Finite element modeling of scattering from objects in rectangular waveguides

Gülbaş, Hüseyin
Numerical analysis of scattering parameters of split ring resonators which are one of the microwave circuit elements is performed by the Finite Element Method in this thesis. The fundamentals of the model and analysis method will be discussed firstly. Afterwards, the basics of Finite Element Method including weak variational form of the wave equation, 3D formulations and application to scattering parameters will be presented. The concepts of Perfectly Matched Layer and resonators will be examined in detail. The accuracy of the method will be tested and the effects of different design parameters on the scattering parameters of split ring resonators will be investigated. These design parameters will be slit width, side width, and operation frequency. Moreover, reflection and transmission from the dielectric surfaces will be discussed. Additionally, each result will be compared with the ones achieved by using CST (Computer Simulation Technology) simulation software.