Bad reception 5ghz network?

Again and again we have problems with hanging Wi-Fi, bad connections or something.

As an additional information: The Wi-Fi router (Fritz box 7490) is in my mother's room.

My father had to buy my mother a new laptop because hers no longer worked, and I had to set everything up because I know it best.

So far so good, when I did a speed test on google for the sake of fun, I almost got my eyes off my head: With the 5ghz it had all 5 bars in windows and a speed of 420mbits, i.e. Almost the entire bandwidth that our contract provides 500mbits).

on the first floor we only have 3 or 4 bars, and then have about 30mbits.

I bought a good Wi-Fi card because I was fed up with the bad network but it didn't bring anything. Only the network was more stable.

My question now; would that be a case for a good repeater?

could it be that the reinforced concrete ceiling is responsible for the fact that so little transmission power arrives here?

I would be really happy to answer…

The 5 Ghz band is only designed for short ranges, but you create full power with it.

The 2.4 GHz network is more suitable for longer distances. If it doesn't get any better, you can expand your Wi-Fi network using a repeater, powerline or mesh system.

As I said with the 2.4ghz network the speed is not better, it is also at 30mbits. I'm interested in speed.

Sorry, the addition came too late for me 😅

The router is best to be placed above, as the radio wave radiates downwards. If that is possible with you, give it a try. If not, there's no way around expanding the network.

Personally, I work with Powerline and I'm quite satisfied. But it's certainly better. Newer mesh systems are very interesting.

Okay, you could just lay a lan cable with 20 meters through the house, we have a house with maybe 70m² so that shouldn't be a problem…

That would of course be the optimal solution.

I've never really measured more than 40 Mbit / s in the 2.4 GHz band, even right in front of the router. In that respect it fits.

Otherwise, the signal strength drops extremely quickly at 5 GHz if you move away from the router and a reinforced concrete ceiling is not exactly ideal either.

In your case, it would make the most sense to move the router upwards, if that is easily possible.

My father had to buy my mother a new laptop because hers no longer worked

Exciting. It's good that my wife is buying the computer herself…

and I had to set everything up because that's what I know best.

and set up according to your wishes.

So far so good, when I did a speed test on google for the sake of fun, I almost got my eyes off my head: With the 5ghz it had all 5 bars in windows and a speed of 420mbits, i.e. Almost the entire bandwidth that our contract provides 500mbits).

Which is not particularly surprising in the immediate vicinity of the WLAN router.

on the first floor we only have 3 or 4 bars, and then have about 30mbits.

Which is not a surprise either, because the range of a 5 GHz WLAN is not outstanding.

I bought a good Wi-Fi card because I was fed up with the bad network but it didn't bring anything. Only the network was more stable.

So it had made a difference. But a WLAN card can't do magic either.

My question now; would that be a case for a good repeater?

A repeater is usually not ideal. The repeater must be positioned relatively close to the WLAN router. A repeater reduces the data rate by about half. This is a matter of principle. A mesh repeater (which is a lot more expensive) could give better results.

could it be that the reinforced concrete ceiling is responsible for the fact that so little transmission power arrives here?

Naturally. The increase would be underfloor heating.

It should also be mentioned that we did not have better results with the 2.4 GHz network, despite the repeater (we only reinforced one of the 2.4 GHz network).

A repeater does not amplify. A repeater that is installed sub-optimally can't produce good results. The repeater must have optimal reception from the wireless router.