Differences Between GPRS, Wi-Fi, and Bluetooth Wireless Antennas
1. GPRS Antennas Are Different for Each GSM Frequency Band
GPRS uses the GSM frequency band for digital transmission, which was
890-960 MHz in the 2G era and expanded to 900-1800 MHz in the 3G era. Different
carriers use different channels, and 2G and 3G frequency bands are also
different, so 2G and 3G GPRS antennas are also different.
2. Wi-Fi and Bluetooth Wireless Antennas
Wi-Fi and Bluetooth wireless antennas both use the 2.4 GHz frequency band,
but if you break it down, the two protocols use different frequency channels.
It's like lanes on a highway: Wi-Fi uses the side lanes, and Bluetooth uses the
truck lanes. Cars can't use the truck lanes, and trucks can't use the side
lanes. Because the frequency channels are similar, antennas can be used
interchangeably, but performance may vary (since PCB antennas cover a wide
frequency band, this is not a concern). Any whip antenna can be used for both
Bluetooth and Wi-Fi, as Bluetooth and Wi-Fi antennas have similar signal
requirements, both requiring communication over a range of approximately ten
meters.
However, GPRS antennas have very high signal requirements. Cellular GPRS
networks typically have a communication radius of several kilometers, and
receiving devices typically use specialized circular aperture antennas;
otherwise, they will not receive a signal. GPRS frequencies typically operate
around 1 GHz, while Wi-Fi operates between 2.4 and 5 GHz, with Bluetooth
operating similarly. Therefore, Wi-Fi, Bluetooth, and GPRS antennas require
different antennas.
There is a relationship between wavelength and receiving antenna size:
different wavelengths require different antenna sizes. There's also the issue of
impedance matching, which can cause signal reflections and significant signal
attenuation.
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