1. The Antenna Adopts A Single-Layer Multi-Feed Point Ultra-Wideband Design To Minimize The Phase Center Elevation Difference In The Entire Operating Frequency Band 2. The Antenna Unit Has High Gain, Small Gain Roll-Off, And Good Reception Of Satellite Signals At Low Elevation Angles, Ensuring That It Can Still Receive Satellites Normally In Some Situations With Severe Obstruction 3. The Low-Noise Amplifier Uses Pre-Filtering Technology To Effectively Suppress Out-Of-Band Interference Signals And Improve System Reliability 4. The Reactance Network Path Suppression Technology Effectively Reduces The Impact Of Multipath Signals On Measurement Accuracy 5. The Waterproof And Uv-Proof Outer Cover Provides Protection For The Antenna To Work In For A Long Time. Name:Full-Band High-Precision External Antenna Product Usage:It Is An External Full-Band Gnss Measurement Antenna That Supports Satellite Navigation Signal Reception Of Beidou Ii, GPS, And Glonass Systems, Meeting The Current Needs For Multi-System Compatibility And High-Precision Measurement, And Can Be Widely Used In Geodetic Surveying. Marine Surveying, Precision Agriculture, Deformation Monitoring And Other High-Precision Navigation And Positioning Occasions. Gain:40 Standing Wave Ratio:less than equal 2DB Frequency Range:1575.42Mhz Working Voltage:3.0-16V Output Impedance:50ohm Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:White Material:ABS Package Contents: 1 * Mapping Navigation Antenna 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.