Modal technique for the time domain analysis of crosstalk between coaxial cables

A study of current dominant coupling in a system comprising a large number of mutually coupled braided coaxial transmission lines is presented. An efficient model for the crosstalk is developed in the frequency domain using distributed circuit parameters and the concept of transfer impedance. The lines are assumed to be lossy and to have frequency-dependent per-unit-length parameters, and further losses due to the braided nature of the outer conductors are account for in the analysis. The validity of the coupling model is tested against measurements in the frequency domain before using fast Fourier transforms to evaluate the time domain responses