Résumé
Nous présentons une méthode rapide hautes fréquences d’analyse de cibles 3D complexes parfaitement conductrices par une technique de lancer de rayons. Un ensemble de rayons représentant l’onde plane incidente est lancé vers la cible et chaque rayon est suivi au cours de ses interactions. Nous considérons la diffusion des surfaces interceptées au cours des réflexions multiples, la diffraction des arêtes, les interactions surface- arête et arête- surface. Toutes ces contributions sont sommées en champ lointain afin d’évaluer le rayonnement de la cible. Nous présentons des résultats de Surface Equivalente Radar (ser) pour un trièdre, un hélicoptère, un dièdre et une tour.
Abstract
A fast high frequency analysis method of complex 3D perfectly conducting targets is carried out using a Shooting and Bouncing Ray (sbr) approach. A set of rays representating the incident plane wave is shot towards the target and each ray is followed according to reflection and/or diffraction laws. The scattering of intercepted surfaces throughout the multiple bounces, the edge diffraction, the surface- edge and the edge- surface interactions are considered. All these contributions are summed up to compute the target far field. We present Radar Cross Section (rcs) results about an helicopter, a tower and corner reflectors.
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Ramière, G., Combes, P.F., Mametsa, HJ. et al. Couplage du lancer de rayons et des interactions arêtesurface pour une analyse 3d rapide de cibles complexes. Ann. Télécommun. 55, 633–643 (2000). https://doi.org/10.1007/BF02999834
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DOI: https://doi.org/10.1007/BF02999834
Mots clés
- Electromagnétisme
- Cible radar
- Tracé rayon
- Diffraction onde
- Surface équivalente radar
- Modèle tridimensionnel
- Conducteur parfait
- Réflexion multiple
- Optique géométrique
- Optique ondulatoire