Complex Z0
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Maybe it has already been noticed,
but anyway,
it seems that,
given a uniform transmission line with
complex characteristic impedance,
the magnitude of the reflection coefficient
for any passive terminal load
is lower or equal than
-
Sqrt([1+Cos(t0)]/[1-Cos(t0)]),
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where t0 is the argument of Z0.
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Sincerely,
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pez,SV7BAX
&
yin,SV7DMC