Forumlae for delay in pair-wise twisted single conductors for frequencies>10MHz

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SUMMARY

This discussion focuses on calculating the delay of impulses in twisted single conductors at frequencies exceeding 10MHz, specifically for impulses with a period of 1μs and pulse duration of 20ns. Standard formulas are ineffective due to the high frequency, necessitating a deeper understanding of cable specifications such as propagation velocity, loss versus frequency, and dispersion. Participants emphasize the importance of cable characteristics, including insulator type, shape, and size, which significantly influence pulse delay and recognition.

PREREQUISITES
  • Understanding of twisted pair cable design
  • Knowledge of signal propagation velocity in conductors
  • Familiarity with dispersion effects in high-frequency signals
  • Experience with measuring and analyzing pulse characteristics
NEXT STEPS
  • Research formulas for calculating delay in twisted pair conductors at high frequencies
  • Investigate the impact of dispersion on signal integrity in twisted cables
  • Learn about the specifications of different cable types and their effects on signal delay
  • Explore measurement techniques for analyzing pulse delays in high-frequency applications
USEFUL FOR

Electrical engineers, telecommunications professionals, and anyone involved in high-frequency signal transmission and analysis will benefit from this discussion.

freddyfish
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I would like to know if anyone knows any good formulas for calculating the delay of impulses in single conductors twisted around each other when the period of the impulses is 1μs and the pulses are 20ns long.

Some of the usual relations are no longer applicable in this case due to the very high frequency, so I am fishing for some tips and some warnings about all the pits you can fall into facing a problem like this.

Thanks
 
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freddyfish said:
I would like to know if anyone knows any good formulas for calculating the delay of impulses in single conductors twisted around each other when the period of the impulses is 1μs and the pulses are 20ns long.

Some of the usual relations are no longer applicable in this case due to the very high frequency, so I am fishing for some tips and some warnings about all the pits you can fall into facing a problem like this.

Thanks

The main things to look in the cable specs are are the propagation velocity, the loss versus frequency, and the dispersion. What specific cables are you looking at?
 
What distance!

And what insulator, shape, size...

Depending on that, you can receive a delayed pulse, or more often, a thing hard to recognize, because of dispersion.
 

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