Journal ArticleDOI
A fast iterative physical optics (FIPO) algorithm based on non‐uniform polar grid interpolation
TLDR
In this article, a fast iterative physical optics (FIPO) algorithm is proposed for analysis of scattering from electrically large objects involving multiple reflections such as the case for open-ended cavities.Abstract:
In this paper, a novel fast iterative physical optics (FIPO) algorithm is proposed for analysis of scattering from electrically large objects involving multiple reflections such as the case for open-ended cavities. At each iteration, the physical optics current induced on the surface of the scatterer produces a correction to the incident field, which in turn induces a correction to the physical optics current. The FIPO algorithm relies on fast field evaluation, which is achieved via domain decomposition of the scatterer surface and comprises two steps repeated for each subdomain. First, computation of the field is produced by currents residing within a subdomain over a sparse set of points surrounding the scatterer. Second, phase removal, interpolation, phase restoration, and aggregation of the field of the subdomain are integrated into the total field on the surface. The proposed approach can be extended to fast iterative solution of problems discretized via the method of moments. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 240–244, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10568read more
Citations
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Journal ArticleDOI
A fast physical optics (FPO) algorithm for high frequency scattering
TL;DR: A novel algorithm referred as the fast physical optics (FPO) for computing the back-scattered field over a range of aspect angles and frequencies is presented and is especially suited for generation of synthetic data for radar imaging simulation.
Journal ArticleDOI
Multilevel nonuniform grid algorithm for acceleration of integral equation-based solvers for acoustic scattering
Yaniv Brick,Amir Boag +1 more
TL;DR: This multilevel NG algorithm is used to reduce the computational cost of applying the field evaluation operator and its adjoint, as required in each iteration of the conjugate gradient solver based on the BEM-discretized integral representation of scattering problems.
Journal ArticleDOI
Nonuniform polar grid algorithm for fast field evaluation
TL;DR: A novel algorithm to efficiently compute time-harmonic fields produced by known two-dimensional source constellations using the method of moments to speed up the fast iterative analysis of scattering phenomena.
Journal ArticleDOI
A fast physical optics (FPO) algorithm for double-bounce scattering
Amir Boag,Eric Michielssen +1 more
TL;DR: In this article, the fast physical optics (FPO) method for computing back-scattered fields over ranges of aspect angles and frequencies is extended to encompass double-bounce scattering.
References
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Journal ArticleDOI
Handbook of Mathematical Functions
Journal ArticleDOI
An iterative physical optics approach for analyzing the electromagnetic scattering by large open-ended cavities
TL;DR: In this article, a formulation based on the high frequency asymptotic principles of physical optics is developed for analyzing the scattering by relatively arbitrary open-ended waveguide cavities containing complex interior terminations.
Journal ArticleDOI
GRECO: graphical electromagnetic computing for RCS prediction in real time
TL;DR: An innovative approach to computing the high-frequency radar cross sections (RCSs) of complex radar targets in real time, using a 3-D graphics workstation, is presented.
Journal ArticleDOI
Fast far‐field approximation for calculating the RCS of large objects
Cai-Cheng Lu,Weng Cho Chew +1 more
TL;DR: A fast far-field approximation (FAFFA) is developed to estimate the RCS of conducting scatterers and can predict a RCS that is very close to exact solution, and that the method can be applied to objects with very large electrical sizes.
Journal ArticleDOI
Multilevel evaluation of electromagnetic fields for the rapid solution of scattering problems
Eric Michielssen,Amir Boag +1 more
TL;DR: A multilevel algorithm is presented for evaluating fields generated by given distributions of electric current using the limited number of degrees of freedom that characterize a field observed over a domain that is well separated from a source domain.
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