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Preliminary study of AWE method for FEM analysis of scattering problems
Author(s) -
Zhang JingPing,
Jin JianMing
Publication year - 1998
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(199801)17:1<7::aid-mop2>3.0.co;2-o
Subject(s) - radar cross section , finite element method , bandwidth (computing) , scattering , microwave , perfectly matched layer , waveform , radar , frequency band , boundary value problem , numerical analysis , optics , acoustics , mathematical analysis , physics , electronic engineering , mathematics , engineering , telecommunications , structural engineering
The method of asymptotic waveform evaluation (AWE) is applied to the finite‐element analysis of electromagnetic scattering problems. The finite‐element mesh is terminated using a perfectly matched layer (PML), an absorbing boundary condition (ABC), or their combination. It is shown that the finite‐element method (FEM) in conjunction with AWE can predict the radar cross section (RCS) over a frequency band whose bandwidth is highly dependent on the size of the scatterer. For a given order of AWE, the bandwidth decreases when the size of the scatterer increases. A simple binary search algorithm is described to apply AWE at multiple frequency points to generate an accurate solution over a specified frequency band. Numerical examples are given to demonstrate the performance of AWE in the RCS calculation by the FEM. © 1998 John Wiley & Sons, Inc. Microwave Opt Technol Lett 17: 7–12, 1998.