What is the role of the shielded room?

-2018-08-15-

The shielded chamber is a closed chamber composed of a metal plate or a metal mesh to prevent electromagnetic interference. The radar microwave radiation leakage value of the shielded room fully meets the restraint standard, and together with the mass exposure restraint standard, it can play a useful protective effect on the human body working and enjoying it nearby.

In addition to the broadcast section electric field, most of the metal materials can require more than 100dB of barrier performance. However, in theory, the rare state of the metal barrier body does not have such high resistance performance, so that it has almost no barrier effect. This is because many planners do not understand the key to the barrier room.
First of all, the need to understand is that the electromagnetic barrier chamber is not connected to the grounding of the resistance body. This is different from the barrier of the electrostatic field. In the static electricity, as long as the screen barrier is grounded, it can effectively block the static magnetic field, while the electromagnetic barrier chamber It is necessary to understand whether the barrier body is grounded or not.
Secondly, there will always be a walkie-talkie on the chassis. There will be at least one power walkie-talkie. The power line will greatly damage the barrier body and increase the barrier barrier effectiveness by a few tenths. Walkie-talkies are one of the first methods in barrier planning, and the hazards of ultra-superconductors passing through the barrier are sometimes more harmful than the holes.
There are two key points in the barrier chamber, one is to ensure the conductive continuity of the barrier body, that is, the entire barrier body needs a good, continuous electrical conductor, and the other point is that there is no super superconductor passing through the chassis, for a theory The chassis, the rise of these two points is very difficult.