Product Overview and Engineering Role
The SimtoLink GNSS multi-band active ceramic antenna packs a ceramic radiator and an active front end, such as an LNA, into a module that can be soldered down or mounted on a bracket. It is for vehicle terminals, survey gear, and timing edge nodes, so a multi-band GNSS RF path can be stood up quickly.
Band, gain, VSWR, and impedance in the table line the antenna up with the receiver RF port, the cable, and the lightning plan. On an active model, check supply, noise figure, and out-of-band rejection. The Hardware Specification governs.
Reliability and Site Conditions
A metal body, a nearby cellular or Wi-Fi transmitter, or a poor ground will lift the noise floor and hurt accuracy and time to first fix. Keep the cable shield continuous and the ground sound. Use a filtered supply and a proper lightning path when the site needs them.
Wide outdoor temperature and UV stress the adhesive and the seals. SimtoLink recommends rechecking C/N₀ and accuracy on the vehicle, or on the surface where it will sit, and routing the cable to the local radio and lightning rules.
Key Hardware Parameters
The table is the typical RF and electrical set for this antenna, for selection and for bid clauses. Extra bands such as L2/L5, another package, or a lightning assembly are available from SimtoLink with the Hardware Specification and the Installation and Commissioning Guide. Order codes in the family can differ; the nameplate and the documents shipped with the antenna govern.
| Parameter | Specification | Notes |
|---|---|---|
| Band | 1559～1610 MHz and others | GPS L1, BDS B1, and others, by order |
| Gain | Active-chain dB from the specification | Includes the LNA; not a bare dBi figure |
| VSWR | <2.0 | Typical output port |
| Polarization | Right-hand circular (typical) | Specification governs |
| Impedance | 50 Ω | To the receiver RF port |
| Power | 2.7～5.5 V / typical <25 mA | Active models |
| Noise | NF from the specification | Affects weak-signal acquisition |
| Cable | Short cables such as RG174 | Keep them short to cut loss |
| Operating temperature | -40～85 ℃ | Automotive grade is typical; confirm at order |
| Mounting | Surface mount / bracket / window in the housing | Keep metal off the main lobe |
Typical Deployments
Four layouts that come up when you size an antenna and look at payback:
Vehicles and fleets
Paired with a factory-fit or aftermarket terminal and a T-Box, so the fix holds up in urban canyons and under cover.
Survey and rover stations
An external active head shortens acquisition and time to a fixed solution, so a field crew can set up quickly.
Power distribution and timing
The antenna side of GNSS disciplining or time sync at a substation or a private-network small cell.
Farm machines and unmanned platforms
A compact multi-band antenna for farm guidance and for unmanned vehicles and boats.
Installation, Grounding, and Maintenance
- On an active model, check supply voltage, current, and ESD rating. A long bias lead can sag the voltage or drive the LNA into saturation.
- Keep the cable short, crimp the connectors properly, and keep the shield and the housing ground continuous.
- Match the receiver port at 50 Ω. Extra adapters, especially poor ones, add loss and VSWR.
- Stay clear of high-power transmit antennas and inverter busbars. Add distance or absorber if you cannot.
- Where lightning is common, fit antenna-plane protection and a ground collector to the local code, and inspect waterproofing and connector oxidation on a schedule.
Ordering, Documentation, and Support
SimtoLink supplies the hardware specification, dimension drawings, a wiring table, and a sample project for this antenna. Volume orders can include a sample review and a factory inspection. Warranty and calibration follow the contract and the documents shipped with the unit.