2016 Technical Papers

Sphiral Near-Field Scanning for Automotive Antenna Measurements

Authors: Jeffrey A. Fordham, Francesco D’Agostino
Publication: EuCAP 2016
Copyright Owner: IEEE

Spherical spiral (Sphiral) scanning involves coordinating the motion of two simultaneous axes to accomplish near-field antenna measurements along a line on a sphere that does not cross itself. The line would ideally start near a pole and trace a path along the sphere to the other pole. An RF probe is moved along this path in order to collect RF measurements at predefined locations. The data collected from these measurements is used along with a near-field to far-field transformation algorithm to determine the radiated far-field antenna pattern.

The method for transforming data collected along a sphiral scan has been previous presented. Later laboratory measurement studies have shown the validity of the technique.

A review of the sphiral scanning technique and its recent advances, resulting from about ten years of research collaboration between the UNISA Antenna Characterization Research Group and MI Technologies is here presented. Such a scan technique relies on the non-redundant sampling representations of EM fields and takes full advantage of moving two axes simultaneously. Accordingly, it allows one to drastically reduce the overall number of required data and the time to collect the data. This scanning technique can be properly applied in testing antennas mounted on automobiles in order to reduce the overall time of the measurement.

You have requested a Reprint of an IEEE Paper

Copyright 2016 IEEE. Reprinted from EuCAP 2016 Conference.

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of NSI-MI Technologies' products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.

By choosing to view this document, you agree to all provisions of the copyright laws protecting it


1125 Satellite Blvd. NW,
Ste. 100
Suwanee, GA 30024 USA

+1 678 475 8300
+1 678 542 2601

Los Angeles

19730 Magellan Dr.
Torrance, CA 90502 USA

+1 310 525 7000
+1 310 525 7100


Stubley Lane,
Dronfield, S18 1DJ UK

+44 1246 581500


Seattle, WA Finding your local time... 16 Days 2023.amta.org
This site is using cookies for analytical purposes and to provide a better user experience. Read our Privacy Policy for more information.