The Antenna Structure X 4 Mimo 8x8 Mimo. - 1733 Words

802.11n 802.11ac The antenna structure 4 x 4 MIMO 8x8 MIMO Channel width 2040MHz 20,40,80+80 , 160MHz channel frequency 2.4 or 5GHz 5GHz single-stream data transfer rate 150Mbps(40MHz) 433Mbps(80MHz),867Mbps(160MHz) Multi-stream data transfer polymerization rated 600Mbps(40MHz) 1.73Gbps(80MHz),347Gbps(160MHz) Modulation scheme OFDM OFDM A comparison of the feature between 802.11n and 802.11ac 4.1 Work in the 5GHz band 802.11ac only works in the 5GHz band, which means that any equipment want to work in 802.11ac must support 5GHz frequency band. Furthermore, 802.11ac’s chipset also supports 2.4GHz band, to supports 802.11a/b/g/n WLAN and other previous standard, to provide backward compatibility. 4.1.1 Why 802.11ac is 5 GHz only? As we all know 5GHz frequency are poor performance on long-distance transmission and through, we may want to ask why they remove 2.4GHz from 802.11ac. We now commonly used Wi-Fi basically work in 2.4G wireless frequency band, using 802.11b / g protocol. But as more and more equipment is added to the 2.4GHz, the channel became very crowded between 2.4 to 2.485GHz, because too many electronic devices are working in this band (e.g. wireless keyboard, wireless mouse, Bluetooth and other). The crowded channel will make the equipment to seize resources. For example, we are all connected to same wireless router, everyone’s computers and routers must communicate, if only one computer, it is very simple, it can take ‘dialogue’ with router, because there