Antenna, wireless communication and other electrical engineers use asymptotic techniques for solving electromagnetic problems when the electrical size of a given scenario is large in comparison to the wavelength. This practical book offers in-depth coverage of this area, showing how to apply these techniques to the analysis of complex electromagnetic problems in order to obtain results with an exceptionally high degree of accuracy. Focusing on two highly-effective methods - the uniform theory of diffraction (UTD) and physical optics (PO), this book is unique in that it emphasizes how to solve real-world problems, rather than simply explaining theory like other books on the market. This first-of-its-kind resource show professionals how to apply this knowledge to a wide range of projects in the field, including antenna design, mobile communications, and RCS (radar cross section) computation. This authoritative book is supported with more than 100 illustrations and over 250 equations. DVD Included: Contains a demonstration version of the NewFASANT software suite, including codes used to run the case studies presented in the book. A user's guide is also provided to help engineers understand how to use the codes.
Preface ; Introduction - Asymptotic Techniques and Real-World Problems. Structure of This Book. ; Geometric Description of the Bodies and Computation of Geometric Parameters - Overview of the Geometric Modeling of Complex Objects. Rational Bezier Curves. Rational B-Spline Curves. Rational Bezier Surfaces. Rational B-Spline Surfaces. Transformation from NURBS Representation to Bezier Representation. Computation of Geometric Parameters on Bezier Surfaces. ; Geometrical Optics and Uniform Theory of Diffraction (GO/UTD) - Historical Overview. Geometrical Optics Equations. Direct Ray. Reflected Field. Diffracted Field. Double Effects. Creeping Waves. ; Physical Optics and Physical Theory of Diffraction (PO/PTD) -Introduction to PO/PTD. Physical Optics Foundations. Methods to Calculate the PO Integral for Complex Bodies. The Stationary Phase Method. Application of PO to the Computation of Higher-Order Reflections. Physical Theory of Diffraction and the Equivalent Current Method.Introduction of Radar Absorbing Materials (RAM) in the PO Formulation. ; Acceleration Techniques - Acceleration Techniques Applied to High-Frequency Problems. Elimination of Surfaces Using Simple Criteria. Classical Techniques for the Ray-Tracing Acceleration for the Shadowing Test. Application of the AZB to Bodies Modeled by Parametric Surfaces. Combination of AZB-SVP for the Analysis in the Near Zone. Application of AZB for the Analysis of the RCS. ; Applications - Overview of Asymptotic Technique Codes. Results Obtained with FASANT. Results Obtained with POGCROS and Numerical Evaluation of the PO Integral. ; About the Authors. Index ;
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Manuel F. Catedra
Manuel F. Catedra is a professor at the University of Alcala, Madrid, Spain. He received M.S. and Ph.D. degrees in telecommunications engineering from the Polytechnic University of Madrid and has published 35 professional papers.
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Francisco Saez De Adana
Francisco Saez de Adana is a professor in the Department of Computer Science at the University of Alcala, Spain. He received a B.S., M.S. and Ph.D. in telecommunications engineering from the University of Cantabria, Spain.
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Ivan Gonzalez
Ivan Gonzalez is an assistant professor in the Department of Computer Science at the University of Alcala, Spain.
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Oscar Gutierrez
Oscar Gutierrez is an assistant professor in the Department of Computer Science at the University of Alcala, Spain. He holds a B.S. and M.S. in telecommunications engineering from the University of Cantabria, Spain and a Ph.D. in telecommunications from the University of Alcala.
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Lorena Lozano
Lorena Lozano is an assistant professor in the Department of Computer Science at the University of Alcala, Spain.