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EMC Engineering Basics
Rating: 4.8 out of 5(349 ratings)
2,572 students

EMC Engineering Basics

Electromagnetic Compatibility is not magic--it's physics and electrical engineering interacting in counterintuitive ways
Created byKaren Burnham
Last updated 1/2025
English

What you'll learn

  • Understand this intersection of physics and electrical engineering
  • Identify potential electromagnetic interference (EMI) issues in a design
  • Troubleshoot common EMC problems
  • Improve EMC regulatory testing success rates

Course content

1 section7 lectures1h 38m total length
  • Introduction13:22

    Introduction to EMC. Examples of EMC failures that explain why there are regulations in place to prevent interference.

  • Cables as Antennas15:12

    We discuss the basics of how dipole antennas radiate, and how cables can become radiating elements.

  • PCB Traces as Antennas18:02

    We learn how conductive loops can form antennas, whether those are PCB traces or cable systems.

  • Slot Antennas in Enclosures10:43

    We show how slot antennas work, and how apertures in enclosures can radiate in the same way.

  • Switching Noise21:36

    All switching operations create high frequency noise, whether from power converters or digital signals. Here we see how square waves we're used to in the time domain create high frequency harmonics in the frequency domain.

  • Hardware demonstration7:39

    This demonstration uses a simple function generator, current probe, and spectrum analyzer to show a cable acting as an antenna and how different functions generate more or less high frequency noise.

  • Conclusion12:15

    To wrap everything up, we look at the main "red flags" to look for in designs.

Requirements

  • Basic knowledge of physic (electromagnetic fields) and electrical engineering (Ohms law and resistors/capacitors/inductors)

Description

EMC Engineering is confusing for many, since it isn't taught in most engineering programs. It's a common cause of late program failures when a piece of hardware fails regulatory testing, so most people encounter it for the first time in the context of getting bad news: "Your product failed EMC testing--go fix it!" This course should be a friendlier introduction to the topic that will give you a starting point for understanding EMC issues, particularly when it comes to radiated emissions and radiated immunity (the most commonly failed EMC tests ).

While EMC overall is a complex topic, there are a few things that cause most of the problems. This course will feature an introduction to EMC--why do we care? We'll talk about how different things can start acting like antennas even though they weren't designed that way. That includes cables, printed circuit boards, and metal enclosures/housings. We'll talk about the most common source of electromagnetic noise. That is the noise associated with switching operations, whether from a PCB clock or a power supply. At the end there will be a benchtop hardware demonstration that illustrates these how these principles work in the real world. At the end of the course you'll be able to evaluate your designs for the most common risk factors that might lead to EMC test failures.

Who this course is for:

  • People involved in hardware development who have already, or may in the future, run into an EMC problem
  • Electrical/mechanical/aerospace engineers, technical managers, technicians