5.8Ghz Helical Antenna with Dowel Template for Turning
This is still work in progress. I don't have any measuring devices to actually measure the signal but had a good results with it. One thing to note that I soldered the tip of the first turn to the center pin as close as possible to the reflector but not touching/grounding it.
https://www.youtube.com/watch?v=gAgBcyNj004