The location is one of the most important aspects to consider, in order to select the best channel for the 5GHz band. Channel Width of each channel is 20Mhz. Almost, every country utilizes the UNII: 1 sub-band for general internet usage. Table 1: 20 MHz channels on the 5 GHz band. There are UNII bands 1,2,3 and 2e. (Range: 100MHz) Total of 23 channels are present in the 5GHz range and all the channels are non-overlapping and we get a range of 550MHz to transmit data. Note: the FCC is currently considering whether to add two more U-NII bands in the 5 GHz band. At 5GHz there are four “Bands” available, each containing a bunch of WiFi channels. This paper describes the current development of the 5 GHz building blocks and the baseline radio. This would be U-NII-2B, 5.350 – 5.470 GHz and U-NII-4, 5.850 – 5.925 GHz .

Creating 40 MHz, and larger channels involve bonding multiple neighboring channels together. With 5GHz however your legal limits are defined by which frequency you are operating within and which frequency you need to operate within is defined by your link requirements. Re: 5Ghz UNII-3 band C in UK ‎08-28-2018 09:19 AM Hi, just happened to find this whilst searching for info on whether the new UK channels are now supported on Aruba kit. Now, just above and below these bands are licensed bands where you have things such as the 4.9 GHz Public Safety band and 6.0 GHz licensed band. This is to restrict the module to operate outside the parameters it was certified with. But it has also contributed to its woes, as unlicensed spectrum … The four bands in the 5GHz spectrum are: U-NII-1 (lower) comprises four 20 MHz … The availability of unlicensed spectrum in the 2.4-GHz and 5-GHz bands has driven Wi-Fi growth. The lowest 8 channels currently used lie in the 100MHz bands UNII-1 and UNII-2. There are a total of 23 U-NII channels available for use. This is then broken down into 3 different bands (Band A, B and C). Wi-Fi 5 and Wi-Fi 6 (802.11ax) standards added support for an 80-MHz and 160-MHz channel width to allow for higher data speed. The UNII-2B range sits between 5,350MHz and 5,470MHz.

In order to use this range, your device needs to be equipped with Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC). The 5GHz spectrum in the UK runs from 5150MHz (5.15GHz) to 5850MHz (5.85GHz). In the USA UNII-1 can only be used indoors. Here’s an image to give you an idea.

Both UNII-2 and UNII-3 can be used indoors or outdoors. Wi-Fi networking provides us with 2 bands for the operation of wireless LAN networks: the 2.4Ghz band and the 5GHz band.