EMI Shielding for Enclosures

At MAJR Products Corporation, we have a full catalog of products that are designed to provide superior EMI / RFI shielding for enclosures.

If is not possible to shield electronics at the component level, designing a shielded enclosure with MAJR’s EMI / RFI products will enhance performance and ensure compliance.

ASK A Q: EMI Enclosure Shielding

Who Needs EMI / RFI Protection?

General contractors, construction companies, military and defense contractors, and large corporations that have sensitive information all require EMI / RFI protection.

MAJR - Generic Shielding A&J Manufacturing

Why Do Companies Need EMI / RFI Shielded Enclosures?

Commercial and military operations often use secure rooms and enclosures to protect sensitive data from communications interference or interception. MAJR's inventory of EMI / RFI shielding products prevents radiofrequency emissions from transmission into or out of a secured area by sealing specific apertures within the boxed enclosure.

EMI Shielding for Enclosures Resources

Shielding Honeycomb Ventilation Panels and Dust Filtration Characteristics

MAJR Products Corporation Vice President of Electrical/EMC Engineering, Michael J. Oliver, authored this white paper. The white paper presents airflow characteristics of electromagnetic and radio frequency interference (EMI/RFI) shielding honeycomb ventilation panels and dust filtration characteristics of dust filtration panels. For a System Engineer, airflow data helps to identify the correct panel size for electronic…

Designing EMI Shielding For Power Generators In Challenging Environments

In this post, we’ll provide you with the resources you need for any commercial or military application that might need EMI/RFI protection for a generator.

Shielded HVAC Panel Design Guide For RFI And EMI Engineers

We’re getting a lot of questions about RFI and EMI attenuation, static pressure, and airflow in HVAC air ducts that penetrate secure buildings and SCIF enclosures. Enclosures, whether they’re built for human use or sensitive electronic equipment, require openings for conditioned air to enter the space for temperature control, ventilation, or both. As we pointed…

EMF vs EMI: The Difference is a Little More Important Than One Letter

A lot of engineers use the terms interchangeably, but project success with proper electromagnetic shielding is more easily achieved with a proper definition!

MAJR’s Honeycomb Waveguides for High Reliability Requirements

As a professional, you need products that enable your operation to work correctly – from electronics to motors to EMI waveguides. When you have a situation that requires consistent air flow in an EMI/RFI shielded environment, it’s crucial to ensure that air continues to move easily through a panel while allowing for the attenuation of…

EMI Shielding Design—5 Simple Tips For EMC Professionals

Is there a process to follow when specifying EMI/RFI shielding products for electronic equipment boxes, cabinets and enclosures? At MAJR Products, we get that question from mechanical, electrical, and RF engineers all the time, especially regarding our shielded ventilation panels. This post will discuss five tips to streamline your shielded vent panel design and specification…

EMP Shielding: The Background, Need and Solutions

Definitions & Distinctions HEMP is defined as an instantaneous, intense electromagnetic pulse (EMP) field that can overload and disrupt from great distances electrical systems and microcircuits. It is generally assumed if one occurred it would be set off by a high altitude nuclear explosion; obtainable by missile flight1 or, more recently believed, from a satellite.…

MAJR Shielding Products For SCIFs | A Strategic Design Guide

What exactly are SCIFs, and why do engineers need a variety of mil-spec shielding products when designing them? SCIF’s are Sensitive Compartmented Information Facility (pronounced “skiff”), a U.S. Department of Defense term for a secure room. It can be a secure room or data center that guards against electronic surveillance and suppresses data leakage of…

MAJR Products’s Knitted Wire Mesh: The Ultimate in Engineering & Flexibility

How many times have you wished you had one material – a “go to” choice for easier product design and engineering in EMI/RFI shielding applications – that offers: That product is found in MAJR Products’ knitted wire mesh. What is MAJR’s Knitted Wire Mesh? The vast usability of the product lies in the material’s design. …

Shielded Fan Vents—Why You Need Them and How To Source Them

Are you trying to spec or source EMI/RFI Shielded Fan Ventilation Panels? If so, you’ve come to the right place. But what exactly are shielded fan vent panels, and when do you need them? We provided some answers in a previous post: EMI shielded vent panels are a critical part of hardened enclosures. Honeycomb ventilation…

Shielded Metal Wire Mesh Products from MAJR Products

One common product you will find when dealing with EMI shielding is metal wire mesh. But what is metal wire mesh and what does it do? Metal wire mesh is a strand or wire knitted together creating a structure of woven and knitted shielding material. Different types of metal wire mesh include non-hardenable types, hardenable…

MAJR Products – EMI Shielding for Any Industry, Any Need, Any Time

At MAJR, we’re proud to offer our customers a complete selection of shielding products that are designed by experts and created from military grade materials. When you work with us, you’ll be able to thoroughly review a full line of EMI shielding products and services including technical information, data sheets and applications info via our…

EMI Grounding Washers from MAJR

When you are working to ensure that your electronic enclosures are securely sealed from EMI, it’s important to use the correct materials for your application. In the event that you’re using standard flat washers that are improperly designed EMI leakage can occur causing failure in the equipment and entire operating system. The MAJR Way MAJR…

Filter Media Options for Shielded Air Filtration Panels

Maintaining operational integrity requires a great deal of planning, research and using reliable products that can perform to demanding industry standards. MAJR’s selection of shielded air filtration panels are available in a variety of different frame and media options to help meet your technical specifications. MAJR is one of the leaders in the EMI shielding…

