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Tuesday, April 21, 2020 | History

3 edition of comparison of two conformal methods for FDTD modeling found in the catalog.

comparison of two conformal methods for FDTD modeling

Mark William Steeds

comparison of two conformal methods for FDTD modeling

  • 212 Want to read
  • 11 Currently reading

Published .
Written in English

    Subjects:
  • Electromagnetic waves -- Scattering -- Mathematical models,
  • Finite differences,
  • Time-domain analysis

  • Edition Notes

    Other titlesComparison of two conformal methods for FDTD modelling.
    Statementby Mark William Steeds.
    The Physical Object
    Paginationix, 32 leaves, bound :
    Number of Pages32
    ID Numbers
    Open LibraryOL17010390M
    OCLC/WorldCa34342184

    Conformal FDTD-methods to avoid time step reduction with and without cell enlargement. Authors: Igor Zagorodnov: DESY, Notkestra Hamburg, Germany: Rolf Schuhmann: Universität Paderborn, EIM-E, Fachgebiet Theoretische Elektrotechnik, Warburger Strasse , Paderborn, Germany:Cited by: High-order FDTD methods via derivative matching for Maxwell’s equations with material interfaces 1;2 1Department of Mathematics, Michigan State University, East Lansing, MI 2Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI (September9,) Abstract. Locally Conformal Method • Locally conformal meshes are the most reliable and proven methods • Alters existing orthogonal FDTD grid • Modifies edge lengths and areas only at intersection points • Remainder of FDTD grid undisturbed • Easy to implement with current FDTD electromagnetic solvers • Difficult mesh generation Locally modifiedFile Size: 2MB. The Finite-Difference Time-Domain method (FDTD) is today’s one of the most popular technique for the solution of electromagnetic problems. It has been successfully with d=1, 2, or 3 for one-, two-, or three-dimensional problems, respectively, and ∆ the smallest cell Size: KB.


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comparison of two conformal methods for FDTD modeling by Mark William Steeds Download PDF EPUB FB2

A comparison of two conformal methods for FDTD modeling Article (PDF Available) in IEEE Transactions on Electromagnetic Compatibility 38(2) - June with 77 Reads How we measure 'reads'. Finite-difference time-domain or Yee's method (named after the Chinese American applied mathematician Kane S.

Yee, born ) is a numerical analysis technique used for modeling computational electrodynamics (finding approximate solutions to the associated system of differential equations).Since it is a time-domain method, FDTD solutions can cover a wide. Stability Analysis and Improvement of the Conformal ADI-FDTD Methods Article in IEEE Transactions on Antennas and Propagation 59(6).

Free Online Library: A dispersive conformal FDTD technique for accurate modeling electromagnetic scattering of THZ waves by inhomogeneous plasma cylinder array.(Report) by "Progress In Electromagnetics Research"; Physics Antenna arrays Properties Electromagnetic scattering Electromagnetic waves Scattering Engineering research Equipment performance.

Introduction to the Finite-Difference Time-Domain (FDTD) Method for Electromagnetics guides the reader through the foundational theory of the FDTD method starting with the one-dimensional transmission-line problem and then progressing to the solution of Maxwell's equations in Cited by: A Conformal Finite Difference Time Domain (CFDTD) Algorithm For Modeling Perfectly Conducting Objects.

Wenhua Yu, Raj Mittra, Dean Arakaki, comparison of two conformal methods for FDTD modeling book Douglas H. Werner. address this problem via the use of conformal FDTD methods [], the problems of mesh generation.

The Finite-Difference Time-Domain Method, 2 ed., Artech House, Boston, MA, [2] S. Dey and R. Mittra, A Modified Locally Conformal Finite-Difference Time-Domain Algorithm for Modeling Three-Dimensional Perfectly Conducting Objects, Microwave and Optical Technology Letters, vol.

17, no. 6,April, File Size: 4MB. THE CONFORMAL DISPERSIVE FDTD METHOD Among the conformal schemes for modeling comparison of two conformal methods for FDTD modeling book objects as shown in [26,27], a new equivalent permittivity is introduced to modify the update equations of electric flelds.

The basic idea of these techniques is that the permittivity of the conformal cells should be determined. Chapter 3: Introduction to the Finite-Difference Time-Domain Method: FDTD in 1D. This is where things really start. You can skip the previous two chapters, but not this one.

Chapter 3 contents: Introduction The Yee Algorithm Update Equations in 1D Computer Implementation of a One-Dimensional FDTD Simulation Bare-Bones Simulation.

