1.3ghz Right Hand Turn Helical FPV Antenna

thingiverse

To secure the cross on the bed, it's advisable to create a grid first. My math calculations were based on a frequency of 1280MHz. The drone has only been tested for a range of approximately 800 meters. Credit goes to http://www.rcgroups.com/forums/showthread.php?t=1377791. To prevent copper spring-back when winding, a 10% smaller tube can be used initially. A copper sticky contact was utilized for the reflector. Lastly, I drilled a hole in the Cross and enlarged it slightly to fit a screw before gluing it to the reflector (though I might regret this decision later).