If you need more signal in one direction only then I would try one of these Model # S812EA-100 from Home Depot. It’s a piece of 8″ by 12″ metal flashing. Bend it in half so that it forms a right angle 6″ high, place your router on it with the metal perpendicular to where you want the signal to go. I was able to get 4 times the strength with this method, I think they sell for 98¢.
