Active GPS Antenna

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ClockWatch Star Sync GPS
External Antenna

Available from Beagle Software is the Gilsson  active antenna. This  antenna averages about 28 dB signal gain.  This remote patch antenna greatly amplifies GPS signal reception.
  • Amplified (active) GPS antenna for exceptional GPS signal reception.
  • Built-in magnets for mounting on car rooftops or other metallic surfaces (user-removable)
  • Built-in permanent mounting holes for mounting on building or vehicle surfaces.
Active external GPS antenna with MCX connection

Antenna Specifications


  • Case: Black Polycarbonate Radome with die-cast base
  • Dimensions: 2.3 in. (L) x 1.9 in. (W) x 0.6 in. (H)
  • Mounting (included): Two user-removable magnets;
    two M3 screws for holes on base
  • Other Mounting Options: Suction cup mount for surface mounting
  • Power Gain: 28 dB
  • Operating Voltage: 2.5V~12V DC Power
  • Power Consumption: 12mA +/- 1mA
  • Operating Temperature: -40 to +185 degrees F
  • Noise: 2.0 max.
  • Impedance: 50 ohm
  • Frequency: 1575.42 MHz
  • Cable: RG174/U (in 3, 9, or 16 ft lengths)
  • 100% waterproof
Star Sync External Active Antenna
with 8 foot cable.
Using other External Antennas with the Star Sync Receiver Other active antennas may be used with the External receiver if it conforms with the following requirements.

Gain: Antenna should provide between 10 dB to 30 dB net gain between the antenna feed point and the connection to the Star Sync receiver. Consider all amplifier gains;. filter losses, cable losses, etc. when calculating the gain.

Connection: MCX male connection. An antenna with a different type of connector can also be used.

Antennas with BNC, N, SMA connectors

Other types of antennas can also be used if:

  • a suitable adapter is used to connect to the MCX jack
  • the active electrical nature of the connection is observed

Other antennas terminated in a BNC, N or SMA connector may also be used if a  MCX  Adapter is used (available from Beagle Software). Place the MCX adapter between the connector on the end of the antenna cable and the connector on the Star Sync receiver.

The total noise on the external antenna must be <= 7dB with a gain between 10 dB and 40 dB. Properly bias the antenna from receiver source or an external source. The Star Sync receiver supplies 3.0 VDC to the center conductor of the MCX female relative to the connector shell ground. The source resistance of the DC supply to the center of the conductor is approximately 10 ohms, which is included as a current limiting resistance. This resistance allows the receiver to survive momentary shorting of the antenna port. There is no provision to protect against a continuously shorted antenna port.

If bias voltage is supplied from an external source than the supply must be 4.0 to 8.0 VDC bias through the series combination of an on-board ~10 ohm current limiting resistance and a Schottky diode.

In either case the antenna must not draw more than 60mA.


For more information

Star Sync Product Information:
  Advanced Features
  Star Sync GPS Receiver
    Installation Information - Installation Video
    Antenna Mounting Options
  Frequently Asked Questions about GPS

Star Sync Main Page
Star Sync Site Index



Contact Beagle Software for additional antenna and installation information.

For more information on Star Sync, please complete the information request form.  Or call us toll-free at 1-877-845-2549.


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Copyright 2007 Beagle Software. All rights reserved
Last reviewed March 19, 2008