Weng Cho CHEW

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Jelel Ezzine

University of Tunis El Manar

K.A.Narayanankutty Kotheneth

Amrita Vishwa Vidyapeetham

Jorge Costa

ISCTE - University Institute of Lisbon (ISCTE-IUL)

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Universitat de València

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Kansas State University

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Badji Mokhtar - Annaba University

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National Institute of Technology, Calicut

Noor Azwan Shairi

Universiti Teknikal Malaysia Melaka

Viacheslav Kuleshov

Stockholm University

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Papers by Weng Cho CHEW

Multipole-free fast multilevel algorithm for layered media

2006 IEEE Antennas and Propagation Society International Symposium, 2006

... 1881 Page 4. References [1] E. Jorgensen, OS Kim, P ... 3, p. 238, July 2005. [4] L. Li, Z. L... more

A Linear-Time Algorithm for Extracting Tree and Loop Bases in Computational Electromagnetics

2006 IEEE Antennas and Propagation Society International Symposium, 2006

Abstract In this paper, we propose a novel loop extraction algorithm that significantly outperfor... more

The Fast Illinois Solver Code: requirements and scaling properties

IEEE International Conference on Computational Science and Engineering, 1998

ABSTRACT

Error analysis of scattering amplitudes and RCS

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2002

ABSTRACT

A new approach for controlling truncation error of the multipole expansion

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2002

ABSTRACT

Error Control for the 3-D FIPWA in Complex Media

2005 IEEE Antennas and Propagation Society International Symposium, 2005

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Improvement for scattering by a thin dielectric sheet using surface integral equation

2005 IEEE Antennas and Propagation Society International Symposium, 2005

A modified D-field surface integral equation (SIE),which can be easily solved by the method of mo... more A modified D-field surface integral equation (SIE),which can be easily solved by the method of moments (MoM), is given for scattering by a thin dielectric sheet (TDS). This new TDS integral equation takes both tangential and normal currents into account. In addition, surface charge is considered as well. Using both RWG and pulse basis functions, tangential and normal currents can be solved simultaneously. Numerical examples are compared to the Mie series and volume integral equation (VIE) solutions. Improvement and agreement are achieved by this new method, especially when the dielectric constant is low.

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Scalable electromagnetic scattering computations

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2002

In this paper, we summarize the results of our efforts in developing a scalable dis-tributed memo... more

Three-dimensional microwave imaging by local shape function method with CGFFT

IEEE Antennas and Propagation Society International Symposium. 1996 Digest, 1996

The use of scattered electromagnetic waves to determine the internal material properties of objec... more The use of scattered electromagnetic waves to determine the internal material properties of objects is a much-studied problem. We propose the local shape function method (LSF) with the CGFFT T-matrix method to reconstruct the object permittivity in three dimensions. The algorithm accounts for multiple scattering by casting the inverse problem into a minimization problem, and iteratively minimizing the difference between

VECTOR POTENTIAL ELECTROMAGNETICS WITH GENERALIZED GAUGE FOR INHOMOGENEOUS MEDIA: FORMULATION (Invited Paper)

Progress In Electromagnetics Research, 2014

The mixed vector and scalar potential formulation is valid from quantum theory to classical elect... more The mixed vector and scalar potential formulation is valid from quantum theory to classical electromagnetics. The present rapid development in quantum optics applications calls for electromagnetic solutions that straddle both the quantum and classical physics regimes. The vector potential formulation using A and Φ (or A-Φ formulation) is a good candidate to bridge these two regimes. Hence, there is a need to generalize this formulation to inhomogeneous media. A generalized gauge is suggested for solving electromagnetics problems in inhomogenous media that can be extended to the anistropic case. An advantage of the resulting equations is their absence of catastrophic breakdown at low-frequencies. Hence, the usual differential equation solvers can be used to solve them over a wide range of scales and bandwidth. It is shown that the interface boundary conditions from the resulting equations reduce to those of classical Maxwell's equations. Also, the classical Green's theorem can be extended to such a formulation, resulting in an extinction theorem and a surface equivalence principle similar to the classical case. Moreover, surface integral equation formulations can be derived for piecewise homogeneous scatterers. Furthermore, the integral equations neither exhibit the low-frequency catastrophe nor the frequency imbalance observed in the classical formulation using E-H fields. The matrix representation of the integral equation for a PEC (perfect electric conductor) scatterer is given.

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Resonance frequency of a rectangular microstrip patch

IEEE Transactions on Antennas and Propagation, 1988

The microstrip-patch resonant frequency problem is formulated in terms of an integral equation us... more The microstrip-patch resonant frequency problem is formulated in terms of an integral equation using vector Fourier transforms. Using Galerkin's method in solving the integral equation, the resonant frequency of the microstrip patch is studied with both Chebyshev polynomials and sinusoidal functions as basis functions. In the case of the Chebyshev polynomials, the edge singularity is included, but it is not

Thin-stratified medium fast-multipole algorithm (TSMFMA) for Solving 2.5D microstrip structures

2008 IEEE Antennas and Propagation Society International Symposium, 2008

An accurate and efficient technique called the thin-stratified medium fast-multipole algorithm (T... more An accurate and efficient technique called the thin-stratified medium fast-multipole algorithm (TSM-FMA) is presented for solving integral equations pertinent to electromagnetic analysis of microstrip structures, which consists of the full-wave analysis method and the application of the multilevel fast multipole algorithm (MLFMA) to thin stratified structures. In this approach, a new form of the electric-field spatial-domain Green&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#x27;s function is developed

