Radio frequency interference, or RFI, is radiated electromagnetic “noise,” which travels through the air as radio waves. RFI shielding is a process where interference from external electromagnetic signals is reduced on electronic devices. These external electromagnetic signals are capable of disrupting the function of electronic devices. Engineers create effective RFI shields by selecting materials that attenuate the strength of an electromagnetic signal and placing them around the device’s sensitive areas. Read More…
Spira Manufacturing CorporationSan Fernando, CA | 818-764-8222
Spira Manufacturing Corp. offers the most reliable EMI gaskets & shielding for the electrical / electronic industries to meet required EMC/EMI shielding regulations.$$$
Sealing Devices Inc.Lancaster, NY | 716-684-7600
Sealing Devices is a leading North American distributor and fabricator of EMI shielding products, including conductive elastomers, Soft-Shield® low closure force gasketing, windows, conductive adhesives, formed-in-place parts, vents and elastomers.$$$
Omega Shielding® ProductsRandolph, NJ | 973-366-0080
Omega Shielding Products is your premier source for high-performance, metal-stamped, fingerstock EMI RFI shielding solutions. An ISO9001:2008 certified manufacturer of EMI shielding and RFI shielding products, Omega offers an extensive line of EMI gaskets, rings and more to meet your specific needs. Omega Shielding Products maintains the highest levels of product quality and customer satisfaction.$$$
Central Coating Company, Inc.West Boylston, MA | 508-835-6225
Central Coating is the largest applicator of coatings in the Northeast. We specialize in the application of EMI shielding, industrial, textured and conformal coatings; form in place gaskets, pad printing, silk screening and value-added operations. ISO 9001:2015 registered, Central Coating specializes in the custom application of EMI shielding material using robotic and manual application methods.$$$
The Principle of RFI Shielding
There are many RFI producers and RFI-sensitive products in the average household. However, RFI is a problem because the frequency range interferes with the functions of nearby equipment and devices. As an example, radio signals can be blocked in military initiatives by RFI. As a result, these signals can compromise entire missions.
Almost every electronic device can produce RFI, but the most common producers of RFI are motors, relays, processors, computers, industrial controllers, and high-tech medical devices. Electronic shielding gaskets are capable of protecting against RFI. In addition, many shielding gaskets are designed to provide complete shielding from radio frequency interference.
These shielding products are available in many shapes, sizes, mounts, materials, and seal types. Protecting modern electronic equipment from radio frequency interference with RFI shielding is very important to improve effectiveness. This is achieved by the simple addition of a shielding gasket. There are many custom-shielding gaskets on the market.
Types of RFI Shielding
The different types of RFI Shielding include:
Metalized Conductive Foam Gaskets
Metalized Conductive Foam gaskets include nickel-copper plated polyurethane foam sandwiched between the electrically conductive polyester fabric. The metalized conductive foam core performs better at higher frequencies than conventional perimeter-conductive products, mostly at higher frequencies.
Flexible Ferrite Sheets and Magnetic Shielding Materials
These sheets are manufactured by thin, highly porous sintered ferrite with PET film and adhesive tape. Magnetic shielding materials are mostly used for near-field communication, radio frequency identification, and wireless charging applications. They are manufactured in standard ferrite layer thickness sheets and gaskets cut to the requirements.
Spring Finger Contact Strips
Spring finger contact strips are manufactured in stainless steel or beryllium copper. They come in standard coils or lengths and are used for frequent access door seals. They are also used on lids ranging from small hand-held devices to room-sized enclosures.
RFI Absorbers WAM
RFI Absorbers WAM is made from magnetic particles in a polymer resin for producing a composite absorber material. They are manufactured in sheet form or cut gaskets. They reduce RFI noise within enclosures by attaching to flexible connectors, cables, or positioning near LCD.
Board Level Shields
Board-level shields are manufactured as one-piece and two-piece surface mount shields. They minimize crosstalk, provide isolation of board-level components, and they reduce susceptibility without impacting system speed.
Conductive Silicone Elastomer
Conductive silicone elastomer is made from a range of fillers in a silicone elastomer. They are manufactured in sheet form and custom die-cut shapes, gaskets, O-rings, etc.
Conductive Fabric over Foam Gaskets
Conductive fabrics are coated fabrics wrapped over a soft sponge core (the foam gasket). They provide excellent conductivity as well as efficient shielding. They are supplied in the form of custom gaskets or shaped profile strips. They are used on panels, doors, chassis, and enclosures.
Conductive Cloth offers good conductivity and a shielding effect. In addition, they provide high friction, abrasion resistance, and good metal binding.
Applications of RFI Shielding
Almost every industry that uses or produces electronic devices prone to electromagnetic interference can utilize RFI shielding. These industries have direct interests in reducing interference from external signals. These interfering signals have potential complications that range from the low-quality audio transmission to the complete failure of a rail control system. Many industries rely on RFI shielding, including:
- Medical technology
- Electric vehicles
- Satellites and telecommunications
- Military and defense
Benefits of RFI Shielding
RFI shielding tapes can:
- Reduce signal interactions that cause communication problems.
- Be cost-effective and highly versatile.
- Be customized to fit any unique shielding application.
- Ensure optimal performance of equipment.
- Ensure the safety of equipment in a broad range of industries.
Choosing the Right RFI Shielding Supplier
To ensure the most positive outcome when purchasing RFI shielding from a RFI shielding supplier, it is important to compare several companies using our directory of RFI shielding suppliers. Each RFI shielding company has a business profile page highlighting their areas of experience and capabilities, along with a contact form to directly communicate with the supplier for more information or request a quote. Review each RFI shielding business website using our patented website previewer to quickly learn what each company specializes in. Then, use our simple RFQ form to contact multiple FRI shielding companies with the same form.