of all three criteria is based on determining what conditions must be satisfied in order to obtain a valid Fresnel approximation of the time-independent free-space Green's function. Comparisons with other near-field conditions in the literature are made.<>
Published in: IEEE Journal of Oceanic Engineering ( Volume: 18, Issue: 1, January 1993)
DOI: 10.1109/48.211494