When you plug these numbers into our formula, you get a value of 1.38 km. This is the theoretical transmission distance that can be achieved by your wireless equipment. We could use the same formula to see how much further wireless signals would travel using 9-dBi antennas instead of 2-dBi antennas. (The theoretical transmission distance goes up to 6.92 km). Another way to increase the transmission distance would be to employ wireless devices that offer higher Tx power and/or lower Rx sensitivity.