If your WAP has an external antenna and you need signal at a particular spot (like a shop) take an empty Pringles can, pokes a couple holes 180 degrees out at ~2-1/2" from the closed end, slip it over your antenna(s) and aim the open end(s) at the area. Waveguides on the cheap and dirty. The distance from the holes to the closed end actually matters as a fraction of the wavelength, just search 'pringles can antenna' for exact dims.. I've used it on construction sites, it works.