Top quality GNSS antennas for optimal positioning performanceAn important factor in ensuring best positioning performance of your GNSS receiver is the right GNSS antenna. These antennas have been carefully selected and verified to work together with GPS receivers under challenging conditions to deliver accurate positions. Q:Should you use GPS with GLONASS?A:Actually only gps should do its job in case satellite reception is perfect.The combination with another system will improve accuracy when the signal gets weaker.Q:Does GPS work without an antenna?A:GPS (Global Positioning System) systems work by receiving signals from satellites.That isn't possible without an antennaQ:Where to put a GPS antenna?A:In most cases, you can mount the GPS antenna near the top of the underside of your dash (behind or above the receiver). DIMENSIONS&SPECIFICATIONS Item Specifications Antenna Frequency GPS L1/L5GLONASS G1/G2/G3COMPASS B1/B2Galileo E1/L1/E2/E5a/E5b Polarization RHCP Axial Ratio(min) 3dB V.S.W.R 2.0 Peak Gain 2dBi Impedance 50 Horizontal coverage angle 360 ° LNA Gain 28±2dB Noise Figure 1.5dB Passband fluctuation ±1.5dB Supply Voltage 3~ 12V DC Current Consumption 50mA V.S.W.R 2.0 Mechanical Connector SMA or others Cable RG74 or others Mounting Method Embedded Environmental Operating Temperature -40~+85 Relative Humidity Up to 95% Vibration 10 to 55Hz with 1.5mm amplitude 2hours Environmentally Friendly ROHS Compliant