network cable – stretched antenna

A high speed network cable is a antenna. To me, a network cable is in essence a wave-guide, or antenna. The network cable allows a path from the one network card to the other network card. These strands of wire don’t just allow electrical signals, they allow radio waves to transverse, reflect, and be absorbed. Each wire pair needs to be considered as a wave-guide and treated as such. Minor kinks or length changes cause serious issues with signal degradation. These guys at Quabbin have a pretty good explanation. I will try to post some practical examples using damaged wire pairs, and graphs (from analyzers/cable testers.)

https://www.quabbin.com/tech-briefs/what-return-loss-why-it-important

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