Wifi-802.11 2.4G band 5g band channel frequency allocation table

WiFi-802.11 2.4G Frequency band 5G Frequency band Channel frequency allocation table

Just remember

2.4G Frequency band

• Center frequency range 2.412GHz-2.484GHz
• Center frequency point spacing of adjacent channels 5MHz, Adjacent multiple channels have frequency overlap , There are three groups of channels that do not interfere with each other （1、6、11 or 2、7、12 or 3、8、13）
• It's divided into 14 Channels , Available in China 13 Channels （1-13）, Available in the United States 11 Channels （1-11）, All countries consider security and other aspects , Open channels are not consistent . Refer to the country code and channel compliance table
• WiFi 802.11 b/a/g/n There is also a slight difference in the frequency bands used （802.11b Only 20MHz bandwidth ）, Reference resources WiFi 802.11 Negotiation rate
• Channel effective bandwidth 20MHz, Actual bandwidth 22MHz, among 2MHz Is the isolated frequency band

2.4G Channel number and center frequency ：

5G WiFi Frequency band

The frequency range is 5150MHz - 5825MHz, Be commonly called 5G Wi-Fi Frequency band , There are... In this frequency band 201 Channels , however , It can be Wi-Fi The protocol uses very few channels . as a result of 5G The frequency of is very special , Even national security , because 5G wifi Its frequency coincides with the military radar frequency band , therefore , Many countries are based on national security considerations , Yes 5G Band has reservations .

• The central frequency point spacing of adjacent channels is still 5MHz

• In China, , Only 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165 this 13 Channels can be used for 5G Of wifi Internet use .

WiFi The default channel for is 20M, In the early days there was 10M Of , Now the agreement also includes , To speed up , Can be 2 The channels are combined to form 40M Channel of , One of them acts as the primary channel 20M, in addition 20M As an auxiliary channel , The primary channel is lower than the secondary channel , The new channel is called 40M+ channel , Otherwise 40M- channel , Main channel transmission beacon Message and partial data message , The secondary channel sends other messages （ According to memory , Please correct me ） , Similar to that HT80,HT160, So we only look at the channel 20M Channel of

China is open 5G WiFi Frequency band ：

5G Channel number and center frequency ：

（ Range marked in yellow ）

It mainly refers to HW WiFi Country code and channel compliance table