The N spec is able to use 40MHz of bandwidth for increased data rates, but to maintain compatibility with legacy systems, it requires one main 20MHz channel plus a free adjacent channel at ±20MHz. The main channel is used for legacy (a/b/g) or other clients that aren't able to transmit at 40MHz. The spec also requires the whole WLAN to only The draft 802.11n standard adds the 40 MHz channel offering, which approximately doubles throughput. Using 40 MHz channels is also called channel bonding because two channels are bonded and used as one. For example, on a 5 GHz band, 20 MHz channels that can be bonded into one 40 MHz channel are 36+, 40-, 44+, 48-, and so on. 36+ implies that The operating frequency bandwidth is the bandwidth of the frequency band on which an AP works. A larger value indicates a stronger air interface capability and a higher rate. The value can be 20 MHz, 40 MHz, 80 MHz, or 160 MHz. The default value is 20 MHz. To query the operating frequency bandwidth of an AP, run the display radio all command on Whilst channel bonding is ill-advised in the 2.4GHz band in a real deployment scenario, 802.11n technologies using MIMO-OFDM can make use of 40MHz wide channels, as opposed to the commonly used 20MHz wide channels. 40MHz wide channels are essentially impossible to use in practice, due to their occupation of an already narrow/saturated spectrum. W-Fi 6E uses the same 802.11ax technology for wireless connection, but extends this to a new WiFi band called 6GHz. It utilizes up to 14 additional 80MHz channels or 7 additional 160MHz channels, which makes it suitable for applications such as HD streaming or VR experience. Only devices that support WiFi 6E can connect to the 6 GHz WiFi I’ve increased my channel width to 80mhz for my 802.11ac clients using the 5ghz band and saw a considerable (double) increase in throughout from the 40mhz channel width. However, there is definitely an inversely proportional relationship between channel width and saturation. The wider channel widths oversaturate much quicker. i3HlnOg.

difference between 20mhz and 40mhz wifi