Fundamentals of Shielding Design for EMC Compliance

It is important for electronic and hardware engineers to not only be knowledgeable of a product's intended function and performance, but also its ability to perform within electromagnetic compatibility (EMC) limits. This seminar introduces practical shielding theory, design fundamentals, and configurations, including shielding products, common and differential modes, electromagnetic fields, and enclosure shielding. A segment on enclosure testing is presented in conjunction with an aperture attenuation modeling program (which is used to model attenuation characteristics at various frequencies and aperture size prior to expensive FCC/CE compliance or MIL-STD 461 testing). Honeycomb vent panels, plating attenuation comparisons, and galvanic compatibility per MIL-STD 1250 will also be discussed. Although the concepts presented in this seminar may be applicable to the automotive industry, the examples and standards presented are primarily focused on military and commercial vehicle applications.

What Will You Learn

By attending this seminar, you will be able to:
  • Identify the basic characteristics of Common and Differential Mode
  • Recognize E,H, and Plane wave fields, Surface current and "Skin effect" based on increased frequency
  • Specify Galvanic compatibility of various metal plating
  • Specify industry standard shielding products for EMC compliance
  • Evaluate waveguide effect of EMI/RFI shielded honeycomb ventilation panels
  • Analyze aperture attenuation modeling for EMC design

Is This Course For You

This seminar will benefit engineers requiring an understanding of their electronic product or system's electromagnetic impact on meeting commercial EMC and MIL-STD 461 requirements, as well as those engineers needing to incorporate shielding products into new or current product improvement designs.

Materials Provided

This data is not available at this time

Course Requirements

This data is not available at this time

Topics

  • EMC Fundamentals
    • Definitions
    • Maxwell equations
    • EMI and apertures
    • EMI environment and characteristics
  • Practical Shielding Theory
    • Common / Differential modes
    • BLS Crosstalk / Radiated fields
    • Reciprocity
    • Emitter location effects
    • Partial shields
    • H, E, and PW fields
    • Shielding material testing
    • Absorption and reflection
  • Shield Apertures
    • Skin depth
    • EM Leakage
    • Aperture calculation
    • Multiple apertures
    • RF current flow
  • Aperture Attenuation Modeling Program
    • Aperture Calculations
    • PCB test data comparisons
    • Attenuation Modeling and Test Factor
  • Honeycomb Vent Panels
    • Design - waveguide effect
    • Attenuation of various panels
    • Galvanic compatibility
  • EMC Shielding Products and Materials
    • Board Level Shields (BLS)
    • Gaskets (BeCu fingerstock, conductive fabric, conductive elastomer, wire mesh)
    • Ferrites Materials
    • RF Absorber
    • Shielding principles
  • EMC Shielding Specifications and Applications
    • MIL-STD 461 / 464 test specifications
    • Shielding applications
  • Question/Answer Session
    • Learning assessment
    • Group discussion on specific EMC design concerns and applications