Required Amplifier Power for Desired Field Strength

An amplifier is used to boost the RF signal before its transmission through the antenna. It is necessary to select an amplifier with an appropriate output power for the antenna in order to transmit the RF signal to the desired receivers.  

This calculator will determine the required output power of the amplifier when the desired field strength, antenna gain, and distance are entered in the input.

The amplifier power is expressed as:

Where, 

P is the antenna power in W

E is the desired field strength 

D is the distance in m

G is the antenna gain in dBi