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Communication Dans Un Congrès Année : 2016

Optimized Iterative Physical Optics for EM Scattering from Large Structures

Résumé

The modelization of electromagnetic interactions between antennas and structures is an important challenge for systems carrying antennas such as aircrafts, satellites, frigates. This problem deals with electromagnetic scattering from large structures with shadowing effect and multiple scattering. A similar problem is the Radar Cross Section computation of large cavities. For both cases, several methods can be used, and Iterative Physical Optics (IPO) is an asymptotic method based on Physical Optics (PO), which has shown good results for such kind of problems. In IPO, several techniques can be used to take into account shadowing effects. The geometrical shadowing, based on ray tracing, is classically used. But a recent method has been proposed and is based on a physical approach: the shadow radiation (around forward direction) with PO approximation. Moreover, the IPO method can be optimized by applying an algebraic compression, the Adaptive Cross Approximation, of the interaction matrices of IPO between coupled surfaces. Results show that IPO matrices can be highly compressed, without degrading the accuracy.
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Dates et versions

hal-01366420 , version 1 (14-09-2016)

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Antoine Thomet, Gildas Kubicke, Christophe Bourlier, Philippe Pouliguen. Optimized Iterative Physical Optics for EM Scattering from Large Structures. 2016 IEEE Conference on Antenna Measurements & Applications (CAMA), Oct 2016, Syracuse, United States. Paper#1010, ⟨10.1109/cama.2016.7815734⟩. ⟨hal-01366420⟩
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