W5DXP wrote in message ...

[s11]=rho, rho being just the magnitude of the s11.

I just told you that is not always true.

s11 is the reflection coefficient when a2=0

|rho| is the reflection coefficient when a2=a2

In a Z0-matched system with reflections, they are NOT equal.


You're right, but we are talking about a one-port network, the
antenna and transmission line.


Slick