Features
Four-arm helical antenna series covers single-frequency, dual-bland single-frequency dual-band, dual-bland dual-frequency,multi-bland multi-frequency and other combinations, with a variety of OEM board to meet the needs of high-precision measurement equipment Widely used in high-precision mapping and military positioning, widely used in unmanned aerial vehicles, geodesy, road construction,marine survey, terminal container operations,combat exercises, border guards and other occasions.

Specifications
1. the antenna using fo-u r -wallspiral design and completely symmetrical antenna structure, to achieve the centerof the center and geometric center coincidence,reducing the antenna on themeasurement error;
2. with high vertex gain, good low elevation gain, wide anglecircular polarization characteristics;
3. built-in voltage regulator circuit, the effective protection ofthe amplifier;
Antenna indicators
-Frequency Range: GPS: L1/L2
-GLONASS: L1/L2
-BD2: B1/B2/B3
-Impedance: 50Ω
Polarization mode:
right-handed
circular polarization
The antenna axial ratio: ≤3dB
Horizontal coverage angle: 360°
Output standing wave:≤1.5
Vertex gain: ≥2.5dBi
Low-noise amplifier index
Gain: 35dB
Noise figure: ≤2dB
Output standing wave: ≤2
Anti-burn power: ≥6W
Operating Voltage: 3~5VDC
Operating Current: ≤25mA
Structural properties
Size: Φ31×54mm
Connector Type: SMA-J
Weight: 19g
Environmental
Working Temperature: -40°C to +85°C
Storage Temperature: -55°C to +85°C
Working storage humidity:95%(no condensation)