A Quadrifilar helix antenna is an advanced type of helical antenna. It can be identified by its four conductive wires wound around a central axis in a helical pattern. The best helix antenna that is distributed by Antenna Experts is suitable for many applications, such as GPS systems, satellite communication, and much more. For purchasing directional, omni-directional, or semi-directional antennas, you can visit us for more details!