This section is devoted to show some experimental results assessing the effectiveness of the described NF-FF transformation with spherical spiral scanning for quasi-planar antennas.
Note that the number of employed samples is 4 408, significantly less than those (6 392 and 7 320) required by the NF-FF transformation [23, 24] based on the spherical AUT modelling and by the MI software package implementing the classical NF-FF transformation with spherical scanning , respectively.
From the computational viewpoint, an additional time is required by the OSI algorithm to reconstruct the NF data needed to perform the classical NF-FF transformation from the nonredundant ones acquired along the spiral.
An experimental validation of the NF-FF transformation technique with spherical spiral scanning suitable for quasi-planar antennas and using a two-bowls modelling of the AUT has been provided in this paper.
Gennarelli, "Application of nonredundant sampling representations of electromagnetic fields to NF-FF transformation techniques," Int.
Savarese, "Data reduction in the NF-FF transformation with bi-polar scanning," Microw.
Savarese, "Data reduction in the NF-FF transformation technique with spherical scanning," Journal of Electromagnetic Waves and Applications, Vol.
Migliozzi, "Effective antenna modellings for NF-FF transformations with spherical scanning using the minimum number of data," Int.
Migliozzi, "An effective NF-FF transformation technique with planar spiral scanning tailored for quasi-planar antennas," IEEE Trans.
At last, the developed interpolation algorithm has been applied to retrieve the NF data required to carry out the spherical NF-FF transformation , as modified in [12,13].
Moreover, the number of samples collected along the spiral is much less than that (130 562) required by the NF-FF transformation with spherical scanning .
Migliozzi, "Effective antenna modelings for NF-FF transformations with spherical scanning using the minimum number of data," International Journal of Antennas and Propagation, No.