As we progress through the fold of technological developments, be it in commercial products, military advancements, automotive electronics, or any of the other industries where electromagnetic devices are developed, EMI will be present and EMC testing will be required. For those technical personnel who are walking into a laboratory for the first time, learning EMC because … [Read more...]
EMC and EMI Simulation for Launchers and Satellites
By: Yannis Braux and Stephen Murray CST Computer Simulation Technology Introduction EMC and EMI analysis plays an important role in ensuring the correct functioning of electronic systems and guaranteeing reliability throughout their lifetimes. This task is all the more difficult and crucial when the system is complex or exists in a challenging EM environment. This … [Read more...]
A Circuit Theory Approach to Calculating the Attenuation of Shielding Barriers
Abstract There are two commonly used methods for approximating the attenuation of shielding barriers. This approximation is defined as shielding effectiveness (SE) for shielding materials used in the design of shielded enclosures. Both methods use wave theory and quasi-stationary assumptions. One of the methods uses Maxwell’s equations to estimate the shielding, and the other … [Read more...]
How to Choose Particle-Filled Silicones to Meet Multiple Design Requirements
Many electronic designs need shielding materials that combine resistance to electromagnetic interference (EMI) with other application-specific requirements. For example, the EMI gaskets that are used in military touchscreens need to attenuate EMI emissions, provide electrical conductivity, and ensure environmental sealing. These shielding gaskets also must also cushion the unit … [Read more...]
The Future of Shielding
THE FUTURE OF SHIELDING The future is not all that far off. With more electronic devices that are getting smaller, more portable and with continuing faster speeds, EMI or RF issues will continue to increase. There will be more integrated system-onchips (SoCs) where several functions will all be in one device that will need to be electromagnetically isolated. As an example, a … [Read more...]
Introduction to MIL-STD-461G
Where MIL-STD-464C serves as a system/platform level set of requirements, MIL-STD-461G serves as an equipment/subsystem level set of requirements. Similar to MIL-STD-464C, MIL-STD-461G was developed as an “Interface Standard” to allow usage without a waiver. The overall structure of the two documents is also the same in that both have a contractual main body and a very … [Read more...]
Introduction to MIL-STD-464C
Responding to increasing criticism, Secretary of Defense William Perry issued a memorandum in 1994 that effectively eliminated the use of most defense standards. This has become known as the “Perry memo”. Many defense standards were canceled. In their place, the DOD encouraged the use of industry standards for quality assurance. MIL-STD-464 was developed as an “Interface … [Read more...]
Using An Oscilloscope To Verify EMC Tests For Automotive Electronics
Consumer demand for more entertainment, safety, and communication options within automobiles has significantly increased both the density of electronic components and the number of on-board wired and wireless signals. The result: an ever-expanding range of signals contained within the same car-sized fixed space. USING AN OSCILLOSCOPE TO VERIFY EMC TESTS FOR AUTOMOTIVE … [Read more...]
Telecommunication Testing On Relevant RF Components
Introduction The telecom industry has undergone rapid development in the past several decades. Digital communications methods have advanced, requiring increased bandwidth and frequency coverage. This advancement has complicated an RF measurement system’s capability to accurately characterize system components. The 3rd Generation Partnership Project (3GPP) provides modern … [Read more...]
The Internet of Things, Wireless and Security
Summary This article gives an overview of international and domestic efforts to protect our connected world. These efforts will be ongoing in perpetuity as the world becomes more complex, riskier, and increasingly exposed to many varieties of threats. Across the Pond The European Union (and the UK) are actively addressing the security of wireless devices, as outlined … [Read more...]
