SWRU423A July 2015 – May 2016 WL1801MOD , WL1805MOD , WL1807MOD , WL1831MOD , WL1835MOD , WL1837MOD
WiLink8.0 supports a practical approach of using 40-MHz channels, but in a 5-GHz band. Using 40-MHz channels or the busy 2.4-GHz band is not advised; use the SISO20 or MIMO20.
Typically, 802.11n allows the configuration of 40-MHz wide channels. Because adjacent channels need a slight gap between them (to separate them in the frequency band), a single 40-MHz channel has slightly more than twice the bandwidth of two adjacent 20-MHz channels (because the inter-channel frequency gap is now part of the actual channel space). Therefore, a 40-MHz 802.11n channel provides slightly better than twice the throughput capacity of a single 20-MHz 802.11n channel. If an 802.11n transmitter is operating in a 20-MHz channel and can establish a 72.2-Mbps connection, then a 40-MHz channel would provide a 150-Mbps connection; double the channel width to double (plus about 4%) the capacity of the resultant double-wide 802.11n channel.