On Jun 4, 7:19*pm, Keith Dysart wrote:
If, for all time,
the current or voltage is 0, then so is the energy flow.

You left out the word "net" again. Indeed, there is zero *net* energy
flow in a pure standing wave. It is technically not a wave because it
doesn't transfer energy and momentum. The forward and reflected
Poynting vectors can be of any magnitude. They are just equal in
magnitude whatever that magnitude might be.

Keith, could you refresh my memory on those instantaneous power
equations that you once published. Given a forward wave and a
reflected wave, what was your equation for instantaneous power? None
of my references consider EM standing wave instantaneous power to be
important enough to present a mathematical treatment of the subject.
--
73, Cecil, w5dxp.com