Spherical near-field to far-field transformation by phase retrieval method

An Alternative Spherical near Field to Far Field Transformation

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...

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...

Polarization-Current-Based FDTD Near-to-Far-Field Transformation

A new near-to-far-field transformation algorithm for three-dimensional finite-different time-domain is presented in this article. This new approach is based directly on the polarization current of the scatterer, not the scattered near fields. It therefore eliminates the numerical errors originating from the spatial offset of the E and H fields, inherent in the standard near-to-far-field transfo...

On the Near-Field Sampling and Truncation Errors in Planar Time-Domain Near-Field to Far-Field Transformation

This paper studies the effect of three important parameters in planar time-domain (TD) near-field (NF) to far-field (FF) transformation. These parameters are the NF spatial sampling, NF measurement distance and scan surface truncation. The effect of these parameters over the TD FF accuracy are difficult to predict for Ultra Wide Band antennas. In this paper we aim to choose the optimum NF measu...