RFI Shielding

A reliable source for EMI Shielding information and leading EMI Shielding Companies & Manufacturers.

Radio frequency interference, or RFI, is radiated electromagnetic “noise,” which travels through the air as radio waves. Read More…

RFI Shielding RFI shielding is a method of protection against any electromagnetic disturbance that is emitted from either an electrical circuit or electronic component that may interfere with the operation of other electrical circuits or components.

Leading Manufacturers

San 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. We have been providing reliable, cost-effective EMI & RFI shielding solutions for over 30 years, and to this day we continue to provide EMI products with innovation & expertise. Spira is an AS9100 and ISO 9001:2008 certified company.

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Spira Manufacturing Corporation $$$

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 as well as elastomers, pads and tapes used for managing related thermal applications. The company is ISO 9001:2008 registered.

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Sealing Devices Inc. $$$

Easton, PA  |  610-829-5000

Orbel's design and manufacturing process enables unique engineered solutions for a variety of applications. Orbel offers today's most effective EMI/RFI shielding, photo-etched precision metal parts, precision metal stampings, and electroplated metal foils. Areas of specialization include aerospace, telecommunications, electronics, medical, automotive, and manufacturing. Orbel is ISO 9001-2008 and AS 9001-C Certified. For more information, visit Orbel.com or call 610-829-5000.

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Orbel Corporation $$$

Canandaigua, NY  |  888-599-6113

Select Fabricators, Inc. manufactures flexible packaging, cleanroom assemblies, and portable EMI shielding enclosures as well as contract product assembly and fulfillment for aerospace, medical, death care and industrial customers.

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Select Fabricators, Inc. $$$

Bethlehem, PA  |  800-576-7325

Seal Science, Inc. (SSI) is an industry leader in design engineering and precision manufacturing of materials and components for critical sealing applications and advanced technology systems. SSI provides cutting edge technological solutions for mechanical and electrical systems; including structural subsystem design, signature management and electromechanical interference (EMI) shielding products. Contact us for more information!

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Seal Science, Inc. $$$

Passaic, NJ  |  973-928-8300

We are space-qualified. Located in Passaic, New Jersey, we cater to the needs of numerous technology intensive industries including the US Government and its’ contractors. MWT Materials (and our predecessor, Millimeter Wave Technology) has been active in the research, development, analysis, and manufacture of radar absorbing materials and coatings (RAM) since the early 1980’s.

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MWT Materials Inc. $$$
placeholder image Spira Manufacturing Corporation Sealing Devices Inc. Orbel Corporation Select Fabricators, Inc. Seal Science, Inc. MWT Materials Inc.

RFI is identical to EMI, or electromagnetic interference, except that EMI is conducted along wires, electrical circuits and conductors, while radio frequency interference (RFI) travels across "free" air space in the form of radio waves.

Electromagnetic interference and radio frequency interference are the magnetic fields which are given off as a bi-product of electrical currents, and both EMI and RFI impede the normal flow of electricity through currents, causing interference and malfunction in electronic devices.

Radio frequency interference is high frequency, typically 100 kilohertz or above; RF shielding is especially designed to block these high frequencies with copper, aluminum, galvanized steel, conductive rubber, plastic or EMI coating paints. RFI can be shielded by EMI enclosures, EMI coatings and EMI gaskets.

Standard RFI/EMI Shielding Enclosure Standard RFI/EMI Shielding Enclosure - Compac Development Corporation

It should be noted that not all of these block ground-conducted electromagnetic interference; EMI enclosures, gaskets and EMI coated enclosures aim to block out RFI signals traveling through the air and are not nearly as effective in trying to block conducted EMI.

EMI and RFI are created, by widely varying degrees, by everything which conducts electrical energy, including electrical wires, electrical appliances, computers and all electronic equipment. Signal-bearing electronic devices such as mobile phones, laptops and GPS devices give off RFI.

Normal electrical currents are disrupted when moderate to high levels of EMI or RFI are introduced; un-channeled electromagnetic signals and radio frequency waves can act as "noise", magnetically altering normal flow of electrical currents and impeding the flow of electrical energy.

Products such as EMI enclosures, EMI coated interiors and EMI gaskets are necessary to provide full protection from RFI, which continues to increase exponentially as more and more mobile electronic devices are introduced to the consumer market.

However, even through RFI products can be used, RFI sprays are the most common form of RFI shielding. An RFI spray, or coating, is often composed of an acrylic base in addition to pure metals such as silver, copper or nickel.

Some common applications of RFI shielding include packaging of electronic devices such as printed circuit boards (PCBs), cable assemblies, interconnects and input output filters. Industries that commonly require RFI shielding products include medical, telecommunications, electronics and military.

RFI Shielding Informational Video