Helix antennas

Helix antennas are directional antennas for circular polarisation mainly developed for satellite communications but just as well usable for terrestrial operations. Due to physics based reasons the circular polarisation shows significant advantages when the received signal may consist of a mix of all kinds of polarisations 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 polarisation 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. The mast clamp is hot dipped galvanized.


18020: Helix 70

18025: Helix 23

18027: Helix 23-4

18028: Helix 13

18029: Helix 13-40

  Helix 70 Helix 23 Helix 23-2 Helix 23-4 Helix 13 Helix 13-40
Frequency Range 430-440 1250-1300 1250-1300 1250-1300 2300-2450 2300-2450 MHz
Gain Righthand circular 9,5 11 13 16 14 16 dB
Turns 7 10 20 40 (4x10) 21 40
SWR 1,5 1,5 1,5 1,5 1,5 1,5
Max. Power 1000 500 500 1000 500 500 Watt
Connector N socket N socket N socket N socket N socket N socket
Max. Mast Diameter 50 50 50 50 65 65 mm
Length 1,5 0,8 1,3 0,6 0,8 1,25 m
Screen 45 22 22 60x60 10 10 cm
Weight 2,5 1 1,4 2,2 0,7 1,1 Kg
Wind load 125 120 200 350 70 110 @ 120km/h, N
Material AlMgSi 0.5, Screw V2A
Order No. 18020 18025 18026 18027 18028 18029

Gain is relative to crossed dipole.

Order No.
18020 Helix-70 133.40 € Buy now
18025 Helix-23 59.50 € Buy now
18026 Helix-23-2 77.00 € Buy now
18027 Helix-23-4 141.60 € Buy now
18028 Helix-13 100.50 € Buy now
18029 Helix-13-40 122.00 € Buy now
Info freight charges
Download: Mounting instructions helix antenna 70cm (PDF, DE/EN, 100KB)