hey Bell, their are some tricks to boost antena signals. depending on the antena. I'd suggest you check it out of youtube.
I used to use a metal bowl to boost the celular connection it would do a world of a differance. it works like a satellite dish.
so you could just take a metal bowl and place it behind your router facing the direction you lack connectivity.
or strip the antenna of your router, twist a coper wires around it and make it extent as far as you want. you could make it go around the house even =P make sure you have you home wifi signal even at the corner store lol