TRANSMIT POWER CALCULATIONS

For every 3 db increase in power the equivalent power in mw gets doubled i.e if initial Tx power is x dbm equivalent to y mw and if we increase the power to (x+3)dbm then it will be equivalent to 2y mw it means the Tx power doubles in mw for every 3db increase in power and similarly the Tx power becomes half in mw for every 3db decrease in power.

Similarly power becomes 10 times in mw for every 10 db increase and becomes 1/10 in mw for every 10 db decrease.

As the above calculations are valid only for 10db and 3 db it is called as rule if 3s and 10s.

Note : Above calculations is very useful when designing the wireless network but for product and circuit designing logarithmic calculation is best.