Cecil Moore wrote:
wrote:
I somewhat sympathize with your dilemma. You have latched on to
these forward and backwards waves for so long that you have started
to believe that they are real and are therefore ascribing to
them all the properties one would expect of a real EM wave such
as current and power.
So what causes standing waves if there are no forward and backwards
waves?
When you solve the differential equations describing the circuit
with distributed capacitance, inductance, resistance and conductance,
given the excitation and boundary conditions, you discover that
the voltage and current distributions along the line form a
standing wave. No need for reflections at all.
It is a whole lot more convenient using the reflection model
though.
Just for a brief moment attempt to relax your hold on forward and
reverse waves and think of the real voltages and currents on the
line.
I will just as soon as you demonstrate how to generate standing
waves without the existence of a forward wave and reverse wave.
OK. Go for it.
....Keith