GeoAstra ANT308 L1, L2 Dual band RTK High-Precision Active Helical Antenna
The GeoAstra ANT308 is a state-of-the-art multi-frequency active helical antenna designed to deliver high precision and reliability for GNSS applications. Incorporating advanced multi-arm spiral technology, this antenna supports dual-band satellite signal reception (L1 and L2) from GPS, GLONASS, Beidou, and Galileo systems. It is tailored to meet the demands of modern multi-system compatibility and high-precision requirements, making it an ideal choice for handheld GNSS positioning equipment, UAVs, navigation, and other high-accuracy GNSS receiver applications.
Features
• Multi-Arm Spiral Technology: Ensures right-handed circular polarization and stable phase center performance, reducing measurement errors.
• High Gain and Minimal Gain Roll-Off: Provides excellent reception for low elevation satellite signals, increasing the number of available satellites and enhancing positioning accuracy.
• Ingenious Low Noise, High Gain Amplification: Built-in low noise amplifier (LNA) with pre-filtering technology effectively suppresses out-of-band interference signals, ensuring high signal quality and system reliability.
• Compact and Lightweight Design: Small size and light weight make the antenna easy to carry and install, ideal for portable and field applications.
• Durable and Reliable: IP67-rated enclosure ensures the antenna is dust-tight and water-resistant, suitable for long-term field operations.
Technical Specifications:
Signal Received
• GPS: L1/L2
• GLONASS: L1/L2
• Galileo: E1/E5b
• BEIDOU: B1/B2
• QZSS: L1
• SBAS: L1
Nominal Impedance
• 50Ω
Polarization
• RHCP (Right-Hand Circular Polarization)
Axial Ratio
• ≤1.5 dB
Azimuth Coverage
• 360°
Working Frequency
• 1197-1278 MHz
• 1559-1606 MHz
LNA Feature
• LNA Gain: 35 ± 3 dB (Typ. @ 25°C)
• Noise Figure: ≤ 1.5 dB (@ 25°C, Typ.)
• Output/Input VSWR: ≤ 1.8:1 typ., 2.0:1 max
• Operation Voltage: 3.0 ~ 16 VDC
• Operation Current: < 45 mA
Mechanicals & Environmental
• Dimensions: 27.8 mm * 56 mm
• Weight: 18 g
• Connector: SMA-J
• Operating Temperature: -40°C to +85°C
• Storage Temperature: -40°C to +85°C
• Humidity: 95% non-condensing
Dimensions (mm):
