Slow wifi far from router

Hello,

I had problems with my rear camera so I changed it. But when I quited the plastic piece that push the motherboard, I had problems with the photo´s piece.

And now I have problems with the wifi conecction, because when I far from router It has rssi=-84. And the wifi is very slow, even it goes down. So I would like to know if this piece damaged, belong to wifi antena.