wrote in message
oups.com...

How close Z11=((1+s11)*(1-s22)+s12*s21)/((1-s11)
*(1-s22)-s12*s21) will be to the stated large signal
impedances after you convert
it to a series equivalent impedance on the Smith
chart, I don't really know.

Note:

In the above formula Z11 should be replaced by
Z11 / Z0. In other words Z11 is "normalized" with respect to Z0 in this
formula. See the Gonzalez reference.

In a "normalized" Smith chart Z0=1.0.

Bill W0IYH