Near end coupling coeffecient problems

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The discussion revolves around calculating the near end coupling coefficient (Kne) using the provided formula and parameters. The user has calculated the propagation delay (Td) based on the line capacitance and inductance, but the resulting coefficient of 1.64 seems incorrect, suggesting interference voltage exceeds the driving voltage. The parameters given include C as 10pF, L as 80nH, and Zo as 70.7, with a line length of 50mm. The user seeks assistance in identifying potential errors in their calculations or understanding of transmission line theory. Clarification of the problem's context and calculations is requested to resolve the discrepancy.
Trespaser5
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I have been given a formula Kne = \frac{1}{4Td}(CZo+\frac{L}{Zo})
I've been given C as 10pF and L as 80nH and Zo as 70.7.
I have calculated Td from the formula propogation velocity = 1/\sqrt{LC} and the line capacitance and inductance are 400nH and 80pF and then divided this into 0.05m the line length is given as 50mm.

The problem is I get a coeffcient of 1.64, this can't be correct as it would mean the interference voltage would be greater than the voltage being driven in the aggressor

Anyone see where I'm going wrong ?
 
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How about you state the problem in full. Some kind of transmission line thing?
 

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