On Wed, Aug 21, 2019 at 03:21 PM, Ron Spencer wrote:
Return loss tells you how much of the input signal is reflected. Return loss
is the ratio between the reflected power and input power:
Hi Ron,
Be careful here about mixing power definition into return loss calculations. Strictly speaking the Gamma value or reflection coefficient is defined as a ratio of (V_reflected/V_incident). Again, the magnitude of the value of Gamma provides the value of RHO that I posted earlier. In a matched system you could certainly bring power into the definition but what about systems where impedance are mixed? I think you will avoid problems if you stick to VOLTAGE throughout your discussions of return loss and S11. Note, S11 is just GAMMA and as such like GAMMA is characterized with a magnitude value and a phase value. And the magnitude of S11 is just RHO. Gee, I hope I have no typos again... Alan
