ULRS Range Estimator


It’s often difficult to evaluate the maximum range of a given system, because it will vary with its power, the antennas used and their position, the coax cable length and many other parameters.

But it’s easy to know the maximum range once we know the RSSI at any other range, because the RSSI in dBm follows a very simple mathematical rule : it decreases by 6 dBm every time the distance is doubled.

As we know precisely the minimum RSSI required for ULRS, the current distance and the current RSSI, we just have to apply a formula to get the maximum range.

To simplify your life I’ve made a table showing the maximum range, if we know the RSSI at another (small) distance.

Click here to start using the ULRS range estimator !