Introduction. In the past decades, most of the research on FDTD was focused on overcoming the staircase problem, of the conventional algorithm. These attempts have resulted in the development of various conformal versions of FDTD,,.However, the most simple and accurate conformal methods (for example,) demand to reduce the time step due to the Cited by:   This lecture reviews some basic electromagnetic principles and then formally introduces FDTD and the basic numerical engine behind the method.

"FDTD is presently the method of choice for solving most numerical electromagnetics studies. The Inan and Marshall book is a very thorough, yet readable, account of all the details of the method, very valuable for students and professionals alike, with problems included, ready for a by: FDTD Method Why Use FDTD Simulation Software.

While many electromagnetic simulation techniques are applied in the frequency-domain, FDTD solves Maxwell’s equations in the time domain. This means that the calculation of the electromagnetic field values progresses at. High-Frequency Methods for PEC Surfaces 90 High-Frequency Methods for Dielectric Coated Surfaces 93 Two Examples 95 Introduction 95 The Aperture Antenna 95 The Microstrip-Patch Antenna 98 A Comparison of Analysis Methods Appendix 4A—Interpretation of the ray theory 4A.1 Watson Transformation   A new efficient parallel finite-difference time-domain (FDTD) meshing algorithm, based on the ray tracing technique, is proposed in this paper.

This algorithm can be applied to construct various FDTD meshes, such as regular and conformal by: 3. STUDY ON CONFORMAL FDTD FOR ELECTROMAGNETIC SCATTERING BY TARGETS WITH THIN COATING X.-J. Hu and D.-B.

Ge DepartmentofPhysics SchoolofScience XidianUniversity Xi’an,China Abstract—In order to simulate the electromagnetic scattering of targetswiththin-coatingaccurately,aconformalfinite-differencetime.

loop of FDTD, it is possible to treat an impedance sheet as a 2D layer in the problem space (Fig. This approach is the closest model to the actual structure, and, unlike the former methods, there will not be any approximation involved in the modeling procedure due to considering a thickness for the impedance sheet.

FDTD methods Divergence-free Numerical stability 18th and 25th February, UCD - p. 3 Properties of materials µ – magnetic permeability. µ = µ0 µr, where µ0 = 4π 10−7 N A2 is free space permeability.

ε – dielectric permittivity. ε = ε 0εr, ε = 1 c2µ0 is free space permittivity in F m. In general, µr and εr are File Size: KB. The finite‐difference time‐domain (FDTD) method is a numerical technique that can be used to solve a wide variety of problems via time‐domain simulations.

A low‐cost method has previously been presented for accurately modeling continuously varying pressure‐release surfaces [Schneider et al., J. Acoust. Soc.– ()]. The overall simplicity Author: John B. Schneider, Julius G. Tolan.

CONFORMAL FDTD MODELING OF 3-D WAKE FIELDS T. Jurgens and F. Harfoush Fermi National Accelerator Laboratory* Batavia, Illinois Abstract Many computer codes have been written to model wake fields. Rere we describe the use of the Conformal Finite Difference Time Domain (CFDTD) method to model the.

For arbitrary geometries, several methods have been used to compute optical forces, such as the coupled dipole method [7], the T-matrix method [8] and the finite-difference time-domain (FDTD) method [9].

The FDTD method (Yee’s scheme) [10,11] is a popular and very successful method for solving time-domain Maxwell’s : Jinjie Liu, Moysey Brio, Jerome V.

Moloney. excellent agreement between the two methods, both showing a significant difference due to the edge treatment when compared with the results of Figure 6. Conclusions The ability of the FDTD method to easily and accurately model scattering by sheet impedances was demonstrated by comparing FDTD results for scattering from flat plates modeled.

What does C-FDTD stand for. C-FDTD stands for Conformal Finite-Difference Time Domain. Suggest new definition. This definition appears very rarely and is found in the following Acronym Finder categories: Science, medicine, engineering, etc.

Link/Page Citation. For modeling such problems, one has to go for a time‐domain methods. The finite‐difference time‐domain (FDTD) method and the finite‐element method (FEM) are extensively used for practical problem solving.

The FDTD method is based on a simple approximation of continuous derivatives on a square by: 4. Intro --Advanced Computational Electromagnetic Methods and Applications --Contents --Preface --Chapter 1 Novelties of Spectral Domain Analysis in Antenna Characterizations: Concept, Formulation, and Applications --Chapter 2 High-Order FDTD Methods --Chapter 3 GPU Acceleration of FDTD Method for Simulation of Microwave Circuits --Chapter 4.

Finite-difference time-domain (FDTD) is one of the primary computational electrodynamics modeling techniques available.

