Whenusing 5 GHz, it is recommended to use at least 40 MHz channel width, as some client devices may not prefer 5 GHz unless it offers a greater channel width than 2.4 GHz. What is 20MHz bandwidth? 20MHz Bandwidth As for today, most of the wifi customers use it for video streaming, and the bandwidth they use is 20MHz with a frequency of 2.4GHz.Accordingto the WiFi 802.11b/g/n standard, channel widths of 20MHz or 40MHz can be configured in 2.4GHz WiFi networks. For simplicity, 20MHz channels have been represented, but the same situation occurs with 40MHz channels, occupying in this case twice the width. This is the reason why it is said that the best channels are 1, 6 and 11. Having Inthe world of wireless networking, after using numbers and initials for years—802.11b, 802.11g, 802.11n, 802.11ac—we're suddenly using a simple, single digit: Wi-Fi 6.Thenew space will be enough for 11 more 20MHz channels, six more 40MHz channels, three more 80MHz channels or two more 160MHz channels. This will make using the larger channel-widths much more 1CyberneticTitan Member Enthusiast 1.3k 34 Posted May 24, 2017 In general, If 2.4Ghz -> 20Mhz If 5Ghz -> 40Mhz If you're fairly wirelessly isolated and you have modern devices, go for 40Mhz.
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Inthe US, the 2.4 GHz band includes 11 usable 20MHz channels (from 1 to 11) and has been that way since the birth of Wi-Fi. Things are simple in this band. The 2.4GHz band uses channels of 20MHz or 40MHz width. The wider the width, the fewer channels you can get out of the frequency -- the entire band is only so wide.Mylaptop only supports 2.4ghz so I can't use 5ghz with my internet connection. The router bandwidth has always been 20mhz and I'd get around 30-50mbps out of the 100mbps that my internet offers, but a few hours ago I tried switching the bandwidth to 40mhz and the speed went to 85mbps, I did multiple speed tests and got the same result.jWAAA.
