Spherical Near-field Probe Fed Antenna Techniques for Accurate Millimeter Wave Measurements

Authors: F. Ferrero, S.F. Gregson, J. Lanteri, L. Brochier, Y. Benoit, C. Migliaccio, J-Y. Dauvignac

This paper present a specific set-up developed for antenna pattern measurements of probe-fed antenna with a 500mm AUT-probe distance. An example of Near-Field measurement is proposed and shows important errors on phase acquisition at 90GHz. Raw measurements are improved using a spherical correction based on laser-tracker structural data. Phase error and Near-field to Far Field transformation are strongly improved with this technique.

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