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Ligne 31 : − + − That results a significant portion of the power is lost in the air. '''The power lost is expressed in dBm''' (see [https://en.wikipedia.org/wiki/DBm dBm on wikipedia]).+
→The game of minimum lost
When doing radio transmission, your devices tries to emit data over the air with electricity.
When doing radio transmission, your devices tries to emit data over the air with electricity.
As you can easily figure out, the air is a very poor electric conductor!
As you can easily figure out, the air is a very poor electric conductor! That results a significant portion of the power is lost in the air.
'''The power lost is expressed in dBm''' (see [https://en.wikipedia.org/wiki/DBm dBm on wikipedia]).
dBm provides a relatively intuitive way to express the power level/power lost of a signal.
dBm provides a relatively intuitive way to express the power level/power lost of a signal.