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Shielded cabling is 100 times less susceptible to interference than UTP

It is a common myth that screens and shields can behave as antennas because they are long lengths of metal. The fear is that shields can "attract" signals that are in the environment or radiate signals that appear on the twisted-pairs. The fact is that shields and the copper balanced twisted-pairs in a UTP cable will behave as an antenna to some degree. Models and experiments prove that UTP cables have 100 times more potential to radiate and receive signals (i.e. behave like an antenna) than F/UTP cables under ideal termination conditions and 10 times more potential than F/UTP cables inappropriately left ungrounded on both ends.

UTP VS. F/UTP Susceptibility (Data provided courtesy of NEXANS/Berk-Tek)

UTP VS. Ungrounded F/UTP Susceptibility (Data provided courtesy of NEXANS/Berk-Tek)

WHITE PAPER: Screened and Shielded Cabling: The Antenna Myth