1. Abstract: This paper describes a conformal Finite Difference Time Domain (FDTD) software package and presents its applications to RF antennas and mcrostrip circuit components. The program includes a Visual Basic GUI for graphically inputting the object geometries, setting source and boundary conditions, generating a non-uniform mesh, and post processing of the data. A robust Conformal Finite...

A novel hybrid Finite Difference Time Domain–Wavelet-Galerkin (FDTD–WG) technique is presented for the accurate representation of electromagnetic field solution in regions of fast field transitions. Its fundamental concept lies on the combination of the robust FDTD method with the Wavelet–Galerkin formulation, which in its turn can efficiently treat highly varying phenomena. The computational d...

The influence of the near-field probe-tip on a model sample consisting one-dimensional apertures is investigated using scanning optical microscopy (SNOM). We use finite-difference time-domain (FDTD) simulations combined with SNOM scans to show that has rather profound effect shape measured transmission intensity profiles. By taking into account perturbations introduced by probe, our newly devel...

As fundamental parameters for polarized-radiative-transfer calculations, the single-scattering phase matrix of irregularly shaped aerosol particles must be accurately modeled. In this study, a scattered-field finite-difference time-domain (FDTD) model and a scattered-field pseudospectral time-domain (PSTD) model are developed for light scattering by arbitrarily shaped dielectric aerosols. The c...

The finite difference time domain (FDTD) is a technique of the numerical method and simple but powerful versatile tool that has been widely applied in many scientific engineering problems. A typical application dealing with electromagnetic (EM) wave interactions physical structures. This used to solve governing equations various systems through obtaining approximations time-dependent differenti...

A band diagram is the fundamental for investigation of the electromagnetic properties of periodic structures such as photonic crystals in optics or electromagnetic band gap structures in antenna engineering. In this paper, the two famous computational methods, finite difference frequency domain (FDFD) and finite difference time domain (FDTD) methods are applied for band diagram calculation of 2...

The time-dependent Dirac equation is solved using the three-dimensional Finite Difference-Time Domain (FDTD) method. The dynamics of the electron wave packet in a scalar potential is studied in the arrangements associated with the Klein paradox: potential step barriers and linear potentials. No Klein paradox is observed.

In this paper, a method is presented for modeling sound propagation in rooms using a signal processing approach. Low order digital filters are designed to match to sound propagation transfer functions calculated from boundary material and air absorption data. The technique is applied to low frequency, finite difference time domain (FDTD) simulation of room acoustics and to real-time image-sourc...

This paper presents an investigation for the electromagnetic scattering characteristic of the 2-D infinitely long target located above two-layered 1-D rough surfaces. A finite-difference time-domain (FDTD) approach is used in this study, and the uniaxial perfectly matched layer (UPML) medium is adopted for truncation of FDTD lattices, in which the finite-difference equations can be used for the...