Gene Fuller wrote:
The Poynting vector, generally described as ExH, is the energy flow
density. It has units of energy/area/time.
Rate of energy flow through an area? Sure sounds like joules/sec
(power) to me. The IEEE Dictionary agrees.
In practical terms the Poynting vector ExH and the Poynting theorem have
little utility for radio amateurs.
I particularly like Johnson's treatment where the forward power
and reflected power have separate Poynting Vectors. :-)
A quote from Ramo & Whinnery's, _Fields_and_Waves_:
"... it is often convenient to think of the Poynting Vector as
the vector giving direction and magnitude of energy flow at any
point in space."
--
73, Cecil
http://www.qsl.net/w5dxp