The GPS antenna is composed of two components: the receiving antenna and the preamplifier.
The function of the GPS antenna is to convert the electromagnetic wave energy of the radio signal from the satellite into the current that the receiver electronic device can ingest and apply.
Most of the built-in GPS antennas are right-handed polarized ceramic dielectrics, and their components are: passive antennas, low-noise signal modules, cables, and connectors.
1. Passive antenna is the core technology of GPS antenna. The signal acceptance capability of a GPS antenna largely depends on the composition of its passive antenna part.
2. 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 antenna signal and cause excessive noise.
3. The selection of cables should also be based on reducing reflections to ensure impedance matching.