1. From the polarization mode, the GPS antenna is divided into vertical polarization and circular polarization.

With the current technology, the effect of vertical polarization is less than that of circular polarization. Therefore, in addition to special circumstances, GPS antennas use circular polarization and linear polarization.

2. The GPS antenna is divided into a built-in antenna and an external antenna from the placement mode.

The assembly position of the antenna is also very important. Early GPS handhelds mostly used an external flip-flop antenna. At this time, the antenna is basically isolated from the inside of the whole machine, and EMI hardly affects it. The effect of collecting stars is very good. Nowadays, with the trend of miniaturization, GPS antennas are often built in. At this point, the antenna must be above all metal devices. The case must be plated and well grounded away from sources of EMI interference such as CPU, SDRAM, SD card, crystal, DC/DC.

The application of car GPS will become more and more popular. The car's outer casing, especially the car's explosion-proof membrane, can cause serious obstacles to GPS signals. An external antenna with a magnet (which can be attached to the roof) is very necessary for car GPS.

3. From the power supply side, it is divided into active and passive.

The external GPS is an active antenna, and the passive antenna is an LNA-free amplifier, but only the antenna body.