The Open Electrical & Electronic Engineering Journal

2010, 4 : 10-15
Published online 2010 January 22. DOI: 10.2174/1874129001004010010
Publisher ID: TOEEJ-4-10

Experimental Results Validating the Near-Field to Far-Field Transformation Technique with Helicoidal Scan

F. D´Agostino , F. Ferrara , C. Gennarelli , R. Guerriero and M. Migliozzi
D.I.I.I.E - University of Salerno, via Ponte Don Melillo, 84084 Fisciano (Salerno), Italy.

ABSTRACT

This paper concerns the experimental validation of the near-field – far-field transformation technique with helicoidal scanning. Such a technique, based on the theoretical results concerning the nonredundant sampling representations of the electromagnetic fields, makes use of a two-dimensional optimal sampling interpolation formula to reconstruct the near-field data needed to perform the classical near-field – far-field transformation with cylindrical scan. The comparison of the far-field patterns reconstructed from the acquired helicoidal measurements with those obtained from the data directly measured on the classical cylindrical grid assesses the effectiveness of the near-field – far-field transformation using this innovative scanning technique. Its validity is further confirmed by the very good agreement with the direct farfield measurements.

Keywords:

Helicoidal scanning, NF-FF transformation techniques, Nonredundant sampling representations.