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Applied Electromagnetics and Electromagnetic Compatibility. Wiley Series in Microwave and Optical Engineering

  • ID: 2172464
  • Book
  • 486 Pages
  • John Wiley and Sons Ltd
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Tools for understanding and design for EMC

With tighter regulation of electromagnetic emissions, the electronics industry is increasingly looking for professionals with a solid understanding of electromagnetic compatibility (EMC).

The IEEE also encourages engineering schools to include EMC as a course topic. In response to this rising need and demand, the authors have developed a textbook based on their extensive experience in teaching and measurements for EMC compliance.

This textbook skillfully integrates the fundamentals of fields and waves, transmission lines and antennas, and examples in applied electromagnetics, along with a variety of other topics essential to the understanding of EMC. Presentations of electromagnetics are given in the context of EMC; discussions of EMC itself are tailored to assist in analysis and design, as well as planning of measurements for EMC compliance.

Chapter 1 introduces readers to electromagnetic interference and describes the evolution of EMC in the digital electronics era. Following, the authors build on basic concepts and demonstrate their application to the design of electronic devices that perform compatibly in given electromagnetic environments. Topics covered provide a mix of theory and practical problem solving:

  • The Electromagnetic Environment
  • Fundamentals of Fields and Waves
  • Signal Waveform and Spectral Analysis
  • Transmission Lines
  • Antennas and Radiation
  • Behavior of Circuit Components
  • Radiated Emissions and Susceptibility
  • Electromagnetic Shielding
  • Coupling Between Devices
  • Electrostatic Discharge
  • EMC Standards
  • Measurement of Emissions

Most chapters conclude with problem sets that test readers′ knowledge and ensure that they have mastered the key concepts. References provided with each chapter enable readers to explore specific topics in greater depth.

This textbook is recommended for senior undergraduate and graduate courses. Additionally, it is an excellent reference for basic electromagnetics and EMC.

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1 General Considerations.
1.1 Introduction.
1.2 Definitions.
1.3 Interference mechanisms.
1.4 Examples.
1.5 Discussion.

The Electromagnetic Environment.
2.1 Introduction.
2.2 Natural Noise.
2.3 Man–Made Noise.
2.4 CW and Transient Sources.
2.5 Characteristic Parameters of Authorized Radiators.
2.6 Noise Emission Intensity.
2.7 Home Environment.
2.8 Discussion of Noise Sources.
2.9 Subject Matter of the Book.

3 Fundamentals of Fields and Waves.
3.1 Introduction.
3.2 Basic Parameters.
3.3 Time Dependent Relations.
3.3.1 Continuity of Current and Conservation of Charge.
3.3.2 Faraday′s Law.
3.3.3 Ampere′s Circuital Law.
3.3.4 Lorentz Force Law.
3.3.5 Maxwell′s Equations.
3.3.6 Historical Commt:nts on Maxwell′s Equations.
3.3.7 Media Considerations.
3.3.8 Boundary Conditions.
3.3.9 Energy Flow and Poynting′s Theorem.
3.3.10 Uniqueness Theorem.
3.4 Harmonically Oscillating Fields.
3.4.1 Introduction.
3.4.2 Phasors.
3.4.3 Time Harmonic Relations.
3.4.4 Complex Permittivity.
3.4.5 Boundary Conditions Again.
3.4.6 Notes on the Solution.
3.4.7 The Complex Poynting Theorem.
3.5 The Wave Equation.
3.5.1 Time Dependent Case.
3.5.2 Time Hannonic Case.
3.6 Uniform Plane Waves.
3.6.1 General Considerations.
3.6.2 Energy Considerations.
3.6.3 Group Velocity.
3.6.4 Summary.
3.6.5 General Representation of TEM Waves.
3.6.6 Plane Waves in Lossy Media.
3.6.7 Skin Effect.
3.6.8 Polarization of Plane Waves.
3.7 Reflection and Refraction (Transmission) of Plane Waves.
3.7.1 Normal Incidence on a Plane Interface.
3.7.2 Oblique Incidence.

