Model QHA-850 700-1000MHz 3 dBic Gain 


Design Features : QHA-850 broadband omni-directional RHCP quadrifilar helix or LHCP quadrifilar helix antenna is rugged all weather model, enclosed in a ABS radome, uses high class copper alloy and does not require any field tuning or adjustments. The compact size of LHCP or RHCP omni-directional quadrifilar helix antenna allows easy handling, shipping and highly suitable for receiving, transmitting, scanning, monitoring, surveillance and jamming applications for GSM CDMA bands without having the requirement of multiple antennas. The antenna is also highly suitable for Ground to Air communication/jamming application due to its wide elevation beamwidth with omni-directional properties. Antenna termination fitted just below the NATO mounting flange for complete weather protection. Other type of mounting hardware / configuration can be supplied on request.

Constructions :The QHA-850 LHCP or RHCP quadrifilar helix antenna is consisting of two (pair) vertical loop radiating elements at right angles to each other, twisted into a helix turns vertically and enclosed in ABS radome. The special “Teflon Dielectric Transmission Line” technique is used to handle high power handling capacity allowing smooth VSWR and typical 3dBi. gain over the specified frequency band. The UV resistant ABS enclosure has excellent transparency for RF signals and enough strength to withstand specified wind loads. The stainless steel mounting hardware is supplied with the antenna. Cylindrical shell/enclosure is used for low wind loading and for minimal effect of ice formation on the antenna operation as well as providing an aesthetically pleasing appearance

Electrical Specifications:
Frequency Range700-1000MHz
Gain3 dBic
Bandwidth700 - 1000 MHz
PolarizationCircular - RHCP or LHCP
Input Impedance50 Ohms
Radiation PatternOmni-directional
Beamwidth -3dB.120 Degrees (Vertical)
VSWRBetter Than 2:1
RF Power Handling Capacity1000 Watts
Input TerminationN-Female

Mechanical Specifications:
MaterialsCopper, Fiberglass
Mounting Hardware -MaterialsMarine Grdae Stainless Steel
Wind Rating200 Km/Hr.
Mounting TypeVertical Pole or NATO 4 Holes
Overall Length250 mm
Shipping Length300 mm
Radiating MaterialHigh Quality Copper
Maximum Mount Pipe Diameter 51 mm (2 Inches)
Radome MaterialFiber Glass
Radome Outer Diameter160 mm
Radiating Elements - MaterialHigh Quality Copper
Gross Weight2 Kgs.

Environmental Specifications:
Operating Temperature(-) 30 to +60 Degrees Celsius
Storage Temperature(-) 40 to +70 Degrees Celsius
Humidity0 to 95% RH