Why Does Tighter Twisting in Twisted Pair Cable Increase Transmission Rate?

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Discussion Overview

The discussion centers on the relationship between the twisting of wires in twisted pair cables and the resulting transmission rates. Participants explore the underlying mechanisms and implications of tighter twisting on signal integrity and performance.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions why tighter twisting in twisted pair cables leads to higher transmission rates.
  • Another participant suggests that tighter twists improve coupling between wires, reduce electromagnetic (EM) radiation losses, and allow higher frequencies to be transmitted over longer distances.
  • A third participant provides a link to a Wikipedia article on twisted pair cables, implying it may contain relevant information.
  • A later reply acknowledges the importance of common mode rejection in the context of twisted pair cables.

Areas of Agreement / Disagreement

Participants present differing aspects of the topic, with some focusing on coupling and EM radiation, while others highlight common mode rejection. No consensus is reached on the primary reasons for increased transmission rates.

Contextual Notes

Some assumptions about electromagnetic behavior and the definitions of terms like "common mode rejection" may not be fully explored or agreed upon.

faraz_niz
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Why is that in twisted pair cable, the tighter the twisting, the higher the supported transmission rate?


Thankyou
 
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The tighter the twist, the better the coupling between the two wires, the less the EM escape out along the surface so less energy is lost from radiation along the way so higher frequencies can be carry for longer distance.
 
I totally forgot the common mode rejection part! Sorry.
 

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