Product overview
The ComNav AT600 is a choke ring antenna from ComNav Technology Ltd. For GNSS reference-station use, with full-constellation compatibility. It was selected together with M300 Pro GNSS receivers for a Dominican Republic network developed with the nonprofit institution FUNDCORSRD. The project comprised 32 continuously operating reference stations equipped with the SinoGNSS CORS Solution, supporting topographic surveying and the adoption of RTK positioning with NTRIP corrections delivered over cellular connections.
In this configuration, the AT600 serves as the antenna paired with a GNSS receiver at a fixed reference station. The associated CORS solution supports applications including surveying, GIS, precision agriculture, machine guidance, forestry management and UAV navigation. These applications belong to the wider positioning system, while the AT600 provides the reference-station antenna component. Surveyors using CORS can work without carrying and setting up their own base station, simplifying field operations.
Specifications
| Specification | Value & conditions |
|---|---|
| Reference-station equipment | AT600 choke ring antennas with M300 Pro GNSS receiversSelected for the CORS reference stations described in the Dominican Republic project. |
| Constellation compatibility | Full-constellation compatibilityAs described for the AT600 in the project report. |
| BeiDou signals | B1, B2, B3 |
| BeiDou Global signals | B1C, B2a |
| GPS signals | L1, L2, L5 |
| GLONASS signals | L1, L2 |
| Galileo signals | E1, E2, E5a, E5b, E6 |
| Additional supported systems and bands | IRNSS, QZSS, SBAS and L-Band |
| Nominal impedance | 50Ω |
| Polarization | RHCP |
| Axial ratio | ≤ 2dB90° |
| LNA gain | ≥ 50dB |
| Noise figure | ≤ 1.8dB |
| Output VSWR | ≤ 2.0 |
| Operating voltage | 3.3 - 12VDC |
| Operating current | ≤ 60mA |
| Group delay | Less than 5ns |
| Passband ripple | ±1.5dB |
| Gain | 5dBiAt zenith |
| Phase center offset | ≤ 1.5mm |
| Dimensions | Φ379.5×296.5mm |
| Connector | TNC-K |
| Weight | Less than 8.5kg |
| Operating temperature | -40°C to +85°C |
| Storage temperature | -55°C to +85°C |
| Humidity | 95%Non-condensing |
| Water and dust protection | IP67 |
| Drop resistance | Survives a 1-meter drop |
| Calibration | IGS, NGS |
| Antenna structure | 3D choke ring structure with multipath rejection |
| Phase center error | Sub-millimeter level; high stability and repeatability |
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