Time domain near-field to near-field transformation using a spherical-multipole approach

An Alternative Spherical near Field to Far Field Transformation

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...

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...

Near - Field to Nearmar - Field Transformation for Arbitrary Near - Field Geometry , Utilizing

A novel summation variation on the usual computation bymultiple reflections of the transient rqsponse for a realistically modeledpulse generator loaded with different kinds of loads is described. Thisconstitutes an alternative method for evaluation of the inverse Laplacetransform applicable for general lumped loads. As examples, we employthis approach to calculate the transi...

A time domain spherical near-field measurement facility for UWB antennas employing a hardware gating technique

A spherical near-field antenna measurement facility employing a time domain hardware gating technique is presented. On-off keyed sinusoidal impulses are used as stimuli requiring wideband antennas with a bandwidth in excess of 400 MHz. The received signal is evaluated in the time interval after reaching the steady state and before multipath components arising in the non-ideal anechoic chamber d...