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In the early stage of the development of smart phones, limited by the shape design process, GPS antennas mostly adopt external solutions. This kind of external antenna is far away from the complex components inside the fuselage, and it is little affected by electromagnetic interference (EMI), so the stability of satellite reception is particularly excellent, and it can continuously output reliable positioning signals.
With the increasing demand for "light and compact" mobile phones in the consumer market, the built-in GPS antenna has gradually replaced the external antenna as the mainstream with the advantage of not occupying external space. The antenna must be installed above all metal devices of the equipment to avoid metal shielding signals; High-quality electroplating grounding treatment should be completed for the equipment shell to reduce internal interference; At the same time, keep a sufficient distance from the main board, batteries and other electromagnetic interference sources.
The antenna has been precisely adjusted in core performance parameters, and it has excellent performance from positioning accuracy to signal transmission efficiency: the center frequency of GPS strictly matches the international standard frequency band of 1575.42MHz, which provides a solid foundation for high-precision positioning and ensures the accuracy of positioning data; The voltage standing wave ratio (V.S.W.R) of GPS is controlled within the range of ≤1.8, which can minimize the reflection loss during signal transmission, enable GPS signals to be transmitted with higher efficiency and avoid signal attenuation.
The gain of 4G communication frequency band is 6dBi, which can effectively extend the signal coverage, solve the problem of weak signal in remote areas or mobile scenes, and strengthen the coherence of voice call and data interaction; The Beidou positioning frequency band gains up to 32dB±3dB, which can keenly capture the weak signals emitted by satellites and convert them into accurate positioning data after amplification, thus fundamentally ensuring the positioning reliability of vehicle navigation, outdoor mapping and other scenes, and can stably lock the stars even in urban canyons with dense high-rise buildings.
Early mobile phone GPS antennas were mostly external, why are they all built-in now?
Early mobile phones were limited by the shape design process, and the external GPS antenna was the mainstream choice, which was far away from the internal components of the fuselage, and suffered little electromagnetic interference (EMI) and had good satellite receiving stability.
GPS voltage standing wave ratio (V.S.W.R)≤1.8, is this parameter important? What does it stand for?
Voltage standing wave ratio (V.S.W.R) is an index to measure the degree of signal reflection, and ≤1.8 means that the reflection loss of the signal in the transmission process is extremely small, which can make the GPS signal transmit with higher efficiency, reduce the signal attenuation and ensure the stable transmission of the positioning signal from the antenna to the system.
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Main Product:
TV Antenna,
GPS Antenna,
GSM Antenna ,
4G Antenna,
Wifi Antenna,
RF Cable
