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ARKNAV GPS Tracking System

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A-131 GPS Antennas


A-131 GPS Antennas is a performance GPS antenna with power and RF signal protection built-in to protect the active Low Noise Amplifier (LNA) and the host GPS receiver at the connector end from danger of shorting, (GPS receiver front-ends can be destroyed or de-graded by external antennas over-loading or shorting). The RF signal protection shield on the bottom cuts out noise and provides a more accurate signal. A-131 GPS Antennas is designed for multi-purpose integration applications such as GPS tracking products etc. The antenna is designed for standard power input voltages ranging from 3V~6V with reverse polarity shutdown, over-current sense shutdown and EMC power line suppression. And, like all the other ARKNAV antennas, A-131 GPS Antennas is made with high quality double-shielding cable and silver coated conducting pin, and meets RoHS directives.


A-131 GPS Active Antennas is the only innovating design antenna with performance, quality and a Power protection circuit built-in to protect the active LNA’s, and most importantly the host GPS receiver down the connector end from the danger of a SHORT circuit external antenna (Note: GPS receiver front-end can be destroyed or de-graded by an external GPS antenna in an over-load or short conditions. The A-131 is a low profile GPS active antennas system for the next generation multi-purpose GPS mobile antenna products for Telematics, Fleet Management, Navigations and AVL applications. This small print size of the antenna design does not reflect over-all performance, since the antenna itself needs no ground plane aid to deliver the L1 band small signal carrier that originates from the 24 orbiting USA satellites located thousands of miles over-head and with the ground reception power sensitivity at over -130dB. The A-131 GPS Active Antennas is also design as a standard power input voltages in range from +3Vdc to +6Vdc with reverse polarity shutdown, over-current sense shutdown and an EMC power line suppression. The most important over-all design concept of the A-131 GPS Active Antennas is the complete protections of the host sensitive GPS receiver made from any manufacturer that it serve and can also be destroy or de-grade using an improper design antenna.


2 Stages active LNA
Dual Filters, (HPF & LPF(lump element))
+28dB gain
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
Receiving Frequency L1 Band(1575MHz)
Output Impedance 50 ohms
Polarization’s Right Hand Circular (RHC)
Bandwidth 10dB Mhz @ -3dB point
VSWR 1.5 Typical @ 1575MHz
Elev. Angle Coverage 5~90 degree
Az. Bearing Coverage 360 degree
Filtering Dual(BPF <10 Mhz B/W, LPF @1576 MHz Stop-band @ 1585MHz)
Over-all Gain 28dB (typical including 4dB cable loss & Filters)
Over-all NF <1.8dB @fo, 2dB max.
LNA Characteristic K=>1 Un-conditionally Stable
RF Insertions loss K=>0.1dB, leakage power 100mW /1 watt input
Power Consumption 11mA to 13mA (max)
Power Input Sensor Reverse Polarity Short Circuit shutdown
Over-Current Sensor Thermal Over-current shutdown >+150degreeC
Power Input +3Vdc to + 6Vdc input, Auto Switching
Dimensions 31 x 24.5 x 7mm +/-0.5mm
Mount Magnetic
Radome Color No
Coax Connector BNC, SMA, SMB, MCX, MMCX, GT-5
Coax Cable RG-174U double shielded 5m, Low Loss 0.7dB/m
Operating Temperature -30 to + 85 degree C
Storage -40 to + 90 degree C
1. Open Frame Antenna , with RF shield
2. Open Frame with 3” Flanges & RF shield
3. Ant + Aluminum Base


File Name File Size Time
A-131 GPS Antennas ARKNAV-Datasheet 826 KB Sep 18th 2009

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