GPS antennas can be divided into vertical polarization and circular polarization in terms of polarization mode. The effect of vertical polarization is not as good as that of circular polarization
source:Industry News release time:2023-06-28 Hits: Popular:realtime gps tracker online
GPS antennas can be divided into vertical polarization and circular polarization in terms of polarization mode.
The effect of vertical polarization is not as good as that of circular polarization. Therefore, except for special circumstances, GPS antennas will adopt circular polarization and linear polarization.
2. In terms of placement, GPS antennas are divided into internal antennas and external antennas.
The assembly position of the antenna is also very important. In the early days, GPS handheld devices mostly used flip out antennas. At this time, the antenna was basically isolated from the interior of the entire machine, and EMI had almost no impact on it, resulting in good satellite reception effects. With the trend of miniaturization, GPS antennas are often built in. At this point, the antenna must be above all metal devices, and the shell must be electroplated and well grounded, away from EMI interference sources such as CPU, SDRAM, SD card, crystal oscillator, DC/DC.
The application of in car GPS will become increasingly common. The outer shell of the car, especially the explosion-proof film, poses a serious obstacle to the GPS signal. An external antenna with a magnet (which can be attached to the roof) is very necessary for car GPS.
3. In terms of power supply, it can be divided into active and passive.
The external GPS antenna is an active antenna, while the external GPS antenna is basically an active antenna. The passive antenna does not include an LNA amplifier, it is just the antenna body.
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