A high-frequency approximation for random rough surface problems

IEEE Antennas and Propagation Society Symposium, 2004., 2004

ABSTRACT

Keynote speaker 1: Computational electromagnetics: Past, present, and future

2015 IEEE International Conference on Computational Electromagnetics, 2015

Fast algorithm for electromagnetic scattering by buried 3-D dielectric objects of large size

IEEE Transactions on Geoscience and Remote Sensing, 1999

A fast algorithm for electromagnetic scattering by buried three dimensional (3-D) dielectric obje... more A fast algorithm for electromagnetic scattering by buried three dimensional (3-D) dielectric objects of large size is presented by using the conjugate gradient (CG) method and fast Fourier transform (FFT). In this algorithm, the Galerkin method is utilized to discretize the electric field integral equations, where rooftop functions are chosen as both basis and testing functions. Different from the 3-D

Fast evaluation of Sommerfeld integrals for EM scattering and radiation by three-dimensional buried objects

IEEE Transactions on Geoscience and Remote Sensing, 1999

This paper presents a fast method for electromagnetic scattering and radiation problems pertinent... more This paper presents a fast method for electromagnetic scattering and radiation problems pertinent to three-dimensional (3D) buried objects. In this approach, a new symmetrical form of the Green's function is derived, which can reduce the number of Sommerfeld integrals involved in the buried objects problem. The integration along steepest descent paths and leading-order approximations are introduced to evaluate these Sommerfeld

A novel array laterolog method

SEG Technical Program Expanded Abstracts 1997, 1997

Development and Testing of the Time-Domain Microwave Nondestructive Evaluation System

Review of Progress in Quantitative Nondestructive Evaluation, 1998

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An Impulse Radar Nondestructive Evaluation System

Review of Progress in Quantitative Nondestructive Evaluation, 1997

Comparing Xpatch, FISC, and ScaleME using a cone-cylinder

IEEE Antennas and Propagation Society Symposium, 2004., 2004

Many people that use computational electromagnetics to produce data are interested in two factors... more Many people that use computational electromagnetics to produce data are interested in two factors: speed and accuracy. To appreciate the tradeoff, it is imperative that data creation be well understood. The speed and accuracy tradeoff produces error sources. The paper compares data produced using high frequency techniques and the method of moments (MoM) accelerated by the multilevel fast multipole algorithm

Multipole-free fast multilevel algorithm for layered media

2006 IEEE Antennas and Propagation Society International Symposium, 2006

... 1881 Page 4. References [1] E. Jorgensen, OS Kim, P ... 3, p. 238, July 2005. [4] L. Li, Z. L... more

A Linear-Time Algorithm for Extracting Tree and Loop Bases in Computational Electromagnetics

2006 IEEE Antennas and Propagation Society International Symposium, 2006

Abstract In this paper, we propose a novel loop extraction algorithm that significantly outperfor... more

The Fast Illinois Solver Code: requirements and scaling properties

IEEE International Conference on Computational Science and Engineering, 1998

ABSTRACT

Error analysis of scattering amplitudes and RCS

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2002

ABSTRACT

A new approach for controlling truncation error of the multipole expansion

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2002

ABSTRACT

Error Control for the 3-D FIPWA in Complex Media

2005 IEEE Antennas and Propagation Society International Symposium, 2005

Download

Improvement for scattering by a thin dielectric sheet using surface integral equation

2005 IEEE Antennas and Propagation Society International Symposium, 2005

Download

Scalable electromagnetic scattering computations

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2002

In this paper, we summarize the results of our efforts in developing a scalable dis-tributed memo... more

Three-dimensional microwave imaging by local shape function method with CGFFT

IEEE Antennas and Propagation Society International Symposium. 1996 Digest, 1996

VECTOR POTENTIAL ELECTROMAGNETICS WITH GENERALIZED GAUGE FOR INHOMOGENEOUS MEDIA: FORMULATION (Invited Paper)

Progress In Electromagnetics Research, 2014

Download

Resonance frequency of a rectangular microstrip patch

IEEE Transactions on Antennas and Propagation, 1988

Thin-stratified medium fast-multipole algorithm (TSMFMA) for Solving 2.5D microstrip structures

2008 IEEE Antennas and Propagation Society International Symposium, 2008

A high-frequency approximation for random rough surface problems

IEEE Antennas and Propagation Society Symposium, 2004., 2004

ABSTRACT

Keynote speaker 1: Computational electromagnetics: Past, present, and future

2015 IEEE International Conference on Computational Electromagnetics, 2015

Fast algorithm for electromagnetic scattering by buried 3-D dielectric objects of large size

IEEE Transactions on Geoscience and Remote Sensing, 1999

Fast evaluation of Sommerfeld integrals for EM scattering and radiation by three-dimensional buried objects

IEEE Transactions on Geoscience and Remote Sensing, 1999

A novel array laterolog method

SEG Technical Program Expanded Abstracts 1997, 1997

Development and Testing of the Time-Domain Microwave Nondestructive Evaluation System

Review of Progress in Quantitative Nondestructive Evaluation, 1998

Download

An Impulse Radar Nondestructive Evaluation System

Review of Progress in Quantitative Nondestructive Evaluation, 1997

Comparing Xpatch, FISC, and ScaleME using a cone-cylinder

IEEE Antennas and Propagation Society Symposium, 2004., 2004

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