Advanced materials for electromagnetic shielding : fundamentals, properties, and applications /: fundamentals, properties, and applications. (2018)

• Record Type: Book
• Further Information: Note: Edited by Maciej Wladyslaw Jaroszewski, Sabu Thomas, Ajay V. Rane.
• Editors: Jaroszewski, Maciej Wladyslaw, 1966-; Thomas, Sabu; Rane, Ajay V, 1987-
• Contents: List of Contributors xv 1 EMI Shielding Fundamentals 1; M. K. Aswathi, Ajay V. Rane, A. R. Ajitha, Sabu Thomas, and Maciej Jaroszewski 1.1 Fundamentals of EMI Shielding Theory 1 1.2 Materials for EMI Shielding 3 1.3 Mechanism of EM Shielding Materials 3 References 8 2 EM Noise and Its Impact on Human Health and Safety 11; Halina Aniołczyk 2.1 Introduction 11 2.2 Impact of Non‐ionizing EMFs on Humans 13 2.3 Overview of Most Common Sources of EMFs in the Occupational and Residential Modern Human Environment 16 2.4 Protection Against EMFs in European and International Law 19 2.5 Assessment of the Level of EMFs in the Workplaces 22 2.6 Assessment of EMF Levels in Inhabited Area 25 2.7 Assessment of the Level of EMF From Hi‐tech Equipment for Personal Use 26 2.8 Needs and Possibilities of Shielding to Reduce the Exposure to EMF 29 2.9 Summary 30 References 31 3 Electromagnetic Field Sensors 35; Vishnu Priya Murali, Jickson Joseph, and Kostya (Ken) Ostrikov 3.1 Introduction 36 3.2 How are EMFs Produced? 36 3.2.1 Natural Sources 37 3.2.2 Man‐Made Sources 37 3.2.2.1 Low‐Frequency EMF Sources 37 3.2.2.2 High‐Frequency EMF Sources 38 3.3 Electromagnetic Field Measurements 38 3.3.1 Magnetic Field Measurement Techniques 38 3.3.1.1 Induction Based Sensors 39 3.3.1.2 Fluxgate Sensors 42 3.3.1.3 SQUID Magnetometer 44 3.3.1.4 Hall Probes 46 3.3.1.5 Magneto‐Resistors 47 3.3.1.6 Scalar Magnetometers 49 3.3.2 Electric Field Measurements 51 3.3.2.1 Electric Field Probes 51 3.3.2.2 Electron Drift Instrument 53 3.3.3 Power Density Measurements 55 3.4 Conclusion 56 References 56 4 Shielding Efficiency Measuring Methods and Systems 61; Saju Daniel and Sabu Thomas 4.1 Introduction 62 4.1.1 Mechanism of Shielding 62 4.1.2 Shielding Effectiveness 62 4.1.2.1 Absorption Loss 64 4.1.2.2 Reflection Loss 64 4.1.2.3 Multiple Reflection Correction Factor 65 4.2 Calculation of Electromagnetic Shielding Effectiveness 65 4.2.1 Calculation of SE of a Material by Using Plane Wave Theory 65 4.2.2 Calculation of SE of a Metal Foil 66 4.2.3 Calculation of SE for Near Field Shielding 67 4.2.4 Calculation of SE for Shielding a Low‐Frequency Magnetic Field Source 67 4.2.5 Calculation of Shielding Effectiveness from Scattering Parameters 67 4.3 Effect of Various Parameters on Electromagnetic Shielding Effectiveness 69 4.4 Types of EMI Shielding Effectiveness Tests 71 4.4.1 Open Field or Free Space Test 71 4.4.2 Shielded Box Test 71 4.4.3 Coaxial Transmission Line Test 72 4.4.4 Shielded Room Test 73 4.5 Shielding Effectiveness Measurement Methods and Systems 73 4.5.1 Test Methods Using Plaque Measurements 74 4.5.1.1 Testing Methods Based on MIL‐STD‐285T 74 4.5.1.2 Modified Radiation Method for Shielding Effectiveness Testing Based on MIL‐G83528 75 4.5.1.3 Dual Mode Stirred Chamber 76 4.5.1.4 Apertured Transverse Electromagnetic (TEM) Cell in a Reverberating Chamber 77 4.5.1.5 Dual TEM Cell Method 77 4.5.1.6 Split TEM Cell 78 4.5.1.7 ASTM ES‐7 Dual Chamber Test Fixture 78 4.5.1.8 ASTM ES‐7 Coaxial Transmission Line 78 4.5.1.9 ASTM D 4935 Circular Coaxial Transmission Line Holder 79 4.5.1.10 Enclosure Measurement Techniques 81 4.5.1.11 Injection Molded Enclosure Test Method 81 4.5.1.12 IEEE‐STD‐299 81 4.5.2 Free Space Methods 82 4.5.2.1 Free‐Space Measurement Techniques in the Frequency Domain 82 4.5.2.2 Free‐Space Measurement Techniques in