With the increase in electronic devices and the dramatic expansion of wireless communications, the problem of electromagnetic interference has become increasingly important. EMI may not only affect equipment performance, but may also affect communications, medical equipment, military systems, and other areas. Therefore, it has become critical to ensure that electronic devices can function properly in complex electromagnetic environments.
As an electromagnetic shielding material, micro expanded metal mesh is becoming increasingly important. It can help protect against electromagnetic interference and ensure equipment reliability. It has a lightweight structure, strong integrity, uniform surface, continuous and stable openings and flexibility to be customized.
Micro expanded metal mesh used as electromagnetic shielding mesh can be made from a variety of metal materials such as copper, aluminum, nickel, and Monel. Copper is the most widely used type. The copper content of our micro expanded metal mesh is above 99.7% (economical) and 99.9% (optimal shielding efficiency), and all of them are RoHS compliant.
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Micro expanded metal mesh is widely used in scientific research, medical equipment, high-tech anti-electromagnetic interference engineering, aerospace, military and government agencies, and other environments that require electromagnetic shielding. For different application areas of electromagnetic shielding field requirements are different:
The electrical conductivity and magnetic conductivity of the material are critical to shielding effectiveness. The good conductivity of the material is suitable for electric field radiation sources, such as copper. The good magnetic conductivity of the material is suitable for magnetic field radiation sources, such as iron.
Material selection should be based on the characteristics of the radiation source. For an electric field radiation source, reflection loss is larger, so you need to choose a higher conductivity of the material. For magnetic field radiation sources, shielding depends mainly on the absorption loss of the material, so materials with higher magnetic permeability should be used.
At high frequencies, the shielding mechanism depends mainly on absorption loss and has little to do with the nature of the electric or magnetic field of the radiation source. Therefore, the absorption properties of the material become critical.
Low-frequency magnetic fields (especially those below 1 KHz) are difficult to shield. Coping with low-frequency magnetic fields may require the use of highly electrically conductive materials, highly conductive materials, or even composites of both.
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