Template for a 5.8 ghz helical antennas (up to 8 loops). This template allready takes into account that the copper wire will bend back a bit. The measurements of the template are based on this calculater: http://jcoppens.com/ant/helix/calc.en.php If you don't know what a helical antenna looks like or how to build one please search on youtube or google for more information Usage: Take a straight 1 mm copper wire bend the first 5 mm to a right angle an stick it into the top hole. Than wrap the wire tight around the template. Allway bend a loop more than you actually nead. Now take your side cutter, cutt of the angle and turn the helix down the template. According to the calculater the reflector hast to be at least 32 mm in diameter.