First, the classification of electromagnetic shielding principle

How far is the effective shielding distance of the

Under normal circumstances, high-power mobile phone jammers are selected for outdoor open areas and large-scale open areas, while low-power mobile phone jammers are selected in indoor environments. If you choose the other way around and install the low-power type outdoors, this s

When the area of the site used is larger than the effective shielding range, it is recommended to use multiple shields for honeycomb installation to ensure the shielding effect. Since the power supply and antenna are dedicated to the host, and are debugged one-to-one at the time

This year, mobile phone jammers with signal interference function have been installed in many examination rooms by examination management agencies around the world as a technical means to prevent college entrance examination candidates from cheating. However, on May 24, an articl

As of the end of 2021, according to data released by the Ministry of Industry and Information Technology of China, all prefecture-level cities, more than 97% of county-level urban areas, and 40% of townships and streets in China have achieved 5G signal network coverage, and 5G te

Speaking of exams, I believe this is something that everyone is very familiar with. In my student days, I actually experienced various exams, large and small. There are monthly exams arranged by the school itself, and there are more important ones like some high school entrance e

"Black flying drone" refers to flying without registration and approval, not in accordance with the guidelines and management regulations, the weight of the drone does not exceed 7 kg and it is flying within the line of sight (the flying radius is less than 500 meters o

Unmanned aerial vehicles are not surprising to us. In online shopping malls, we will see various models of four-axis drive remote control drones, which can be children's toys and make children very excited. And a drone with a camera attached can take aerial photography, which is

This technology integrates radar systems, airborne early warning systems, satellite networks, and ground visual reconnaissance to detect and track invading UAVs. This step is very critical and provides important information for follow-up operations.