From the navigation functions of smartphones to the precise driving of autonomous vehicles, and from precision agriculture to emergency rescue, the advancement in each field relies on the support of precise positioning technology. The Beidou antenna, as a bridge between the Beidou satellites and ground equipment, is the ultimate core of achieving precise positioning.

1. Classification

● By Polarization Type: Vertical polarization and circular polarization. Circular polarization is typically used for Beidou antennas due to its superior performance compared to vertical polarization.

● By Placement: Internal antennas and external antennas.

2. Structure

Most Beidou antennas are right-hand circularly polarized ceramic dielectric antennas, consisting of:

● Ceramic Antenna: The core technology of Beidou antennas.

● Low Noise Amplifier: The component that amplifies and filters signals.

● Cables

● Connectors

3. Technical Features

● Multi-frequency Reception: Modern Beidou antennas typically use multi-frequency reception technology to receive signals from multiple frequency bands simultaneously. This enhances positioning accuracy and reliability and maintains stable performance even in unstable signal conditions or interference.

● High Sensitivity: To function in weak signal environments, Beidou antennas need high sensitivity to capture very weak satellite signals and convert them into usable navigation data.

● Strong Interference Resistance: In complex electromagnetic environments, Beidou antennas must withstand various interference signals to ensure accurate and stable navigation information. Advanced interference resistance technologies and algorithms are often used.

● Miniaturization and Integration: With technological advancement, Beidou antennas are becoming more miniaturized and integrated, making them easier to embed in various portable devices and smart terminals, providing users with more convenient and efficient navigation services.

4. Technical Principles

● Antenna Design: Beidou antennas use a wide bandwidth, high-gain design for efficient reception of Beidou satellite signals. Optimized antenna structure and materials enhance interference resistance.

● Receiving Circuit: Beidou antennas incorporate low-noise amplifiers, filters, and other circuits to amplify, filter, and demodulate signals, extracting useful navigation information.

● Signal Processing: Beidou antennas use digital signal processing technology to decode, position, and time the received signals, providing accurate navigation and positioning services.

5. Differences Between Beidou and GPS Antennas

1. Frequency

Beidou system uses frequencies of 1561.098 MHz and 1589.742 MHz, while GPS system uses frequencies of 1575.42 MHz and 1227.60 MHz.

2. Signal Processing

The Beidou system uses CDMA technology, while GPS system uses TDMA technology.

3. Coverage

Beidou system mainly covers China and surrounding areas, while GPS system covers the entire globe.

6. Application Areas

1. [敏感词]: Navigation, positioning, and communication command. Beidou antennas allow the military to achieve precise positioning of personnel, equipment, and operational areas, enhancing operational effectiveness.

2. Civilian: Provides accurate navigation and positioning services for intelligent transportation systems, helping to alleviate traffic congestion and improve road safety.

3. Agriculture: Precision agriculture tasks to increase crop yield and quality.

4. Fishing: Used for fishing boat navigation and fishing ground positioning to improve fishing productivity.

5. Meteorology: Enhances the accuracy and timeliness of weather forecasts.

Conclusion

Beidou antennas, as a key component of the Beidou satellite navigation system, play an irreplaceable role in achieving precise positioning. They are not only a bridge connecting satellites and ground equipment but also an important force driving global navigation technology development. Beidou antennas will continue to leverage their unique advantages to provide more convenient, efficient, and precise navigation and positioning services.