The UCLA bi-polar planar near-field scanner. II. Near-field to far-field transformation and holographic imaging capabilities

For pt.I see ibid., p.1526-1529 (1992). The authors examine the data processing capabilities which have been developed for the bipolar near-field scanner. Near-field to far-field transformation algorithms include the optimal sampling interpolation (OSI)/FFT, the Jacobi-Bessel transform, and the Fourier-Bessel transform. A comparative study of some of these techniques has recently been reported but was confined to the plane-polar configuration. Holographic imaging capabilities for determination of antenna aperture fields have also been developed to facilitate antenna diagnostics. A summary of the bipolar near-field data processing capabilities is presented. Results for a simulated array of infinitesimal dipoles and a measured waveguide-fed slot array are presented.<>