Perhaps we know that the GPS antenna converts the electromagnetic wave energy of the radio signal from the satellite into an electric current that can be absorbed by the receiver electronic device. Therefore, the size and shape of the antenna are very important, because these characteristics can determine the antenna's ability to obtain weak GPS signals. So what is the principle of the GPS antenna? What parts does it consist of? Let me analyze it for you below:

Principle of GPS antenna:

It uses a high-frequency, low-noise amplifier in the design of the GPS antenna unit to reduce the impact of the GPS antenna thermal noise and the previous unit circuits on the receiver performance; in the principle of GPS antenna, when GPS satellites are used to achieve navigation positioning, the main task of the user receiver is to extract the pseudo-random noise code and data code in the satellite signal to further solve the navigation information such as the position, speed and time (PVT) of the receiver carrier. Therefore, the GPS receiver is a crucial user device.

Construction of GPS antenna:

Currently, most GPS antennas are right-hand polarized ceramic dielectrics, and their components are: ceramic antenna, low-noise signal module, cable, and connector. Among them, the ceramic antenna is also called passive antenna, dielectric antenna, PATCH, which is the core technology of GPS antenna. The signal receiving ability of a GPS antenna is largely determined by the composition of its ceramic part.

The low noise signal module, also known as LNA, is the part that amplifies and filters the signal. The selection of its components is also very important, otherwise it will increase the reflection loss of the GPS signal, resulting in excessive noise. Therefore, the selection of cables should also be based on reducing reflections to ensure impedance matching