EMI/EMC Shielding Design Workshop

EMI/EMC Shielding Design Workshop

EMI/EMC Shielding Design Workshop is a 2-day course where participants learn the fundamentals of EMI and EMC in electronic systems as well as explore advanced concepts in EMI/EMC shielding design.

Electromagnetic interference (EMI) is a serious and increasing form of environmental pollution.

EMI’s effects range from minor annoyances due to crackles on broadcast reception to potentially fatal accidents due to corruption of safety-critical control systems.

Various forms of electromagnetic interference may cause electrical and electronic malfunctions, can prevent the proper use of the radio frequency spectrum, can ignite flammable or other hazardous atmospheres, and may even have a direct effect on human tissue.

The main purpose of effective EMC (electromagnetic compatibility) shielding is to prevent electromagnetic interference or radio frequency interference (RFI) from impacting sensitive electronics.

This is achieved by using a metallic screen to absorb the electromagnetic interference that is being transmitted through the air. The shield effect is based on a principle used in a Faraday cage – the metallic screen completely surrounds either the sensitive electronics or the transmitting electronics.

The screen absorbs the transmitted signals, and causes a current within the body of the screen. This current is absorbed by a ground connection, or a virtual ground plane.

EMI shielding can be considered the most cost-effective method of EMC compatibility since it decreases the use of intra-equipment devices to manage undesired signals. Achieving EMC through shielding depends on two factors: the structural or form design and the materials used,].

A simple EMI shield design is a Faraday cage made of conductive materials such as copper. The EMI shield design depends on the characteristics of the electromagnetic environment within which the equipment must reliably function.

In general, the structural design of a Faraday cage should be sure that discontinuities are minimized to control leakage of radiated EMI. Additionally:

• Sufficient bonding of enclosures must be created at every seam and discontinuity to have a homogenous conductive surface. There should be metal-to-metal contact done through welding, brazing, or soldering.
• Generally, similar metals are bonded to prevent galvanic corrosion.
• The poorest electrical bond will determine the shielding effectiveness of the enclosure.
• In case permanent bonding is not possible, ensure that the chosen fastening method exerts enough pressure to maintain contact.
• For uneven surfaces, it is best to use an EMI shielding gasket. EMI shielding gaskets are commonly used for enclosures with removable panels, drawers, and covers. The gaskets fill in the gaps to provide continuous electrical contact between surfaces.

EMI shields are available as solid enclosures, wire mesh, screens, gaskets, O-rings, cable shields, and coatings.

It is important to note that the shielding effectiveness of all materials will differ depending on the wavelength of the radiation being blocked. A measurement of shielding effectiveness is only useful if the wavelength at which that measurement was taken is known.

EMI shielding is especially important in military enclosures. EMI shielding prevents external EMI sources from penetrating a sensitive environment containing electronic equipment, which is susceptible to the presence of EMI.

Additionally EMI shielding prevents electromagnetic signals generated by equipment within the facility from being transmitted or conducted in sufficient magnitude to be received by sensitive receiving and signal recovery systems.

EMI/EMC Shielding Design Workshop by Tonex

This comprehensive EMI/EMC Shielding Design Workshop by Tonex equips participants with essential knowledge and practical skills to address electromagnetic interference (EMI) and electromagnetic compatibility (EMC) challenges in electronic systems. Through hands-on exercises and real-world case studies, attendees will gain proficiency in designing effective shielding solutions for various applications.

Tonex’s EMI/EMC Shielding Design Workshop provides a comprehensive training experience for engineers, designers, and professionals in electronic systems development. This workshop covers key aspects of electromagnetic interference (EMI) and electromagnetic compatibility (EMC), offering hands-on exercises and real-world case studies.

Participants will gain proficiency in designing effective shielding solutions, selecting appropriate materials, and ensuring compliance with industry standards. The six modules cover fundamental concepts, advanced techniques, practical applications, case studies, material selection, and regulatory compliance. Whether for beginners or experienced practitioners, this workshop equips attendees with essential skills to address EMI/EMC challenges in diverse electronic applications.

Learning Objectives:

• Understand the fundamentals of EMI and EMC in electronic systems.
• Explore advanced concepts in EMI/EMC shielding design.
• Gain hands-on experience in designing and implementing effective shielding solutions.
• Analyze real-world case studies to identify and mitigate EMI/EMC issues.
• Develop skills in selecting appropriate shielding materials and techniques.
• Acquire knowledge of industry standards and best practices for EMI/EMC compliance.

Audience: Engineers, designers, and professionals involved in the development of electronic systems, including electrical engineers, RF engineers, hardware designers, and project managers. This workshop is suitable for both beginners seeking a foundational understanding and experienced practitioners looking to enhance their skills in EMI/EMC shielding design.

Course Modules:

Module 1: Introduction to EMI/EMC

• • Overview of EMI and its impact on electronic systems
  • Importance of EMC in ensuring system reliability
  • Regulatory requirements and industry standards
  • Basics of electromagnetic fields and their role in EMI
  • Introduction to shielding as a solution
  • Case studies highlighting the consequences of inadequate EMI/EMC measures

Module 2: EMI/EMC Fundamentals

• • Principles of electromagnetic fields and waves
  • Frequency spectrum and its relevance to EMI
  • Common sources of EMI in electronic systems
  • Differentiating between conducted and radiated interference
  • Understanding coupling mechanisms
  • Impact of impedance mismatch on EMI/EMC

Module 3: Shielding Design Techniques

• • Types of shielding and their applications
  • Proper grounding and bonding techniques
  • Design considerations for effective shielding
  • Shielding materials and their properties
  • Evaluation of shielding effectiveness
  • Integration of shielding into the overall system design

Module 4: Case Studies in EMI/EMC

• • Analyzing real-world EMI/EMC challenges in various industries
  • Identifying root causes of EMI issues in specific cases
  • Formulating effective solutions based on case studies
  • Practical problem-solving exercises
  • Learning from successful EMI/EMC mitigation strategies
  • Group discussions on best practices derived from case studies

Module 5: Material Selection for Shielding

• • Overview of common shielding materials (metals, conductive polymers, etc.)
  • Understanding material properties and trade-offs
  • Selection criteria based on application requirements
  • Considerations for thermal management in shielding materials
  • Environmental considerations in material selection
  • Hands-on exercises in working with different shielding materials

Module 6: Standards and Compliance

• • Overview of key EMI/EMC standards (e.g., MIL-STD-461, CISPR, FCC)
  • Importance of compliance in product development
  • Designing for EMC to meet regulatory requirements
  • Testing and measurement techniques for EMI/EMC compliance
  • Case examples of compliance challenges and solutions
  • Incorporating EMI/EMC considerations throughout the product lifecycle