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Informationen zum Autor DAVID J. DANIELS, BSC, MSC, CENG, FIET, SMIEE, is the Chief Consultant for Sensors at Cobham Technical Services (formerly known as ERA Technology). David has more than thirty years of experience in the development of radar, acoustic, and electromagnetic systems as well as products for security, sensing, and test applications for the military and commercial enterprises. He has brought such products to market as acoustic detection systems, fiber optic cryogenic liquid leak sensors, marine radar rescue transponders, ultra-wideband microwave amplifiers, ground-penetrating radar, land-mine detectors, and RF and microwave security systems. His current interests center on sensor systems for land-mine detection, homeland security, and military counterterrorist activities. Klappentext The latest EM techniques for detecting concealed targets, whether explosives, weapons, or peopleExtensively illustrated from basic principles to system design, the fundamental concepts of RF, microwave, millimeter wave, and terahertz detection systems and techniques to find concealed targets are explained in this publication. These concealed targets may be explosive devices or weapons, which can be buried in the ground, concealed in building structures, hidden under clothing, or inside luggage. Concealed targets may also be people who are stowaways or victims of an avalanche or earthquake.Although much information is available in conference proceedings and professional society publications, this book brings all the relevant information in a single, expertly written and organized volume.Readers gain an understanding of the physics underlying electromagnetic (EM) detection methods, as well as the factors that affect the performance of EM detection equipment, helping them choose the right type of equipment and techniques to meet the demands of particular tasks. Among the topics covered are:* Ultra-wideband radar and ground-penetrating radar* Millimeter, sub-millimeter, and terahertz systems* Radar systems including Doppler, harmonic, impulse, FMCW, and holographic* Radiometric systems* Nuclear quadrupole resonance systemsAuthor David Daniels has many years of experience designing and deploying EM systems to detect concealed targets. As a result, this publication is essential for scientists and engineers who are developing or using EM equipment and techniques for a diverse range of purposes, including homeland security, crime prevention, or the detection of persons. Zusammenfassung * This book provides an introduction and reference to the methods of concealed target detection, which have significant application in the field of homeland security. * Offers an up-to-date and comprehensive reference to the topic of concealed target detection. * The book is accompanied by a CD. Inhaltsverzeichnis Preface xi Acknowledgments xiii List of Frequently used Acronyms xv 1 Introduction 1 1.1 Scope and Objectives 1 1.2 Structure 2 1.3 Market Needs for Security 2 1.4 Targets inside Containers 5 1.5 Buried Land Mines 5 1.6 Forensic Detection of Buried Bodies 6 1.7 Avalanche and Earthquake Victims 7 1.8 Concealed Humans 7 1.9 Concealed Targets on Humans 8 1.10 Radiological Considerations 8 1.11 Licensing Considerations 10 1.12 Statistics of the Detection Performance of a Sensor 12 1.13 Summary 19 2 Physics of Propagation 20 2.1 Introduction 20 2.2 Propagation of Electromagnetic Fields in Free Space 21 2.2.1 Reactive Fields 22 2.2.2 Near Fields 23 2.2.3 Far Fields 23 2.2.4 Polarization 24 2.2.5 Radar Cross Section 27 2.2.6 Reflection 30 2.2.7 Refraction 31 2.2.8 Brewster Angle 31 2.2.9 Dispersion 33 2.2.10 Anisotropy 33 2.2.11 Clutter 33 2.3 Propagation of Ene...
