EMIskjerming

EMIskjerming, also known as electromagnetic interference shielding, is a technique used to protect electronic devices from electromagnetic interference (EMI). EMI can be caused by various sources such as radio waves, electrical motors, or other electronic devices. EMIskjerming involves the use of materials and designs that block or absorb electromagnetic waves, thereby reducing the interference.

The most common materials used for EMIskjerming are conductive metals like copper, aluminum, and steel. These materials can reflect or absorb electromagnetic waves, depending on their thickness and the frequency of the waves. For example, copper is often used for high-frequency shielding, while steel is more effective for low-frequency shielding.

In addition to materials, the design of the shielding is also crucial. The shielding can be continuous, where the material forms a complete barrier around the device, or it can be segmented, where the material is placed in specific areas to block interference. The design also includes the use of grounding techniques to dissipate any remaining electromagnetic energy.

EMIskjerming is widely used in various industries, including telecommunications, aerospace, and automotive. In telecommunications, it is used to protect communication devices from interference. In aerospace, it is used to protect sensitive electronic equipment from the electromagnetic environment of space. In the automotive industry, it is used to protect electronic control units from the electromagnetic noise generated by the engine and other components.

The effectiveness of EMIskjerming can be measured using various standards and tests, such as the IEC 61000-4-21 standard for immunity to conducted disturbances. These standards provide guidelines for testing the shielding effectiveness of materials and designs.