Cecil and others, even authors of books, have said -

- - - - |rho|^2 cannot be greater than 1.0 - - - -

====================================

Would you change your minds if I describe a
reflection-coefficient bridge, which anybody can
construct, which accurately measures values of | rho |
up to its greatest possible value in transmission lines
of 2.414 There's no catch!

For some reason Dr Slick has remained silent to my
acceptance of his challenge to find such an instrument.
Perhaps he's gone away to think about it.
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Reg, G4FGQ