1/2-5-CN3490

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Shielding and absorbing materials are essential components of any device designed to protect against Radio Frequency Interference (RFI) and Electro Magnetic Interference (EMI). Quite often, these materials are the deciding factor in whether a device is able to achieve its desired shielding performance. In this article, we will take a look at one such material, the 1/2-5-CN3490 shielding and absorbing material, both its application field and working principle.

Application Field

The 1/2-5-CN3490 shielding and absorbing material is a high-performance material designed for a variety of applications, such as military/aerospace, telecoms, high-performance EMC/EMI and RF testing, and industrial automation. It is a composite material that comprises a thin film laminated between a special grade of paper and a non-conductive base material. This composite material offers high-frequency noise shielding of up to 50dB and is light weight, flexible and easy to process.

The 1/2-5-CN3490 shielding and absorbing material is specifically designed to reduce or eliminate common-mode and differential-mode interference, making it ideal for use in a range of applications including military/aerospace, telecoms, EMC/EMI, and RF testing. In addition, it has been proven to meet the most stringent performance requirements and is currently being used in a variety of demanding applications such as high-speed communication systems, space vehicles and ground-based systems.

Working Principle

The 1/2-5-CN3490 shielding and absorbing material achieves its noise-reducing capabilities by the combination of a conductive large-area conductive layers and a dielectric interlayer which maintains the separation of the conductive layers. This special material combination allows for minimal signal leakage on both sides of the shield, thus eliminating the factors that are responsible for the formation of standing waves and associated reflections which can cause interference.

The high-performance material\'s shielding and absorbing performance is due to a combination of three distinct layers: two of which are conductive copper foils, and the center-one is a dielectric polymer material with high dielectric properties. The two copper foils are separated by a thin layer of dielectric polymer material that acts as an isolator and maintains a constant separation. As the incoming radio-frequency is incident on the top conductive layer, it encounters the dielectric layer and is reflected back inside the cavity of the shielded material, the dielectric layer acting as a buffer or impedance matcher and preventing the signal from being dispersed outside. In addition, the dielectric polymer material also helps to absorb the incoming high-frequency noise.

To further improve performance, the 1/2-5-CN3490 shielding and absorbing material has an additional three metal layers. These conductive layers help to absorb and reflect any outgoing signals on the ground plane. The result is a significantly improved shielding performance in comparison with a single-layer design.

Conclusion

The 1/2-5-CN3490 shielding and absorbing material is a high-performance composite material designed to offer effective shielding and noise absorption solutions to a range of applications including military/aerospace, high-frequency communications, and RF testing. Its shielding performance is due to a combination of two conductive layers and a dielectric interlayer which works to maintain the separation between the two layers, absorb the incoming noise, and prevent it from escaping into the environment. In addition, the addition of three metal layers further improves the performance of the material.

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