Accession Number:

ADA053548

Title:

Applications of Multiconductor Transmission Line Theory to the Prediction of Cable Coupling Volume IV. Prediction of Crosstalk in Ribbon Cables.

Descriptive Note:

Final technical rept.,

Corporate Author:

GEORGIA INST OF TECH ATLANTA

Personal Author(s):

Report Date:

1978-02-01

Pagination or Media Count:

63.0

Abstract:

The prediction of crosstalk in ribbon cables is investigated. Experimental results are obtained for a 20 wire ribbon cable and compared to the predictions of the multiconductor transmission line MTL model. Based on the experimental configuration tested, it would appear that accurate predictions of crosstalk can be achieved in controlled characteristic cables such as these. The prediction accuracies are typically within or - 1 dB for frequencies such that the line is electrically short L 110 lambda and or - 6 dB for frequencies such that the line is electrically long L 110 lambda. It was found that the parasitic wires in the cable can have a significant effect as much as 40 dB for all frequencies on the coupling between a generator circuit and a receptor circuit in the cable. Therefore to achieve accurate predictions in ribbon cables, one must consider the interactions between all wires in the cable. The wire insulation evidently can be ignored when the line is electrically short but cannot be ignored for higher frequencies. Conversely, the impedance of the reference wire cannot be ignored for low frequencies where the common impedance coupling dominates the electromagnetic field coupling. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE