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Helix Antennas

Helix antennas are directional antennas for circular polarization mainly developed for satellite communications but just as well usable for terrestrial operations. Due to physics based reasons the circular polarization shows significant advantages when the received signal may consist of a mix of all kinds of polarizations due to heavy reflections. As an example: If the phase of a received signal is perpendicular to the antenna plane the resulting signal level can be up to 18 dB (3 S-levels) down compared to a normal yagi! The right-hand circular polarization originates from a helix - the antenna radiates into the direction of the helix. The reflector directs the electromagnetic energy forward; to decrease the antenna's wind load the reflector is perforated (many small holes). All antennas except the type Helix 70-2 are designed for fore-mast installation. By means of power splitters the helix antennas can be combined to form antenna groups of 2 or 4. The antennas have a standard N-connector and are made of non- corrosive aluminum material with all nuts and bolts made of stainless steel.

Helix 70 Helix 70-2 Helix 23
Helix 23-4 Helix 13 Helix 13-40
  Helix 70 Helix 70-2 Helix 23 Helix 23-2 Helix 23-4 Helix 13 NEW! Helix 13-40
Frequency Range 430-440 430-440 1250-1300 1250-1300 1250-1300 2300-2450 2300-2450 MHz
Gain (circular right hand) 9.5 12.5 11 13 16 14 16 dBc
Turns 7 14 10 20 40 21 40
SWR 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Power Rating 1000 1000 500 500 1000 500 500 Watt
Connector N-Connector N-Connector N-Connector N-Connector N-Connector N-Connector N-Connector
Mast Diameter max. 60 60 50 50 50 65 65 mm
Length 1.5 2.9 0.6 1.4 0.6 0.8 1.25 m
Metal Reflector Diameter 45 45 22 22 60x60 10 10 cm
Weight 2.5 4.5 1.0 1.4 2.2 0.7 1.1 Kg
Wind Load 125 225 120 200 350 70 110 N
Material AlMgSi 0.5, Bolts V2A
Gain over cross dipole (dBc)

124 Cherrywood Drive
Mountaintop, PA 18707
       570-868-5643
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