Flux of the Poynting vector

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I have some problems in calculating the flux of Poynting's vector through a surface.
I have that:

S=c/4π⋅H^2⋅n (S: Poynting's vector, n: versor of the direction of the propagation of the em wave)

H=1/cR A'
but: A=(1/cR) d'; A'=(1/cR) d'' ==> H= (1/cR)^2 d''
==> S= (c/4π)⋅ 1/(cR)^4 d''^2 n


I have to find that the result of the flux of S (I don't know through wich surface) is:

dE/dt=∫S⋅dΩ=...=-2/(3⋅c^3) |d''|^2 (d is magnetic dipole momentum)

How is it calculated?
Thanks to everyone who will try to help me.
 

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Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
 
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