ABSTRACT Our automobiles are becoming more connected and reliant on wireless connectivity, and at the same time, the number of high-compute internal systems is rapidly increasing. Like any high-speed, complex digital electronic system, automotive electronics can be both a cause of, and highly sensitive to, electromagnetic interference (EMI), and the consequences of failure can … [Read more...]
EMC Simulation for Automotive Ethernet
Introduction The increasing use of electronics in vehicles introduces new risks of interference and crosstalk between components. OEMs and government regulators impose strict limits on electromagnetic interference (EMI) and electromagnetic compatibility (EMC), and redesigning a component that fails to meet these standards can be both expensive and time-consuming. This article … [Read more...]
PC Board Design for Wireless Products
INTRODUCTION TO SELF-GENERATED EMI It seems many manufacturers these days are developing products that incorporate wireless technologies—both in new and existing products. Many of these products are using LTE cellular connectivity and designers are finding that the on-board DC-DC converters and processor/memory bus noise are creating enough broadband electromagnetic … [Read more...]
Selection of LC Filters to Ensure HEMP Protection of Electronic Equipment
According to military standards, passive electromagnetic LC filters of HEMP are recommended for use in all kinds of special-purpose electronic equipment. Experience gained by military specialists is usually employed when developing HEMP protection means and measures for civil equipment. Does it make sense to use extremely expensive and bulky HEMP filters for civil equipment? … [Read more...]
Electromagnetic Pulse: The Myths and Reality
Introduction Some 10-15 years ago this topic was irrelevant for the civil sector, and the issue of protection of electrical and electronic equipment from high altitude electromagnetic pulse (HEMP) solely belonged to military specialists. Today, much of the mass media discusses HEMP danger for civil infrastructure at the global level in all possible ways; and thus, this topic … [Read more...]
Flexibility Key to Trends in EMI Pre-Compliance Debugging
EMI analysis continues to expand as more companies add electronic control and wireless remote capabilities to their products. The need to drive speed and efficiency throughout the design process means these engineers need to conduct EMI pre-compliance testing on the same bench as the debugging embedded and RF signals. Modern instruments often combine debugging and … [Read more...]
EMC Test Equipment Selection and Sizing
Explosive growth in technologies like portable electronics, Internet of Things (IoT) devices, and autonomous vehicles has led to a world full of electromagnetic interference. Efficient EMC testing is more critical than ever, and is dependent on high-quality test equipment. Historically, not a lot of education has been provided on the careful considerations needed for … [Read more...]
How to Build Your Own EMI Troubleshooting and Pre-Compliance Kit
Electromagnetic compatibility (EMC) and the related electromagnetic interference (EMI) are some of the obstacles that must be overcome before nearly any electronics product can be brought to market—whether it’s an Industrial Internet of Things (IIoT) device, a consumer electronics product, or military and aerospace equipment. Products must not interfere with one another … [Read more...]
Review of Magnetic Effects Testing—DO-160 Section 15
The Issue From the beginning of aviation, knowledge of the aircraft direction during flight has been critical to locating destinations. The magnetic compass was used for centuries in shipping, and naturally, it was adopted for aircraft use. Without visible signposts or landmarks, direction relies on the compass to provide the necessary information. The compass aligns with the … [Read more...]
Preventing Impact of High-Altitude Electromagnetic Pulse on Power Transformers
Protection of a power system’s electrical equipment from a high-altitude (more than 30 km) nuclear explosion (HEMP) impact is a challenging issue, which until recently has not received proper attention. The fact is that HEMP does not affect people directly, while the electromagnetic pulse resulting from this explosion is a powerful devastating factor for the power grid’s … [Read more...]
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