Dr. Slick wrote:
Therefore, the reflected voltage can never be greater than the
input voltage for a passive network, and the reflection coefficient
can never be greater than 1 for such a case.

What must be realized is that the s-parameter reflection coefficients
are *PHYSICAL* reflection coefficients while 'rho' is not a physical
reflection coefficient. s11 and 'rho' do not usually have the same
value. There are physical constraints on s11. The s11 physical
constraints do not apply to 'rho'. s11 is the square root of the
ratio of Pref to Pfwd under special conditions. 'rho' is the square
root of the ratio of Pref to Pfwd under all conditions. There's a
big difference. s11 does not usually equal 'rho' anywhere except
at a one-port load.
--
73, Cecil http://www.qsl.net/w5dxp



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