MAJR is an internationally recognized manufacturer of Electromagnetic Interference and Radio Frequency Interference (EMI/RFI) Shielding Products.

MAJR serves the electronics industry, specifically aerospace, telecommunications, computers, medical devices, instrumentation, commercial electronics, government and military.

Products consist primarily of gaskets, Elastomers, EMI windows, board level shields, fabric over foam, fingerstock, air ventilation / filtration panels and form-in-place gaskets.

EMC FUNDAMENTALS

• EMC – Electromagnetic Compatibility; the state in which an electronic device can function properly in its’ intended environment without interference from electromagnetic or radio frequency waves from that environment.
• EMI – Electromagnetic Interference (10 Kilohertz to 40 Gigahertz)
• RFI – Radio Frequency Interference (30 Kilohertz to greater than 3 Gigahertz)
• Conducted Interference is energy that is conducted through hard wire and circuitry.
• Radiated Interference is energy radiated through air to an electrical system (described as electric field – E Field and magnetic field – H Field).
• The most essential aspects of effective electrical system immunity are Shielding, Grounding and Ground Planes
• Effective Shielding for Conducted Emissions;
• Shielded Cables and Connectors
• Use of capacitors and filters in circuitry
• Use of Ferrites
• Effective Shielding for Radiated Emissions;
• Use of Honeycomb Ventilation Panels
• Board Level Shields
• Optical EMI Windows
• Fingerstock
• Conductive Elastomer, Fabric Over Foam, Knitted Wire Mesh

SHIELDING EMI/RFI shielding products provide the ability to comply with EMC limits therefore achieving FCC / CE compliance. EMC limits are set forth by the Special Committee on Radio Interference (CISPR) of the International Electro technical Commission (IEC). The EMC limits enable electronic systems to operate harmoniously without performance degradation within harsh radiated emission environments and enhance system susceptibility.