Mobile phone detection gates and detection gates protect the military camp’s defense line

Mobile phones have become the terminal carrier of the mobile Internet and have become an indispensable terminal and carrier for everyone to obtain information, entertainment, record information, navigation, etc.

Leaks of secrets caused by mobile phones are common, leading some core security units to strictly control the use of mobile phones. As a military unit of the country, the security and confidentiality of the army can be said to be unquestionable. The use of force opponents is also strictly controlled. Many technical means have been adopted and corresponding management systems have been introduced to prevent leaks caused by mobile phones. So the current military construction of mobile phone control mainly includes the following measures:

Another type of mobile phone signal detection detector is the mobile phone detection gate

So how does the mobile phone detection gate prevent mobile phones! Next, listen to the editor and tell you slowly.

Mobile phone detector is a device that emits fundamental wave signals, receives 2nd, 3rd or even higher harmonic/combined wave signals re-radiated from the target, and judges, identifies and detects the target mobile phone. Compared with signal equipment, mobile phone detectors can not only obtain fundamental wave channel information from the target, but also obtain 2nd, 3rd and higher order information. The mobile phone can be detected whether it is turned on or off. Its main detection objects are metal nodes and PN junctions in mobile phones.

Function configuration

Mobile phone detectors are essentially harmonic radars from the original military field. There are two major methods of system composition: single-frequency mode and dual-frequency mode. The former transmits the fundamental wave f0 through the transmitter, and the receiver receives the second harmonic 2 f0 and the third harmonic 3 f0 after being re-radiated by the nonlinear target. Early harmonic radars all used single-frequency mode and had a simple structure, but the transmitter and receiver shared a common antenna. If the antenna has a metal oxide layer or a contact surface with different media, it may also cause harmonic generation, which will cause interference to the received signal. Today’s mobile phone detectors all use dual-frequency mode, that is, they use two different transmission frequencies f1 and f2, and receive combined waves f1+f2 and 2f1+f2 (it can also be f1+2f2) to identify PN nodes and metal nodes, avoiding harmonic interference on the transmitting antenna.

Confidentiality Department

The current electronic technology is developing rapidly, and a large number of electronic products with cameras and recording functions, such as mobile phones, voice recorders, etc., are emerging one after another. This has brought hidden dangers to the security work of the confidential department. Mobile phone detectors can detect electronic devices carried by people, which can fundamentally prevent illegal activities such as video and audio recording in important meetings or places, and safeguard national security.