Jim Kelley wrote:


Cecil Moore wrote:
There existed energy in the two waves before they were canceled.

I really don't want to go on ad infinitum about this, but the only
"before" would have been "before" the conditions for wave cancellation
existed.

Wave cancellation is a continuous steady-state process.
Every instant of present time, reflected waves are in
the process of being canceled. The power density equation,

Ptot = P1 + P2 + 2*SQRT(P1*P2)cos(A)

is a continuous steady-state process.

The s-parameter equation, b1 = s11*a1 + s12*a2, is a
continuous steady-state process. If you square both
sides of the equation you get the power density equation
above. IT IS A CONTINUOUS STEADY-STATE PROCESS that
spans the past, present, and future until the power
down transient state begins.
--
73, Cecil http://www.w5dxp.com