Increase your signal with this waterproof GPS external antenna with built in low noise amplifier (LNA). This GPS antenna provides 28 dB of gain with its built in LNA. The industry standard SMA connector will work with most GPS systems and the magnetic base allows you to conveniently attach it to to the roof of your car.<br> <b>Technical Specs</b> <br> <b>1. Dielectric Antenna</b> <br> Center Frequency: 1575.42MHz ±3MHz <br> V.S.W.R: 2:01<br> Bandwidth: ±5 MHz<br> Impedance: 50<br> Peak Gain: > 3dBic based on 7x7cm ground plane<br> Gain Coverage: > -4dBic at -90 < 0 < 90 (over 75 volume)<br> Polarization: RHCP <br> <b>2. LNA/Filter</b><br> LNA Gain Without cable: 28dB Typical<br> Noise Figure: 2.0dB<br> Filter Out Band Attenuation: (f0=1575.42MHz)<br> 7dB Min f0+/-20MHz;<br> 20dB Min f0+/-50MHz;<br> 30dB Min f0+/-100MHz<br> V.S.W.R: < 2.0<br> DC Voltage: 3V to 5V<br> DC current: 7-10MA<br> <b>3. Overall</b> <br> Frequency Range: 1575/1609MHz <br> V.S.W.R: 2.0 <br> Gain: 30±3dBic <br> Impedance: 50? <br> <b>3. Mechanical</b><br> Weight: 60 gram<br> Size: 45x38x15mm<br> Cable: RG174<br> Length: 3m<br> Connector: SMA<br> Mounting: Magnet base<br> Housing: Black<br> <b>4. Environmental</b><br> Working Temp: -40 to 85℃<br> Waterproof test: 4 hours under the tap, let the water rush over the housing;<br> Vibration: Sine sweep 1g (0-p) 10 ~ 50 ~ 10Hz each axis<br> Humidity: 95% ~ 100% R<br>