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=gAgBcyNj004Printed in PLA without support or raft. I use desk fan to blow and solidify the PLA quickly after extruding. This helps to avoid adding support structure and give me very clean print out without anything to remove. Use 15 Gauge magnetic wire. A Plier for helping turning the coil to the frame. SMA or RP-SMA PCB connector, male or female (your choice) Double sided copper board.