dBm to Power density
Frequency: MHz
Antenna gain: dBi
dBm value: dBm
dBm/m2 value: dBm/m2
Fieldstrength: dBuV/m (no input!)

- Measure the (low) power received by an antenna with a spectrum analyzer or calibrated receiver.
- If you know the gain of that antenna, it can be used to calculate the power density and fieldstrength.
- Or give the power density and the power in dBm from the reception antenna to the receiver is calculated.