Waveguide Ventilation Panels from MAJR Products

What is a Honeycomb Waveguide Panel Shielding honeycomb waveguide panels let airflow into and out of an EMI/RFI shielded enclosure. The entering fresh air may be either cooled, heated, or at ambient temperature depending on the shielded enclosure environment and contents. For electronic equipment, the primary reason for airflow is usually to cool electronics; if…

EMI/RFI Connector Gaskets: What, Where and Why, from MAJR Products

When thinking about EMI/RFI connector gaskets, one of the best analogies might be in your own home, with water. Water can be a godsend or a curse. It needs to be contained in your plumbing system which takes it to where it is useful. But a leak within your home or from the outside elements…

EMI Shielding for 5G: It’s a Whole New World

5G (fifth generation) is the newest communication infrastructure and electronic device advancement to enable a multitude of faster, more functional, comprehensive technologies and human services available to everyone. 5G is used with mission critical communications, internet of things (IoT) and mobile broadband telecommunications. 5G Frequencies and Wavelengths The FCC recently granted 280 MHz from 3.70…

Shining a Transparent Light on EMI Shielded Windows

Wherever there is a window in a hardened enclosure, whether it’s in something as small as a handheld device or as large as a shipping container, there is the probability of EMI contamination. EMI shielded windows are designed to solve this problem. They allow for separation between the interior and exterior of a shielded unit…

MAJRabsorber™: The Best High-Frequency RF Absorber Material

MAJRabsorber™: An Innovative RF Absorber Material Electromagnetic interference (EMI) is a major issue anywhere electronic circuits are found. Mitigating factors like increases in device frequency, high integration in electronic systems, higher power densities, and reductions in PCB thickness and size all contribute to EMI. Shielding electronic devices from electromagnetic noise with conductive materials, such as…

How to Use Our EMI/RFI Shielding Design Flow Chart

Once you’ve determined that your systems or components need isolation from surrounding electromagnetic fields, or to block the transmission of additional signals, designing the appropriate enclosure is crucial. Our shielding design flow chart can help designers and engineers navigate the varied types of EMI/RFI shielding materials available to choose the right materials that meet your…

EMI/RFI Shielding For Medical Device Applications

EMI / RFI Shielding For Medical Device Applications Take any average-sized hospital in the U.S. and count the number of electronic devices in use. According to the World Health Organization (WHO), that number averages over 10,000. Imagine all those separate life-saving devices – magnetic resonance imaging (MRI), computed tomography (CT or CAT), Electromyography (EMG) and…

IP Ratings & Conductive Rubber

Conductive rubber in any form helps defense agencies and commercial electronic product industries meet environmental and EMI/RFI emissions requirements, which is crucial to protecting the integrity of susceptible applications like HVAC systems, power and signal panels, door and panel hinges, latches and brackets, floor drains, structure seams and ISO intermodal, container brackets, antenna mounts, cable…

TEMPEST, SCIF, and Electronic Shielded Enclosures

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…

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

In 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…

MAJRabsorber™ Innovation Changes RF Absorber Expectations

Every 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…

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

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…

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

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…

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

The 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…

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

There 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…

A Guide to EMI Shielded Ventilation Panels: Protecting Your 2nd Largest Area of Exposure in a Hardened Enclosures

Think about the need for EMI shielded ventilation panels – what they do and why you need them. Are you fully protecting that hardened enclosure with the right option? Does it measure up to standards for your civilian or military application?

Honeycomb Waveguide Panels

Honeycomb Waveguide – An Attenuation Performance Explanation of a MAJR Products Honeycomb Waveguide Panel due to the Effect of a Waveguide Beyond Cuttoff Principle What is a honeycomb Waveguide panel? A shielding honeycomb waveguide panel is a product that lets air flow into and out of an EMI/RFI shielded enclosure. The entering fresh air may…

Shielding For RF And Microwave Applications

Understanding Shielding for RF and Microwave System Applications Any electronic device emits some level of electromagnetic radiation. Electromagnetic interference (EMI) shielding and radio frequency interference (RFI) shielding products are used when the EMI/RFI of an electronic product or system, in particular high frequency operations, necessitates attenuation of EMI/RFI to a specific level; the attenuation of…

EMI/RFI Wire Mesh Grounding Washers And Conductive Elastomer Washers

EMI/RFI Wire Mesh Grounding Washers And Conductive Elastomer Washers With expertise in EMI/RFI shielding products development to be utilized in military and commercial applications, the engineers at MAJR Products provide EMC compliance and electrical safety grounding equipment. The grounding and conductive washers produced by MAJR Products are designed and manufactured to suit the needs of…

Conductive Rubber – What It Is and Where It’s Used

CONDUCTIVE RUBBER What It Is and Where It’s Used A MAJR Products Corp. Article by Mike Oliver What is Conductive Rubber? Definition: Conductive Rubber is a generic term referring to any rubberized material with conductive properties which reduce or eliminate the EMI/RFI (electromagnetic interference and radio frequency interference) “noise” that is often associated…

EMI / RFI Enclosure Shielding Requiring Military Specifications

With our continued reliance on wireless communications, a designer of an enclosure must ensure that said enclosure is protected from any transmission interference. At MAJR, we have experience designing and engineering EMI / RFI Shielding products for a variety of different enclosures including Sensitive Compartmented Information Facility (SCIF) enclosures. Our products are designed to ensure compliance with standards outlined by the US Military and other entities including TEMPEST and IEEE.