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

This paper concerns the experimental validation of the near-field - far-field transformation technique with heli- coidal 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 di- rectly measured on the classical cylindrical grid assesses the effectiveness of the near-field - far-field transformation us- ing this innovative scanning technique. Its validity is further confirmed by the very good agreement with the direct far- field measurements.

[1]  Ovidio Mario Bucci,et al.  Near-field-far-field transformation from nonredundant plane-polar data: effective modellings of the source , 1998 .

[2]  Claudio Gennarelli,et al.  Data reduction in the NF-FF transformation with bi-polar scanning , 2003 .

[3]  Ovidio Mario Bucci,et al.  Probe compensated far-field reconstruction by near-field planar spiral scanning , 2002 .

[4]  G. Riccio,et al.  Probe compensated NF-FF transformation with spherical spiral scanning , 2003, 17th International Conference on Applied Electromagnetics and Communications, 2003. ICECom 2003..

[6]  Arthur D. Yaghjw.  An Overview of Near-Field Antenna Measurements , 2009 .

[7]  L. Jofre,et al.  Rapid near-field antenna testing via arrays of modulated scattering probes , 1988 .

[8]  Ovidio Mario Bucci,et al.  Nonredundant Nf-Ff Transformation With Helicoidal Scanning , 2001 .

[9]  Flaminio Ferrara,et al.  Near-field – far-field transformation techniques , 2006 .

[10]  O. Bucci,et al.  Representation of electromagnetic fields over arbitrary surfaces by a finite and nonredundant number of samples , 1998 .

[11]  Marco Donald Migliore,et al.  Advanced field interpolation from plane-polar samples: experimental verification , 1998 .

[12]  Yahya Rahmat-Samii,et al.  Linear spiral sampling for the bipolar planar near-field antenna measurement technique , 1996 .

[13]  Ovidio Mario Bucci,et al.  Fast and accurate near-field-far-field transformation by sampling interpolation of plane-polar measurements , 1991 .

[14]  G. Franceschetti,et al.  On the spatial bandwidth of scattered fields , 1987 .

[15]  Ovidio Mario Bucci,et al.  NF-FF transformation with cylindrical scanning: an effective technique for elongated antennas , 1998 .

[16]  Claudio Gennarelli,et al.  Theoretical Foundations of Near-Field-Far-Field Transformations with Spiral Scannings , 2006 .

[17]  Francesco D'Agostino,et al.  NF-FF transformation with plane-polar scanning: ellipsoidal modelling of the antenna , 1999 .

[18]  Flaminio Ferrara,et al.  NF-FF transformation with cylindrical scanning from a minimum number of data , 2002 .

[19]  S. Costanzo,et al.  Far-Field Reconstruction from Phaseless Near-Field Data on a Cylindrical Helix , 2004 .

[20]  E. S. Gillespie.  Special issue near-field scanning techniques , 1988 .

[21]  G. Riccio,et al.  Near-field-far-field transformation with spherical spiral scanning , 2003, IEEE Antennas and Wireless Propagation Letters.

[22]  Ovidio Mario Bucci,et al.  Data Reduction in the Nf-Ff Transformation Technique With Spherical Scanning , 2001 .