An optimal design of two dimensional (2D) hexagonal photonic bandgap (PBG) resonating micro-optical defect cavity on IV-VI lead salt material has been carried out. The nature of both the transverse electric (TE) and transverse magnetic (TM) band structure for the electromagnetic waves in the periodic triangular lattice pattern is formulated by the well-established plane wave expansion (PWE) met...

Two dimensional metallic photonic band gap (PBG) structures, which have higher power handling capability, have been analyzed for their dispersion characteristics. The analysis has been performed using finite difference time domain (FDTD) method based on the regular orthogonal Yee’s cell. A simplified unit cell of triangular lattice PBG structure has been considered for the TE and TM modes of pr...

Over the past few years, a number of different finite-difference time-domain (FDTD) methods for modeling electromagnetic propagation in an isotropic cold plasma have been published. We have analyzed the accuracy and stability of these methods to determine which method provides the greatest accuracy for a given computation time. For completeness, two new FDTD methods for cold plasma, one of whic...

GPUs excel at solving many parallel problems and hence dramatically increase the computation performance. In electrodynamics and many other fields, FDTD method is widely used due to its simplicity, accuracy, and practicability. In this paper, we applied the FDTD method on the Fermi Architecture GPUs, the latest product of NVidia, for a better understanding of Fermi's new features, such as the d...

We present a simplified numerical method to solve for the current distribution in a V-shaped antenna excited by an electric field with arbitrary polarization. The scattered far-field amplitude, phase, and polarization of the antennas are extracted. The calculation technique presented here is an efficient method for probing the large design parameter space of such antennas, which have been propo...

The aim of this study is to develop a new whole-body averaged specific absorption rate (SAR) estimation method based on the external-cylindrical field scanning technique. This technique is adopted with the goal of simplifying the dosimetry estimation of human phantoms that have different postures or sizes. An experimental scaled model system is constructed. In order to examine the validity of t...

In this thesis, the application of numerical techniques to electromagnetic problems in microelectronic and radar imaging systems are investigated. In particular the following problems are studied: (1) Dielectric rib waveguide discontinuities are analyzed with the Finite Difference Time Domain (FDTD) method. The application of Berenger's Perfectly Matched Layer to multi-layered dielectrics is an...

High spatial resolution studies of the interaction of the human body with electromagnetic waves of low frequency presents a difficult computational problem. As these studies typically require at least 104 points per wavelength, a huge number of time steps would be needed to be able to use the finite difference time domain method (fdtd). In this paper, a new technique is described, which allows ...

In this paper, MATLAB based computational approaches for the design and analysis of time-varying capacitors using finite-difference time-domain (FDTD) technique Simulink environment are presented. The FDTD formulation multiple lumped loaded in series on a transmission line is discussed extended to include time variation capacitance. methodology same also MATLAB's RF Blockset Library. dev...