Just to clarify I am not referring to the "draft n cards

check this out:

www.electronista.com/article...at.last/

en.wikipedia.org/wiki/IEEE_802.11n-2009

from what i understand 802.11 n draft is 2x2 which uses two antennas

802.11 n certified is the final would use 3x3

Number of antennas
The number of simultaneous data streams is limited by the minimum number of antennas in use on both sides of the link. However, the individual radios often further limit the number of spatial streams that may carry unique data. The notation helps identify what a given radio is capable of. The first number (a) is the maximum number of transmit antennas or RF chains that can be used by the radio. The second number (b) is the maximum number of receive antennas or RF chains that can be used by the radio. The third number (c) is the maximum number of data spatial streams the radio can use. For example, a radio that can transmit on two antennas and receive on three, but can only send or receive two data streams would be .
The 802.11n draft allows up to . Common configurations of 11n devices are , , and . All three configurations have the same maximum throughputs and features, and differ only in the amount of diversity the antenna systems provide. In addition, a fourth configuration, is becoming common, which has a higher throughput, due to the additional data stream[7].
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