How does TAP™ compute free space loss for microwave link reliability predictions?

Several types of calculations are used to make microwave link reliability predictions. One of these is the microwave path free space loss. The free space loss is computed based on the path length and frequency using the equation:

A = 96.6 + 20 LOG(F) + 20 LOG(D)


  • A is the attenuation in dB.
  • F is the frequency in GHz.
  • D is the distance in miles.