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    "Numerical techniques in electromagnetics and communications". A PC based third year undergraduate subject for microelectronic engineers,

    Thiel, D.V. ; Jun Wei Lu
    Antennas and Propagation Society International Symposium, 1994. AP-S. Digest

    Volume: 1
    DOI: 10.1109/APS.1994.407819
    Publication Year: 1994 , Page(s): 111 - 114 vol.1
    Cited by:  Papers (2)

    IEEE Conference Publications

    The School of Microelectronic Engineering at Griffith University graduated its first engineers at the end of 1993. One of the two majors offered to students is Communications Engineering which includes the subject "Numerical Techniques in Electromagnetics and Communications". Exercises and assignments in this course are PC based. This paper describes the subject content, teaching methods, assessment methods and gives anecdotal evidence as to its success. Examples of assignments and solutions are presented.<> View full abstract»

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    Special Issue on Advanced Numerical Techniques in Electromagnetics Guest Editorial

    Graglia, R.D. ; Luebbers, R.J. ; Wilton, D.R.
    Antennas and Propagation, IEEE Transactions on

    Volume: 45 , Issue: 3
    DOI: 10.1109/TAP.1997.558647
    Publication Year: 1997 , Page(s): 313 - 315
    Cited by:  Papers (1)

    IEEE Journals & Magazines

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    A proposed course on numerical techniques in electromagnetics

    Sadiku, M.N.O.
    Education, IEEE Transactions on

    Volume: 33 , Issue: 1
    DOI: 10.1109/13.53626
    Publication Year: 1990 , Page(s): 47 - 50
    Cited by:  Papers (5)

    IEEE Journals & Magazines

    A description is given of the establishment and content of a senior/first-year graduate course in numerical methods in electromagnetics. Examples of sample problems suitable for the course are presented. The problems encountered in offering such a course and suggestions for improvements are discussed View full abstract»

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    A numerical scheme for frontal solution in cooperation with substructure technique for 3D electromagnetic analysis

    Yang Zhao ; Kye Yak See
    Antennas and Propagation Society International Symposium, 2004. IEEE

    Volume: 4
    DOI: 10.1109/APS.2004.1330266
    Publication Year: 2004 , Page(s): 4156 - 4159 Vol.4

    IEEE Conference Publications

    The wave-front technique is used for the finite element method (FEM) in mechanics and is efficient in the numerical solution of large linear equations. However, it is not so widely used for electromagnetic (EM) analysis since the characteristics of element matrix equations are quite different, or, in other words, the "front" width for calculating an EM problem is larger than that of a mechanics problem, which affects computational efficiency greatly. For example, unlike mechanical FEM, electromagnetic FEM often deals with irregular elements which results in a large value of "front" width for storing element coefficients and is hard to control. The frontal solution is still in limited application in electromagnetic computation, unlike other methods such as iteration methods in numerical schemes. The paper presents the wave-front method combined with a substructure technique for 3D electromagnetic computation; analysis and a numerical example show that it has good accuracy and computing efficiency, while keeping the advantage of being without convergence problems. View full abstract»

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    A numerical TRL de-embedding technique for the extraction of S-parameters in a 2/sup 1/2/D planar electromagnetic simulator

    Linot, B. ; Wong, M.F. ; Hanna, V.F. ; Picon, O.
    Microwave Symposium Digest, 1995., IEEE MTT-S International

    DOI: 10.1109/MWSYM.1995.405984
    Publication Year: 1995 , Page(s): 809 - 812 vol.2
    Cited by:  Papers (2)

    IEEE Conference Publications

    A numerical application of the TRL calibration for a planar discontinuity is proposed to be used in electromagnetic simulators in order to calculate its scattering matrix without the need of either defining the port characteristic impedance as in the slotted line numerical simulation or of normalising with respect to a specified value of reference impedance as in other known de-embedding methods. The proposed technique is applied, in a 2/sup 1/2/D planar electromagnetic simulator using integral equations technique solved by the moment method, on a case study of a step in width coplanar waveguide discontinuity and the authors have demonstrated how many numerical problems encountered previously when using other techniques were eliminated.<> View full abstract»

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    Electromagnetic dosimetry for models of humans and animals: A review of theoretical and numerical techniques

    Durney, C.H.
    Proceedings of the IEEE

    Volume: 68 , Issue: 1
    DOI: 10.1109/PROC.1980.11578
    Publication Year: 1980 , Page(s): 33 - 40
    Cited by:  Papers (31)  |  Patents (1)

