The radial component of the radiated power density of an antenna is ⃗⃗⃗⃗⃗⃗⃗⃗⃗⃗ = ⃗⃗⃗⃗ = 0 2 ⃗⃗⃗⃗ ( / 2) where 0 is the peak value of the power density, is the usual spherical coordinate, and ⃗⃗⃗⃗ is the radial unit vector. a) Determine the radiation intensity. b) Determine the directivity as a function of the directional angles and .

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