Investigation of rough surface scattering of electromagnetic waves using finite element method


Thesis Type: Postgraduate

Institution Of The Thesis: Orta Doğu Teknik Üniversitesi, Faculty of Engineering, Department of Electrical and Electronics Engineering, Turkey

Approval Date: 2013

Student: ÖZÜM EMRE AŞIRIM

Supervisor: MUSTAFA KUZUOĞLU

Abstract:

This thesis analyzes the problem of electromagnetic wave scattering from rough surfaces using finite element method. Concepts like mesh generation and random rough surface generation will be discussed firstly. Then the fundamental concepts of the finite element method which are the functional form of a given partial differential equation, implementation of the element coefficient matrices, and the assemblage of elements will be discussed in detail. The rough surface and the overall mesh geometry will be implemented with the functional form of the wave equation, in the form of a global coefficient matrix using finite element method. Along with an incident wave, boundary conditions on the rough surface will be imposed and the scattering from different rough surfaces will be analyzed by solving the resulting linear system of equations that is yielded by the finite element method. The issues of wave resolution, required mesh size, and the required computation time will also be discussed as part of the analysis.