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Rapid Spherical Near-Field Antenna Measurements for Vehicle Applications
Technical Paper
2005-01-0569
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
As more wireless services such as satellite radio (SDARS), navigation systems, OnStar, and mobile telephones are installed on GM vehicles, there is a need to make quick and accurate vehicle antenna pattern measurements. The interaction between vehicle and antenna must be included to ensure accurate vehicle antenna measurements. This implies that the size of the effective antenna should include both the antenna and vehicle interaction dimensions. For the frequency range of 500 MHz to 6 GHz, one solution is to use a spherical near-field system. The Satimo rapid probe array technology was selected to develop a vehicle antenna test system (ATS), which minimizes test time and maintains data accuracy. The ATS was designed to operate inside of an existing GM electromagnetic compatibility (EMC) anechoic chamber equipped with a nine-meter turntable. It includes a fully autonomous transport and deployment system allowing the ATS hardware to be removed and the chamber returned to its EMC configuration. This paper presents the ATS design, summary of the verification test results, and a modal analysis showing vehicle to antenna interaction.
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Authors
Citation
Graham, J. and Iversen, P., "Rapid Spherical Near-Field Antenna Measurements for Vehicle Applications," SAE Technical Paper 2005-01-0569, 2005, https://doi.org/10.4271/2005-01-0569.Also In
Automotive Electronics on CD-ROM from the SAE 2005 World Congress
Number: SP-1980CD; Published: 2005-04-11
Number: SP-1980CD; Published: 2005-04-11
SAE 2005 Transactions Journal of Passenger Cars: Electronic and Electrical Systems
Number: V114-7; Published: 2006-02-01
Number: V114-7; Published: 2006-02-01
References
- Howland A.R. et al “Novel Spherical Near-Field Antenna Measurement Techniques Advance State-of-the -Art” AMTA October 2001
- Iversen P.O. Garreau Ph. et al “Real Time Spherical Near-field Antenna Test Range for Personal Communications Applications” AMTA October 1999
- Joy E. “Near-Field Range Qualification Methodology,” IEEE Transactions on Antennas and Propagation 36 6 June 1988
- Francis M. Wittmann R. “NIST Spherical Near-Field Class for GM” September 2003
- Newell A. “Error Analysis Techniques for Planar Near-Field Measurements,” IEEE Transactions on Antennas and Propagation 36 6 June 1988