Antenna HELIX 2.4GHZ

helix for TX oscar-100 sat LHCP,
A reflector is needed in the lower part, and later adjustment of the cable that goes to the connector with VNA meter

1, 2, 3, 4, clockwise to LHCP
1, 2, 3, 4, counter-clock wise to RHCP


Frequency = 2405 mhz
Wavelength = 124.7 mm
Ideal diameter (internal) = 42.2 mm
Gain = 9.39dBi
Conductor diameter = 1 mm
Winding step (between centers) = 28.6 mm
Total conductor length = 680 mm + (29mm if you like put connector outside as image)
Minimum reflector