On Jan 2, 3:44*pm, Cecil Moore wrote:
Keith Dysart wrote:
In a stub driven with a step function, where is the
energy stored?

Consider the state of the open circuited line
after settling.

Depends upon which valid model one is using.

1. Reflection Model - the energy is stored in the
forward and reflected traveling waves.

So it is stored only in the E field. Is it an
EM wave when only an E field is present?

2. The LCLCLC transmission line model - the energy
is alternately stored in the L's and C's.

Since there is no current, it is stored only in
the capacitance of the line.

3. The Sloshing Model - I'll let Roy handle that one.

The sloshing has stopped, so the answer is the same
as 2.

But the important question is: Do you consider it
to be an EM wave when only an E field is present?

...Keith