Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-03T01:18:14.747Z Has data issue: false hasContentIssue false
  • English
  • Français

Experimental comparison of absorber and conductive floor automotive near field antenna measurement systems

Published online by Cambridge University Press:  20 October 2021

F. Saccardi Open the ORCID record for F. Saccardi [Opens in a new window] ,
F. Mioc ,
A. Scannavini ,
P. O. Iversen ,
J. Estrada ,
M. Edgerton ,
J. A. Graham  and
L. J. Foged
F. Saccardi*
Affiliation:
Microwave Vision Italy SRL, Via dei Castelli Romani 59, 00071, Pomezia, Italy
F. Mioc
Affiliation:
Microwave Vision Italy SRL, Via dei Castelli Romani 59, 00071, Pomezia, Italy
A. Scannavini
Affiliation:
Microwave Vision Italy SRL, Via dei Castelli Romani 59, 00071, Pomezia, Italy
P. O. Iversen
Affiliation:
Orbit/FR's Corporate HQ, 650 Louis Drive Suite 100, 18974 Warminster, PA, USA
J. Estrada
Affiliation:
MVG Inc., 450 Franklin Gateway Suite 100, 30067 Marietta, GA, USA
M. Edgerton
Affiliation:
GM Proving Ground, 3300 General Motors Rd, 48380, Milford, MI, USA
J. A. Graham
Affiliation:
GM Technical Fellow Antenna Development and Performance (Retired), Linden, Michigan (MI), USA
L. J. Foged
Affiliation:
Microwave Vision Italy SRL, Via dei Castelli Romani 59, 00071, Pomezia, Italy
*
Author for correspondence: F. Saccardi, E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Large truncated spherical near-field systems with conductive or absorbing floors are typically used in the measurement of the performances of vehicle-installed antennas. The main advantage of conductive floor systems is the ease of accommodation of the vehicle under test, but their performances are affected by the interaction with the reflecting ground floor. Instead, absorbing-based systems emulating free-space conditions minimize the effect of the interaction with the floor, but generally require longer setup times, especially at lower frequencies (70–400 MHz), where bulky absorbers are typically used to improve reflectivity levels. Considering scaled measurements of a vehicle model, the performances of these two typical implementations are analyzed in the 84–1500 MHz range and compared to free-space measurements. Absorbers with different dimensions and reflectivity have been installed in the scaled measurement setup, and measured data have been investigated with proper post-processing to verify the applicability to realistic systems. Figures of merit of interest for automotive applications, like gain and partial radiated powers, have been compared to free-space to evaluate the impact of different scenarios.

