EMI/EMC Computational Modeling Handbook by Bruce R. Archambeault, Omar M. Ramahi, Colin Brench

By Bruce R. Archambeault, Omar M. Ramahi, Colin Brench

The appliance of computational electromagnetics to functional EMI/EMC engineering is an rising expertise. end result of the elevated complexity in EMI/EMC concerns caused by developments in electronics and telecommunications, it really is now not attainable to count completely on conventional suggestions and instruments to unravel the turning out to be checklist of digital engineering layout difficulties.
EMI/EMC Computational Modeling Handbook introduces modeling and simulation of electromagnetics to real-world EMI/EMC engineering. It combines the necessities of electromagnetics, computational suggestions, and real EMI/EMC purposes. incorporated are such well known full-wave computational modeling options because the approach to Moments, Finite-Difference Time area method, Finite aspect strategy, and numerous others. The authors have integrated a myriad of functions for desktops, telecommunications, customer electronics, scientific electronics, and army makes use of.
EMI/EMC Computational Modeling Handbook is a useful reference paintings for training EMI/EMC engineers, digital layout engineers, and any engineer desirous about computational electromagnetics.

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1 Introduction The Finite-Difference Time-Domain (FDTD) method provides a direct integration of Maxwell's time-dependent equations. During the past decade, the FDTD method has gained prominence amongst numerical techniques used in electromagnetic analysis. Its primary appeal is its remarkable simplicity. Furthermore, since the FDTD is a volume-based method, it is exceptionally effective in modeling complex structures and media. However, the distinct feature of the FDTD method, in comparison to the Method of Moments (MoM) and the Finite Elements Method (FEM) (see Chapters 4 and 5) is that it is a time-domain technique.

For instance, if the source of energy has a finite input impedance, after the input excitation pulse is switched off, the current source resembles an open circuit that may not be the desired effect. To remedy this problem, a finite impedance source can be used in FDTD simulations. This is accomplished by satisfying Ohm's law at the FDTD cell where the impedance source is desired. To incorporate the resistive voltage source in an FDTD scheme, we consider a unit Yee cell in three-dimensional space.

18). 54) where k = O)-J~Eo is the wave number. 54) is known as the Helrnholz wave equation. 55) is known as the Laplace equation, which is useful to approximate quasi-static field behavior. In certain electromagnetic applications, such as in the theory and application of waveguides, it is possible to have a current source that generates fields that support either TE or TM behavior. This is typically dictated by the form of excitation used. However, in many other applications, the reduction of the three-dimensional Maxwell's equations to the reduced two-dimensional form is a matter of convenience and practicality.

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