Magnetic Shielding Theory + Design

  • Definitions

    Key concepts and terms for understanding and designing magnetic shielding.

  • Performance Parameters

    Optimize your magnetic shield design through key parameters such as geometry and magnetic continuity.

  • Formulas & Calculations

    Estimate the efficiency of your design to reach your desired field reduction.

  • Shielding Materials

    Compare key material properties to tailor your shield to your application.

  • Hydrogen Annealing

    The final and critical step in optimizing your shielding properties.


Designing and fabricating high-performance magnetic shields begins with understanding the mechanics behind shielding theory.

Even though they cannot be seen or measured directly, magnetic fields exist everywhere. They are invisible fields created anywhere that there is an (AC) electric current such as power cords, power lines, transformers, motors, superconducting magnets, and power supplies. Magnetic fields are also created by (DC) power sources, permanent magnets, and the earth’s molten iron core.

Magnetic fields cause a compass to point north and allow us to communicate with people around the world. In certain cases, however, these fields interfere with the operation and accuracy of electronic components and equipment. Magnetic shielding ensures that these sensitive pieces of equipment operate properly.

While the strategies are different, we are able to shield both AC and DC magnetic interference using specially processed magnetic shielding materials. These materials can be designed and fabricated into the optimum magnetic shield with the application of some basic magnetic principles and an understanding of the environment in which the shields will be used.

We bring over 50 years of practical experience to the design and engineering of the optimum magnetic shield for each unique application. While we routinely employ our 3-dimensional engineering and modeling capabilities, our technical staff enjoys working with our Clients to collaborate on designing the most cost-effective shielding solution for each application.