Unstable wireless network connection - Archer T4E - Connect Box

Unfortunately, 6 meters plus a partition wall is a challenge for 5GHz. Although there is no distortion, the level is quite good, so there could be more.

You have an internal or USB wifi card in your computer - maybe a type? If you don't know the type, how many antennas? Fixed or detachable antennas?

And where is the internet unstable - speed or ping?

Skowra wrote:

Despite the fact that the range is about 90-95%, does it take into account the obstacles on the road?

These percentages are, in your opinion, in relation to what exactly?

Obstacles determine the signal level. If you were at the router itself, it is possible that you would have a signal around twenty-few, thirty-dBm, so at these 6 meters with the door you catch some 20 ... 30dB signal loss. But, in fact, the transfer could be much, much more.

Is it a n or ac connection?

You didn't answer what card, how many antennas.

Sorry, I was reading too fast.

One thing is the location of the antennas - low to the floor, probably close to the wall, and maybe the router on the opposite side of the case. There may be interference from the computer itself and its power supply. Have you tried to get your PC to the desk and align it with the antennas towards the router?

The second thing is the connection settings. Have you checked if you are really ac-connected?

The card has detachable antennas, so yes. Two options are possible:

1. Unscrew the existing antennas and move them to another place, using the appropriate cables (jumpers).

2. The use of new antennas with higher gains (panel, microstrip).

Just remember that each stick has two ends. By using the antenna elevation, on the one hand, a higher signal level in the antenna and its higher quality can be obtained, if directional (panel) antennas are used, which automatically translates into an increase in transfer speed. But the cable connecting the antenna to the card suppresses the signal significantly at 2.4GHz and 5GHz.

1 meter for standard cables has the attenuation:

2.4GHz: ~ 0.4 ... 0.5dB (depending on the type of cable)
5.0GHz: ~ 0.6 ... 0.7dB (depending on cable type)

If there is a connector next to the antenna , then you have to add 1.5 ... 2dB losses on this link. Unfortunately, connectors and their installation in home appliances can be tragic, so it's better to assume a worse variant.
Therefore, it is worth using antennas with a built-in cable equipped with an appropriate connector for the card.

So, for example, with 3 meters and a cable built into the antenna, we would have attenuation q in the range of 1.8 ... 2.7 dB, and the gain from antenna elevation could be, say, a few dozen decibels, so it could be a plus.

Unfortunately, it's a radio, and you can't predict anything exactly here, so in this case only tests could show specific results, but life shows that if you don't overdo the cable length and connectors, you usually have a lot of advantages.

And one more trick, maybe not very "professional", but effective. Taking the current antennas above the desk and adding home-made screens to them. Adding a shield always increases the gain of the antennas in the "forward" direction. Raising the profit to three decibels in theory, in life 2.5 ... 2.8 can be achieved calmly.

Added after 27 [minutes]:

EDIT:

And, with the jumper, first of all, you need to check the connectors. Unscrew the antenna from the card and check the type of connectors. They should be SMA-RP, but who knows ... The jumper should have 2.4 and 5GHz attenuation. Otherwise, you buy a "pig in a poke", the suppression can be any ...

SMA-RP connector