Mathematical Models And Numerical Methods For Full Wave Analysis Of Prolate And Oblate Spheroidal Conformal Microwave Components PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Mathematical Models And Numerical Methods For Full Wave Analysis Of Prolate And Oblate Spheroidal Conformal Microwave Components PDF full book. Access full book title Mathematical Models And Numerical Methods For Full Wave Analysis Of Prolate And Oblate Spheroidal Conformal Microwave Components.
Author | : Saif Al-Hasson |
Publisher | : Cuvillier Verlag |
Total Pages | : 158 |
Release | : 2014-08-29 |
Genre | : Technology & Engineering |
ISBN | : 3736947968 |
Download Mathematical Models and Numerical Methods for Full Wave Analysis of Prolate and Oblate Spheroidal Conformal Microwave Components Book in PDF, ePub and Kindle
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 | : Saif Al-Hasson |
Publisher | : |
Total Pages | : 158 |
Release | : 2014 |
Genre | : |
ISBN | : 9783954047963 |
Download Mathematical Models and Numerical Methods for Full Wave Analysis of Prolate and Oblate Spheroidal Conformal Microwave Components Book in PDF, ePub and Kindle
Author | : Igor T. Selezov |
Publisher | : Springer |
Total Pages | : 241 |
Release | : 2017-09-15 |
Genre | : Technology & Engineering |
ISBN | : 9789811049224 |
Download Wave Propagation and Diffraction Book in PDF, ePub and Kindle
This book presents two distinct aspects of wave dynamics – wave propagation and diffraction – with a focus on wave diffraction. The authors apply different mathematical methods to the solution of typical problems in the theory of wave propagation and diffraction and analyze the obtained results. The rigorous diffraction theory distinguishes three approaches: the method of surface currents, where the diffracted field is represented as a superposition of secondary spherical waves emitted by each element (the Huygens–Fresnel principle); the Fourier method; and the separation of variables and Wiener–Hopf transformation method. Chapter 1 presents mathematical methods related to studying the problems of wave diffraction theory, while Chapter 2 deals with spectral methods in the theory of wave propagation, focusing mainly on the Fourier methods to study the Stokes (gravity) waves on the surface of inviscid fluid. Chapter 3 then presents some results of modeling the refraction of surf ace gravity waves on the basis of the ray method, which originates from geometrical optics. Chapter 4 is devoted to the diffraction of surface gravity waves and the final two chapters discuss the diffraction of waves by semi-infinite domains on the basis of method of images and present some results on the problem of propagation of tsunami waves. Lastly, it provides insights into directions for further developing the wave diffraction theory.
Author | : Carson Flammer |
Publisher | : |
Total Pages | : 220 |
Release | : 1969 |
Genre | : |
ISBN | : |
Download Spheroidal wave functions Book in PDF, ePub and Kindle
Author | : William J. Layton |
Publisher | : Springer |
Total Pages | : 184 |
Release | : 2012-01-29 |
Genre | : Mathematics |
ISBN | : 9783642244100 |
Download Approximate Deconvolution Models of Turbulence Book in PDF, ePub and Kindle
This volume presents a mathematical development of a recent approach to the modeling and simulation of turbulent flows based on methods for the approximate solution of inverse problems. The resulting Approximate Deconvolution Models or ADMs have some advantages over more commonly used turbulence models – as well as some disadvantages. Our goal in this book is to provide a clear and complete mathematical development of ADMs, while pointing out the difficulties that remain. In order to do so, we present the analytical theory of ADMs, along with its connections, motivations and complements in the phenomenology of and algorithms for ADMs.
Author | : |
Publisher | : |
Total Pages | : 918 |
Release | : 1986 |
Genre | : Aeronautics |
ISBN | : |
Download International Aerospace Abstracts Book in PDF, ePub and Kindle
Author | : Mark Ainsworth |
Publisher | : Springer |
Total Pages | : 410 |
Release | : 2011-09-27 |
Genre | : Mathematics |
ISBN | : 9783642554841 |
Download Topics in Computational Wave Propagation Book in PDF, ePub and Kindle
These ten detailed and authoritative survey articles on numerical methods for direct and inverse wave propagation problems are written by leading experts. Researchers and practitioners in computational wave propagation, from postgraduate level onwards, will find the breadth and depth of coverage of recent developments a valuable resource. The articles describe a wide range of topics on the application and analysis of methods for time and frequency domain PDE and boundary integral formulations of wave propagation problems. Electromagnetic, seismic and acoustic equations are considered. Recent developments in methods and analysis ranging from finite differences to hp-adaptive finite elements, including high-accuracy and fast methods are described with extensive references.
Author | : Stephen Gedney |
Publisher | : Springer Nature |
Total Pages | : 242 |
Release | : 2022-05-31 |
Genre | : Technology & Engineering |
ISBN | : 3031017129 |
Download Introduction to the Finite-Difference Time-Domain (FDTD) Method for Electromagnetics Book in PDF, ePub and Kindle
Introduction to the Finite-Difference Time-Domain (FDTD) Method for Electromagnetics provides a comprehensive tutorial of the most widely used method for solving Maxwell's equations -- the Finite Difference Time-Domain Method. This book is an essential guide for students, researchers, and professional engineers who want to gain a fundamental knowledge of the FDTD method. It can accompany an undergraduate or entry-level graduate course or be used for self-study. The book provides all the background required to either research or apply the FDTD method for the solution of Maxwell's equations to practical problems in engineering and science. Introduction to the Finite-Difference Time-Domain (FDTD) Method for Electromagnetics guides the reader through the foundational theory of the FDTD method starting with the one-dimensional transmission-line problem and then progressing to the solution of Maxwell's equations in three dimensions. It also provides step by step guides to modeling physical sources, lumped-circuit components, absorbing boundary conditions, perfectly matched layer absorbers, and sub-cell structures. Post processing methods such as network parameter extraction and far-field transformations are also detailed. Efficient implementations of the FDTD method in a high level language are also provided. Table of Contents: Introduction / 1D FDTD Modeling of the Transmission Line Equations / Yee Algorithm for Maxwell's Equations / Source Excitations / Absorbing Boundary Conditions / The Perfectly Matched Layer (PML) Absorbing Medium / Subcell Modeling / Post Processing
Author | : Philip McCord Morse |
Publisher | : |
Total Pages | : 520 |
Release | : 1946 |
Genre | : Mathematical physics |
ISBN | : |
Download Methods of Theoretical Physics Book in PDF, ePub and Kindle
Author | : Houjun Mo |
Publisher | : Cambridge University Press |
Total Pages | : 841 |
Release | : 2010-05-20 |
Genre | : Science |
ISBN | : 0521857937 |
Download Galaxy Formation and Evolution Book in PDF, ePub and Kindle
A coherent introduction for researchers in astronomy, particle physics, and cosmology on the formation and evolution of galaxies.