how come for my case using the 5ghz band of the 2 separate SSID is faster than combining into 1 single SSID?
brutal honest truth: poor wireless design and wifi is hard to get right
I'd say all consumer wifi routers max out the transmit power on all bands, and this results in a stronger 2.4GHz signal most of the time, especially the further you move from your router.
Client devices are programmed to prefer stronger signal
(simplistic explanation, some devices have more elaborate decision tree), and as you move further from the wifi router, your devices might roam over to the 2.4GHz band if they are not already connected to it in the first place.
Since the 2.4GHz signal will be stronger than the 5GHz signal, your device almost never roam back onto the faster 5GHz signal.
Newer devices have better roaming logic and decision so in certain cases the above won't be as noticible.
My way around it is to design for 5GHz only, then seperate out the bands and turn down the 2.4GHz radio transmit power so the signal from one wifi router doesn't overlap too much with the other wifi router.
Devices that can use 5GHz stay on it, legacy devices use the 2.4GHz only SSID.
By right combining into 1 single SSID should be faster right?
Afaik only on wifi7 with MLO. Wifi standard prior to wifi7 uses only a single band at any one time.
Actually at the end of the day, I don't see any point in chasing wifi 7, MLO, et,al at the moment.
It's good that tech advances, but i still struggle to identify a use case. ~500Mbps over Wifi 5 is good enough for me.
