Electromagnetic Interference and Compatibility

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Dr P Anthony Sunny Dayal

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Core Courses

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Course Name : Electromagnetic Interference and Compatibility

Code(Credit) : CUTM1041 (2-0-1)

Course Objectives

  • To familiarize with the fundamentals that are essential for electronics industry in the field of EMI / EMC
  • To understand EMI sources and its measurements
  • To understand the various techniques for electromagnetic compatibility.
  • Acquire broad knowledge of various EM radiation measurement techniques.
  • Model a given electromagnetic environment/system so as to comply with the standards.

Learning Outcomes

  • Designing electronic systems that function without errors or problems related to electromagnetic compatibility.
  • Diagnose and solve basic electromagnetic compatibility problems.
  • Real-world EMC design constraints and make appropriate tradeoffs to achieve the most cost-effective design that meets all requirements.
  • Understand the effect of EM noise in system environment and its sources.
  • Identifying of EMI hotspot and various techniques like Grounding, Filtering, Soldering, etc
  • Concepts of PCB tracing, termination and implementation
  • Understanding about the functions of a ground, understanding about cables and connectors.
  • Understanding the various aspects of shielding.

Course Syllabus

Module I: EMC Fundamentals (3hrs Theory)
Definition of EMI and EMC, Sources and Simulators, Propagation Methods


Module II: Electrical Noise in EMI, EMI analysis and Supression (3hrs Theory)
Basic Aspects of EMI in System Environment, Electrical Noise Sources, Common-Mode and Differential-Mode Currents, Power and/or Return Bounce, Identification of EMI Hot Spot, RF Current Return and Flux Cancellation, Loop Area between Circuit and components, Primary Grounding, Filtering, Shielding


Module III: EMC Standard and EMC Measurements (3hrs Theory)
Overview of EMC Standards, Radiated and Conducted Emission (RE/CE) Standards, Radiated and Conducted Immunity (RI/CI) Standards, Electrostatic Discharge (ESD) Standards, Overview of EMC Measurements, Testing Equipment, Radiated Emission Test Setup, Measurement of Signals and Noise, Interpretation of Measurement Results


Module IV: PCB Trace Routing and Termination (3hrs Theory)
Typical PCB Trace Topologies, Trace Routing Design Guidelines, Routing Differential Pair Signals, Layer Jumping – Use of Vias, Routing over a Split Plane, Fundamental Concepts of Trace Termination, Termination Methodologies and Implementation


Module V: Grounding Technique and Filtering (3hrs Theory)
Types of Grounds, Function of a Ground, Grounds Separation and Isolation, Single-Point, Multi-Point and Hybrid Grounds, Internal Cables and Connectors Grounding, Common-Mode and Differential-Mode Filtering, Basic Filter Component Characteristics, Filtering Guidelines


Module VI: Shielding and Electrical Gaskets (3hrs Theory)
Transmission Line Theory of Shielding, Absorption Loss, Reflection Loss, Shielding Effectiveness, Shielding Materials, Apertures in Shielded Walls, Waveguide below Cut-off, The Need for Gaskets, Common Gaskets Material Use, Properties and Characteristics of RF Gaskets


Module VII: Advanced Topics (3hrs Theory)
EMC/EMI Modelling Techniques and Applications, Virtual EMC Lab, New Radiation Testing Technology – from Near-field Scanning to Far-field Prediction,Novel Radiation Mitigations Design



Projects:
1. Common Impedance Coupling Simulation using CST Studio Suite
2. Lightning Strike Analysis using CST Studio Suite
3. Emissions Simulation via Cascading using CST Studio Suite
4. Electrostatic Discharge using CST Studio Suite
5. Simulating Shielding Effectiveness using CST Studio Suite
6. Simulating Conducted Emissions from a Motor Control using CST Studio Suite
7. Simulating Conducted Emissions from a DC/DC Converter using CST Studio Suite


Text Books:
1. Henry W. Ott, “Electromagnetic Compatibility Engineering”, John Wiley & Sons, 2009
2. V.P. Kodali, “Engineering Electromagnetic Compatibility”, IEEE Publication, S. Chand & Co. Ltd., New Delhi.
3. Ralph Morrison, "Grounding and Shielding: Circuits and Interference”, John Wiley & Sons


