Electromagnetic field measurements in the near field

Preface ix Chapter 1 Introduction 1 1.1 Bibliography 10 Chapter 2 The Principles of Near-Field EMF Measurements 13 2.1 An EMF generated by a system of currents 13 2.2 The far field and the near field 17 2.3 EMF from simple radiating structures 22 2.4 Bibliography 28 Chapter 3 EMF Measurement Methods 29 3.1 E, H and S measurement 30 3.2 Temperature rise measurements 36 3.3 Current measurements 41 3.4 Bibliography 45 Chapter 4 Electric Field Measurement 47 4.1 Field averaging by a measuring antenna 49 4.2 Influence of fields from beyond a probe measuring band 52 4.3 Mutual interaction of hte measuring antenna and the field source 64 4.4 Changes for the probe's directional pattern 69 4.5 The E-field probe comparison 77 4.6 Comments and conclusions 82 4.7 Bibliography 85 V1 Chapter 5 Magnetic Field Measurement 87 5.1 Measuring antenna size 87 5.2 Frequency response of the magnetic field probe... 90 5.3 Directional pattern alternations 94 5.4 Accuracy of measurement versus distance of the antenna to the source of radiation 98 5.5 The magnetic field probe with a loop working above its self-resonant frequency 104 5.6 Comments and conclusions 109 5.7 Bibliography 112 Chapter 6 Power Density Measurement 113 6.1 Power density measurement methods 113 6.2 Power density measurement using the antenna effect 124 6.3 Conclusions and comments 132 6.4 Bibliography 136 Chapter 7 Directional Pattern Synthesis 137 7.1 A probe composed of linearly dependent elements 138 7.2 Spherical radiation pattern of an E/H probe 142 7.3 A probe composed of three mutually perpendicular dipoles 146 7.4 Comments and conclusions 153 7.5 Bibliography 156 Chapter 8 Other Factors Limiting Measurement Accuracy 159 8.1 Thermal stability of a field meter 159 8.2 The dynamic characteristics of the detector 167 8.3 Measured field deformations 171 8.4 Susceptibility of the meter to external EMF 172 8.5 Resonant phenomena 175 8.6 Bibliography 179 Chapter 9 Photonic EMF Measurements 181 9.1 The photonic EMF probe 186 9.2 Frequency response of the probe 189 9.3 Sensitivity of the photonic probe 195 9.4 Linearity of the detector 199 9.5 Synthesis of the spherical directional pattern ....201 9.6 The future meter 203 9.7 Bibliography 206 Chapter 10 Final Comments 209 Index 217