Electromagnetic Shielding Optimization for Enclosures

February 15, 2023 Matthias Laurich

Proper electromagnetic (EM) shielding is often essential for electronics products to successfully comply with electromagnetic compatibility (EMC) standards.

Enclosures are one of the most common approaches towards preventing radiated electromagnetic interference (EMI) that would cause test failures. However, not all enclosures are created equally. Ventilation holes, slots, cables, and gaskets can negatively impact the shielding performance of enclosures. This becomes a balancing act between meeting system requirements (e.g. temperature mitigation) and complying with regulatory EMC limits.

This video will demonstrate how leveraging Ansys simulation tools provides a clear picture of your enclosure’s EM shielding effectiveness. 

An ideal enclosure can block unwanted RF signals both entering and/or leaving the equipment under testing (EUT). Using an incident wave excitation within Ansys HFSS, you can visualize and quantify the shielding effectiveness and likelihood of success against radiated immunity regulatory testing. Similarly, by leveraging a wide-band antenna from the Ansys HFSS Antenna Toolkit, you can rapidly evaluate our enclosure’s suppression of EMI radiating off your EUT. HFSS’s built-in Optimetrics tool enables one to create parametric analysis sweeps around enclosure “imperfections” (slots, holes, gaps, etc.) to find the best tradeoff while meeting other system requirements.

Who will benefit from watching this video?

  • Electrical/EMC engineers
  • Mechanical designers
  • Enclosure manufacturers

What will you learn about?

  • How Ansys HFSS can be used to simulate an EMI source within an imported enclosure.
  • Viewing the electromagnetic fields and how imperfections impact the enclosure’s shielding performance.
  • Utilizing EMA 3D for enclosure and cable shielding performance.

If you're interested in learning more about how the Rand SIM Electromagnetics Team can help make sure to Contact Us.


About the Author

Matthias Laurich

As the Manager of Rand Simulation’s Electronics Team, Matthias works with customers to achieve their goals through identifying critical needs and delivering the correct solutions through simulation. Prior to Rand Simulation, he was a Sr. RF Engineer helping customers across all industries solve their RF and EMI related problems. His consulting background and EMC knowledge has assisted many clients overcome significant EMI failures and gotten them back on the right track in their development. Matthias has a MSEE degree from the University of Minnesota with a focus on antenna design, power electronics, and sustainable energy systems.

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