GPS/GNSS Optical Repeaters
Global Foxcom’s GPS/GNSS Optical Repeater retransmits GNSS signals indoors or underground for large buildings, aircraft hangars, tunnels, data centers, military bunkers, and other facilities where direct satellite signal access is limited. The system uses an active outdoor antenna to receive the signal, an outdoor-rated transmit unit, a compact indoor repeater unit with adjustable RF gain, and indoor ceiling-mounted antennas to deliver controlled GPS/GNSS coverage inside the facility.
Features & Benefits
- Covers the 1164–1610 MHz GNSS frequency range
- Supports GPS L1/L2/L5, GLONASS L1/L2/L5, and Galileo E1/E5/E6
- 50 dB system gain for indoor signal retransmission
- Low noise figure below 2 dB from RSU to ASU
- Supports one or two indoor antennas
- Typical indoor coverage of 10 m x 10 m per antenna at 4 m ceiling height
- Designed for longer indoor cable runs above 40 m
- Outdoor unit operating range from -32°C to +49°C
- Outdoor storage ranges from -32°C to +71°C
- 95% humidity tolerance at 35°C, non-condensing
- 12 VDC / 0.5 A operating voltage and current consumption
- SMA and TNC female RF connector support
- Outdoor unit dimensions: 370 x 150 x 700 mm
- Optional high-power 4 mW laser transmitter available
- Single, dual, and quad indoor receiver output options available
The GPS/GNSS Optical Repeater is designed for installations where GNSS signals must travel farther than practical coaxial cable runs. By moving the long-distance link onto fiber, the system enables infrastructure teams more freedom to position outdoor antennas where reception is strongest while keeping indoor coverage points where testing, timing, or positioning access is required.
For aircraft hangars and other large facilities, the system is configured with omni or directional RHCP antennas to match the coverage pattern to the operating area. Global Foxcom’s modular architecture provides system integrators with a choice of outdoor optical transmitter options and indoor receiver configurations for single, dual, or quad output zones, matching the repeater design to facility size and coverage requirements without overloading the system.
Basic Details
| RF Specification | Value |
| Frequency Range – Bandwidth | 1164-1610 MHz |
| Noise Figure | less than 2dB |
| Gain | 48dB variable |
| Outdoor recommended cable loss | less than 10dB |
| Indoor recommended cable loss | less than 5dB |
When is a GPS/GNSS optical repeater used instead of a coaxial repeater?
An optical repeater system is deployed when the distance between the outdoor reception antenna and the indoor coverage area exceeds 40 meters. Fiber optics preserve signal integrity, offer complete lightning isolation, and simplify complex routing through large facility infrastructure.
Does the system support global navigation satellite systems beyond GPS?
Yes. Depending on the antenna configuration selected, Global Foxcom’s modular architecture fully supports GPS, GLONASS, Galileo, and BeiDou constellations.
How much physical space does each indoor antenna cover?
Under typical operating conditions with a standard 4-meter ceiling height, a single passive indoor antenna delivers a controlled coverage footprint of approximately 10 m x 10 m.
Which antenna options are available for the system?
The system works with active outdoor receive antennas and passive indoor antenna options, including omni and hangar-optimized directional RHCP antennas, depending on the required GNSS bands and coverage layout.
What type of optical connection interface does the system use?
Both the outdoor transmitter (ODU) and indoor receiver (IDU) units are equipped with standard FC/APC optical connectors to ensure low return loss and maximum stability across the fiber optic link.