Do you know the role of GPS antennas?
Published:
2023-01-03
system is more and more widely used in our lives, which is inseparable from the important role of GPS antenna, the following GPS antenna manufacturers to tell you the specific role of GPS antenna.
Do you know what GPS antennas do
?1. It is used to catch satellites and receive satellite positioning information, that is, to radiate and receive electromagnetic waves. Any high-frequency circuit, as long as it is not completely shielded, can radiate electromagnetic waves to a greater or lesser extent into the surrounding space, or receive electromagnetic waves more or less from the surrounding space. According to the different GPS antennas, it can be divided into flat panel antennas and spiral antennas, and the spiral antenna has stronger star search capabilities.
2. The electromagnetic wave energy of the radio signal transmitted by the satellite is converted into the current that the receiver electronics can absorb the application, that is, energy conversion. Usually for special equipment or vehicle-mounted equipment, because the device is often at a certain distance from the GPS receiving module, a burst line of more than 1 meter may be used in the real environment. However, because the feeder has a lot of loss to the signal, in this case, only an active GPS antenna can be selected.
The size and shape of the GPS antenna are important because these characteristics determine the antenna's ability to pick up weak GPS signals. GPS satellite signals are divided into L1 and L2, with frequencies of 1575.42MHZ and 1228MHZ, respectively, of which L1 is an open civil signal and the signal is circular polarization. THE SIGNAL STRENGTH IS ABOUT -166DBM, WHICH IS A RELATIVELY WEAK SIGNAL. Depending on the requirements, the antenna can be designed to operate on a single L1 frequency, or on both L1 and L2 frequencies.
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