On Feb 13, 9:31*pm, Cecil Moore wrote:
Yuri Blanarovich wrote:
Kraus so effectively explains it in the introduction to his book, but the
"expertise" on this news group insists on otherwise - "no power in standing
wave circuit".

The energy in the traveling waves was supplied as power
by the source during the power-on transient state and is
exactly the amount of energy needed to support the forward
and reflected waves. The energy in the forward and reflected
waves is dissipated during the power-down transient state.

Assuming an integer number of cycles per second, a one second
long lossless transmission line with a forward power of 200
watts and a reflected power of 100 watts contains 300 joules
of energy.
--
73, Cecil *http://www.w5dxp.com

This is demonstrated everytime a pulsed radar fires. Energy for the
next pulse is stored in a Pulse Forming Network that is either a
transmission line or lumped circuit representation of a transmission
line. High energy devices such as radar, lasers and xray equipment
often use the lumped circuit (LC ladder)representation of a
transmission line to store energy. I dont know if there is a practical
example of an actual transmission line being used for this purpose
outside of a design laboratory due to physical impracticality but
under those lab conditions it was discovered that an actual
transmission line provide a pulse of superior shape than the lumped
circuit PFN. It should be noted that when a radar fires more power is
taken from the PFN in say 1uS than was placed into it during any uS
while the PFN was charging. MIT/ Lincoln Labs is probably the best
source of data for anyone who wants to research this further. The use
of a transmission line to store energy is covered in just about any
introductory level radar theory book.

For quite some time now I have followed this thread(s) wondering if
all the arguement is about whether or not a transmission line can
store energy or not. If this is in fact the question then the answer
is definitely YES.

Jimmie