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This is the 2.4 GHz version of our parasitic disk helix, this is also LHCP to match the LHCP patch antennas on the Phantom Vision 2. Gain is between 9 and 10 dBi, despite the small form factor. The antenna allows a maximum distance of 1.3km in FPV mode with the Phantom going away from you. For best performance, a matching LHCP pinwheel can be ordered.
This antenna set works quite well, and it does provide improved video between 1-2 km on Hobbyking/Foxtec system (choose RP-SMA male connectors), or on Fatshark/ImmersionRC systems (choose SMA maleconnectors) Range may vary, one customer claimed a record distance of 5.5km with just fatshark attitude + 600mw irc transmitter and this pair of antennas. These pinwheels can be used also with our 8 turn Helical for ranges up to 10KM* (400mw foxtec tx + rc305 rx)
This Helix has a lower gain, as compared to our 8 turn one, and can be used in place of a patch for Circular Polarization. with a gain between 6.5-8 dbi , it can be used without a tracker, just aim in the general direction of flight! It can be also made with a 90° connector for mounting to the fatshark and aim it by facing the model.
This is a new development for FPV antennas. It's a 2.75 turns helix, the turns are more closely spaced than a conventional helix, and it uses a parasitic disk to achieve higher gain (9.3dBi) and better axial ratio compared to a regular helix. The result is a very compact moderately directional antenna with very good efficiency, and same gain as a 3 turns conventional helix. The total length is less than half that of a comparable 3 turns helix, which is slightly more than a linear patch antenna which shines if attached directly to your FPV goggles. The ease of aiming this is unbelievable it feels almost as an omni when flying your course nearby and it becomes slightly directional with very wide beam width when going far. We have taking our racing quad to 3-4km with a 200mw VTX and this antenna.