In 802.11n MIMO how we are acheiving more range?

[ceg]

Hi,
In 802.11n We are trasmitting with more antennas, so as per RF rule we are dividing the power, then range should reduce. but in MIMO how we are getting more range?

Thanks

 

[BradtheRad]

I saw someone on a message board state that when a wifi card has two antennas, it's not to give it a choice to use whichever gives the best signal. But rather because they're optimized, one antenna for transmitting, one for receiving.

The N protocol uses both 2.4 and 5 GHz. By transmitting on a higher frequency it extends the range of reception. It also uses greater bandwidth.

In any case I imagine the base transmits on 5 Ghz using one antenna, whereas it receives 2.4 GHz through another antenna.