Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 105 for “"electromagnetic wave"”.
-
Electromagnetic wave propagation on helical conductors
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1951.
-
Modeling Electromagnetic Wave Propagation in Electrically Large Structures
<p>Existing unified numerical electromagnetic methods are often unable to analyze electrically large structures due to the amount of memory and processing power required, necessitating approximate analyses with limited applicability. In this research a hybrid modeling methodology is adopted to …
-
High-frequency electromagnetic wave scattering from rough surfaces
"A new technique in solving the rough surface scattering problem is presented. The method employed, entitled the ""shooting and bouncing rays"" (SBR) method, is based on a combination of the geometric optics (GO) theory and the physical optics (PO) theory. The SBR method improves on the Kirchhoff …
-
Electromagnetic wave propagation in a magnetized laboratory plasma
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
-
Online Electromagnetic Wave Monitoring System for Petroleum Industry Applications
… of oil, water, and gas flowing in a pipeline. Electromagnetic (EM) Wave sensors can provide an attractive solution, because microwave signals can penetrate most materials allowing the measurement to be representative for the cross section of the pipeline. In this thesis, EM wave sensors …
-
Fast algorithms for solving integral equations of electromagnetic wave scattering
Computational electromagnetics plays an important role in the study of wave scattering and radiation from large and complex objects. This dissertation develops fast numerical algorithms for solving two-dimensional and three-dimensional integral equations of electromagnetic wave scattering. They …
-
Electromagnetic wave models for polarimetric remote sensing of geophysical media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
-
Plane electromagnetic wave scattering by a coated perfectly conducting cylinder
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
-
Non-invasive electromagnetic wave sensor for flow measurement and biphase application
… large frequency shift. In this research, the electromagnetic cylindrical cavity sensor system successfully demonstrated its capability to analyze various fractions of water-gas mixture. The results were consistent in the case of both the static and dynamic flow. The statistical analysis of the …
-
Numerical methods for electromagnetic wave propagation and scattering in complex media
… are developed to study various applications in electromagnetic wave propagation and scattering. Analytical methods are used where possible to enhance the efficiency, accuracy, and applicability of the numerical methods. Electromagnetic induction (EMI) sensing is a popular technique to detect and …
-
Electromagnetic wave scattering by discrete random media with remote sensing applications
The scattering of electromagnetic waves in medium with randomly distributed discrete scatterers is studied. Analytical and numerical solutions to several problems with implications for the active and passive remote sensing of the Earth environment are obtained. The quasi-magnetostatic (QMS) …
-
The Buffered Block Forward Backward technique for solving electromagnetic wave scattering problems
… on efficient numerical techniques for solving electromagnetic wave scattering problems. The research is focused on three main areas: scattering from perfect electric conductors, 2D dielectric scatterers and 3D dielectric scattering objects. The problem of fields scattered from perfect electric …
-
A boundary integral equation approach to three dimensional electromagnetic wave scattering problems
<p>Electromagnetic scattering models are finding increasing interest in many applications ranging from nondestructive evaluation (NDE) to design of optical systems. The availability of a computational scattering model characterizing the underlying system serves several purposes. First, it serves as …
-
Computer-aided design-based high-frequency electromagnetic wave scattering from complex bodies
This work investigates the use of high frequency electromagnetic scattering techniques, such as the physical theory of diffraction (PTD) and the geometrical theory of diffraction (GTD) and the shooting and bouncing rays (SBR) method combined with computer aided design (CAD) compatible geometries, …
-
Electromagnetic wave scattering by surface discontinuities in a perfectly conducting ground plane
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
-
Accelerated stationary iterative methods for the numerical solution of electromagnetic wave scattering problems
… applied to the method of moments solution of electromagnetic wave scattering problems. In recent years there has been much focus on current marching iterative methods, such as Gauss-Seidel and others. These methods attempt to march a solution for the unknown basis function amplitudes in a …
-
Model-order reduction techniques for the numerical solution of electromagnetic wave scattering problems
… (MOR) techniques for the field of computational electromagnetics in relation to the electric field integral equation (EFIE) formulation. The ultimate goal is to enable a fast-sweep analysis. In a fast-sweep problem, some parameter on which the original problem depends is varying and the problem …
-
AN INVESTIGATION OF SHORT RANGE ELECTROMAGNETIC WAVE COMMUNICATION FOR UNDERWATER ENVIRONMENTAL MONITORING UTILISING A SENSOR NETWORK PLATFORM
… of this research is to investigate short range electromagnetic wave communication for underwater environmental monitoring utilising a sensor network platform. Theoretical study and preliminary experiments have confirmed that ISM (industrial, scientific and medical) band at 433MHz was suitable …
-
Resolution of signal components of a resultant electromagnetic wave received in a multipath field of microwave frequencies
The growing use and demand for microwave communication systems has led to an increase in system density, particularly in urban areas. Consequently this rise has increased the risk of interference. Especially in urban areas the abundant presence of potential obstacles increase the risk of multipath …
Page 1 of 6