GPRS refers to the realization of digital transmission in the GSM frequency band, which is 890-960MHz in the 2G era, and expanded to 900-1800MHz in the 3G era. The channels of each operator are different, and the frequency bands of 2G and 3G are different, so 2G and 3G GPRS antenna are also different.
Both the WIFI wireless antenna and the Bluetooth wireless antenna use the 2.4G frequency band, but if subdivided, the two protocols use channels of different frequencies, just like the channels on the highway.
Because the channels are very close, the antenna can be universal, but the effect will be deviated (due to the wide frequency band covered by the PCB antenna, it does not matter) as long as the whip antenna can be used for Bluetooth and WIFI, because the signal requirements of Bluetooth wireless antenna and the WIFI wireless antenna are almost the same, all are communication distances of about ten meters.
However, GPRS antennas have very high requirements for signals. The cellular GPRS network generally has a communication radius of several kilometers, and the signal receiving equipment generally uses a unique circular hole antenna, otherwise the signal cannot be received. The frequency of GPRS is generally around 1GHZ, while WIFI is between 2.4GHZ and 5GHZ, and Bluetooth is similar, so the WIFI wireless antenna and Bluetooth wireless antenna are different from the GPRS antenna.
There is a relationship between the wavelength and the size of the receiving antenna. The size of the antenna is different when the wavelength is different. In addition, there is the problem of impedance matching. Impedance mismatch will cause signal reflection, and the signal will be greatly attenuated.