topic Re: Wireless RF Doubt in Wireless

Wireless RF Doubt

veggetvettyu — Wed, 25 Sep 2024 10:44:38 GMT

have a question that might not be well-formed.

In wireless communication, the 2.4 GHz and 5 GHz frequencies are well-known. In the 2.4 GHz band, there are three non-overlapping channels: 1, 6, and 11, which are spaced 5 channels apart. In the 5 GHz band, there are channels 36, 40, 44, 48, 52, 56, and 60, allowing for 24 non-overlapping channels.

So my question is: why is there a 5-channel gap in the 2.4 GHz band and a 4-channel gap in the 5 GHz band? How are these gaps defined, and why isn't there a 4-channel gap in the 2.4 GHz band and a 5-channel gap in the 5 GHz band?

Re: Wireless RF Doubt

Flavio Miranda — Wed, 25 Sep 2024 11:32:12 GMT

@veggetvettyu

For 2.4Ghz, we have in mostly countries 13 channles. Considering a 22 MHZ channel, the non-overlaps ones must be 1, 6 and 11.

Any other way to distribute it, would cause waste of RF channels and or interference. The idea is to aviod co-channel interference as well as adjacent channel interference. If you use change 1 and 5, for example, there will be adjacent channel interference.

For 5.0Ghz it is a bit complex but we can assume the same rules.

Re: Wireless RF Doubt

Haydn Andrews — Thu, 26 Sep 2024 00:58:17 GMT

As per above, its because the centre channels, channel width means that they dont overlap with other channels. The frequencies are not just limited to WIFI as well