I believe that we are no stranger to UAVs. With the rapid development of UAVs, many industries have been involved, such as agriculture, entertainment, aviation and so on. However, there are also loopholes for criminals to use drones to make...

During key confidential units, detention houses and major meetings, in order to ensure that the unit information is leaked and prevent the use of wireless equipment for information transmission. It is a necessary choice to install full-band signal shield and...

In prisons, detention centers, drug treatment centers and other regulatory places, mobile phones and other communication tools are prohibited from being brought into the regulatory area. Once mobile phones are brought into the regulatory place by...

With the popularity of "low, slow and small" aircraft in the civil market, in order to strengthen the safety management of civil UAVs, and to ensure public safety and flight safety, in accordance with the Civil Aviation Law of the People's Republic of...

Communication principle: within a certain frequency range, the mobile phone segment and the base station are connected by radio, and the data, voice, text, image and other electrical signals needed to be transmitted are modulated on the radio wave and...