Answer Description
Using "channel bonding" the 802.11n wireless standard is capable of operating on two separate channels at the same time. This feature allows 802.11n networks to double their bandwidth, however it can result in increases interference and power usage.
Wikipedia
IEEE 802.11n-2009, commonly shortened to 802.11n, is a wireless-networking standard that uses multiple antennas to increase data rates. Sometimes referred to as MIMO, which stands for "multiple input and multiple output", it is an amendment to the IEEE 802.11-2007 wireless-networking standard. Its purpose is to improve network throughput over the two previous standards—802.11a and 802.11g—with a significant increase in the maximum net data rate from 54 Mbit/s to 600 Mbit/s (slightly higher gross bit rate …
IEEE 802.11n-2009 - Wikipedia, the free encyclopedia