Spherical Near-Field - Far-Field Transformation for Quasi-Planar Antennas from Irregularly Spaced Data

A Nonredundant Near-Field to Far-Field Transformation with Spherical Spiral Scanning for Nonspherical Antennas

A fast and accurate near-field – far-field transformation technique with spherical spiral scanning tailored for nonspherical antennas, i.e., radiating systems with two dimensions very different from the third one, is developed in this paper. To this end, an antenna with one or two predominant dimensions (e.g., base station antennas and reflectarrays) is no longer considered as enclosed in a sph...

An Alternative Spherical near Field to Far Field Transformation

Correction of Known Position Errors in a Spherical Near to Far-Field Transformation for Long Antennas

RESEARCH ARTICLE Correction of Known Position Errors in a Spherical Near to Far-Field Transformation for Long Antennas Renato Cicchetti, Francesco D’Agostino, Flaminio Ferrara, Claudio Gennarelli, Rocco Guerriero and Massimo Migliozzi Department of Information Engineering, Electronics and Telecommunications, University of Rome “La Sapienza”, Rome, Italy Department of Industrial Engineering, Uni...

Near-field — Far-field Transformation Technique with Helicoidal Scanning for Elongated Antennas

A fast and accurate near-field — far-field transformation technique with helicoidal scanning is proposed in this paper. It is tailored for elongated antennas, since a prolate ellipsoid instead of a sphere is considered as surface enclosing the antenna under test. Such an ellipsoidal modelling allows one to consider measurement cylinders with a diameter smaller than the antenna height, thus redu...

Differences between Modal Expansion and Intergral Equation Methods for Planar Near-field to Far-field Transformation