and high quality. Made of high-quality materials, durable. Full-frequency high-precision external antenna. The external all-band GNSS measurement antenna supports the satellite navigation signal reception of Beidou, GPS and GLONASS systems, meets the current requirements of multi-system compatibility and high-precision measurement, and can be widely used in geodesy, oceanographic measurement and precision agriculture, deformation monitoring and other high-precision navigation and positioning occasions. The antenna adopts a single-layer multi-feed point ultra-wideband design to minimize the phase center elevation difference of the entire working frequency band. The antenna unit has high gain and small gain rolling, which has a good reception effect on low-altitude satellite signals and ensures that satellites can still be received normally in some severely blocked situations. Low-noise amplifiers use pre-filtration technology to effectively suppress out-of-band interference with Nals and improve the reliability of the system. Passive network path suppression technology effectively reduces the impact of multi-path signals on measurement accuracy. The waterproof and ultraviolet cover protects the antenna from working on the field for a long time. Support satellite signals:BDS: BI, B2. B3: GPS: L1, L2, L5: GLONASS: Gl, G2. G3: Galileo: El, E2, F5a. ESh. F6, L-band Working frequency band:154MHz-1300MHz: 1551MHz-1615MHz Impedance matching:50 ohms Polarization method:right-hand circular polarization Antenna shaft ratio:less than equal 3dB Horizontal coverage angle:360° Xiangcentric error:less than equal 2.0mm Low-noise amplifier gain:40±2dB Noise number:less than equal 2.0dB Output standing wave ratio:Less than 2.0:1 In-band flatness:±2dB Operating voltage:3.0-16V DC Operating current:35mA Operating temperature:-40℃ - +80℃ Storage temperature:45℃ - +85℃ Humidity:95% non-condensation Level of protection:IP67 Output interface:TNC Colour:White Material:Plastic Si