MAJR Blog

News & Updates

TEMPEST, SCIF, and Electronic Shielded Enclosures

October 8, 2019

For systems to be certified to TEMPEST (Telecommunications Electronics Material Protected from Emanating Spurious Transmissions) specific test standards need to be passed such as NSA No. 94-106 for shielded enclosures and other NSA standards depending on the intended environment and operation. The TEMPEST certified telecommunications electronic enclosure needs to be a “Faraday Cage”. A Faraday Cage is an enclosure made of electrically conductive materials capable of blocking magnetic and electric fields, commonly known as the electromagnetic field, see Figure #1.   Faraday Cages come in all sort of sizes and configurations. A typical Faraday Cage is an electromagnetic shielded enclosure usually constructed ... Read more

EMI Gaskets: Die-Cut, Water Jet & Flash Cutting

August 26, 2019

EMI gaskets are used in a variety of electronic devices where EMI/RFI is an issue including communications, military electronics, and RF applications. When it comes to manufacturing EMI gaskets, there are three different methods MAJR Products uses: 1. Die-Cut 2. Water Jet 3. Flash Cutting Each of these three manufacturing techniques have specific benefits associated with them and are best suited for a plethora of different products and materials including: Conductive materials Rubber Cork Foils Silicones Neoprenes Porons Thermal Materials Tapes Thin Films Mylar Kapton 1. Die-Cut Die-cutting is a high-speed method of using a die to shear webs of low-strength materials in order to mass produce a wide range of industrial products, including gaskets. MAJR creates a predesigned ... Read more

MAJR Products Is Now A Raytheon Company Approved Supplier for Welding

July 12, 2019

MAJR Products Is Now A Raytheon Company Approved Supplier for Welding MAJR Products is proud to announce that we are a recent addition to the Raytheon Company Approved Supplier List for welding products.  This approval formalizes the existing relationship between MAJR Products, Raytheon, and its various partners. This fruitful partnership will allow MAJR Products to expand the scope of our services and the industries we serve. We are very excited about this opportunity.  About Raytheon Raytheon is a technology and innovation leader specializing in defense, civil, and cybersecurity markets around the world. This prestigious company strives to provide the maximum practical opportunity for many diverse businesses, including small businesses and veteran-owned companies, like MAJR ... Read more

MAJR Products To Sponsor 2019 SAE G46 EMC Meeting At The IEEE EMC Symposium

June 8, 2019

MAJR Products To Sponsor 2019 SAE G46 EMC Meeting At The IEEE EMC SymposiumThe internationally recognized manufacturing leader of EMI/RFI shielding products, MAJR Products, will be sponsoring the SAE G46 EMC Meeting at the 2019 International Symposium on Electromagnetic Compatibility, Signal & Power Integrity, in New Orleans, Louisiana. About The 2019 IEEE EMC Symposium Also known as the IEEE EMC Annual Symposia, the IEEE EMC Symposium, the IEEE International Symposium, and the IEEE International Symposium on EMC+SIPI, this conference is the must-attend event of the year for EMC and SIPI professionals from all over the world who are interested in learning more about electromagnetic compatibility as well as signal and power integrity techniques. This year’s ... Read more

Keeping emitting sources and radiating paths under control with EMI Shielding Tape

December 17, 2018

Keeping emitting sources and radiating paths under control with EMI Shielding TapeIn simple terms, radiated EMI emission starts from an emitting source, propagates via a radiating path and reaches a susceptible receiver. The strength of the radiated EMI is determined by the source, the media surrounding the source and the distance between the source and the susceptor1…unless there are cables in close proximity to the source or receptor, in which case all bets are off. In that case you need EMI shielding tape. Electronic or electrical cables can compound EMI noise problems as they are major transmitter of stray signals. Unshielded cables can act as a conductor, sending direct disruption to sensitive ... Read more

MAJRabsorber™ : The Latest Innovation in RF Absorber Material and Changing How we Think About What is Possible

November 7, 2018

MAJRabsorber™ : The Latest Innovation in RF Absorber Material and Changing How we Think About What is PossibleEvery once in awhile true innovation transforms an industry.  Consider what the cloud has meant for business as it brought about data storage, access and co-worker collaboration.  Look at how the Internet of Things is frontiering cashierless shopping. Such champions in innovation will not only make the industry and applications they integrate with faster, easier or better, they change the way we think about what’s possible.  Over time these disruptors soon become the new industry standard and we wonder how we lived without them before their introduction. For the EMI/RFI shielding industry, this transformative shift is now taking place in ... Read more

Conductive Elastomers: Silicone vs. Fluorosilicone
Will Your Hardened Enclosure Remain Effective in Harsh Environments?

September 19, 2018

Conductive Silicones are often an essential component for hardened boxes and enclosures where environmental sealing and EMI/RFI shielding is required. The typical silicone-based gaskets and seals are impregnated with nickel, silver, copper, aluminum or other conductive particles to give non-conductive silicone their conductivity while providing IP rated environmental sealing that is required in many military electronic applications. These Conductive Silicone materials are also very flexible and can be formed into sheets, extrusions in various profiles, strips, washers and custom molded parts to fit almost any specific requirement, regardless of how unique. But the one issue with these essential conductive silicone ... Read more

Custom EMI Ventilation Panels: An End to the “Square Peg – Round Hole” EMI Shielding Dilemma

August 15, 2018

Hardened enclosures come in all shapes and sizes.  When you compound the possibilities of various applications, industries, specifications and regulatory authorities, it’s no wonder that standard sizes, types or material for shielding a hardened enclosure rarely meet specific needs for any given project.  Even though most hardened enclosures are custom designed with specific requirements in mind they often have one thing in common: They all must breathe to allow cooling of sensitive electronic equipment while also being protecting from EMI/RFI. Up until now this has been an ongoing problem for engineers.  Rarely are enclosures designed to be able to use standardized ... Read more

EMI/RFI Wire Mesh Grounding and Conductive Elastomer Washers: Hardened Enclosure Shielding in Small Places

July 19, 2018

EMI/RFI Wire Mesh Grounding and Conductive Elastomer Washers: Hardened Enclosure Shielding in Small PlacesThe smallest details are often the ones that will determine whether an EMI hardened enclosure will be compliant or will not  meet EMC requirements. That’s especially true when it comes to the many bolts, screws, rods or shafts that need EMI/RFI shielding or grounding.  When you have to attenuate a signal or ground components of an enclosure, don’t forget the EMI/RFI wire mesh grounding or conductive washer. Here’s what you need to know: EMI/RFI Wire Mesh Grounding Washers EMI/RFI wire mesh grounding washers are made from wire mesh socks that look somewhat like thin knitted metal hoses before being compressed in a ... Read more

Conductive Coatings for Plastic Hardened Enclosures: Getting the Job Done Quickly and Cost Effectively

June 20, 2018

Conductive Coatings for Plastic Hardened Enclosures: Getting the Job Done Quickly and Cost EffectivelyThere is no doubt that plastics have their design advantages when building many hardened enclosures. Plastics products in various forms, such as acrylics, ABS or structural foams, are quick and inexpensive to produce once tooling is in place and can be molded or configured in complex designs much more readily than some other substrates. But because plastics are electrical insulators which easily allow EMI or RFI waves to penetrate the substrate, conductive coatings, i.e. conductive paints, pick up the slack where plastic alone would allow failure of your hardened enclosure. It becomes imperative, therefore, to consider conductive coatings when using ... Read more