Reference:
1. “Electromagnetic Interference and Compatibility”, IMPACT series, IIT-Delhi, Modules1-9.
2. DraganPoljak, "Advanced Modeling in Computational Electromagnetic Compatibility”, John Wiley &Sons.
3. Dipak L. Sengupta and Valdis V. Liepa,"Applied Electromagnetics and Electromagnetic Compatibility”, John Wiley & Sons
4. Charles S. Walker, "Capacitance, Inductance and Crosstalk Analysis”, Artech House, 1990.
5. DANIEL MÅNSSON and RAJEEV THOTTAPPILLIL, "ELECTROMAGNETIC COMPATIBILITY, EMC", NPTEL

6. EMI/EMC Testing, Society of Applied Microwave Electronics Engineering and Research Sameer

Session 5

Basic Aspects of EMI in System Environment,
Electrical Noise Sources,
Common-Mode and Differential-Mode Currents

Click Here for PPT on System Environment
Click Here for PPT on common mode and differential mode

Session 6

Power and/or Return Bounce,
Identification of EMI Hot Spot,

Click Here for PDF

Session 7

RF Current Return and Flux Cancellation, Loop Area between Circuit and components,
Primary Grounding,
Filtering,
Shielding
Click Here for PDF

Click Here to play the video

Session 8

Overview of EMC Standards,
Radiated and Conducted Emission (RE/CE) Standards,
Radiated and Conducted Immunity (RI/CI) Standards,
Electrostatic Discharge (ESD) Standards,

Click Here for PPT

Click Here to play the video

Session 9

Overview of EMC Measurements

Click Here for PPT

Session 10

Testing Equipment,
Radiated Emission Test Setup,
Measurement of Signals and Noise,
Interpretation of Measurement Results

Click Here for PPT

Session 11

Typical PCB Trace Topologies,
Trace Routing Design Guidelines,
Routing Differential Pair Signals,

Click Here for PDF

Click Here to play the video

Session 12

Layer Jumping – Use of Vias,
Routing over a Split Plane,

Click Here for PDF

Session 13

Fundamental Concepts of Trace Termination,
Termination Methodologies and Implementation,

Click Here for PDF

Session 14

Types of Grounds,
Function of a Ground,
Grounds Separation and Isolation,

Click Here to play the video

Click Here for PDF

Session 15

Single-Point, Multi-Point and Hybrid Grounds,
Internal Cables and Connectors Grounding,

Click Here for PDF

Session 16

Common-Mode and Differential-Mode Filtering,
Basic Filter Component Characteristics,
Filtering Guidelines

Click Here to play the video

Session 17

Transmission Line Theory of Shielding,
Absorption Loss, Reflection Loss,
Shielding Effectiveness

Click Here to play the video

Session 18

Shielding Materials, Apertures in Shielded Walls,
Waveguide below Cut-off,

Click Here to play the video

Session 19

The Need for Gaskets,
Common Gaskets Material Use,
Properties and Characteristics of RF Gaskets

Click Here for PDF

Session 20

EMC/EMI Modelling Techniques and Applications,
Virtual EMC Lab,
New Radiation Testing Technology – from Near-field Scanning to Far-field Prediction

Click here for PPT

Session 21

Novel Radiation Mitigations Design

Click Here for PDF

Session 22-35

Project:- measuring and testing a VLSI Board using Conducted Susceptibility (CS), Conducted Emission (CE), Radiated Emission (RE) and Radiated Susceptibility (RS)

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    Dr P Anthony Sunny Dayal

    Associate Professor, Department of Electronics and Communication Engineering, SOET
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    Dr P Anthony Sunny Dayal completed his M.Tech in Radar and Microwave Engineering from Andhra University and Ph.D in Antenna Array Design For Radar And Emc Applications from Centurion University. Recipient of “Young Scientist Award” from His Excellency Shri Biswabhusan Harichandan Governor of Andhra Pradesh, at Andhra Pradesh Science Congress – 2019 by Andhra Pradesh […]