Scattering From Complex Bodies of Revolution Using a High-Order Mixed Finite Element Method and Locally-Conformal Perfectly Matched Layer

Zhai, Yong Bo; Xue, Ping; Cui, Tie Jun

doi:10.1109/tap.2011.2122224

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Monte-Carlo-based characteristic basis FEM [18] was adopted by Ozgun to examine scattering from an object above a rough sea surface. A highorder mixed FEM with PML [19] was used to analyze scattering from complex bodies of revolution. However, the approximate absorbing boundaries often need to be set far enough away from the model surface and are sometimes only applicable to some particular problems to keep their precision.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Multiregion FEM-BIM for Composite Scattering From an Arbitrary Dielectric Target Above Dielectric Rough Sea Surfaces

Guo

2015

IEEE Trans. Geosci. Remote Sensing

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An efficient multiregion hybrid method of the finite element method (FEM) combined with the boundary integral method (FEM-BIM) is first proposed for the fast simulation of 2-D scattering from an arbitrary dielectric target above a "Pierson-Moskowitz" rough sea surface. In the implementation of the multiregion hybrid method, the entire model is divided into multiple computational regions depending on energy distribution of an incident wave. With mutual coupling between the target and the dominant region of the sea considered, FEM and BIM are respectively applied to study the target and the dominant region to exactly obtain electromagnetic fields and currents, which have powerful illuminated field and strong interaction with each other. Mutual coupling between different subordinate regions is approximately considered by field integral equations based on Kirchhoff approximation by which the approximate currents in subordinate regions can be obtained. Because FEM and BIM are only performed on the target and the dominant region of the sea, the number of unknowns and the time required in the new method are dramatically reduced than those in the traditional FEM-BIM, making the hybrid method more efficient in the simulation of the composite problem. Index Terms-Electromagnetic scattering, finite element method boundary integral method (FEM-BIM), Kirchhoff approximation (KA), rough surface. Li-Xin Guo (S'95-M'03) received the M.S. degree in radio science from Xidian University, He is currently a Professor and the Head of the School of Physics and Optoelectronic Engineering with Xidian University. His research interests mainly include wave propagation and scattering in complex system, computational electromagnetics, and fractal electrodynamics. Run-Wen Xu received the B.S. degree in physics from Liaocheng University, Liaocheng, China, in 2010. He is currently working toward the Ph.D. degree in the School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China.His research interests are mainly in the field of computational electromagnetics.

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Section: Introductionmentioning

confidence: 99%

An Efficient Multiregion FEM-BIM for Composite Scattering From an Arbitrary Dielectric Target Above Dielectric Rough Sea Surfaces

Guo

2015

IEEE Trans. Geosci. Remote Sensing

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“…The finite element method (FEM) can easily be used for analyzing complex dielectric problems because of its powerful ability to model inhomogeneous materials that may be difficult to solve by the classical BIM. In traditional applications of FEM, approximate absorbing boundaries, such as ABC [5,6] and PML [7][8][9][10], were usually adopted to truncate the infinite domain when electromagnetic scattering problems were discussed with FEM. FEM/PML was used to simulate the bistatic scattering from a PEC object above the rough sea surface [7].…”

Section: Introductionmentioning

confidence: 99%

Application of Hybrid Finite Element-Boundary Integral Algorithm for Solving Electromagnetic Scattering from Multiple Objects over Rough Sea Surface

Guo

2014

International Journal of Antennas and Propagation

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A hybrid algorithm of the finite element method (FEM) is presented to solve two-dimensional (2D) scattering from multiple dielectric objects above the rough sea surface. Compared with traditional FEM based on approximate absorbing boundaries, FEM based on the boundary integral method (BIM) can reduce the calculational region and solution time of the scattering problem. In the hybrid method, the whole computational region is divided into the sea surface and multiple isolate interior regions for the dielectric objects. FEM is only used to simulate the scattering from multiple interior regions enclosing the objects, whereas the large sea is considered exactly by BIM. The coupled interaction among the isolate interior regions and the sea can be taken into account by BIM. The hybrid technique presented here is efficient and versatile for addressing scattering from multiple arbitrary targets above rough sea surfaces. Scattering properties of multiple dielectric objects above the sea surface under different conditions are discussed in detail.

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“…On the other hand, the finite element method is one of the most appealing numerical methods for the analysis of electromagnetic problems, especially for complex dielectric structures. In an unbounded computational region, approximate absorbing boundaries are always applied for truncated boundaries, and most works are focused on targets of a limited size or conducting rough surfaces, such as absorbing boundary condition (ABC) [6] and perfectly matched layer (PML) [7]. Liu and Jin introduced FEM/PML in [8] to discuss the scattering from a rough surface, and they studied bistatic scattering from a target at the low altitude above a conducting rough sea surface.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Scattering From Dielectric Rough Surfaces by Hybrid Fem/Bie

Xu¹,

Guo²,

Meng³

2014

PIER M

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To study electromagnetic scattering from dielectric rough surfaces, a hybrid finite element method (FEM) combined with boundary integral equations (BIE) is extended to the scattering problem with two half-open regions. Integral boundaries, as truncated boundaries of the FEM region, are employed as artificial boundaries of dielectric rough surfaces above and below the rough surface. In the hybrid method, conformal integral boundaries are introduced to reduce the computational region. The validity of our hybrid method is examined by available solutions got from the method of moment (MoM), which indicates the feasibility of our scheme in simulating the scattering from dielectric rough surfaces. Bistatic scattering coefficient from dielectric rough surfaces is studied in this paper for both polarizations, and functional dependence upon different parameters are numerically discussed.

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Scattering From Complex Bodies of Revolution Using a High-Order Mixed Finite Element Method and Locally-Conformal Perfectly Matched Layer

Cited by 5 publications

References 11 publications

An Efficient Multiregion FEM-BIM for Composite Scattering From an Arbitrary Dielectric Target Above Dielectric Rough Sea Surfaces

An Efficient Multiregion FEM-BIM for Composite Scattering From an Arbitrary Dielectric Target Above Dielectric Rough Sea Surfaces

Application of Hybrid Finite Element-Boundary Integral Algorithm for Solving Electromagnetic Scattering from Multiple Objects over Rough Sea Surface

Analysis of Scattering From Dielectric Rough Surfaces by Hybrid Fem/Bie

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