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

Words are not objects. They merely represent objects. We use
abstractions for brevity and clarity. Even the best say: "--the Poynting
vector or power density (watts per square meter)." See Kraus` 3rd
edition of "Antennas" page 73, under "Power Patterns".

Best regards, Richard Harrison, KB5WZI