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This work evaluates the variation of wire impedance and velocity of propagation in bundled wires. Unshielded wire bundling was found to cause changes greater than 60Ω with standard deviation between 30.4–33.4Ω on 150Ω wires. Velocity of propagation was found to vary from 0.589c to 0.602c with a standard deviation of 0.0031c. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2082–2084, 2016

Abstract-In recent years, methods used to locate and diagnose wiring faults have increased in complexity and variety. However, there is much research yet to take place in order to develop high resolution models for accurately analysis of the effects of small faults, gradual impedance discontinuities, and signal propagation over diverse frequency ranges. In solving these problems, advanced forward models for simulation of various wiring systems and their corresponding challenges have been developed and combined with inversion theory in order to correctly retrace impedance changes from reflectometry data. Particular attention is paid to the chafed shielded wire fault type, which has been of interest because of its prevalence and the challenges it presents.

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