GPS jammers, mobile signal amplifiers, and concealed drone devices GPS jammers are used as personal vehicle anti tracking products to shield drone devices from some civilian grade drones on the market. It can cut off the image transmission channel to prevent the transmission of video aerial photos, protect a certain area, and prevent privacy from being disclosed

　　Physical shielding

　　Physical shielding is the use of physical barriers to block signal propagation.The specific methods include:

　　Metal shielding box and shielding bag:The metal shielding box and shielding bag effectively block communication signals between mobile phones and base stations through the reflection and absorption of metal materials.

　　Metal structure of buildings:In buildings with a large number of metal structures,such as metal framed offices or metal roofed warehouses,mobile phone signals will be shielded to a certain extent.

　　Metal mesh curtains or wall panels:Install metal mesh curtains and wall panels using materials made of metal wire to reduce the propagation range of mobile phone signals.

　　Equipment shielding

　　Equipment shielding mainly involves the use of specialized shielding devices.The specific methods include:

　　Signal jammer:It achieves a shielding effect by emitting electromagnetic waves of a specific frequency to interfere with the transmission of mobile phone signals.The use of signal blockers requires compliance with laws and regulations to avoid interference with normal communication activities.

　　Interference device:emits interference signals with the same or similar frequency as the mobile phone signal,interfering with the normal transmission of mobile phone signals.It is also necessary to comply with laws and regulations.

　　Software blocking

　　Although software blocking cannot directly block signals,it can be set to reduce the phone's signal reception capability.The specific methods include:

　　Modifying the mobile network mode or receiving frequency band:Setting the phone to manual mode and adjusting the receiving frequency band to be outside the blocking frequency range can reduce the receiving ability of the phone signal to a certain extent.

　　In summary,communication signal shielding can be achieved through various methods such as physical,device,and software,depending on actual needs and scenarios.