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GNSS/GPS inline amplifier

A GNSS inline amplifier extends cable length between the outdoor antenna and the indoor GPS repeater/receiver

GNSS/GPS inline amplifiers

An inline amplifier may be required when the antenna cable length attenuates the GPS signal to a level below the receiver’s recommended minimum input level.

The Starlink inline amplifiers from Forsberg Services are premium quality devices.  They are rugged and watertight, finished in gold-plated brass, and optimized for GPS applications.

Signal gain is 12dB or 21dB across the GNSS band, supporting GPS, GLONASS, Galileo, Beidou and SBAS.

All other RF frequencies are filtered and rejected to remove any unwanted signals that may otherwise enter the coaxial cable and cause electromagnetic interference (EMI).

Connectors can be same both ends or different; TNC, SMA, N-Type options.

No power supply needed; DC power is derived from the GPS repeater/receiving device via the coaxial cable.

TECHNICAL DETAILS

  • Length 96mm with TNC connectors; varies slightly depending on connector
  • Power consumption 8mA
  • Colour: Black/Gold
  • Input voltage range: 3V to 24V DC
  • DC current draw: <10mA
  • Constructed of gold-plated brass, rugged and watertight to IP67
  • Typical noise figure < 3dB
  • Operating temperature range -55C to + 70C


DESIGN CONSIDERATIONS

Use of an inline amplifier can significantly extend the distance between the outdoor antenna and the GPS receiver.

There are two main variables to consider:

  • Antenna gain, typically 25 to 40dB
  • Signal loss on the cable through attenuation – varies with cable type and signal frequency

The combination of these two factors determine the GPS signal strength entering the receiver.

Consult the repeater/receiver manual to ascertain the permissible input signal level range.

INSTALLATION

GNSS/GPS in-line amplifier connected directly to a GNSS antennaThe amplifiers are designed to be installed in-line with the antenna feeder cable.

The ideal place for an amplifier is at, or very near, the antenna location.

This is where the signal is strongest and is not affected by RF noise.

It can be attached directly to the antenna connector, as shown in the photograph.

Or it can be placed indoors where it is easily accessed from inside the building, using a short length of good quality coaxial cable to connect it to the antenna.

SUPPORT

FalTech GPS can advise on attenuation factors of a range of different cable types in order to calculate which amplifier is best for your situation.

We can supply complete systems including antenna, amplifier and appropriate pre-terminated cables to suit your application.

Request quote

Ordering informationOrdering options

Three steps to determine which amplifier to order:

  1. Choose required amplifier gain: 12dB or 21dB
  2. Select connectors
  3. Select the frequency band required

If you need help with specifying the exact solution for your requirement, we would be happy to advise.

Call 01326 336 444 or email FalTech GPS via the form at the top right of this page.

Lead time for this product is approximately 7-10 days – they are made to order.

Two frequency bands are covered and amplifier gain is either 12dB or 21dB.

LA12-1575-100 Series

Part code Description
LA12-1575-100-T GPS inline amplifier; L1; 12dB gain; TNC female both ends
LA12-1575-100-N GPS inline amplifier; L1; 12dB gain; N type female both ends
LA12-1575-100-S GPS inline amplifier; L1; 12dB gain; SMA female both ends
LA12-1575-100-TMF GPS inline amplifier; L1; 12dB gain; TNC male to TNC female
LA12-1575-100-TS GPS inline amplifier; L1; 12dB gain; TNC female to SMA female

LA21-1575-100 Series

Part code Description
LA21-1575-100-T GPS inline amplifier; L1; 21dB gain; TNC female both ends
LA21-1575-100-N GPS inline amplifier; L1; 21dB gain; N type female both ends
LA21-1575-100-S GPS inline amplifier; L1; 21dB gain; SMA female both ends
LA21-1575-100-TMF GPS inline amplifier; L1; 21dB gain; TNC male to TNC female
LA21-1575-100-TS GPS inline amplifier; L1; 21dB gain; TNC female to SMA female

LA12-L1L2 Series

Part code Description
LA12-L1L2-T GNSS inline amplifier; L1/L2; 12dB gain; TNC female both ends
LA12-L1L2-N GNSS inline amplifier; L1/L2; 12dB gain; N type female both ends
LA12-L1L2-S GNSS inline amplifier; L1/L2; 12dB gain; SMA female both ends
LA12-L1L2-TMF GNSS inline amplifier; L1/L2; 12dB gain; TNC male to TNC female
LA12-L1L2-TS GNSS inline amplifier; L1/L2; 12dB gain; TNC female to SMA female

LA21-L1L2 Series

Part code Description
LA21-L1L2-T GNSS inline amplifier; L1/L2; 21dB gain; TNC female both ends
LA21-L1L2-N GNSS inline amplifier; L1/L2; 21dB gain; N type female both ends
LA21-L1L2-S GNSS inline amplifier; L1/L2; 21dB gain; SMA female both ends
LA21-L1L2-TMF GNSS inline amplifier; L1/L2; 21dB gain; TNC male to TNC female
LA21-L1L2-TS GNSS inline amplifier; L1/L2; 21dB gain; TNC female to SMA female