Formula
Current (I) = I _mSin(β(L - |z|) )
Electric Wave (E_θ) = ( 60 × I_m / r ) × [ ( Cos (β L Cos&theta) - Cos(βL) ) / Sinθ ]
Magnetic Wave (H_Φ) = ( I_m / 2 πr ) ×[ ( Cos (βL Cos &theta) - Cos(βL) ) / Sin θ ]
Average radiated power density (P_d) = (15× I_m² / πr² ) × [ ( Cos (βL Cos&theta) - Cos(βL) ) / Sinθ ] ²

Where,    
β = 2π / λ    
λ = Wave Length    
I_m = Magnetic Current    
L = Half Antenna Length    
r = radius    
θ = Angle
This tool will help you dynamically to calculate dipole antennas

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