Do Wi‑Fi 5 GHz channels overlap?

✅At 20 MHz channel width

No — 5 GHz channels donotoverlap.

• 5 GHz channels are20 MHz wide

• Channel center spacing is20 MHz

• Each channel sits neatly next to the next one

Example:

Channel 36: 5180 MHz Channel 40: 5200 MHz Channel 44: 5220 MHz Channel 48: 5240 MHz

So unlike 2.4 GHz, you can usemany independent, non‑overlapping channelsin the 5 GHz band.

✅ This is why 5 GHz performs much better in dense environments.

⚠️ When overlapdoeshappen in 5 GHz

Overlap appearsonly when you use wide channels.

Channel bonding examples

Example (80 MHz):

Primary ch 36 Uses: 36 + 40 + 44 + 48

So:

• Channels don’t overlapat thebasic 20 MHz level

• They do overlap intentionallywhen bonded for higher throughput

This iscontrolled and expected overlap, not accidental interference like in 2.4 GHz.

Comparison with 2.4 GHz (why this confusion exists)

In 2.4 GHz:

• Channel 6 overlaps with 4–8

• Only3 clean channelsexist (1/6/11)

In 5 GHz:

• Each 20 MHz channel is clean

• Even with bonding, overlap isplanned and synchronized

Practical engineering takeaway

✅Correct statement:

Wi‑Fi 5 GHz channels are non‑overlapping at 20 MHz.

⚠️But remember:

Wide channels (40/80/160 MHz) intentionally span multiple 20 MHz channels.

Embedded / NXP / AzureWave note (relevant to you)

• Your firmware always works in20 MHz units internally

• “Overlap” from 80 MHz is justchannel aggregation

• Regulatory rules (DFS, country code) still apply per20 MHz channel

This is why:

• Scanning is done per 20 MHz

• DFS is evaluated per 20 MHz

• Channel availability tables list 20 MHz channels

One‑line answer you can use in documentation

Wi‑Fi 5 GHz channels do not overlap at 20 MHz; overlap only occurs intentionally when using bonded (40/80/160 MHz) channels.