Since it is a time-domain method, FDTD solutions can cover a wide frequency range with a single simulation run and. FDTD is presently the method of choice for solving most numerical electromagnetics studies. The Inan and Marshall book is a very thorough, yet readable, account of all the details of the method, very valuable for students and professionals alike, with problems included, ready for a course.

Even those who use commercial programs would benefitFile Size: KB. Finite-difference time-domain (FDTD) is a popular computational electrodynamics modeling technique.

It is considered easy to understand and easy to implement in software. Since it is a time-domain method, solutions can cover a wide frequency range with a single simulation run. POLJAK et al.: USE OF CONFORMAL MODELS AND METHODS IN DOSIMETRY FOR NONUNIFORM FIELD EXPOSURE TABLE III COMPARISON OF MAXIMUM INDUCED ELECTRIC FIELD (V/M) AND MAGNETIC FLUX DENSITY (T) OBTAINED USING DIFFERENT NUMERICAL MODELS FOR THE CASE OF CIRCULAR COIL AND SPHERICAL.

(PML) formulations. Therefore, in acoustic FDTD modeling, there is very essential boundary condition formulation need to be taken into account for numerical modeling instead of propagation of the wave itself.

ABC technique was introduced by (Engquist, ) while the PML technique was introduced by (Berenger, ). Each ABC approach has it ownCited by: 1. The FDTD method (Yee’s scheme) [10,11] is a popu- lar and very successful method for solving time-domain Maxwell’s equations.

A major drawback of this method is the stair-casing approximation when modeling curved geometries that leads to large errors and reduced order of accuracy. Many methods have been proposed to elimi. Hello all, I want to know whether there will be difference between results if I use different methods(FEm and FDTD) to solve a particular design (antenna, surface coil etc) in terms of S-parameter and SAR.

I have used ADS for design a surface type coil and again used EMPro for measuring the SAR for the coil. Since in EMPro I need to use FDTD method to measure.

You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read.

Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. Among them, the FDTD [3] (Finite Difference Time Domain) techniques and the Plane Wave Method (PWM) are probably the most popular.

Their advantages and problems have been evidenced, for example, comparing results obtained with the PWM and the FDTD in a 2D case for a single defect [1] or with FDTD-2D and FDTD-3D for a line waveguide [4]. Finite-Difference Time-Domain (FDTD) is a popular electromagnetic modeling techniques.

It is easy to understand, easy to implement in software, and since it is a time-domain technique it can cover a wide frequency range with a single simulation run. The FDTD method belongs in the general class of differential time domain numerical modeling methods.

This lecture discusses several implementation details for one-dimensional FDTD including perfect boundary condition, simple sources, calculating grid resolution, and converting this to MATLAB code. Finite-Difference Time-Domain (FDTD) Method of Analyzing Maxwell’s Equations for Computational Electrodynamics using MATLAB Colby Rackliff, EE (Class of ) Research advisor: Dr.

Kurt Oughstun The FDTD method is a versatile numerical simulation method that is used in an increasingly wide range of fields.

And now, modeling their unique characteristics and behaviors in electromagnetic systems just got easier.

This one-stop resource gives engineers powerful finite-difference time-domain (FDTD) techniques for modeling metamaterials, complete with.

the standard FDTD These methods divide the simulation space into two separate grids; a fine one and a coarse one. Here, the subgridding method of (71 is used in conjunction with the second-order accurate in time and fourth-order accurate in space FDTD().

A comparative study on Explicit and Implicit FDTD methods for Electromagnetic simulation Gurinder Singh1, R. Kshetrimayum2 and Thingbaijam Rajkumari Chanu3 1,3Department of Electronics and Communication Engineering, NIT Mizoram, Aizawl, India [email protected] and [email protected] 2Department of Electronics and.

Two-Dimensional FDTD Simulations Introduction One of the truly compelling features of the FDTD method is that the simplicity the method enjoys in one dimension is largely maintained in higher dimensions. The complexity of other numerical techniques often increases substantially as the number of dimensions increases.

With the FDTDFile Size: KB.In this paper, we present an enlarged cell technique (ECT) to avoid the time step reduction encountered in the conformal finite-difference time-domain (CFDTD) method due to small irregular cells truncated by metallic boundaries.

We focus our efforts on the discussion of the accuracy and stability of the ECT and its comparison with other conformal methods, especially the one Cited by: ring- or disk-shaped cavity that is evanescently coupled to two straight waveguides. Rigorous numerical simulations of such devices are possible, e.g.

by means of Finite Difference Time Domain (FDTD) methods [3], but usually those direct calculations are very time-consuming. Alternatively, one can divide the device into separate regions.