Active GPS antennas and passive antennas are two common types of antennas found in GPS receivers, each with significant differences in functionality and structure.

In the development of GPS technology, GPS antennas play a crucial role as components for receiving satellite signals. Active GPS antennas and passive GPS antennas are two common types with notable differences in structure and operation.

1. Passive GPS Antennas:

Passive GPS antennas refer to antennas that do not require external power supply when receiving satellite signals. They mainly consist of antenna elements and an antenna amplifier used to receive and amplify weak signals from satellites. Passive GPS antennas typically have small form factors and low power consumption, suitable for applications where antenna performance requirements are not stringent.

2. Active GPS Antennas:

Active GPS antennas, on the other hand, require an external power supply to provide the necessary power for the antenna amplifier. Active GPS antennas integrate amplifiers within the antenna itself, enhancing the sensitivity and stability of satellite signal reception, thereby improving positioning accuracy. Active GPS antennas are typically more complex than passive antennas but excel in applications requiring higher performance.

How to distinguish between active GPS antennas and passive GPS antennas?

1. Physical Characteristics: Active GPS antennas are typically larger than passive GPS antennas as they need to accommodate electronic components such as amplifiers. Passive GPS antennas, on the other hand, are relatively simpler and have a smaller form factor.

2. Interface Design: Active GPS antennas usually require an external power supply connection, whereas passive GPS antennas only need to be connected to the signal line.

3. Performance: Active GPS antennas generally outperform passive GPS antennas in terms of signal reception sensitivity and anti-interference capability, making them suitable for applications that demand high positioning accuracy.

Application Scenarios:

- Passive GPS antennas are suitable for applications with less stringent antenna requirements, such as vehicle navigation systems and smartwatches.

- Active GPS antennas are suitable for scenarios requiring high positioning accuracy or operating in environments with weak signals and significant interference, such as precision agriculture, aerospace, and aviation.

In summary, active GPS antennas and passive GPS antennas each have their own characteristics, and the choice between the two should be based on specific application requirements to determine which type is more suitable.