the Time Domain 83 4.6 Transfer Impedance of Coaxial Cable 84 4.6.1 Measurement of Transfer Impedance of Coaxial Cable 84 4.7 Measurement of Transfer Impedance of Conductive Gasket 85 4.8 Summary 86 References 86 5 Electrical Characterization of Shielding Materials 89; B. J. Madhu 5.1 Introduction 89 5.2 Basics of Electrostatics 89 5.2.1 Electrostatic Field 89 5.2.2 Electrical Potential Energy 91 5.2.3 Electric Potential and Electric Field Strength 92 5.3 Electrical Conductivity 93 5.3.1 Current and Current Density 93 5.3.2 Resistivity 94 5.3.3 DC Conductivity 95 5.3.4 AC Conductivity 97 5.4 Electric Fields in Materials 98 5.4.1 Dielectrics 98 5.4.2 Polarization 98 5.5 Dielectric Properties 101 5.5.1 Static Dielectric Constant 101 5.5.2 Complex Dielectric Constant and Dielectric Losses 102 5.6 Electromagnetic Interference Shielding Materials 103 5.6.1 Electromagnetic Interference Shielding 103 5.6.2 Conductive Shielding Materials 104 5.6.3 Dielectric Shielding Materials 105 References 105 6 Magnetic Field Shielding 109; Qiang Zhang 6.1 Introduction 109 6.2 Theories of Magnetic Field Shielding 110 6.2.1 Magnetic Field 110 6.2.2 Magnetic Circuit and Magnetic Reluctance 111 6.2.3 Shielding of Magnetic Field 112 6.2.3.1 Shielding of High Frequency Magnetic Field 112 6.2.3.2 Shielding of Low Frequency or Static Magnetic Field 112 6.2.4 Design of Multilayer Shielding 114 6.2.4.1 Case (a) 115 6.2.4.2 Case (b) 115 6.2.5 Design of Magnetic Shielding Room 116 6.3 Standard Shielding Materials 116 6.3.1 Basic Magnetic Parameters 116 6.3.2 Metallic and Ferromagnetic Materials 118 6.3.3 Ferrite Materials 119 6.3.4 Superconducting Materials 120 6.3.5 Amorphous and Nanocrystalline Alloys 120 6.4 Multilayer Ferromagnetic Matrix Composite Materials 121 6.4.1 Fe–Ni Alloy/Fe/Fe–Ni Alloy Multilayer Composite 122 6.4.1.1 Fabrication 122 6.4.1.2 Microstructure Characterization 122 6.4.1.3 Geomagnetic Shielding Property: Experiment and Calculation 122 6.4.1.4 Shielding Mechanism 128 6.4.2 Fe–Al Alloy/Fe/Fe–Al Alloy Multilayer Composite 128 6.4.2.1 Fabrication 128 6.4.2.2 Microstructure Characterization 129 6.4.2.3 Geomagnetic Shielding Property: Experiment and Calculation 130 6.4.2.4 Shielding Mechanism 134 6.5 Sandwich Composite/Structure Shielding System 134 6.5.1 Fe/Fe‐Al Alloy/Fe Sandwich Composite 135 6.5.1.1 Fabrication 135 6.5.1.2 Microstructure Characterization 135 6.5.1.3 Magnetic Shielding Property 136 6.5.1.4 Shielding Mechanism 140 6.5.2 Composite/Polyester/Composite Sandwich Structure 141 6.5.2.1 Fabrication 141 6.5.2.2 Geomagnetic Shielding Property 141 6.5.2.3 Shielding Mechanism 143 6.6 Summary 143 References 144 7 Recent Progress in Electromagnetic Absorbing Materials 147; Raghvendra Kumar Mishra, Aastha Dutta, Priyanka Mishra, and Sabu Thomas 7.1 Introduction 147 7.1.1 Electromagnetic Wave Absorbing Materials 149 7.2 Core– Shell Structured Electromagnetic Absorbing Materials 151 7.3 CNM‐ Based Electromagnetic Absorbing Material 153 7.3.1 Carbon Nanotubes/Polymer Nanocomposites for Electromagnetic Shielding 154 7.3.2 Carbon Nanofiber Based EMI Shielding Materials 156 7.4 Graphene Based Polymer Composites for EMI Shielding 158 7.5 Challenges and Prospect 160 References 160 8 Flexible and Transparent EMI Shielding Materials 167; Bishakha Ray, Saurabh Parmar, and Suwarna Datar
• Edition: 1st
• Publisher Details: Hoboken, New Jersey : John Wiley & Sons, Inc
• Publication Date: 2018
• Extent: 1 online resource
• Subjects: 621.381; Shielding (Electricity)
• Languages: English
• ISBNs: 9781119128632; 9781119128649
• Related ISBNs: 9781119128618
• Notes: Note: Description based on CIP data; resource not viewed.
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