GPS over Fibre
A GPS-over-fibre link extends the antenna feeder cable well beyond the maximum distance supported by coaxial cable-based systems.
It extends the distance between the GPS antenna and the GPS repeater/receiver to reach places where GPS signals are otherwise unavailable, or where installation of coaxial cable is impractical.
A GPS receiving antenna is placed outside the building, preferably at roof level, where it has a clear view of the sky to ensure it can “see” as many satellites as possible.
A coaxial cable runs from the antenna to a location just inside the building, and terminates on an optical transmitter (TX) module.
The transmitter module converts the RF signals into light by modulating a laser light source; the modulated light is then transported through an optical fibre to the optical receiver (RX) module.
The RX module converts the light signal back into its original RF form, then amplifies and impedance matches it to the attached GPS receiver/repeater.
Benefits of using optical fibre systems:
- Uses existing fibre infrastructure where available – multi-mode and single-mode fibre options available.
- Increased range when compared to coaxial cable systems – up to 1,500 metres on multi-mode fibre, and 10Km over single-mode fibre.
- Optical fibre is a non-conducting dielectric glass media, and is immune to strong electromagnetic fields – signals suffer minimal degradation.
- Optical fibres can be routed safely through explosive or flammable atmospheres, for example, in the petrochemical industries or munitions sites, without risk of ignition.
- With the appropriate conversion devices, optical fibres can carry a huge range of RF signals with much less energy than copper cable and with significantly higher bandwidth.
For more detailed information please see our Fibre Optic Products page.