The answer is P/4π[tex]r^{2}[/tex] or 1/r2
Radiated power density = S
Radiator = r
S = K/r2
Area of the sphere surrounding the antenna [tex]A_{sph}[/tex] = 4π[tex]r^{2}[/tex]
The total power radiated through a sphere of radius r is
P = [tex]S[/tex][tex]A_{sph}[/tex] = (K/r2)4π[tex]r^{2}[/tex]
= 4πK≈r°
Therefore,
The total power radiated remains constant with radius
S = P/[tex]A_{sph}[/tex]
= P/4π[tex]r^{2}[/tex] or 1/r2
To learn more about power density, refer
https://brainly.com/question/13035557
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