Sparsification of the Reduced Matrix of the CBFM for a Memory Efficient Solution of Electrically Large EM Scattering Problems

2018 ◽  
Author(s):  
Ines Fenni ◽  
Ziad S. Haddad ◽  
Helene Roussel ◽  
Raj Mittra
Keyword(s):  
Efficient Solution ◽  
Em Scattering ◽  
Scattering Problems ◽  
Memory Efficient

Development of CEM in Relation to Subsurface Electromagnetic Scattering

2012 ◽  
Vol 588-589 ◽  
pp. 2166-2170
Author(s):  
Ajaz Amna ◽  
Jia Dong Xu ◽  
Abdul Mueed
Keyword(s):  
Design Process ◽  
Electromagnetic Scattering ◽  
Problem Area ◽  
Subsurface Scattering ◽  
Em Scattering ◽  
Scattering Problems ◽  
Analysis And Design ◽  
Modeling Analysis ◽  
Terrestrial Environments ◽  
Indispensable Tool

Computational Electromagnetic (CEM) techniques have become an indispensable tool in efficient EM modeling, analysis and design process. EM subsurface scattering is a broad field of research with varying degree of complexity. Due level of the obscurity involved in the subsurface scattering investigation, it is therefore considered imperative to explore this problem area of EM for better insight through CEM-based study and models. In this paper, frequency domain CEM techniques are studied which have been tested to provide solution for subsurface scattering problems in terrestrial environments. The development of CEM methods for comparatively more complex problems of scattering from embedded non-metallic inhomogeneity in lossy, rough and layered media remains the focus of this article. The objective here is to provide an overview of CEM development by selecting few examples from the wide area of subsurface EM scattering.

Fast solver for uncertainty EM scattering problems by the perturbed-based MLFMA

2021 ◽  
Vol 122 ◽  
pp. 168-175
Author(s):  
Yu-Sheng Li ◽  
Jun Wan ◽  
Zi He ◽  
Ru-Shan Chen
Keyword(s):  
Em Scattering ◽  
Scattering Problems ◽  
Fast Solver

scholarly journals The MLFMA Equipped with a Hybrid Tree Structure for the Multiscale EM Scattering

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Wei-Bin Kong ◽  
Hou-Xing Zhou ◽  
Wei-Dong Li ◽  
Guang Hua ◽  
Wei Hong
Keyword(s):  
Near Field ◽  
Bottom Layer ◽  
Tree Structure ◽  
Memory Requirement ◽  
Storage Efficiency ◽  
Em Scattering ◽  
Scattering Problems ◽  
Single Tree ◽  
Multiscale Problem ◽  
Fast Multipole Algorithm

We present an efficient strategy for reducing the memory requirement for the near-field matrix in the multilevel fast multipole algorithm (MLFMA) for solving multiscale electromagnetic (EM) scattering problems. A multiscale problem can obviously lower the storage efficiency of the MLFMA for the near-field matrix. This paper focuses on overcoming this shortcoming to a certain extent. A hybrid tree structure for the MLFMA that possesses two kinds of bottom-layer boxes with different edge sizes will be built to significantly reduce the memory requirement for the near-field matrix in the multiscale case compared with the single-tree-structure technique. Several numerical examples are provided to demonstrate the efficiency of the proposed scheme in the multiscale EM scattering.

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