NEAR-FIELD ELECTRIC FIELD STRENGTH LEVELS OF EM ENVIRONMENTS APPLICABLE TO AUTOMOTIVE SYSTEMS

As the number of electronic systems used on vehicles increases, the need to know the electromagnetic environment in and around these vehicles increases. This knowledge becomes basic information needed by system designers to avoid electronic system failures. Results of electric field strength measurements are reported for the near-field inside and outside of a passenger vehicle and of a tractor-trailer vehicle. These measurements were made with all common combinations of mobile transmitters and antennas. The rf transmitting sources used the maximum legal output power (110 W) at 40, 162, and 416 MHz, and nominal 100 watt power levels in the HF band (3 to 30 MHz). Illegal power levels (about 100 watts) of CB transmissions at 27 MHz were used through a special authorization by the Interagency Radio Advisory Committee (IRAC).

• Supplemental Notes:
  • Sponsored in part by National Highway Traffic Safety Administration, Washington, D.C. Pub. in Proceedings of IEEE International Symposium on Electromagnetic Compatibility, Seattle, Wash. 2-4 Aug 77, 77CH 1231-0 EMC pp336-343 1977.
• Corporate Authors:

  National Bureau of Standards

  14th Between E Street and Constitution Avenue, NW
  Washington, DC  United States  20234

  National Highway Traffic Safety Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Adams, J W
  • Kanda, M
  • Shafer, J
  • Wu, Yujia
• Publication Date: 1977

Media Info

• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Antennas; Automobiles; Electric fields; Electromagnetic compatibility; Electromagnetism; Electronic equipment; Electronics; Field strength; Ground vehicles; High frequency; Measurement; Passenger vehicles; Radio transmitters; Tractor trailer combinations; Truck tractors; Ultrahigh frequency; Vehicle design
• Old TRIS Terms: Medium frequencies; Ultrahigh frequencies
• Subject Areas: Design; Highways; Motor Carriers; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00174723
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Final Rpt.
• Files: TRIS, USDOT
• Created Date: Apr 12 1978 12:00AM