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'.


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    Title :

    Field Strengths and Induced Currents in Vehicle Wiring Looms Due to Vehicle Mounted Radio Transmitters


    Contributors:

    Publication date :

    1990


    Size :

    29 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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