Thank you. That is, of course, for a two port network. Since we've been
talking strictly about a one-port case (I think, anyway), let me
rephrase the question. Do you have any reputable source that defines the
reflection coefficient for a one-port network as anything other than Vr/Vf.

Although it's not really relevant to the discussion at hand, I believe a
valid argument could be made that if a2 isn't equal to zero, then S11
isn't a reflection coefficient at all. It surely isn't the reflection
coefficient at port 1, anyway. But it's a point I'll happily concede in
lieu of fussing about it.

Roy Lewallen, W7EL

W5DXP wrote:
Roy Lewallen wrote:

I've never seen the (voltage) reflection coefficient defined as
anything other than the ratio of reflected voltage to forward voltage.
Do you have any reputable source that defines it differently?


s11 is a reflection coefficient that has the special condition that
a2 must be equal zero. When a2 is not equal zero, the s11 reflection
coefficient and the apparent reflection coefficient are not the same.