Choosing a router for a home with a strong signal

Question

WiFi

I am looking for a replacement router from Apple AirPort Express. I really like him, but he does not catch everywhere. In my apartment, one of the rooms is separated by a small blind corridor with a turn, an obstacle to the signal is almost 3 concrete walls. Because of this, the signal is caught weakly and the Internet is slow.
The room uses a phone, a tablet, 2 computers, a printer and a TV. The TV is constantly connected to Internet TV.
You need a Wi-Fi router with a stronger signal than it is now, compact, preferably without external antennas. There are only 3 devices in the house: 3 tablets, 3 phones, 3 TVs with internet connection and 3 computers. In all other rooms wi-fi catches perfectly.
Before AirPort was DrayTek VigorFly 200, but it also fell short.

Answer 1

You just need two, in different parts of the apartment. Connect with a cable (more reliable) or into wi-fi repeater mode, virtually any router can now do this, even the cheapest ones for 1000 rubles.

Answer 2

Stably every week, 2 questions about routers, each time all the advice comes down to tp-link with alternative firmware like openwrt and mikrotiks.

Answer 3

The terms "strong signal" and "no external antennas", to put it mildly, are somewhat contradictory;)

Answer 4

See what's on the air.
If you are in Moscow, then there are probably a lot of other networks nearby that interfere ... damn interference (hello GPON)
Based on the information received, try playing with the channels. Unfortunately, 13 channels may not be enough for this, but still.

Answer 5

I advise Mikrotik, but three concrete walls, I doubt that you can do without antennas...

Answer 6

Look towards the company Ubiquti
for example unifi
I think that you will choose a more optimal set for yourself.