You whisper to your girlfriend, suddenly 20 strangers rap loudly in 20 foreign languages at the same time, and you will never hear your girlfriend’s voice anymore. Can we use how to make a mobile cell phone jammer to interrupt their singing? The principle of a mobile phone signal jammer is actually very simple. The working frequency bands of public service mobile networks (such as GSM and various CDMA) have been opened and registered and approved by the competent authority. Mobile networks use higher-power interference signals to achieve shielding purposes. At present, the frequency band used in home mobile network communication is roughly: GSM receiving frequency band is 885~909 MHz (China Mobile) 909~915 MHz (China Unicom) frequency band transmission frequency is 930~954 MHz (China Mobile) and 954~ 960 MHz (China Unicom) 3G CDMA: 1880-1920MHz / 2010-2025MHz 3G Time Division Duplex (TDD) main frequency band.
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For the uplink and downlink channels of the mobile phone system, techniques such as frequency multiplication, frequency division, and frequency hopping filtering are used to analyze the required shielding frequency. Customize the spherical shielding space according to the strength of the shielding device, and automatically form a shielding magnetic field within the specified range, so that mobile phones (including PHS-PHS-GSM-China Unicom, China Mobile, CDMA-China Telecom) are invalid in this space. When the mobile phone jammer is in working condition, you can turn off the function of sending and receiving mobile phone signals within the specified range, and you can’t talk or talk to achieve the purpose of compulsory prohibition.