antenna 2x2, 3x3 의미

It is common to see AP product descriptions with 2×2 or 3×3. The first number is the number of transmit antennas while the second number refers to the number of receive  antennas.

 

 

Sometimes you will see a third number at the end preceded by a colon (e.g. 3×3:3).  The last number refers to the number of spatial streams

 

 

How does a 3×3 AP provide more performance than a 2×2 AP?

All things equal, you can expect more performance from a 3×3 AP than a 2×2 for several reasons. First, for a 802.11ac AP, a 3×3 AP provides a maximum throughput is 1.3 Gbps (3 x 433 Mbps) versus 867 Mbps (2 x 433 Mbps) for a 2 x 2. Note that the maximum speeds are used for reference purposes. In real life applications, the actual throughputs observed are significantly less due to attenuation, and other factors.

 

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https://pakedge.wordpress.com/2015/11/17/2x2-3x3-what-does-it-matterfind-out/