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ARKNAV GPS Tracking System

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MAR-4 GPS and GSM Dual Marine Antenna

For GPS tracking systems, M2M solutions and telemetry applications


A GPS device is only as good as the antenna it uses. A bad quality antenna might compromise the whole GPS tracking or navigation system, and compared to the effort and cost you might spend uninstalling and repairing the system - buying a good quality GPS antenna is really a no-brainer!

MAR-4 is a low profile combine antenna for telemetry, fleet management, GPS tracking and M2M applications. Its GPS antenna has unique 10 watt RF protection, 3 signal noise filters and 2-stage LNA (Low Noise Amplifier) design, which provides the most accurate signal to GPS devices. MAR-4 offers ultimate performance for marine and fleet applications. It is designed for maximum ruggedness in marine environments.

So, save your company reputation and choose the right antenna. We’ve been in the business for many years, and the low failure rate of our antennas has been proven by our regular customers all over the world. All our antennas are made and tested in our own factory in Taiwan to very strict quality control standards. You are welcome to send your inquiries to us, and we are more than happy to offer a free testing sample to prove our antenna’s performance and quality.


  • 1. Water resistant & sunlight proof
  • 2. Screw mount
  • 3. 10 watt RF protection design
  • 4. Wide power supply range and short-circuit protection
  • 5. 3 signal noise filters and 2-stage LNA
  • 6. Silver-coated conducting pin
  • 7. Double-shielding cable
  • 8. RoHS compliant


RF protection (10 watt)
2 Stages active LNA (Low Noise Ampfiler)
Dual Filters, (HPF & LPF (Lump element))
Dielectric Patch antenna
Low Noise Low drop-out, Linear Regulator
GPS receiver short circuit protect
Low Loss RG/174 Coax cable
Aluminum Base/ PC+ Radome Plastic
Mechanical & Environmental
Dimensions 79 x 58 x 13 mm (CHECK THIS !!)
Mount 13mm treaded (1/2inch)
Color White
Operating Temperature -40 to +85° C
Humidity 40% to 95% RH
Storage Environment -40 to +85° C
40% to 95% RH
Output Terminal
Coax Cable RG-174U double shielded 5m, Low Loss 0.7dB/m
Coax Connector BNC SMB Fakra SMA MCX MMCX GT5 or on request
Center Frequency 1575.42±1.023 MHz
Bandwidth 10 MHz @ -3dB point
Polarization R.H.C.P
Axial Ratio 2.0 dB max
Over-Current Thermal Over-current shutdown >+150° C
RF noise protection RF protection(10watt), nano-second Spark-Gap
Center Frequency 1575.42±1.023 MHz
Over-all Gain 28dB (typical including 4dB cable loss & Filters)
Over-all NF <1.8dB @fo, 2dB max.
Output V.S.W.R 1.5 dB max
LNA Characteristic K=>1 Un-conditionally Stable
Voltage +3 Vdc to + 6 Vdc input, Auto Switching
Current 11~13mA±2
Frequency GSM: 900~1800 MHZ
Polarization R.H.C.P
Gain 3dBi
Power handling capacity 40 W


File Name File Size Time
MAR-4 GPS and GSM Dual Marine Antenna ARKNAV-Datasheet 455 KB Feb 8th 2009

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