1.565GHz Quadrifilar Helix Beidou Antenna

Quadrifilar Helix Antenna 1.565GHz for Beidou Satellite Navigation

This product is a professional Helical Antenna in the form of a quadrifilar helix design. The antenna operates at 1.565GHz, which is the primary frequency for Beidou satellite navigation systems, and is built from aluminum for good durability. As a Quadrifilar Helix Antenna, it provides right hand circular polarization which perfectly matches satellite downlink signals. The beam pattern offers hemispherical coverage with wide beamwidth, maintaining signal reception even when the antenna is installed at an angle. The antenna comes in a compact cylindrical form factor with dimensions of φ163*109mm excluding connector and bracket. It can be mounted internally or externally depending on the application requirements. The antenna features an SMA K type connector for easy integration with receivers.

This quadrifilar helix antenna delivers excellent electrical performance at its dedicated frequency of 1.565GHz. The Voltage Standing Wave Ratio (VSWR) is rated at 1.3, which shows excellent impedance matching. The gain is 5dB or higher, providing good signal strength for satellite signal reception. The axial ratio is 2.5dB or better, ensuring very good circular polarization purity. The right hand circular polarization is specifically matched to Beidou and other GNSS satellite signals. The wide beam hemispherical pattern means the antenna can receive signals from satellites at various elevations without needing precise pointing. The construction resists high temperature, vibration, moisture, and water ingress, making it suitable for industrial and vehicle mounted installations.

One clear strength of this Quadrifilar Helix Antenna is its dedicated performance for satellite navigation. It is widely used for satellite signal reception and is a mainstream antenna solution in the Beidou field. The antenna is ideal for applications requiring reliable GNSS signal reception in challenging environments. The wide beamwidth allows the antenna to maintain lock on satellites even when the vehicle tilts or turns. The compact size makes it easy to integrate into various devices and vehicles. The robust construction withstands outdoor conditions including temperature extremes, rain, and vibration. The main limitation is narrow bandwidth, as this antenna is optimized specifically for the 1.565GHz satellite band. This makes it perfect for dedicated satellite navigation applications but not suitable for ultra wideband electronic warfare or broadband communication.

In practical use, this Quadrifilar Helix Antenna handles satellite navigation reception tasks very well. For Beidou positioning systems, it provides reliable signal reception for accurate position determination. The right hand circular polarization matches the satellite signals exactly, maximizing received signal strength. For vehicle mounted installations, the antenna withstands vibration from rough roads and temperature extremes from hot sun to freezing cold. The weather resistant construction handles rain, snow, and humidity without performance degradation. The wide beam hemispherical pattern means the antenna continues receiving signals even when driving through areas with obstructed sky view. The SMA K connector provides a precise, compact connection point. It stands as a solid example of how a well designed Quadrifilar Helix Antenna can meet the demanding needs of Beidou and other GNSS satellite navigation applications at 1.565GHz.