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Why the shielding box should be used with the filter

Author:admin   AddTime:2021-02-28

Shielding box It is a metal body that uses various shapes of shields made of conductive or magnetic materials to limit the electromagnetic ability to a certain space range and is used to suppress radiation interference. And deal with the conduction and radiation, so as to realize the equipment that provides a non-interference test environment for the wireless communication equipment under test. As the name implies, it is to prevent external radiation interference to the internal circuit of the shielding box, and vice versa. Only for radiation.

The filter is mainly to filter out conducted interference, and there are low frequency and radio frequency. Only for conduction.

The shielding box will definitely input or output the wire harness, and the electromagnetic wave interference of the external radio frequency radiation will be coupled to the wire harness and become the conducted interference. . It is conceivable that they should be used together, and the filter is best combined with the metal of the shielding box. There is no way to combine it, so the closer the better.

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