    IEEE Journals & Magazines

    Theoretical dosimetry, i.e., calculation of the electromagnetic (EM) energy absorbed by humans in radiation fields, has become increasingly important as the use of EM devices in our society has increased. Since such calculations are difficult and complicated, a number of EM analysis techniques have been used by researchers in the field to obtain dosimetric data and understanding of absorption characteristics. Both analytical and numerical EM techniques have been applied extensively. In this paper, important techniques are reviewed and significant dosimetric data are summarized. Some important areas of future research in EM dosimetry are discussed. View full abstract»

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    A comparison of numerical techniques for modeling electromagnetic dispersive media

    Siushansian, R. ; LoVetri, J.
    Microwave and Guided Wave Letters, IEEE

    Volume: 5 , Issue: 12
    DOI: 10.1109/75.481849
    Publication Year: 1995 , Page(s): 426 - 428
    Cited by:  Papers (24)

    IEEE Journals & Magazines

    A comparison of various time domain numerical techniques to model material dispersion is presented. Methods that model the material dispersion via a convolution integral as well as those that use a differential equation representation are considered. We have shown how the convolution integral arising in the electromagnetic constitutive relation can be approximated by the trapezoidal rule of numerical integration and implemented using a newly derived one-time-step recursion relation. The superiority of the new method, in terms of accuracy and computer resources, over four previously published techniques is demonstrated on the problem of a transient electromagnetic plane wave propagating in a dispersive media. All of the methods considered are easily incorporated into 3-D codes where the requirement for efficiency is very important View full abstract»

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    The Teaching of Numerical Techniques in Computational Electromagnetics

    Jingguo, W.
    Electromagnetic Field Computation, 1992. Digest of the Fifth Biennial IEEE Conference on

    DOI: 10.1109/CEFC.1992.720858
    Publication Year: 1992 , Page(s): WP43

    IEEE Conference Publications

    Summary from only given, as follows. This paper presents the author's teaching experiences on Numerical Techniques in Computational Electromagnetics for years, which includes course descriptions and objectives as well as the relation with engineering practice, etc. View full abstract»

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    The teaching of numerical techniques in computational electromagnetics

    Xiang Cui ; Wang, J. ; Shao, H.
    Education, IEEE Transactions on

    Volume: 36 , Issue: 2
    DOI: 10.1109/13.214710
    Publication Year: 1993 , Page(s): 261 - 265

    IEEE Journals & Magazines

    The authors' teaching experiences with numerical techniques in computational electromagnetics are described. Course descriptions and objectives are discussed, as well as their relationship to engineering practice View full abstract»

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    Electromagnetic susceptibility analysis in device level with numerical technique based on electric field integral equation

    Wei Liang Yuan ; Erping Li
    Electromagnetic Compatibility, 2004. EMC 2004. 2004 InternationalSymposium on

    Volume: 1
    DOI: 10.1109/ISEMC.2004.1350005
    Publication Year: 2004 , Page(s): 102 - 106 vol.1
    Cited by:  Papers (2)

    IEEE Conference Publications

    With the advance in high-speed electronics and the presence of new standards on electromagnetic susceptibility, EMS analysis and evaluation is becoming increasingly important. This paper investigates EMS of shielded electronic equipment in the device level by using a full-wave numerical technique combined with a circuit-based method. The method of moments in terms of the mixed-potential electric field integral equation for the geometries of arbitrary combined wire/surface is developed for susceptibility evaluation. With numerical analysis, the effect of external EM noise on electronic equipment is characterized and an equivalent secondary source model is extracted for further EMS analysis of internal high-speed susceptible circuits at a lower board level. View full abstract»

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    An efficient electromagnetic-physics-based numerical technique for modeling and optimization of high-frequency multifinger transistors

    Hussein, Y.A. ; El-Ghazaly, S.M. ; Goodnick, S.M.
    Microwave Theory and Techniques, IEEE Transactions on

    Volume: 51 , Issue: 12
    DOI: 10.1109/TMTT.2003.820160
    Publication Year: 2003 , Page(s): 2334 - 2346
    Cited by:  Papers (11)

    IEEE Journals & Magazines

    We present a fast wavelet-based time-domain modeling technique to study the effect of electromagnetic (EM)-wave propagation on the performance of high-power and high-frequency multifinger transistors. The proposed approach solves the active device model that combines the transport physics, and Maxwell's equations on nonuniform self-adaptive grids, obtained by applying wavelet transforms followed by hard thresholding. This allows forming fine and coarse grids in the locations where variable solutions change rapidly and slowly, respectively. A CPU time reduction of 75% is achieved compared to a uniform-grid case, while maintaining the same degree of accuracy. After validation, the potential of the developed technique is demonstrated by EM-physical modeling of multifinger transistors. Different numerical examples are presented, showing that accurate modeling of high-frequency devices should incorporate the effect of EM-wave propagation and electron-wave interactions within and around the device. Moreover, high-frequency advantages of multifinger transistors over single-finger transistors are underlined through numerical examples. To our knowledge, this is the first time in the literature a fully numerical EM-physics-based simulator for accurate modeling of high-frequency multifinger transistors is introduced and implemented. View full abstract»