4 Signal Waveform and Spectral Analysis.
4.1 Introduction.
4.2 Classification of Signals.
4.3 Energy Signals.
4.3.1 Definitions.
4.3.2 A Rectangular Pulse.
4.4 Power Signals.
4.4.1 Periodic Signals.
4.4.2 Trapezoidal Waveform.
4.5 Examples of Some Signals.

Transmission Lines.
5.1 Introduction.
5.2 Basic Discussion.
5.3 Transverse Electromagnetic (TEM) Transmission Lines.
5.4 Telegrapher′s Equations: Quasi–Lumped Circuit Model.
5.5 Wave Equations.
5.6 Frequency Domain Analysis.
5.6.1 General Solution.
5.6.2 Further Discussion of Propagation Constant and Characteristic Impedance.
5.6.3 Voltage, Current, and Impedance Relations.
5.7 Line Parameters.
5.7.1 Coaxial Line.
5.7.2 Parallel Wire Line.
5.7.3 Parallel Plate Line.
5.7.4 Circular Wire above a Ground Plane..
5.7.5 Microstrip Line.
5.7.6 Stripline.
5.8 Transients on Transmission Lines.
5.8.1 Initial and Final (Steady State) Values.
5.8.2 Transient Values.
5.9 Measurements.
5.9.1 Slotted Line Measurements.
5.9.2 Network Analyzer Measurement.

6 Antennas and Radiation.
6.1 Introduction.
6.2 Potential Functions.
6.3 Radiation from a Short Current Element.
6.3.1 Complete Fields.
6.3.2 Near Zone and Far Zone Considerations.
6.3.3 Near Zone and Far Zone Fields.
6.3.4 Radiated Power and Radiation Pattern.
6.3.5 Wave Impedance.
6.4 Radiation from a Small Loop of Current.
6.4.1 Complete Fields.
6.4.2 Far Zone Fields.
6.4.3 Radiated Power.
6.4.4 Wave Impedance.
6.5 Fundamental Antenna Pal–ameters.
6.5.1 Radiation Intensity.
6.5.2 Directivity and Gain.
6.6 Far Fields of Arbitrary Current Distributions.
6.6.1 The Radiation Vector and the Far Fields.
6.6.2 Vector Effective Length of an Antenna.
6.6.3 Summary.
6.7 Linear Antennas.
6.7.1 Center–Fed Linear Antenna.
6.7.2 Far Fields of a Dipole of Length.
6.7.3 Radiated Power and Directivity.
6.7.4 Cosine, Sine, and Modified Cosine Integrals.
6.7.5 The Half–Wave Dipole.
6.8 Near Field and Far Field Regions.
6.8.1 Basic Assumptions.
6.8.2 Point or Small Sources.
6.8.3 Extended Sources.
6.8.4 Definitions of Various Regions.
6.8.5 Specific Values of the Region Boundaries.
6.9 Equivalent Circuits of Antennas.
6.9.1 Transmitting Antenna.
6.9.2 Receiving Antennas.
6.9.3 Equivalent Area.
6.10 Antenna Arrays.
6.10.1 General Considerations.
6.10.2 A Two–Element Array.
6.1 1 Antennas Above Ground.
6.1 1.1 Ground and Ground Plane.
6.1 1.2 Image Theory.
6.11.3 Images of Electric Current Elements above Perfect Ground.
6.1 1.4 Dipoles above Ground.
6.1 1.5 Monopole Antennas.
6.12 Biconical Antenna.
6.12.1 Biconical Transmission Line.
6.12.2 Finite Biconical Antenna.

Behavior of Circuit Components.
7.1 Introduction.
7.2 The Series RLC Circuit.
7.3 Definitions of Lumped Circuit Paranleters
L, and
7.3.1 Circuit Theory Description.
7.3.2 Field Theory Description.
7.4 Round Wires.
7.4.1 Resistance.
7.4.2 Internal Inductance.
7.5 External Inductance of Round Wire Configurations.
7.5.1 General Relations.
7.5.2 Circular Loops.
7.6 Inductance of Straight Wires.
7.6.1 Partial Inductance.
7.6.2 Inductance of a Closed Rectangular Loop.
7.7 Other Configurations.
7.7.1 Printed Circuit Board (PCB) Lines.
7.7.2 Microstrip, Strip, and Coplanar Lines.
7.8 Behavior of Circuit Elements.
7.8.1 Bode Plots.
7.8.2 Resistors.
7.8.3 Capacitors.
7.8.4 Inductors.

