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Efficient large‐scale scattering analysis of objects in a stratified medium
Author(s) -
Zhang Kedi,
Goddard Lynford L.,
Jin JianMing
Publication year - 2019
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.2656
Subject(s) - multipole expansion , finite element method , computational science , computer science , reciprocity (cultural anthropology) , tearing , scale (ratio) , scattering , fast multipole method , algorithm , mathematical optimization , mathematics , physics , engineering , mechanical engineering , structural engineering , optics , psychology , social psychology , quantum mechanics
An efficient method is presented to analyze electromagnetic scattering of large‐scale objects in a stratified medium. The method introduces an inhomogeneous absorbing boundary condition (ABC) to truncate an infinite stratified medium for the finite‐element analysis. It then adopts the dual‐primal finite‐element tearing and interconnecting (FETI‐DP) algorithm with distributed computing to enable and speed up large‐scale simulations on a computer cluster. Finally, the method utilizes the reciprocity theorem to simplify scattered field calculation and employs the multilevel fast multipole algorithm (MLFMA) to improve the computational efficiency. Three verification examples are presented to demonstrate the solution accuracy of the proposed method, followed by an electrically large example to demonstrate the capability of the method for large‐scale electromagnetic modeling of objects in a stratified medium.