Analyse
Le but de ce travail est d’étendre aux coordonnées spatiales complexes des méthodes asymptotiques déjà rencontrées dans l’optique géométrique et dans la théorie géométrique de la diffraction, mettant en évidence leurs limites et avantages. Après un bref aperçu de cette nouvelle méthode des rayons complexes, on discute deux problèmes : la représentation du champ produit par une source primaire d’antenne à réflecteur à l’aide de sources ou rayons complexes et la diffraction par un réflecteur bidimensionnel, du champ produit par une source rectiligne.
Abstract
The purpose of this paper is to extend to complex space the well known asymptotic techniques of geometrical optics and geometrical theory of diffraction, pointing out advantages and desadvantages. After a review of the various formulations of complex ray optics, two subjects are considered in detail : the representation of the field generated by the feed of a reflector antenna in terms of complex sources or rays and the scattering by a bidimensional reflector illuminated by a line source.
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Ce travail a pu être réalisé grâce à l’appui, d’une part du Consiglio Nazionale delle Ricerche et d’autre part du CSI-Piémonté.
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Montrosset, I., Orta, R. La méthode des rayons complexes. Ann. Télécommun. 38, 135–144 (1983). https://doi.org/10.1007/BF02995899
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DOI: https://doi.org/10.1007/BF02995899
Mots clés
- Antenne hyperfréquence
- Approximation asympto-tique
- Tracé rayon
- Fonction complexe
- Onde évanescente
- Champ électromagnétique
- Antenne ouverture
- Source illumination
- Antenne réflecteur
- Diffraction onde
- Méthode géométrique
- Coordonnée complexe