A shielded room is a modern protective device built to shield radar microwave radiation and reduce harm to the human body. When using it, some of the effects are good, while others are not. What are the reasons for this? Let's take a look together!
The better the conductivity and magnetism of the material, the higher the shielding effectiveness. The specific material to be used depends on whether the shielding mainly relies on reflection loss or absorption loss to determine whether to focus on conductivity or magnetism;
When the frequency is low, the absorption loss is very small, and the reflection loss is the main mechanism of shielding effectiveness. It is necessary to maximize the reflection loss as much as possible;
3. Reflection loss is related to the characteristics of the radiation source, and for electric field radiation sources, reflection loss is significant; For magnetic field radiation sources, the reflection loss is very small.
4. Reflection loss is related to the distance between the shielding body and the radiation source. For electric field radiation sources, the closer the distance, the greater the reflection loss; For magnetic field radiation sources, the closer the distance, the smaller the reflection loss.
When the frequency is high, absorption loss is the main shielding mechanism, which is not related to whether the radiation source is an electric field radiation source or a magnetic field radiation source.
In fact, the factors that affect the effectiveness of the shielding room are not only material issues, but also related to the components of the product itself. The shielding chassis is very important for the product, and severe electromagnetic interference can cause the equipment inside to not work properly. Therefore, from the perspective of electromagnetic shielding, the main consideration is the type of electric field waves shielded. For electric field waves, plane waves, or high-frequency magnetic field waves, metals can generally meet the requirements. For low-frequency magnetic field waves, materials with high permeability, high magnetic density, and high sensitivity should be used.
The above is the question that the effectiveness of the shielding room is related to the material. If you want to consult or work in this field, you can contact us~
