Jim Kelley wrote:
"That`s because power doesn`t propagate, I hasten to add - neither do
Poynting vectors.:

Some world-class experts disagree with Jim. Here is a sample quotation
using the words "power flow".

From E.M. Purcell writing about "Antenna Gain and Receiving Cross
Section" on page 19 of "Radar System Engineering" edited by Louis M.
Ridenour:
"If the transmitting antenna were to radiate energy isotropically-that
is, uniformly in all directions-the power flow through unit area at a
distance R, from the antenna could be found by dividing P, the total
radiated power, by 4piRsquared."

Best regards, Richard Harrison, KB5WZI