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    Numerical technique of non stationary electromagnetic theory

    Sirenko, Y. ; Yashina, Nataliya
    Mathematical Methods in Electromagnetic Theory, 1996., 6th International Conference on

    DOI: 10.1109/MMET.1996.565711
    Publication Year: 1996 , Page(s): 275 - 276

    IEEE Conference Publications

    Initial boundary value problems (ibvp) and boundary value problems (bvp) for Maxwell's system of differential equations are the subjects under investigation in electromagnetic theory. That is the starting mathematical model of physical processes, and it is necessary by means of mathematical techniques to extract and treat the physical results. The main subject of the present communication is the review of modern methods and algorithms for numerical analyses of transient processes in open compact, waveguide and periodic resonators. Computation of scattering characteristics of elementary discontinuities is of special importance. We have developed specialized algorithms, using formally correct numerical subroutines in key steps of solution construction, including analytical regularization of operator equations of the first kind View full abstract»

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    A numerical technique for analyzing electromagnetic wave scattering from moving surfaces in one and two dimensions

    Harfoush, F. ; Taflove, Allen ; Kriegsmann, G.A.
    Antennas and Propagation, IEEE Transactions on

    Volume: 37 , Issue: 1
    DOI: 10.1109/8.192164
    Publication Year: 1989 , Page(s): 55 - 63
    Cited by:  Papers (22)

    IEEE Journals & Magazines

    The electromagnetic wave scattering properties of a moving, perfectly conducting mirror are analyzed using a numerical technique based on the finite-difference time domain (FD-TD) method. This numerical technique does not require a system transformation where the object is at rest, but gives a solution to the problem directly in the laboratory frame. Two canonical one-dimensional cases are considered, the uniformly moving and the uniformly vibrating mirror. Numerical results for the scattered field spectrum are compared to available analytical results, and an excellent agreement is demonstrated. The ability of the FD-TD model to obtain the physics of the double-Doppler effect (for the uniform translation case), and frequency-modulation-like reflected spectrum (for the uniform vibration case) is highlighted. The method is then extended to two-dimensions where a plane wave at oblique incidence on an infinite vibrating mirror is considered. A good agreement with published results is demonstrated for this case View full abstract»

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    Using numerical techniques in solving electromagnetic problems on complex structures

    Migliozzi, G. ; Sabba, G. ; Tarducci, D.
    Antennas and Propagation Society International Symposium, 2001. IEEE

    Volume: 2
    DOI: 10.1109/APS.2001.959788
    Publication Year: 2001 , Page(s): 572 - 575 vol.2

    IEEE Conference Publications

    We have used the MoM numerical technique to compute electromagnetic far-field patterns radiated from an antenna located on an aircraft complex structure; the results of our simulation were compared to the direct measurements done with a scale model of the antenna fitted on the scaled model aircraft in a large test compact-range, to assess the simulation accuracy and the computational weight. View full abstract»

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    Asymptotic approximations for wave scattering from rough surfaces: Range of valid application as determined by numerical electromagnetic techniques

    Durden, S.L. ; Vesecky, J.F.
    OCEANS '85 - Ocean Engineering and the Environment

    DOI: 10.1109/OCEANS.1985.1160262
    Publication Year: 1985 , Page(s): 308 - 313

    IEEE Conference Publications

    Remote sensing of ocean surface winds and waves is based on knowledge of scattering from rough surfaces. Virtually all remote sensing applications make use of either the physical optics approximation (quasispecular scattering), the small perturbation approximation (Bragg scattering), or the two-scale approximation. Since the criteria for the validity of these approximations are not well understood, we investigate these approximations by numerical electromagnetic techniques. Using the method of moments with Monte Carlo techniques, we calculate the radar cross section for a one-dimensional random rough surface with a given power spectrum. This cross section is then compared with one-dimensional cross sections calculated by physical optics, small perturbation theory, and the two-scale approximation with the goal of finding limits of validity for these approximations. View full abstract»

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    Numerical electromagnetic simulator termination de-embedding technique

