Reference Station Antenna
PRECISE AN4
PRECISE AN4 is a 4-system full-band 3D choke antenna compatible with GPS, GLONASS, BDS, and GALILEO.
Designed to meet the demands of high-precision measurement equipment, it ensures seamless multi-system compatibility and exceptional accuracy.
The AN4 is ideal for a wide range of high-precision applications, including geodetic mapping, oceanographic surveying, waterway and dredging surveying,
seismic monitoring, bridge deformation monitoring, landslide monitoring, and terminal container operations.
Engineered for Precision
Trusted for Stability
Full-Band Signal Compatibility
Supports the complete frequency bands of four major GNSS systems and L-Band signals, ensuring seamless multisystem compatibility and interoperability to meet diverse application needs.
Sub-Millimeter Phase Center Stability
Features a unique three-dimensional choke structure and a four-feedpoint design to precisely align the phase center with the geometric center. This minimizes measurement errors and achieves sub-millimeter stability, making it ideal for high-precision applications such as reference stations, bridge deformation monitoring, and geological analysis.
Robust and Reliable Structure
Constructed with fiberglass composite materials and a multi-layer protection design, the antenna achieves an IP67 protection rating. It is highly resistant to dust, UV rays, and water, with a proven MTBF exceeding 30,000 hours, ensuring reliable operation in extreme environments including high/low temperatures, high humidity, and salt spray.
Superior Tracking in Complex Environments
With high gain and a wide beam width, the antenna ensures strong satellite signal reception even at low elevation angles. It performs reliably in obstructed environments, such as wooded areas or urban landscapes, maintaining a stable GNSS signal lock.
Exceptional Anti-Interference Performance
Equipped with a highly effective LNA and advanced out-of-band suppression, the antenna mitigates unwanted electromagnetic interference from sources like power grids, telecom base stations, and radio transmissions. This reduces the risk of system signal loss and ensures stable operation in challenging conditions.
Detail Specification
Antenna Performance
| Frequency range | GPS L1/L2/L5 BDS B1I/B2I/B3I/B1C/B2a/B2b GLONASS L1/L2/L3 GALILEO E1/E5a/E5b/E6 QZSS L1/L2/L5/L6 IRNSS L1/L5 L-Band |
| Impedance | 50 ohms |
| Polarisation mode | right-handed circular polarisation |
| Antennae axial ratio | ≤3dB |
| Horizontal plane coverage angle | 360° |
| Output VSW | ≤2.0 |
| Maximum Gain | 7dBi |
| Phase centre error | ±1mm |
Low Noise Amplifier Indicators
| Gain | 50±2dB |
| Coefficient of noise | ≤2dB |
| Output VSW | ≤2.0 |
| In-band spectrum ripple | ±2dB |
| Operating voltage | +3.3～+12VDC |
| Operating current | ≤60mA |
| Differential transmission delay | ≤5ns |
Physics
| Antenna Size | Φ379*312mm |
| Weight | Bare machine 9.3kg Packed 10.5kg |
| Connector type | TNC Negative |
| Installation | 5/8″*11 teeth (base with pointing north) |
Working Environment
| Working temperature | -40℃～+85℃ |
| Storage temperature | -55℃～+85℃ |
| Humidity | 95% No condensation |
GNSS Reference Receiver
PRECISE C
PRECISE C is a lightweight split GNSS receiver designed for the safety monitoring industry, featuring miniaturisation, low power consumption, low cost, high update rate, Gigabit network port, high satellite search quality, etc. Used with a small 3D choke antenna, it can be used as a reference and monitoring station in harsh monitoring scenarios, and is widely used in the fields of bridge monitoring, dams in reservoirs, and other precision structures monitoring.
Miniaturised Anti-Multipath Antenna
PRECISE AN2
This antenna is a full-band measurement antenna covering GPS L1/L2, GLONASS L1/L2, BDS B1/B2/B3, Galileo E5. It meets the needs of multi-system compatibility of measurement equipment and extremely high precision micro-deformation measurement. it is mainly used in some occasions where there is a very high requirement for measurement accuracy and the surrounding environment has a multipath influence, such as seismic prediction, high-precision differential reference stations and other demanding applications.
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