GL225 high-precision GNSS antenna, in production since 2020
A 38 dB LNA GNSS antenna with two SAW filters in front and a noise figure below 1.5. TNC or N straight connector on the same SKU. The customer deploys it next to cellular radios on construction sites and survey rovers.
38 dB gain and a noise figure under 1.5, with two SAW stages
The customer integrates GNSS receivers for survey rovers, machine-control systems on construction equipment, and fixed reference stations. The receivers are placed in environments that are loud at RF — cellular base stations, WiFi access points, heavy machinery with brushless motors and variable-frequency drives.
A generic GNSS antenna loses satellites in those conditions. The GL225 was tuned for this kind of site. Two SAW filters before the LNA clean up out-of-band interference. The LNA has 38 dB gain and a noise figure below 1.5 so the sky view is not eaten by the front-end.
Hold a fix next to a cellular radio
On a construction site or a survey rover, the GNSS antenna is rarely the only antenna on the platform. Cellular modems, private LTE radios, and WiFi access points sit within a metre or two of the GNSS receiver. Without front-end filtering, those signals push the LNA into compression and the receiver loses sky view. The fix becomes unreliable, and an unreliable fix is not useful for centimetre-grade work.
Adding filters after a low-cost LNA does not recover the lost sky view. The filtering has to come before the LNA, and the LNA itself has to be quiet enough that the noise floor of the receiver is set by the antenna, not by the front-end.
- Front-end filtering before the LNA, not after
- Noise figure low enough that the receiver sees the sky, not the antenna chain
- TNC or N straight connector on the same SKU — partner ships both variants
- Volume deployments: survey rovers, machine control, fixed reference stations
Two SAW stages before the LNA, NF under 1.5 after
The GL225 puts two SAW stages in series before the LNA. Each SAW cleans up out-of-band energy before it reaches the next stage. The LNA that follows has 38 dB of gain with a noise figure below 1.5, so the system noise floor is set by the antenna, not by the chain.
The connector is a choice, not a separate SKU. Same housing, same BOM, TNC or N straight connector at the end of the line. The partner can run the same part number on different platforms without re-qualifying.
- Two SAW filters, front-end, before the LNA
- LNA: 38 dB gain, NF < 1.5
- Connector: TNC or N straight, on the same SKU
- Same housing across both connector variants, no re-qualification for the partner
Stable fix in noisy RF, on the same SKU
Specifications
| Model | GL225 |
|---|---|
| Type | High-precision GNSS antenna |
| LNA gain | 38 dB |
| Noise figure | < 1.5 |
| Filtering | 2 × SAW, front-end |
| Connector | TNC or N straight, same SKU |
| Typical use | Survey rovers, machine control, fixed reference stations |
| Program start | 2020 |
| Status | Active, volume deployments |
The dual SAW stage is what lets us deploy next to cellular radios without losing sky. The NF margin gives us a consistent fix on dense industrial sites.— GNSS program lead, Spanish systems integrator
