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 Model AH-312 240-380 MHz 12 dBi Gain 


Design Features: AH-312 circular polarized helical antenna is highly suitable for SATCOM ground station application. The AH-312 uses extended stubs to provide the greater gain while maintaining the wider beam-width. This high-gain low-profile antennas use Circular Polarization Antenna Technology - which delivers better penetration through obstruction and interference. This commercial grade antenna provides superior performance as compare to significantly larger and more expensive products. Our AH series helical antennas are smaller than conventional yagi antenna. The AH-312 Helical Antenna can be supplied with a specially designed mounting arrangement for steering the antenna in both planes, over 360 Degrees in Azimuth and 90 Degrees in Elevation for terrestrial and Satcom links.

Constructions: The AH-312, like all our AH series helical antennas, utilizes circular polarization to minimize the effects of multipath interference. Both Right Hand Circular Polarized (RHCP) and Left Hand Circular Polarized (LHCP) helical antenna models are available. The AH-312 Helical Antenna is light weight, broadband and rugged helical antennas, supplied with fiberglass radome to protect the antenna from environment. Cylindrical enclosure is used for low wind loading and for minimal effect of ice formation on the helical antenna operation as well as providing an aesthetically pleasing appearance.

Array Formation: For higher gain requirement, the Helical antenna can be supplied in DUAL stacked or QUAD stacked arrays with suitable power splitter/combiner cable harness.

Electrical Specifications:
Frequency Range240-380 MHz
Gain12 dBi
Antenna TypeHelix
PolarizationCircular - LHCP or RHCP
Input Impedance50 Ohms
Radiation PatternDirectional
Horizontal Beamwidth -Half Power Points45 Degrees Typical
Front to Back Ratio20 dB. Typical
VSWR - Equal To or Better Then2.0:1
RF Power Handling Capacity500 Watts
Input TerminationN-Female

Mechanical Specifications:
Antenna MaterialsFiber Glass, Copper & SS
Mounting Hardware -MaterialsMarine Grade Stainless Steel
Wind Rating200 KMPH
Overall Length1500 mm
Shipping Length1650 mm
Radiating MaterialHigh Quality Copper
Mounting Clamps PositionAt Rear End of Antenna
Maximum Mount Pipe Diameter 52 mm
Radome MaterialHigh Strength Fiber Glass
Radome Outer Diameter430 mm
Radome Length1500 mm
Reflector Diameter500 x 500 mm
Gross Weight24 Kgs.

Environmental Specifications:
Operating Temperature(-) 30 to +70 Degrees Celsius
Storage Temperature(-) 430 to +80 Degrees Celsius
Humidity0 to 100% RH