Electromagnetic Waves 2: Antennas

ISBN-13: 9781789450071 / Angielski / Twarda / 2021 / 272 str.

Favennec

Spis treści

Preface ixChapter 1. General Information on Antennas 1Jean-Pierre BLOT1.1. Definition, context, and regulation 11.1.1. The International Union of Telecommunications and Radio communications (ITU-R) 91.1.2. Frequency bands: uses and classification (see also appendices 3 and 5) 101.1.3. Review of some technologies by frequency bands (see also appendices 3 and 5) 121.2. Propagation and radiation 191.3. Antenna and sensor 201.3.1. Antenna operating in transmission and reception 231.4. Theorems and important principles of electromagnetism 271.4.1. Lorentz reciprocity theorem 271.4.2. Huygens-Fresnel principle 281.4.3. Uniqueness theorem 301.4.4. Image theory 301.4.5. Superposition principle 30Chapter 2. Fundamental Equations Used in Antenna Design 31Jean-Pierre BLOT2.1. Formulations of Maxwell's equations to calculate the radiation of electromagnetic sources 312.1.1. Maxwell's equations 322.1.2. Material media 342.1.3. Vectors D and H 362.1.4. Source currents and induced currents 422.1.5. Integral form of Maxwell's equation 442.2. Boundary conditions between two media 442.3. Vector potential 472.3.1. Propagation equations for the vector potential 502.3.2. Propagation equations for the scalar potential 522.3.3. Vector and scalar potentials in the harmonic regime 532.4. Propagation equation for fields E and H 542.5. Solving the Helmholtz equations for the vector and scalar potentials 552.5.1. Orthogonality of distance fields zone and radiated power; radiation pattern 572.6. Harmonic form of Maxwell's equations 612.7. Physical interpretation of the Poynting theorem 612.7.1. Poynting vector in the time domain 612.7.2. Poynting vector in the frequency domain 642.8. Polarized wave 652.8.1. Definition of a plane wave 652.8.2. Polarizations of a wave 662.9. Calculating the electromagnetic field radiated by an antenna 722.9.1. Expanded discussion of the EFIE and MFIE formulae 722.9.2. Calculations for an elementary dipole 732.10. Aperture antenna 762.10.1. Wireless radiation of apertures 762.10.2. Identification of the different zones 80Chapter 3. Different Antenna Technologies 85Jean-Pierre BLOT3.1. Horns 853.2. Coaxial cables and input guides in antennas 873.2.1. Coaxial cables 893.2.2. Waveguides 913.3. Supply to antennas, reference access, impedance matching and balun 1053.3.1. Supply lines 1053.3.2. Reference access 1053.3.3. Matching networks 1073.3.4. Baluns and symmetrizers 1093.4. Reflector antennas 1103.5. Printed antennas 1153.5.1. Low-bandwidth structures 1163.5.2. High-bandwidth structures, or frequency-independent structures 1213.6. Reference wire antennas 1223.7. Quality factor and frequency bandwidth 1233.7.1. Quality factor 1233.7.2. Frequency bandwidth 1243.8. Miniaturization 125Chapter 4. Characteristic Parameters of an Antenna 131Jean-Pierre BLOT4.1. Characteristic parameters of an antenna 1314.1.1. Capture surfaces or equivalent surfaces on an antenna 1324.1.2. Directivity and gain 1334.1.3. Relation between gain, directivity and radiation pattern 1354.1.4. Effective height or effective length 1364.2. Link budget 1384.3. Power and noise temperature 1404.3.1. Noise temperature received by an antenna 1434.3.2. Link budget and Friis formula 1444.4. Quality factor Q = G/T 145Chapter 5. Digital Methods 149Jean-Pierre BLOT5.1. Introduction to digital methods 1495.1.1. Overview of the main digital methods 1495.1.2. Hybridization of digital methods 1555.1.3. Low-frequency methods 1555.1.4. Introduction to high-frequency methods 1895.2. General remarks on EMC methods 195Appendix 1 197Appendix 2 201Appendix 3 219Appendix 4 227Appendix 5 231List of Acronyms and Constants 233References 235List of Authors 243Index 245

O autorze

Pierre-Noel Favennec is a Doctor of Science, former researcher at France Telecom and former consultant at the Institut Telecom. He is now the Chairman of ArmorScience.