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 ... 1881 Page 4. References [1] E. Jorgensen, OS Kim, P ... 3, p. 238, July 2005. [4] L. Li, Z. Liu, Z. Dong, J. Thompson, and L. Carin, ???Scalable multilevel fast multipole method for multiple targets in the vicinity of a half space,??? IEEE Trans. Geosci. Remote Sensing, vol. 41, no. 4, pp. ...
2006 IEEE Antennas and Propagation Society International Symposium, 2006
Abstract In this paper, we propose a novel loop extraction algorithm that significantly outperfor... more Abstract In this paper, we propose a novel loop extraction algorithm that significantly outperforms other computational electromagnetics methods. Since the algorithm does not involve loop independence tests and the rejection of candidate loops, it is also more ...
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 In this paper, we summarize the results of our efforts in developing a scalable dis-tributed memory fast electromagnetic integral equation solver. The massively paral-lel scattering code, called LSSP, is based on a Galerkin discretization of the combined field integral equation (CFIE) ...
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
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
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's function is developed
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
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
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
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 ... 1881 Page 4. References [1] E. Jorgensen, OS Kim, P ... 3, p. 238, July 2005. [4] L. Li, Z. Liu, Z. Dong, J. Thompson, and L. Carin, ???Scalable multilevel fast multipole method for multiple targets in the vicinity of a half space,??? IEEE Trans. Geosci. Remote Sensing, vol. 41, no. 4, pp. ...
2006 IEEE Antennas and Propagation Society International Symposium, 2006
Abstract In this paper, we propose a novel loop extraction algorithm that significantly outperfor... more Abstract In this paper, we propose a novel loop extraction algorithm that significantly outperforms other computational electromagnetics methods. Since the algorithm does not involve loop independence tests and the rejection of candidate loops, it is also more ...
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 In this paper, we summarize the results of our efforts in developing a scalable dis-tributed memory fast electromagnetic integral equation solver. The massively paral-lel scattering code, called LSSP, is based on a Galerkin discretization of the combined field integral equation (CFIE) ...
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
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
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's function is developed
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
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
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
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