Analysis of the parameters of a lossy coaxial cable for cable fault location

Abstract

This paper presents an estimation of the per-unit-length parameters of a lossy cable. A RLGC lumped element model for the lossy transmission line parameters of a coaxial cable including frequency dependent filtering effect is used in this study to evaluate reflectometry responses of the cable systems. The simulated results of this model are compared with the measured results of a coaxial cable using impedance spectroscopy to show the accuracy in frequency domain. This lossy transmission line model then is solved in the time domain to accurately locate the faults. The simulated results are compared with the measured results using time domain reflectometry. Finally this model is used to simulate branched cable networks.