Applications of non-uniform sampling techniques and fast Fourier transform in plane near-field antenna measurements

In order to construct far-field patterns of antennas from the results of near-field antenna measurements, uniform sampling techniques and Jacobi-Bessel algorithm have been widely used in the past few years. The paper addresses the non-uniform sampling techniques and the FFT algorithm applicable to plane near-field measurements. The method is analyzed for locating the measured near-field data distributed arbitrarily on a uniform rectangular coordinate system, so as to perform the subsequent FFT algorithm. Two interpolation algorithms are utilised to provide this regularization