April 13, 2020
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 specific shielding and environmental requirements.
From Table 1, first identify the intended environment: indoor, outdoor, or both.
Next, select the NEMA or IP enclosure type: commercial, military, marine, land or desert. Or for indoor applications, warehouse or office.
IP ratings classify the degrees of protection against the ingress ... Read more
March 23, 2020
MAJR Products Corporation is currently operating normally and will remain open for business during our standard business hours. Under the guidelines set forth by the Under Secretary of the Defense MAJR is classified as part of the Defense Industrial Base (DIB) and are considered a supplier of critical components to the Defense and Aerospace industries. Because of this classification MAJR Products is exempt from the mandatory shutdown put in to effect by the Governor of Pennsylvania.
As the coronavirus pandemic continues to develop we are taking great measures to insure the health and safety of our employees are not compromised ... Read more
March 16, 2020
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 others working side-by-side without interference.
Unfortunately, many of these devices have non-conductive, plastic
components that don’t shield Electromagnetic Interference/Radio Frequency
Interference (EMI/RFI) from being emitted from or penetrating to other devices.
They require shielding systems incorporated into the design and manufacture,
ensuring reliable performance. According to medical device engineers, due to
their design and ... Read more
February 12, 2020
chance of a direct military attack on America from a foreign country is very
slim. However, as we’ve seen from 9/11 and other terrorist attacks on our soil,
the chance of a smaller and more terroristic threat is still very real. One of
those types of attack is from a High-Altitude Electromagnetic Pulse (HEMP),
which is the dispersal of a nuclear explosion of electromagnetic energy
produced in the atmosphere by the power and radiation of a nuclear explosion,
whose damage to electronic equipment would be felt over a very wide area.
According to the U.S. Congressional Research Service: “Several nations, including reported sponsors of terrorism, ... Read more
December 23, 2019
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 and connector panels, and structural bolts.
Conductive rubber is designed to meet shielding requirements in a variety of indoor and outdoor environments including:
Conductive rubber comes in a variety of material types. There are three that are most commonly used: Conductive Silicone, Multicon, and Radthin. The type ... Read more
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.
Figure 1 – Electric and Magnetic Field(courtesy of HyperPhysics)
Figure 2 – Shielded Electronic Enclosures(courtesy of Milium Textiles and Vertex Structures)
Figure 3 ... Read more
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:
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:
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
July 12, 2019
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.
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
June 8, 2019
The 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
December 17, 2018
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 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