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Absorbing materials for suppressing electromagnetic interference

Author:admin   AddTime:2021-08-26

The three elements that produce electromagnetic interference are the disturbance source, the coupling path and the susceptor.

In the process of electromagnetic compatibility design and improvement, the commonly used methods to suppress electromagnetic interference include grounding, shielding, and filtering.

These three methods are of great significance for improving the electromagnetic compatibility of the equipment. In solving the problem of high-frequency electromagnetic interference, the use of shielding solutions is increasingly unable to meet the requirements. In many devices, the port settings and the requirements of ventilation and windows make it impossible for the actual shielding method to form a fully shielded electric cage like a Faraday electric cage. The port size is a major threat to the high frequency of the equipment.



In addition, there is another problem that plagues people. After the equipment is effectively shielded, although the external interference is solved, the electromagnetic interference still exists in the shielding system, and even the shielding causes the interference to aggravate and even causes the equipment to fail to work properly.

These are the problems of shielding, and it is precisely because of these problems that absorbing materials are useful.

Absorbing material refers to a type of material that can effectively absorb incident electromagnetic waves and cause them to scatter and attenuate. It converts incident electromagnetic waves into heat or other forms of energy through various loss mechanisms of the material to achieve the purpose of absorbing electromagnetic waves.

Unlike shielding solutions, its effectiveness lies in reducing the number of interfering electromagnetic waves. It can be used alone to absorb electromagnetic waves, or it can be combined with a shielding system to improve the high-frequency efficiency of the equipment.

ferrite sheet:https://www.goodsmaterial.com/

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