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6th IEEE Advanced Information Technology, Electronic and Automation Control Conference (IEEE IAEAC)

作者： Wang Pengfei Zhang Haifu CETC Res Inst 54 Shijiazhuang 050081 Hebei Peoples R China

ISBN: (数字)9781665458641

ISBN: (纸本)9781665458641

As a numerical algorithm, the finite-difference time domain (fdtd) is effective in solving electromagnetic scattering problem of medium with high complexity. The computional efficiency is low by the traditional central processing unit (CPU) platform. Therefore, the GPU-based fdtd method used to speed up its computational efficiency for bistatic RCS prediction of 3-D object is realized in this paper. Both the validation and efficiency of our implemen is verified by comparison of parallel result versus CPU's. A speedup of about 38x is realized on two NVIDIA K40 GPUs, which improves the computational efficiency. The results also show that the computional efficiency of the parallel method is related to the number of Yee cells.

关键词： fdtd algorithm electromagnetic scattering GPU computing radar cross section

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COUPLED ELECTROMAGNETIC-THERMODYNAMIC SIMULATIONS OF MICROWAVE HEATING PROBLEMS USING THE fdtd algorithm

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JOURNAL OF MICROWAVE POWER AND ELECTROMAGNETIC ENERGY 2007年第4期41卷 18-29页

作者： Kopyt, Pawel Celuch, Malgorzata Warsaw Univ Technol Inst Radioelect Warsaw Poland

A practical implementation of a hybrid simulation system capable of modeling coupled electromagnetic-thermodynamic problems typical in microwave heating is described. The paper presents two approaches to modeling such problems. Both are based on an fdtd-based commercial electromagnetic solver coupled to an external thermodynamic analysis tool required for calculations of heat diffusion. The first approach utilizes a simple fdtd-based thermal solver while in the second it is replaced by a universal commercial CFD solver. The accuracy of the two modeling systems is verified against the original experimental data as well as the measurement results available in literature.

关键词： Microwave heating coupled numerical modeling fdtd algorithm multiphysics

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A Modified fdtd algorithm for Analysis of Anisotropic Stratified Waveguides and Multilayered Microwave Filters 19

A Modified FDTD Algorithm for Analysis of Anisotropic Strati...

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IEEE 19th Mediterranean Microwave Symposium (MMS)

作者： Laoufi, Mohamed Karim Mekaoui, Slimane Tounsi, Mohamed Lamine Yagoub, Mustapha C. E. USTHB Univ Fac Elect & Informat LCPTS Lab Algiers Algeria USTHB Univ Fac Elect & Informat Algiers Algeria Univ Ottawa EECS Ottawa ON Canada

ISBN: (纸本)9781728140643

In this paper. a modified fdtd algorithm is applied to analyze various anisotropic planar circuits in multilayer configuration via a new formulation of updated equations. This formulation takes into account the bianisotropic character of the substrate. For the first time, the effect of anisotropy on the cutoff frequency and bandwidth of rectangular waveguide is investigated as well as shielding effect on S parameters. Moreover, a new mesh function is proposed to reduce the CPU time. The computed results were compared to available data in literature and simulated results and a good agreement was observed.

关键词： fdtd algorithm anisotropy waveguide filter mesh function

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Cell light scattering characteristic numerical simulation research based on fdtd algorithm

Cell light scattering characteristic numerical simulation re...

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International Conference on Innovative Optical Health Science

作者： Lin, Xiaogang Wan, Nan Zhu, Hao Weng, Lingdong Chongqing Univ Key Lab Optoelect Technol & Syst Minist Educ China Chongqing 400044 Peoples R China

ISBN: (数字)9781510609921

ISBN: (纸本)9781510609914;9781510609921

In this study, finite-difference time-domain (fdtd) algorithm has been used to work out the cell light scattering problem. Before beginning to do the simulation contrast, finding out the changes or the differences between normal cells and abnormal cells which may be cancerous or maldevelopment is necessary. The preparation of simulation are building up the simple cell model of cell which consists of organelles, nucleus and cytoplasm and setting up the suitable precision of mesh. Meanwhile, setting up the total field scattering field source as the excitation source and far field projection analysis group is also important. Every step need to be explained by the principles of mathematic such as the numerical dispersion, perfect matched layer boundary condition and near-far field extrapolation. The consequences of simulation indicated that the position of nucleus changed will increase the back scattering intensity and the significant difference on the peak value of scattering intensity may result from the changes of the size of cytoplasm. The study may help us find out the regulations based on the simulation consequences and the regulations can be meaningful for early diagnosis of cancers.

关键词： fdtd algorithm cell model nucleus back scattering intensity

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A Strategy for Parallel Implementation of the fdtd algorithm 3

A Strategy for Parallel Implementation of the FDTD Algorithm

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2002 3rd International Symposium on Electromagnetic Compatibility

作者： XUE Zhenghui GAO Benqing ZHANG Zejie Beijing Institute of Technology

ISBN: (纸本)0780372778

This paper introduced a strategy for parallel implementation of the fdtd algorithm using COW(Cluster of Workstation) parallel computing system. Some computing examples were given to prove the feasibility,correctness and high efficiency of this method. This method provides a solve-scheme for the EM computation of electrically large-size complex object and can be used in EMC analysis.

关键词： fdtd algorithm COW(Cluster of Workstation) parallel computing system PVM parallel computing

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Research on Electromagnetic Characteristics of Metamaterial based on fdtd algorithm and Physical Model

Research on Electromagnetic Characteristics of Metamaterial ...