    Chen, Q. ; Fusco, V.F.
    Electronics Letters

    Volume: 30 , Issue: 5
    DOI: 10.1049/el:19940284
    Publication Year: 1994 , Page(s): 423 - 424
    Cited by:  Papers (3)

    IET Journals & Magazines

    The authors report a novel approach whereby transmission-line end effects can be assessed by numerical simulation without recourse to the evaluation of the propagation properties of the line interconnecting the termination and excitation signal launch planes. As an example of the new technique, a microstrip open-ended line termination simulated by the finite-difference time-domain method is reported. The simulated results are compared with those obtained for the same structure but by a conventional numerical de-embedding scheme. The method presented is completely general and can be applied to any numerical electromagnetic field simulation method solving one-port or multiport networks View full abstract»

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    Book review - Numerical and asympotic techniques in electromagnetics

    Dudley, D.
    Antennas and Propagation Society Newsletter, IEEE

    Volume: 17 , Issue: 6
    DOI: 10.1109/MAP.1975.27234
    Publication Year: 1975 , Page(s): 13

    IEEE Journals & Magazines

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    Numerical techniques for evaluating electromagnetic field propagators

    Abbas, H.T. ; Shin, J. ; Nevels, R.D.
    Computational Electromagnetics (ICCEM), 2015 IEEE International Conference on

    DOI: 10.1109/COMPEM.2015.7052541
    Publication Year: 2015 , Page(s): 22 - 23

    IEEE Conference Publications

    We review a series of electromagnetic field propagator expressions and their numerical solutions. These include propagators arising from a spectral-frequency domain scalar Helmholtz equation solution evaluated by a Fast Fourier transform numerical method, a full wave vector spectral-spatial domain expression solved by an implicit Fourier transform method, and a full wave time domain tensor field expression solved by an explicit integration technique. It is shown that the tensor field explicit integration method has some computational and accuracy advantages over differential equation finite difference methods. View full abstract»

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    Improvements in numerical techniques for conformal transformation with particular reference to electromagnetic fields

    Murthy Vamaraju, S.R.
    Magnetics, IEEE Transactions on

    Volume: 14 , Issue: 4
    DOI: 10.1109/TMAG.1978.1059753
    Publication Year: 1978 , Page(s): 233 - 240
    Cited by:  Papers (3)

    IEEE Journals & Magazines

    Some significant improvements achieved in numerical methods for conformal transformation applicable to electromagnetic field analysis are reported. It is shown that the basic Schwarz-Christoffel equation, which at each of the vertices always results in either a pole or a zero, can be accurately and efficiently integrated by employing a combination of quadrature methods and simple variable transformations. Other transformations are also described to constrain the t -plane constants as required during the direct-search minimization. The complete procedure developed applies to almost any geometry and is found to be computationally faster and more reliable than previous methods. The procedure is illustrated with the aid of an electrical-machine example specifically to which pertain the numerical results and some of the equations. View full abstract»

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    Numerical techniques in electromagnetic compatibility-oriented design of rail launchers operating with plasma armatures

    Angeli, M. ; Cardelli, E. ; Esposito, N. ; Musolino, A.
    Magnetics, IEEE Transactions on

    Volume: 33 , Issue: 1 , Part: 1
    DOI: 10.1109/20.559952
    Publication Year: 1997 , Page(s): 208 - 212
    Cited by:  Papers (1)

    IEEE Journals & Magazines

    In this paper the electromagnetic interferences radiated from a railgun operating with plasma armatures are studied. The level of emission during the initial explosion of the fuse barrel that forms successively the metallic arc is computed by integrating numerically Maxwell's equations in complete form via a suitable numerical code, written in C++ programming language, and based on a three-dimensional finite difference algorithm in the space and in the time domain. The electric and magnetic field during the acceleration of the plasma armature, successive to its formation, are evaluated by means of a quasi-stationary model based on the assumed transient current distribution in the rails and the armature and on a given relation between the current and the position of the armature. The results indicate that both methods can be considered useful tools in the analysis of the electromagnetic environment around rail launchers View full abstract»

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    Numerical and Experimental Techniques for Body Area Electromagnetics

    Nikita, K.
    Handbook of Biomedical Telemetry

    DOI: 10.1002/9781118893715.ch6
    Copyright Year: 2014

    Wiley-IEEE Press eBook Chapters

    This chapter discusses the electrical properties of human tissues, as well as numerical and physical modeling of the human body, and corresponding numerical and experimental procedures. Electrical properties of each type of tissue result from the interaction between the incident electromagnetic (EM) radiation and the tissue constituents at the cellular and molecular level and control the propagation, attenuation, reflection, and other behavior of EM fields inside and outside the human body. The computational time is usually very long, and it is generally not easy to simulate realistic conditions and include the effects of the surrounding environment. Finally, in order to ensure human safety, recommendations have been set by professional bodies and government agencies on the maximum allowable specific absorption rate (SAR) levels. However, the health hazards occurring from long-term exposure to these new technologies are far from settled. View full abstract»

