1. -30 is a multi-star multi-frequency GNSS measurement antenna that supports the reception of L1/L2 band satellite navigation signals of Beidou II, GPS and GLONASS. 2. It can be widely used in high-precision navigation and positioning occasions such as geodetic surveying and mapping, marine surveying, precision agriculture, deformation monitoring, etc. The bottom of the product is equipped with 3 magnets and a standard 5/8-11 large nut for easy installation. 3. The multi-feed point design ensures the right-hand circular polarization and phase center performance, and reduces the impact of measurement errors. 4. antenna structure design improves the low-elevation multipath suppression performance and the maximum gain of the antenna. 5. The low-noise amplifier adopts pre-filtering technology to effectively suppress out-of-band interference signals and improve the reliability of the system. The shell is IP67 protected, which provides a for the long-term field operation of the antenna. Patch Architecture:Dual Four-point-feed, Signal-layer Patch Supported positioning signal bands: GPS:L1/L2/L5 BDS:B1/B2/B3 GLONASS:G1/G2/G3 :El/E5a/E5b/E6 L-Band Gain: equal 5.0dBi@Fc Polarization:RHCP Axial Ratio@zenith:less than equal 1.5dB Azimuth Coverage:360 Impedance:50 ohm Phase-center accuracy:less than equal 2.0mm Phase-center repeatability:less than equal 1.0mm LNA Frequency Range:1164MHz-1300MHz/1525MHz-1621MHz LNA Gain:402.0dB (Typ. @25) Group Delay variation:less than equal 5ns Noise Figure:less than equal 2.0 dB@25, Typ.(Pre-filtered) Output VSWR:less than equal 1.8:1 typ. 2.0:1max Operation Voltage:3.0-16.0V DC Operation Current:about 45mA Mechanicals & Environmental Connector:TNC (Female) Operating Temp:-40-+85 Storage Temp:-45-+85 Humidity:95% No-condensing Waterproof:IP67 Due to different batches, there may be differences in product appearance and printed text, which not affect use. Colour:White Material:PC+PBT Package Contents: 1 * GNSS measurement antenna 1 * 5m TNC Adaptor Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.