a r t i c l e i n f o a b s t r a c t Unified symplectic finite-difference time-domain (US-FDTD) Split perfectly matched layers (SPML) Metamaterials (MTMs) A high-order unified symplectic finite-difference time-domain (US-FDTD) method, which is energy conserved, for modeling the metamaterials is proposed. The lossless Drude dispersive model is taken into account in US-FDTD scheme, and the detai...

In this paper, an approach is proposed to improve the numerical precision at the sound field simulation by the finite-difference time-domain (FDTD) method. The FDTD method is a numerical solution for the wave equation, proposed by R. Courant. Although it has achieved to simulate wave propagation by numerical solution for the wave equation, it causes numerical dispersions due to their approximat...

This paper presents an efficient approach to implement electromagnetic-thermal (EM-T) co-simulation of a planar monopole antenna based on hybrid implicit-explicit finite-difference time-domain method (HIE-FDTD-M). First, the EM simulation is carried out by solving Maxwell’s curl equation. Once field reaches steady state, power loss computed according electric conductivity material. Finally, the...

This paper reviews the current progress in mathematical modeling of anti-reflective subwavelength structures. Methods covered include effective medium theory (EMT), finite-difference time-domain (FDTD), transfer matrix method (TMM), the Fourier modal method (FMM)/rigorous coupled-wave analysis (RCWA) and the finite element method (FEM). Time-based solutions to Maxwell's equations, such as FDTD,...

The trend of microwave circuits has been toward highly integrated systems. Most design tools for designing microwave circuits mounted the linear or the nonlinear devices adopt the fundamental circuit theory using the S matrix on the frequency domain. The harmonic balance method is also used to correspond to the nonlinear circuit. Therefore, the effect of the electromagnetic field, for example, ...

The nite-diierence time-domain (FDTD) method is a numerical technique that makes no explicit physical approximations to the underlying problem. The quality of an FDTD-based solution typically is determined by the discretization of the computational domain|the smaller the spacing, the more accurate the solution. Unfortunately, for large computational domains, i.e., ones spanning many wavelengths...

We have examined the Maxwell-Garnett, inverted Maxwell-Garnett, and Bruggeman rules for evaluation of the mean permittivity involving partially empty cells at particle surface in conjunction with the finite-difference time-domain (FDTD) computation. Sensitivity studies show that the inverted Maxwell-Garnett rule is the most effective in reducing the staircasing effect. The discontinuity of perm...

گونه‌های Charipinae جمع آوری شده از هند، بازنگری و تغییراتی در تاکسونومی برخی گونه‌هایی که اخیراً این کشور توصیف شده‌اند پیشنهاد شد. تعداد معتبر آرایه هفت عدد است عبارتند Alloxysta brevis (Thomson, 1862)، A. consobrina (Zetterstedt, 1838)، nottoni Ferrer-Suay & Pujade-Villar, 2015، pleuralis (Cameron, 1879)، Phaenoglyphis indica 2013، P. longicornis (Hartig, 1840) villosa 1841). ochracea Bijoy R...