Quadrifilar Helix Antenna for 2450 MHz

PLEASE NOTE: There is a bug in this SCAD file. I used D as a radius for the helixes. Please see the comments or edit the file and put [D1/2,0,0] and [D2/2,0,0] into the script.

OpenSCAD script for a 2.4GHz "quadrifilar helix antenna".
Dimensions calculated with John Coppens webpage http://jcoppens.com/ant/qfh/calc.en.php

STL file was reduced in Meshlab.

PLEASE NOTE: This is experimental. You must at least have some advanced radio amateur skills to get any results out of this...
Personally, I have to rely on a colleague at work for the radio stuff.