GNSS high-precision antennas are a type of antenna with special requirements for the stability of the antenna phase center. They are usually used in conjunction with high-precision boards to achieve centimeterlevel or even millimeter level high-precision positioning. The following is a detailed introduction to them:
Key Technical Indicators
Phase Center Stability：The phase center is the point from which the antenna appears to radiate or receive signals. High-precision antennas require extremely stable phase centers to ensure positioning accuracy, with phase center variation typically within sub-centimeter or even millimeter levels.
Multi-Path Rejection Ability：Multi-path signals can interfere with the normal reception of satellite signals and affect positioning accuracy. High-precision antennas use technologies such as choke rings or special radiation patterns to effectively suppress multi path signals.
Antenna Beamwidth and Low-Elevation Gain：A wide beamwidth helps the antenna receive signals from more satellites, and high gain at low elevation angles is crucial for tracking satellites near the horizon, ensuring stable signal reception in various environments.
Frequency Band Coverage：To receive signals from multiple satellite constellations, high- precision antennas usually support multi-system and multi-frequency bands, covering GPS, GLONASS, Galileo, BeiDou, and other constellations' main frequency bands.
Applications
Surveying and Mapping：Used in engineering layout, topographic mapping, and various control surveys to achieve static millimeter-level positioning accuracy.
Continuous Operation Reference Stations (CORS)：Through long-term observation, it obtains accurate position information and provides error correction parameters for users through the ground-based enhancement system to help users obtain accurate coordinate information.
Deformation Monitoring and Earthquake Monitoring：By accurately monitoring deformation, it detects tiny deformations to predict natural disasters.
Unmanned Aerial Vehicles (UAVs)：It ensures the accuracy, efficiency, and safety of UAV operations in scenarios such as agricultural plant protection, surveying and mapping, and power line inspection.
Autonomous Driving：Combined with RTK and inertial navigation, it realizes high-precision positioning in most environments to ensure the safe operation of vehicles.
