Link Budget & Propagation
Friis Transmission Calculator
Calculate the power received over a free-space link from transmit power, antenna gains, wavelength and separation.
Result
Enter the inputs above and select Calculate.
Formula: P_r = P_t + G_t + G_r + 20 · log₁₀(λ / (4πR))
Valid in the far field of both antennas, with matched polarisation and no obstructions.