Tech-bite

Fitting a simple, passive, parabolic reflector around your wireless antenna can focus the signal exactly where you want it. Your network will have better coverage, and the addition can even improve your network security.
1. Download parabola calculator (mscir.tripod.com/parabola) to help you figure out the correct antenna shape.
2. Enter a diameter and depth to represent the maximum size of reflector that your router's antenna(s) can physically accomodate. The software will create a table of points for you to plot onto a graph paper.
3. Cut out the inside of the parabola shape on two pieces of cardboard.
4. Cut a smooth piece of metal to serve as the reflector.
5. Curve the metal into a U-shape around the guides, and glue it in place. Cut small holes into the guides at the focal point, and mount the reflector.