DBI full form – Decibels referenced to Isotropic gain

When an antenna is measured for its sending or receiving power,this is known as “gain” and it is measure in Decibels – dB.DBI is the gain in power of an antenna for radiation given out by the signal of the antenna.

It should be remembered that just like DBI,there is also a dBm which is also a measure for gain,but this is calculated in mill watts.