Radio Operating 5GHz links Band EU & UK
5GHz spectrum in the EU – UK runs from 5150MHz (5.15GHz) to 5850MHz (5.85GHz). This is broken down, 3 different bands (Band A, B and C). Each band has its own maximum allowed effective radiated power output and specific rules as to where it can be used and whether a license is required to operate within it. Internet cyprus provider Limassol Wirelless.
|-Band||-Low||-High||-Indoor/Outdoor||-Max Power Level||-License Requirements|
|.B||5470MHz||5725MHz||Indoor/Outdoor||1000mW (1W)||.License Free|
|.C||5725MHz||5850MHz||Outdoor (FWA)||4000mW (4W)||.Licensed|
Here Band A (.Channels 36 – 64)
Band A used for Indoor wireless only and does not require a license. It is a 200MHz wide band which allows for 8 x 20MHz channels to coincide without overlap or 4 x 40MHz. The maximum output power is 200mW which is double the allowed output power of 2.4GHz. Now you may be thinking “great – my wireless is going to transmit further!”… Unfortunately, its not quite that simple as the wavelength of 5GHz is roughly half that of 2.4GHz meaning you need to transmit at twice the power to get the same distance. Due to the shorter wavelength, 5GHz also has the worse penetration than 2.4GHz so doesn’t pass through walls and obstacles as well, it does however scatter much better.
I will cover this in more detail in part 2 of the blog, but the bottom line is for indoor use 2.4GHz should be your weapon of choice unless the 2.4GHz spectrum is too crowded or your building is open plan.
And Band B (Channels 100 – 140)
B. Band is also license free and can be used both inside and outside. Has a higher permitted output power of 1000mW (1W). Being 255MHz wide it allows for 10 x 20MHz channels to coincide without overlap or 5 x 40MHz channels. All hardware operating in Band B must conform to DFS (Dynamic Frequency Selection) standards and DFS must be enabled
Band C (Channels 149 – 161)
The 1000mW output power limit that Band B offers isn’t enough to suit your needs, then have no fear – Band C is here! Band C can be used with output powers of up to 4000mW (4W). There are some conditions however:
- a) Band C can only be used for outdoor wireless
b) Band C can only be used for fixed wireless access (FWA) points (e.g point to point or point to multipoint links)
c) A light license is required for operation and must be purchased from Ofcom.
d) All hardware must conform to DFS (Dynamic Frequency Selection) standards and DFS must be enabled
Band C is 125MHz wide and allows for 4 x 20MHz channels to coincide without overlap or 2 x 40MHz channels.
For 5GHz Licenses in Band C
If you want to use 5GHz in Band C, you will need to get license document from Ofcom stating that you have permission to do so. Now before you start getting worried about costs for spectrum licenses, currently a Band C license costs only £50 a year for up to 50 devices and for each additional device you want to register, it is an extra £1 per year.