Different Types of EMI Shielding Devices

EMI Shielding

Shielding from EMI (electromagnetic interference) is essential for the protection of your products and those who use them. When it comes to EMI shielding devices, there are several options. Solid and perforated shields are an option no matter what material and design type you need.
Let’s go over popular EMI shield devices:

  1. EMI Filters – These filters allow low frequencies to pass while blocking high frequencies. EMI filters do not block all EMI, so they are not recommended for all applications.
  2. Foil Shielding Tape – Shielding tape consists of conductive metal with an adhesive. This device is attractive because it’s easy to use and form-fitting. They can fit into various shapes and sizes. You can choose most metals to create foil shielding tape, including aluminum, lead, and copper.
  3. EMI Enclosures – EMI enclosures surround the equipment they protect. They are available in perforated and solid forms. Any gaps between enclosures and equipment can be closed with wire-oriented silicone gaskets.
  4. Conductive Fabric Shields – This is not a traditional fabric. It is a metallic textile with similar properties to fabric. You can either drape the shield over the product or use an adhesive to keep it in place.
  5. EMI Coatings – These devices are like paint mixed with conductive metals. You brush them onto a surface to create a shielding effect making them incredibly flexible. Other advantages are that they add no weight and do not take up additional space. However, the downside to coatings is that one scratch can compromise them.

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