GPS is a terminal device that receives signals for precise positioning or navigation. To receive the data signal, it is necessary to use an antenna. What is the classification of GPS module antenna?
A: from the polarization method GPS module antenna is divided into vertical polarization and circular polarization.
With the current technology, it seems that in terms of performance, circular polarization is more effective. Therefore, except for special circumstances, GPS module antenna will choose circular polarization!
Second: from the installation method of GPS module antenna is divided into embedded antenna and external antenna.
The current stage of the GPS module slowly miniaturized, integrated, so the GPS module antenna more use embedded installation and placement. At this time, the antenna must be on all metal components, shell plating process and excellent grounding device to avoid EMI interference signals, such as CPU, SDRAM, SD card, crystal oscillator circuit, DC/DC.
Third: from the power supply system method, GPS module antenna embedded antenna is divided into digital amplifier and passive antenna.
1. Passive antenna: generally do not have to switch the power supply system, so called passive antenna.
As shown in the figure is the GPS module and antenna integration of passive antenna
(1) silver layer.
Ceramic antenna surface silver layer can jeopardize the intrinsic frequency of the antenna, the idealized frequency band is 1574.42MHZ, in the time to make the silver surface can be adjusted to radio broadcast point.
(2) Ceramic plate.
Ceramic powder shape of the advantages and disadvantages and sintering method immediately affects its performance, the larger the total area of the ceramic plate, the higher the number of resonance.
2. digital amplifier antenna
Generally is to power the system antenna module, is made of porcelain antenna, LNA (low noise data signal module), cable, connectors, plus a sealed moisture-proof ring, also known as the G-mouse.
Skyworks measurement and control technology (SKYLAB) in the wireless network module industry has been dry for more than 15 years, there are sufficient hardware software development and design experience of the new technology elite team. SKYLAB can give a series of products industrial production-grade high-quality GPS, BDS, GLONASS, GALILEO and other GNSS positioning and navigation modules, WIFI modules, cell phone Bluetooth modules, and indoor positioning technology solutions. Positioning technology solutions.