Keywords

Automotivespherical near fieldmulti-probeabsorbersperfect electric conductorground planetruncation
Type
EuCAP 2020
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Special Issue 6: EuCAP 2020 Special Issue , July 2022 , pp. 689 - 700
Check for updates
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Saccardi, F, Mioc, F, Giacomini, A, Scannavini, A, Foged, LJ, Estrada, J, Iversen, PO, Edgerton, M and Graham, JA (2020) Experimental comparison of vehicular antenna measurements performed over different floors. 2020 14th European Conference on Antennas and Propagation (EuCAP) (https://ieeexplore.ieee.org/document/9135819, 10.23919/EuCAP48036.2020.9135819).Google Scholar
Recommended Practice for Near-Field Antenna Measurements, IEEE Std 1720-2012.Google Scholar
Hansen, JE (ed.) (1988) Spherical Near-Field Antenna Measurements, Peter Peregrinus Ltd., on behalf of IEE, London, United Kingdom.CrossRefGoogle Scholar
Noren, P, Garreau, P and Foged, LJ (2012) State of the art spherical near-field antenna test systems for full vehicle testing, EuCAP, Prague, Czech Republic, March 2012.CrossRefGoogle Scholar
Asghar, ME, Wollenschläger, F, Bornkessel, C, Griesche, A and Hein, MA (2019) Comparative analysis of spherical near-field automotive antenna measurement facilities. 2019 13th European Conference on Antennas and Propagation (EuCAP).Google Scholar
Saccardi, F, Mioc, F, Giacomini, A and Foged, LJ (2018) Estimation of the Realistic ground effect in free-space automotive measurements. 40th AMTA Symposium, Williamsburg, Virginia, USA, Nov 2018.Google Scholar
Saccardi, F, Mioc, F, Foged, LJ, Iversen, PO and Estrada, J (2020) Estimation of real ground effect in absorber-based automotive measurements: experimental validation. APS 2020, 5–10 July 2020, Montréal, Canada.CrossRefGoogle Scholar
Scialacqua, L, Foged, LJ, Mioc, F and Saccardi, F (2017) Link between measurement and simulation applied to antenna scattering and placement problems. EuCAP, Paris, France, 19–24 March 2017.CrossRefGoogle Scholar
Saccardi, F, Mioc, F, Estrada, J, Iversen, PO, Foged, LJ, Edgerton, M and Graham, JA (2019) Comparative investigation of spatial filtering techniques for ground plane removal in PEC-based automotive measurements. AMTA, San Diego, CA, USA, 6–11 October 2019.CrossRefGoogle Scholar
Mauermayer, RAM and Eibert, TF (2016) Spherical field transformation for hemispherical antenna measurements above perfectly conducting ground planes. AMTA, Austin, TX, USA, October 2016.CrossRefGoogle Scholar
Saccardi, F, Rossi, F, Scialacqua, L and Foged, LJ (2017) Truncation error mitigation in free-space automotive partial spherical near field measurements. AMTA, Atlanta, GA, USA, 15–20 October 2017.CrossRefGoogle Scholar
https://www.mvg-world.com/en/products/absorbers/standard-absorbers/pyramidal-absorbers-aep-series (accessed July 2021).Google Scholar
https://www.mvg-world.com/en/products/antenna-measurement/software/mv-echo (accessed July 2021).Google Scholar
Standard Test Procedures for Antennas, ANSI/IEEE Std 149-1979.Google Scholar
Saccardi, F, Mioc, F, Giacomini, A, Scannavini, A, Foged, LF, Estrada, J, Iversen, PO, Edgerton, M and Graham, JA (2019) Accurate calibration of truncated spherical near field systems with different ground floors using the substitution technique, AMTA, San Diego, CA, USA, 6–11 October 2019.CrossRefGoogle Scholar
Foged, LJ, Saccardi, F, Mioc, F and Iversen, PO (2016) Spherical near field offset measurements using downsampled acquisition and advanced NF/FF transformation algorithm. EuCAP, Davos, Switzerland, 10–15 April 2016.CrossRefGoogle Scholar
Saccardi, F, Mioc, F, Iversen, PO, Estrada, J and Foged, LJ (2020) Experimental validation of the translated-SWE technique applied to automotive measurements over PEC-floor at arbitrary height. 2020 14th European Conference on Antennas and Propagation (EuCAP).CrossRefGoogle Scholar
Wollenschläger, F, Foged, LJ, Asghar, ME, Bornkessel, C and Hein, MA (2019) Spherical wave expansion applied to the measured radiation patterns of automotive antennas in the installed state in the GHz range. 2019 13th European Conference on Antennas and Propagation (EuCAP), pp. 1–5.Google Scholar
G Automotive Association (5GAA); DRAFT TR P-210024 Working Group Evaluation, test beds and pilots Vehicular Antenna Test Methodology.Google Scholar
Asghar, ME, Bornkessel, C and Hein, MA (2020) Experimental determination of the total radiated power of automotive antennas in the installed state.2020 14th European Conference on Antennas and Propagation (EuCAP), pp. 1–5.CrossRefGoogle Scholar
Pelland, P, van Rensburg, DJ, Berbeci, M, Storjohann, FO, Griesche, A and Busch, J-P (2020) Automotive OTA measurement techniques and challenges. 2020 Antenna Measurement Techniques Association Symposium (AMTA), pp. 1–6.Google Scholar