Is that drawing above the angle of the antenna? My wifi booster (dual band WiEx PCS CEL) with the "Yagi" upgrade is two flat panels with two coax cables and a signal combiner and they are aimed flat or as vertical square plates, I cannot imagine the antenna inside the opaque front panel being at an angle, but that is the extent of my knowlege of Yagi, and I still don't know what Alaric was chuckling about...