Exploration of the Feasibility of Adaptive Spherical Near-Field Antenna Measurements - Part II

Authors: Vincent Beaulé, Derek McNamara, Daniël Janse van Rensburg, Leili Shafai
Publication: AMTA 2013
Copyright Owner: NSI-MI Technologies

The use of pre-conditioning interpolation schemes, as a possible means of enhancing the performance of previously introduced adaptive acquisition algorithms for spherical near-field (SNF) test time reduction, is evaluated. Investigations have been carried out to establish whether the adaptive SNF approach is suited to test engineering practice are reported. The pre-conditioning method involving the acquisition of two orthogonal polar cuts on the near-field sphere and the separate linear interpolation of two complex spherical components of the NF data is shown to be the preferred scheme. This method is evaluated for three different antennas using specific acquisition rules, and decision functions related to directivity, amplitude error, and side lobe level.

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