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2023 IEEE Global Conference on Information Technologies and Communications, GCITC 2023

作者： Zhang, Jing Heilongjiang University of Technology School of Electrical and Information Engineering JiXi158100 China

ISBN: (纸本)9798350308167

The role of electromagnetic properties in the properties of meta materials is very important, but there is a problem of inaccurate evaluation of results. The light transformation theory cannot solve the problem of electromagnetic properties in the properties of meta materials, and the evaluation is unreasonable. Therefore, an fdtd algorithm and physical model is proposed for electromagnetic characteristic analysis. Firstly, the rotation equation theory is used to evaluate the meta material, and the index is divided according to the electromagnetic characteristics to reduce the electromagnetic characteristics in the interfering factor. Then, the rotation equation theory analyzes the electromagnetic characteristics, forms an electromagnetic characteristic scheme, and synthesizes the electromagnetic characteristics, results Analyses. MATLAB simulation shows that under certain evaluation criteria, fdtd algorithm and physical model for meta materials The accuracy of electromagnetic characteristics and the time of electromagnetic characteristics is better than the light transformation theory. © 2023 IEEE.

关键词： Electromagnetic properties fdtd algorithm physical models rotation equation theory

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Study of Non-Gaussian Scattering Characteristic Based on fdtd algorithm for Rough Sea Surface

Study of Non-Gaussian Scattering Characteristic Based on FDT...

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4th IEEE Conference on Industrial Electronics and Applications

作者： Gao Guoxing Wang Zhenzhan Chen Biao Xu Suqin Song Rugang Chinese Acad Sci Ctr Space Sci & Appl Res Beijing Peoples R China Navy Submarine Acad Qingdao Peoples R China

ISBN: (纸本)9781424427994

A study of simulation for non-Gaussian sea surface by introducing into the wave profile equation a directional function feasible is presented. A classical finite-difference time-domain (fdtd) algorithm was applied to calculate the scattered field based upon the simulation sea surface data, however, a sample yet effective approach proposed to separate the scattered field from the total field influenced by the incidence wave;the effect is more evident. Then, the far field scattering coefficient is calculated and compared with that of integral equation model (IEM) method.

关键词： non-Gaussian sea surface fdtd algorithm model of scattering sea surface

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PROPERTIES OF THE fdtd METHOD RELEVANT TO THE ANALYSIS OF MICROWAVE POWER PROBLEMS

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JOURNAL OF MICROWAVE POWER AND ELECTROMAGNETIC ENERGY 2007年第4期41卷 62-80页

作者： Celuch, Malgorzata Gwarek, Wojciech K. Warsaw Univ Technol Inst Radioelect Warsaw Poland

The objective of the paper is to provide a systematic consideration and generalization of properties and features of the fdtd method in the context of its use in solving microwave power problems. This is aimed at filling the gap between the general theory of the fdtd method and the specific practice of its applications by microwave power engineers. The paper starts with a comparison of fdtd to other methods like FEM, from the perspective of microwave power simulations. It then discusses fdtd-specific models of lossy and dispersive media, conformal boundaries, field singularities, and modal excitation as well as error bounds due to numerical dispersion. Theoretical overview is illustrated with examples. References are provided to the literature where more details and application notes can be found.

关键词： fdtd algorithm microwave heating numerical modeling

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Electromagnetic coupling between arbitrarily bent wires and scatterers analysed by a hybrid MoMTD/fdtd approach

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IEE PROCEEDINGS-MICROWAVES ANTENNAS AND PROPAGATION 2000年第4期147卷 261-266页

作者： Cerri, G Chiarandini, S Russo, P Schiavoni, A Univ Ancona Dipartimento Elettron & Automat I-60131 Ancona Italy Ctr Studi & Lab Telecomun SpA CSELT I-10140 Turin Italy

The payer presents a new hybrid method for efficiently studying the coupling between an antenna and an inhomogeneous penetrable object, lying in the near field region of the source. It is based on the combination of the marching on in time version of the method of moment (MoMTD), and the finite-difference in time-domain (fdtd) algorithm. The use of the equivalence principle leads to the treatment of the original complex problem as the interaction of two simpler subproblems, each of them approached differently. The hybrid method is validated by comparing our results obtained for significant strong coupling cases with data computed by other numerical techniques and with experimental values.

关键词： Antenna theory finite difference time-domain analysis method of moments near field region electromagnetic coupling Electromagnetic wave propagation fdtd algorithm inhomogeneous penetrable object hybrid MoMTD/fdtd approach bent wires marching on in time version antenna electromagnetic wave scattering finite-difference time-domain algorithm antenna theory subproblems Other numerical methods scatterers equivalence principle

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fdtd Simulation Based on Spark Resistance Formula for Electromagnetic Fields due to Spark between Charged Metal Bars with Ferrite Core Attachment

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IEICE TRANSACTIONS ON COMMUNICATIONS 2009年第6期E92B卷 1960-1964页

作者： Taira, Soichiro Fujiwara, Osamu Nagoya Inst Technol Grad Sch Engn Nagoya Aichi 4668555 Japan

The electromagnetic fields emitted from an electrostatic discharge (ESD) event occurring between charged metals cause seriously damage high-tech equipment. In order to clarify the generation mechanism of such ESD fields and also to reduce them, we previously proposed a finite-difference time-domain (fdtd) algorithm based on a delta-gap feeding method and a frequency dispersion characteristic formula (Naito's formula) of ferrite material for simulating the ESD fields due to a spark between the charged metals with ferrite core attachment. In the present study, by integrating the above fdtd algorithm and a spark-resistance formula, we simulated both of the ESD itself and the resultant fields for the metal bars with ferrite core attachment, and demonstrated that the core attachment close to the spark gap suppresses the magnetic field level. This finding was also validated via 6-GHz wide-band measurement of the magnetic near-field.

关键词： ESD metal bar ferrite core attachment Naito's formula spark-resistance formula fdtd algorithm

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