Frequency Bands Used in WLANs

   Electromagnetic Spectrum

ELF : Extremely Low Frequency , 

ULF : Ultra Low Frequency

SLV : Super Low Frequency ,   

VLF : Very Low Frequency

 Usable Frequency Bands in Europe , USA and Japan  

Band Used 

—900Mhz:

Range : 902 MHz to 928 MHz

Used :Cordless phone

—2.4 GHz:

Range : 2.400 GHz to 2.4835 GHz

Used :Wlan (802.11b, 802.11g and 802.11n)

Possible Channels : 11

Non overlapping : 3

—5Ghz

Range : 5.18 GHz to 5.8 GHz

Used :Wlan (802.11a,8021.11n and 802.11ac)

Possible Channels : 24

2.4Ghz Band   

Non Overlapping Channels For 2.4Ghz Wlan

5Ghz channel uses