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The characteristics of electromagnetic wave absorbing materials

Author:admin   AddTime:2021-08-20

The absorbing material is a functional composite material that mainly absorbs electromagnetic waves, which can eliminate the back and forth reflection of electromagnetic waves in the shielding cavity, reduce the interference of clutter to its own equipment, and effectively prevent the interference and damage of electromagnetic waves to the human body. Electromagnetic radiation to surrounding equipment and personnel. This is an advanced means to eliminate electromagnetic wave pollution.

Common thicknesses include: 0.08mm0.1mm 0.2mm 0.3mm In handheld devices such as NFC payment mobile phones, electronic tags should be integrated or affixed to the electronic device as part of the function of the device, usually due to limited space Inside, RFID tags (usually passive) will inevitably be pasted on the surface of conductive objects such as metals or where there are metal devices near them. In this way, the alternating electromagnetic field excited and induced by the signal sent by the card reader is easily weakened by the eddy current attenuation of the metal, resulting in failure of the reading process.




Therefore, in order to make better use of the card reader, it is necessary to add absorbing materials to the product. The wireless charger changes from a 220V power supply to a sympathetic electromagnetic field, and then the sympathetic electromagnetic field generates a sympathetic electromagnetic field, and then, the sympathetic electromagnetic field becomes a current charge; when the sympathetic electromagnetic field encounters a metal, an electronic eddy current will be generated, which will cause skin to the metal The effect is that heat energy is generated on the metal, which reduces the charging efficiency and wastes electrical energy. Moreover, the interference to the circuit board will affect the normal operation of the entire charger. By using an absorbing material to provide a circuit for a sympathetic magnetic field through a high magnetic flux, efficiency can be improved.

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