FIELD STRENGTHS AND INDUCED CURRENTS IN VEHICLE WIRING LOOMS DUE TO VEHICLE MOUNTED RADIO TRANSMITTERS.
The work described in the first part of the report quantifies the electromagnetic threat to vehicle electronic systems due to on-board transmitters. Separate measurements were made of the field strengths produced in and around a motor vehicle by five radio transmitters operating at different frequencies in the range of 27 MHz - 905 MHz, covering UHF (amateur 10m) to UHF cellular radio. The measurement procedure is described and the results tabulated and discussed. The second part of the report describes how current injection techniques, were used to formulate test criteria for assessing the ability of car electrical components to withstand the vehicle electromagnetic environment. Seven radio transmitters were used covering a frequency range 21 MHz - 905 MHz. In the tests, induced currents were measured in selected wiring looms and the results are again tabulated and discussed. Conclusions are drawn and useful suggestions made for improved system immunity. Earlier complimentary work is documented in Report 87-0177R, 'Field Strengths Due to Vehicle mounted Transmitters', and Report 86-0001R, 'RF Currents Induced in Motor Vehicle Wiring Looms due to External RF Fields'.
ERA Technology LimitedCleeve Road
Leatherhead, Surrey KT22 7SA, England
- Ferrier, I L
- Maddocks, A J
- Publication Date: 1990-5
- Pagination: 29 p.
- TRT Terms: Communication systems; Electromagnetic interference; Electromagnetism; Electronic equipment; Field strength; Onboard navigational aids; Radio; Radio transmitters; Transmission; Wiring
- Uncontrolled Terms: Injection
- Old TRIS Terms: Currents; Electronic systems; On board; Radio transmission
- Subject Areas: Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;
- Accession Number: 00617971
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: ERATL-89-0572R
- Files: TRIS
- Created Date: Dec 31 1991 12:00AM