Cecil Moore wrote:
Keith Dysart wrote:
Consider a quarter wave-length of open circuited line connected
to a 100 W source. After 1/2 cycle it is fully charged. At 4 MHz
it stores 0.125E-6 J of energy.

Only if the 100 W source is turned off after the first
1/2 cycle. If it is a constant power source and is not
turned off, the forward and reflected power in that stub
would increase without bounds except for I^2*R losses
and dielectric losses. Only when the power output of
the source equals the losses in the stub will steady-
state be reached and that could be when the forward
power is 1000 watts or more.

This is, of course, assuming that the constant power
source is seeing its designed-for impedance as it
would through a lossless matching network.
--
73, Cecil http://www.w5dxp.com