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    Numerical Investigation of Magnetic Resonant Coupling Technique in Inter-Chip Communication via Electromagnetics-TCAD Coupled Simulation

    Quan Chen ; Ho, S.L. ; Fu, W.N.
    Magnetics, IEEE Transactions on

    Volume: 48 , Issue: 11
    DOI: 10.1109/TMAG.2012.2195300
    Publication Year: 2012 , Page(s): 4253 - 4256
    Cited by:  Papers (1)

    IEEE Journals & Magazines

    Wireless power transfer based on magnetic resonant coupling (MRC) has attracted extensive studies for its applications in macroscopic engineering. In this work, we explore one potential application of MRC in microelectronics, i.e., as an enhancement of inductive coupling for wireless inter-chip communication. Theoretical analysis and numerical simulation are conducted to study the advantages of MRC in power transfer efficiency. In particular, a new EM-semiconductor simulator is employed to provide a faithful description for the interactions between magnetic fields and semiconductor carrier transport. View full abstract»

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    Numerical analysis of electromagnetic scattering by electrically large objects using spatial decomposition technique

    Umashankar, K.R. ; Nimmagadda, S. ; Taflove, Allen
    Antennas and Propagation, IEEE Transactions on

    Volume: 40 , Issue: 8
    DOI: 10.1109/8.163424
    Publication Year: 1992 , Page(s): 867 - 877
    Cited by:  Papers (18)

    IEEE Journals & Magazines

    Apparent computational difficulties with the direct integral equation and method of moments have prompted an alternative numerical solution procedure based on the spatial decomposition technique. Using rigorous electromagnetic equivalence, the spatial decomposition technique virtually divides an electrically large object into a multiplicity of subzones. It permits the maximum size of the method of moments system matrix that needs to be inverted to be strictly limited, regardless of the electrical size of the large scattering object being modeled. The requirement on the computer resources is O(N ), where N is the number of spatial subzones and each subzone is electrically small, spanning on the order of a few wavelengths. Numerical examples are reported along with comparative data and relative error estimation to expose the applicability and limitations of the spatial decomposition technique for the two-dimensional scattering study of electrically large conducting and dielectric objects View full abstract»

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    Global numerical boundary condition based PDE solution techniques for open-region electromagnetic field problems

    Desen Fan, ; Wang, Y.
    Antennas and Propagation, IEEE Transactions on

    Volume: 41 , Issue: 3
    DOI: 10.1109/8.233139
    Publication Year: 1993 , Page(s): 253 - 260
    Cited by:  Papers (4)

    IEEE Journals & Magazines

    The underlying concept and algorithm for global numerical boundary condition (GNBC) based PDE solution techniques for open-region EMF problems are presented. This numerical procedure has been applied with success for various boundary-value problems in scattering, waveguide, and radiation analysis showing distinct advantages in generality, flexibility, and simplicity. All the GNBCs treated are of the first kind, i.e. eigenfunction-based GNBCs View full abstract»

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    Numerical technique for transmission analysis of electromagnetic waves in high-loss media used for microwave imaging of biological functions

    Tomioka, N. ; Ogawa, T. ; Miyakawa, M.
    Biomedical Engineering Conference (CIBEC), 2010 5th Cairo International

    DOI: 10.1109/CIBEC.2010.5716085
    Publication Year: 2010 , Page(s): 247 - 250

    IEEE Conference Publications

    This study is concerned with a technique used for developing a new modality of microwave imaging aiming at noninvasive imaging of biological functions. The paper describes a new technique for transmission analysis of electromagnetic waves in high-loss media. For this purpose, we have combined the equivalent multi-transmission line method in which ion conduction is taken into consideration with the moment method. As a typical problem, this technique has been applied to validate the sandwiched dipole antennas used in microwave imaging by Chirp Pulse Microwave Computed Tomography (CP-MCT). The measurement is done in saline solution to minimize the scattering effects at the body surface. Characteristics of sandwiched dipole antennas developed by trial and error-based learning have been validated almost perfectly by the developed technique. In conclusion, it has been proved that the developed technique is successfully used to find ideal parameters of the antennas which improve the quality in images of CP-MCT. View full abstract»

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