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Email: info@starantenna.com    Website: www.starantenna.com


QUADRIFILAR HELIX ANTENNA
SQFH-13705 137 MHz 5 dBi. Gain


Quadrifilar Helix Antenna for Weather Satellite Atmospheric Research purpose provides horizon to horizon coverage.

Quadrifilar Helix Antenna uses a self facing design and is a full wave Helix for perfect RHCP/LHCP, circularly polarized, suitable for a Pole-Mount.

The Helix uses copper tubing for filar windings and the low VSWR below 1:1.5 provide perfect matching and increased antenna efficiency with the peak gain of 5 dBi.

Filars are held symetrical to the vertical axis to maintain purity of the radiation.


ELECTRICAL DATA
Frequency Range (MHz.)137
Gain (dBi.)5 dBi.
Bandwidth (MHz.)5
PolarizationRHCP/LHCP
Input Impedance (Ohms.)50
Beamwidth 3db (Degrees)>150
VSWR1:1.5
RF Power Handling Capacity (Watts)50
Input TerminationN/TNC Female
MECHANICAL DATA
MaterialsCopper
Mounting HWStainless Steel
Weight (Kgs)4
Wind Rating (KMPH)150
Mounting TypePole Mount U Clamp

Please Note:   1. Specifications are subject to change without any notice.
2. Customized in-band and out of band versions are available on request.


VSWR CURVE
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AZIMUTH RADIATION PATTERN
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ELEVATION RADIATION PATTERN
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