CROSSTALK IN BRAIDED SHIELD COAXIAL CABLES

The phenomenon of crosstalk between parallel braided shield coaxial cables is examined. Two specific configurations are treated in detail: (1) two infinite length cables and (2) two finite length cables with their shields terminated in perfectly conducting shorting planes. Crosstalk is calculated using a new integral equation formulation. A comparison is made between the existing transmission line model, traditionally used for analyzing such coupling, and this new approach. Measurements of far-end and near-end crosstalk were made and the correlation of this data with these two theories is discussed. It was found that, at frequencies such that the cable separation is an appreciable portion of a wavelength, the integral equation approach is much more accurate at predicting the crosstalk than transmission line theory