TY - JOUR A1 - Lenz, Philipp A1 - Baron, Philipp A1 - Wittmann, Armin A1 - Fischer, Georg T1 - Wear-induced attenuation on transmission lines and their causes T2 - Transactions on Electrical and Electronic Materials N2 - In this paper, the radio frequency (RF) behavior of mechanically stressed coaxial and for the first time also twisted-pair transmission lines is investigated over their service life. The main goal is to enable predictive maintenance for cables in moving applications and avoid preventive replacement. This also reduces the use of high-cost resources. For this purpose, stranded and solid-core variants of coaxial and twisted-pair type cables are mechanically loaded on the two-pulley apparatus according to EN 50396. Their RF transmission (S21) behavior is measured using a vector network analyzer and presented over bending cycles. For the first time, the phase response of mechanically loaded transmission lines is evaluated with respect to their service life. Two significant causes for the increasing attenuation and altered phase response are identified: breakage in foil screen and increasing surface roughness on the copper conductors. The identified causes are supported with literature evidence. Through measurements and theoretical calculations, it is proven that the phase is much more suitable for an assessment of the remaining service life than the amplitude. The findings can be used to implement a cable monitoring system in industrial environments which monitors the lines in-situ and reminds the user to replace them, whenever a certain wear-level is reached. KW - RF attenuation KW - coaxial KW - twisted-pair KW - transmission phase KW - surface roughness KW - wear-level monitoring KW - Elektrisches Kabel KW - Koaxialkabel KW - Verdrillung KW - Hochfrequenz KW - Rauigkeit KW - Verschleißprüfung Y1 - 2023 UR - https://hst.opus.hbz-nrw.de/frontdoor/index/index/docId/244 UR - https://nbn-resolving.org/urn:nbn:de:hbz:tr5-2448 VL - 24 IS - 1 SP - 102 EP - 114 PB - Springer Nature ER -