Keith Dysart wrote:
I am not sure you have the methodology quite correct.
The source is not turned off; its output is set to 0.

That's exactly the same thing - turning a source off
and setting it to zero. I suggest you go back and
study the rules for superposition and get back to us.
Exactly the same concepts apply for an s-parameter
analysis. Please learn how s11 and s22 are measured
and get back to us.
--
73, Cecil http://www.w5dxp.com