August 15th Multi-system multi-band high-precision circularly polarized antenna

　　"GPS high-precision solution" refers to a technology system that uses various technologies and methods to improve the positioning accuracy of the Global Positioning System (GPS) or other global navigation satellite systems (GNSS, such as China's Beidou, Russia's GLONASS, and Europe's Galileo) from the conventional meter level to the centimeter level or even the millimeter level. These solutions are widely used in fields requiring precise positioning. Figure (1) Several antennas cover GPS L1/L2/L5, BDS B1/B2/B3, GLONASS L1/L2, Galileo E1/E5a/E5b

　　Full-band high-precision antennas meet the current needs of multi-system compatibility and high-precision measurement of GNSS measurement equipment and are widely used in geodetic mapping, marine measurement, geological deformation monitoring and other fields. This multi-band antenna solution can improve accuracy by enabling modules and applications to utilize the L band, where data services are located, to enhance GNSS signals to maximize accuracy to centimeter-level granularity. These L-band services, also known as Precise Point Positioning (PPP), offer a low-cost alternative to real-time kinematic (RTK) correction services, making them well-suited for applications requiring both accuracy and affordability. The ability to support L-band services is valuable for a growing number of maritime applications, such as autonomous vehicles moving containers through ports. (For more information, see "How to Leverage the L-Band to Balance Accuracy and Affordability for GNSS Applications" and "High-Precision GNSS and RTK Positioning.")

　　1. Using ceramic or helical antenna designs to mitigate multipath and electromagnetic interference, and integrating data transmission modules (such as LoRa and LTE), this solution enables high-speed communication between base and rover stations, suitable for drones.

　　2. No local reference station is required. Users utilize raw observation data (pseudoranges and carrier phase) received by a single receiver, combined with precise satellite orbits and clock corrections (typically obtained via satellite links) accurately calculated and broadcast by a global or regional reference station network, and an accurate atmospheric delay model, to achieve high-precision absolute positioning directly at the receiver for applications such as ships.

　　3. This solution's antenna is also designed for high-precision vehicle positioning required for autonomous driving and intelligent transportation. Compatible with next-generation 5G NR or 4G LTE cellular networks, it provides precise positioning and lane-level navigation for all vehicles.