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Author: Volkert W. Hansen
Publisher: Wiley-Blackwell
ISBN:
Category : Mathematics
Languages : en
Pages : 312
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Book Description
This monograph presents a variety of methods for the numerical solution of practical problems (especially transient responses in layered media) which occur in microwave antenna installations. Provides a survey of the present state of research, covering the modern applications of methods such as Green's function and the Sommerfield integrals, to practical problems involving dipoles, focusing antennas, and model calculations.
Author: Volkert W. Hansen
Publisher: Wiley-Blackwell
ISBN:
Category : Mathematics
Languages : en
Pages : 312
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Book Description
This monograph presents a variety of methods for the numerical solution of practical problems (especially transient responses in layered media) which occur in microwave antenna installations. Provides a survey of the present state of research, covering the modern applications of methods such as Green's function and the Sommerfield integrals, to practical problems involving dipoles, focusing antennas, and model calculations.
Author: David B. Davidson
Publisher: Cambridge University Press
ISBN: 1139471643
Category : Technology & Engineering
Languages : en
Pages : 413
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Book Description
The numerical approximation of Maxwell's equations, Computational Electromagnetics (CEM), has emerged as a crucial enabling technology for radio-frequency, microwave and wireless engineering. The three most popular 'full-wave' methods - the Finite Difference Time Domain Method, the Method of Moments and the Finite Element Method - are introduced in this book by way of one or two-dimensional problems. Commercial or public domain codes implementing these methods are then applied to complex, real-world engineering problems, and a careful analysis of the reliability of the results obtained is performed, along with a discussion of the many pitfalls which can result in inaccurate and misleading solutions. The book will empower readers to become discerning users of CEM software, with an understanding of the underlying methods, and confidence in the results obtained. It also introduces readers to the art of code development. Aimed at senior undergraduate/graduate students taking CEM courses and practising engineers in the industry.
Author: Saif Al-Hasson
Publisher: Cuvillier Verlag
ISBN: 3736947968
Category : Technology & Engineering
Languages : en
Pages : 158
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Book Description
Conformal components are used nowadays at higher rate than ever before. They can be found in curved mobile phones, communication, navigation, and imaging systems in land, water, air, and space vehicles. The integration of those components within the external structure became of significant importance for aerodynamic, electromagnetic, aesthetic, or physical reasons. As a result, many mathematical models were previously developed to analyze and optimize such conformed devices. In this thesis, we contributed to this field by developing various models for full wave analysis of spheroidal components. As a starting point, mathematical formulas for conforming antennas on oblate and prolate spheroids were obtained. Those conformation methods were validated by conforming many antennas on spheroidal surfaces. They were then used to formulate Method of Moments equations with spheroidally curved current functions for analyzing wire antennas of random shape conformed to spheroids in the frequency domain. The complete model was applied to a conformal Archimedean spiral antenna on an oblate spheroid and showed that the conformed spiral has similar current distribution as its planar counterpart but produces an unsymmetrical radiation pattern. The obtained model was then extended to spheroidal multi-layer structures by integrating the spheroidal dyadic Green’s Function within its mathematical derivation. However, due to a detected divergence in that function, the model couldn’t be implemented. On the side of time based analysis methods, a Finite Difference Time Domain method was developed for closed oblate and prolate spheroidal structures. Alternative formulas for the structure’s singularities and the condition of numerical stability were derived as well. The obtained model was then validated and used to characterize spheroidal cavities in the time and frequency domains. The method was extended later to unbounded spheroidal domain by deriving the Absorbing Boundary Conditions using the One Way Wave method. The whole model was then applied to characterize a patch antenna conformed to a prolate spheroid. Finally, an analytical solution for the transient fields in spherical multilayer media energized by spherical harmonics source and an algorithm for tracing back the path of all the reflected waves were obtained. The model was applied to different multilayer structures where the transient response was obtained and validated against a numerical solution.
Author: John M. Jarem
Publisher: CRC Press
ISBN: 1439804230
Category : Science
Languages : en
Pages : 434
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Book Description
This text examines a variety of spectral computational techniques— including k-space theory, Floquet theory and beam propagation— that are used to analyze electromagnetic and optical problems. The authors tie together different applications in EM and optics in which the state variable method is used. Emphasizing the analysis of planar diffraction gratings using rigorous coupled wave analysis, the book presents many cases that are analyzed using a full-field vector approach to solve Maxwell’s equations in anisotropic media where a standard wave equation approach is intractable.
Author: Warren L. Stutzman
Publisher: John Wiley & Sons
ISBN: 0470576642
Category : Technology & Engineering
Languages : en
Pages : 848
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Book Description
Stutzman's 3rd edition of Antenna Theory and Design provides a more pedagogical approach with a greater emphasis on computational methods. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational changes to improve understanding; more details to selected important topics such as microstrip antennas and arrays; and expanded measurements topic.
Author: C. A. Brebbia
Publisher: WIT Press
ISBN: 1845640845
Category : Mathematics
Languages : en
Pages : 929
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Book Description
Containing papers presented at the Thirteenth International Conference in this well established series on (CMEM) Computational Methods and Experimental Measurements. These proceedings review state-of-the-art developments on the interaction between numerical methods and experimental measurements.Featured topics include: Computational and Experimental Methods; Experimental and Computaqional Analysis; Computer Interaction and Control of Experiments; Direct, Indirect and In-Situ Measurements; Particle Methods; Structural and Stress Analysis; Structural Dynamics; Dynamics and Vibrations; Electrical and Electromagnetic Applications; Biomedical Applications; Heat Transfer; Thermal Processes; Fluid Flow; Data Acquisition; Remediation and Processing and Industrial Applications.
Author: John M. Jarem
Publisher: CRC Press
ISBN: 1439891281
Category : Science
Languages : en
Pages : 426
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Book Description
The current rapid and complex advancement applications of electromagnetic (EM) and optical systems calls for a much needed update on the computational methods currently in use. Completely revised and reflecting ten years of develoments, this second edition of the bestselling Computational Methods for Electromagnetic and Optical Systems provides the
Author: Samsul Ariffin Abdul Karim
Publisher: Springer Nature
ISBN: 9811589879
Category : Technology & Engineering
Languages : en
Pages : 180
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Book Description
This book presents theoretical modeling and numerical simulations applied to drive several applications towards Industrial Revolution 4.0 (IR 4.0). The topics discussed range from theoretical parts to extensive simulations involving many efficient algorithms as well as various statistical techniques. This book is suitable for postgraduate students, researchers as well as other scientists who are working in mathematics, statistics and numerical modeling and simulation.
Author: Frank Gustrau
Publisher: Springer Science & Business Media
ISBN: 3540286152
Category : Technology & Engineering
Languages : en
Pages : 287
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Book Description
This book focuses on practical computational electrodynamics, guiding the reader step-by-step through the modeling process from the initial "what question must the model answer?", through the setting up of a computer model, to post processing, validation and optimization. The book offers a realistic view of the capabilities and limits of current 3-D field simulators and how to apply this knowledge efficiently to EM analysis and design of RF applications in modern communication systems.
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 946
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Book Description
