Abstract
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.
Original language | English (US) |
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Pages (from-to) | 7-12 |
Number of pages | 6 |
Journal | Microwave and Optical Technology Letters |
Volume | 17 |
Issue number | 1 |
DOIs | |
State | Published - 1998 |
Keywords
- Asymptotic waveform evaluation
- Electromagnetic scattering
- Finite-element method
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering