Bands, Channels & Widths

Three Bands, Different Tradeoffs

2.4 GHz often reaches farther through obstacles, but shares crowded spectrum with many networks and devices. 5 GHz offers more room for capacity with a different coverage tradeoff. 6 GHz can offer cleaner, wider spectrum, but requires compatible equipment and local regulatory support. Building materials and client radios matter as much as a band label.

Wi-Fi generation and frequency band are different labels. Wi-Fi 6 does not automatically mean 6 GHz; Wi-Fi 6E adds support for that band. Confirm the capabilities of both the access point and client.

Width Trades Peak Rate for Reuse

A wider channel occupies more spectrum. It may increase the peak link rate, but leaves fewer independent channels for nearby access points. More MHz is not automatically a better result in a crowded building.

On 2.4 GHz, 20 MHz is a sensible common starting point. For other bands, use supported automatic planning or a measured design. Channel availability, power limits and DFS requirements depend on location and equipment. Do not copy another country’s channel plan.

A Simple Way to Remember

Think band = neighborhood, channel = lane, width = how many lanes you occupy. The analogy helps explain sharing; it does not model radio propagation or promise speed.

1. Check which bands your devices support.
2. Measure where people actually use the network.
3. Compare one setting at a time and record the result.
4. Keep changes that improve the real workload, not only the reported link rate.