8 Radiated Emissions and Susceptibility.
8.1 Introduction.
8.2 Main Requirements.
8.3 Emissions from Linear Elements.
8.4 Two Parallel Currents.
8.4.1 Introduction.
8.4.2 Two Parallel Currents.
8.5 Transmission Line Models for Susceptibility.
8.5.1 Introduction.
8.5.2 Voltage Induced on the Two–Wire Transmission Line .

9 Electromagnetic Shielding.
9.1 Introduction.
9.2 Definitions.
9.3 Shielding Effectiveness.
9.3.1 Introduction.
9.3.2 SE Expressions for Computation.
9.4 Shielding Effectiveness: Near Field llluniination.
9.4.1 Electric and Magnetic Sources.
9.4.2 SE Expressions: Near Zone Considerations.
9.5 Discussion.
9.5.1 Far Zone Fields.
9.5.2 Near Zone Fields.

10 Coupling between Devices.
10.1 Introduction.
10.2 Capacitive (Electric) Coupling.
10.3 Magnetic (Inductive) Coupling.
10.3.1 Some Basic Concepts.
10.3.2 Shielding of the Receptor Conductor

11 Electrostatic Discharge (ESD).
1 1.1 Introduction.
11.2 Accumulation of Static Charge on Bodies.
1 1.3 Charging and Charge Separation.
1 1.4 Human Body as Source of ESD.
1 1.5 ESD Waveforms.
1 1.6 Human Body Circuit Model.
1 1.7 ESD Generator and ESD Test.

12 EMC Standards.
12.1 Introduction.
12.2 Current US Standards.
12.2.1 Introduction.
12.2.2 FCC Radiated Emission Limits for Digital Devices.
12.2.3 FCC Conducted Emission Limits for Digital Devices.
12.3 EMIIEMC Standards: Non–US Countries.
12.3.1 CISPR Standards.
12.3.2 European Norms..

13 Measurements of Emission.
13.1 Introduction.
13.2 General.
13.3 Radiated Emissions.
13.3.1 Introduction.
13.3.2 Receiver.
13.3.3 Antennas.
13.3.4 Some Results.
13.4 Conducted Emissions.
13.4.1 Introduction.
13.4.2 Noise on Power Supply Lines.
13.4.3 Transients on Power Supply Lines.
13.4.4 Conducted Emissions from a DUT.
13.4.5 Some Results.

Appendix A: Vectors and Vector Analysis.

1 Introduction.
A.2 Definitions of Scalar and Vector Fields.
A.2.1 Scalar Fields.
A.2.2 Vector Fields.
A.3 Vector Algebra.
A.3.1 Definitions.
A.3.2 Addition and Subtraction of Vectors.
A.3.3 Multiplication of a Vector by a Scalar Quantity.
A.3.4 Unit Vectors.
A.3.5 Vector Displacement and Components of a Vector.
A.4 Vector Surface Element.
A.5 Product of Vectors.
A.5.1 Dot Product of Two Vectors.
A.5.2 The Cross Product of Two Vectors.
A.5.3 Product of Three Vectors.
A.6 Coordinate Systems.
A.6.1 Three Basic Coordinate Systems.
A.6.2 Space Variables and Base Vectors.
A.7 Elementary Differential Relations.
A.7.1 Rectangular System.
A.7.2 Cylindrical and Spherical Systems.
A.8 Transformation of Unit Vectors.
A.9 Vector Calculus.
A.9.1 Time Derivative of Vector A.
A.9.2 Space Derivatives of a Vector A.
A.9.3 Gradient of a Scalar Function.
A.9.4 Flux of a Vector.
A.9.5 Divergence of a Vector A.
A.9.6 Curl of a Vector Function.

10 The Laplacian V2 = V V.

1 1 Comments on Notation.

12 Some Useful Relations.
A.12.1 Vector Algebra.

12.2 Vector Identities.

12.3 Integral Relations.

Appendix B: Frequency Band Designations.

Appendix C: Constitutive Relations.

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Dipak L. Sengupta
Valdis V. Liepa
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