The application of the FDTD technique in the calculation of the S-parameters of specific diode mounting and waveguide probe structures is discussed in this paper. Comparative results are given and the FDTD technique is evaluated as an optimized CAD tool. Introduction The finite difference time domain method is used in the RF characterization of diode mounting and waveguide probe structures. A v...

Ground penetrating radar (GPR) forward modeling is one of the core geophysical research topics and also primary task simulating ground system. It a process propagation laws characteristics electromagnetic waves in simulated space when distribution internal parameters exploration region known. And finite-difference-time-domain (FDTD) method has space-time transient evolution wave, whose numerica...

In this research, we modeled a silicon-based photodetector for the NIR-IR spectrum using grating structure fabricated metal-assisted chemical etching method. A nanostructure by method is free of defects such as unwanted sidewall metal depositions. The device simulated Lumerical finite difference time domain (FDTD) optical characteristics and CHARGE electrical characteristics. First, optimized d...

This work introduces a conformal finite difference time domain (CFDTD) particle-in-cell (PIC) method to accurately and efficiently study electromagnetic or radio frequency (RF) structures and their interactions with charged particles. For illustration, the dispersion relation of an A6 relativistic magnetron has been determined and a preliminary hot test including electrons has been done. The ac...

This paper presents an efficient and simple approach of implementing the Landau-Lifshitz-Gilbert (LLG) equation of magnetisation motion within the Finite-difference Time-domain (FDTD) method. This combined electromagnetic-micromagnetic simulation technique is particularly important for modeling electromagnetic interaction with lossy magnetic material in the presence of current and magnetic sour...

This paper presents a comprehensive full-wave analysis of packaged nonlinear active microwave circuits by applying the extended finite-difference time-domain (FDTD) method. Based on the approach of using equivalent sources, the device–wave interaction is characterized and incorporated into the FDTD time-marching scheme. As a consequence, analysis of linear and nonlinear properties, including ha...

We report a general computational model of complex material media for electrodynamics simulation using the Finite-Difference Time-Domain (FDTD) method. It is based on a multi-level multi-electron quantum system with electron dynamics governed by Pauli Exclusion Principle, state filling, and dynamical Fermi-Dirac Thermalization, enabling it to treat various solid-state, molecular, or atomic medi...

Abstract: We consider the anisotropic uniaxial formulation of the perfectly matched layer model (UPML). We prove the decay of different energies for the UPML, under certain assumptions, to demonstrate the well-posedness of this formulation. We present and analyze a mixed finite element method for the time domain discretization of the UPML to simulate wave propagation in unbounded domains in two...