The good antennas ...

I had a wireless card which dated from about 4 years. I installed my PC upstairs (my router is on the ground floor).
From there, the signal became much lower (2 bars).
I tried a USB key, the result was slightly better but not satisfying.
So I opted for this PCI card 3-antenna and, faith, I found the same performance as before, when my PC was next to the router ...