Abstract
Frequency Selective Surfaces (fss), used as quasioptical diplexers in reflector antenna systems for telecommunication satellites are attracting much interest, since they allow multifrequency illumination of the main reflector, with consequent mass saving. In this paper the spectral characterization of these surfaces is discussed, and the solution of the scattering problem via the Moment Method is described. The general characteristics of the frequency response of fss are reviewed, when the incident field is a plane wave. Then a method is presented to analyse the behaviour offss in their actual operating environment, even in the near field region of the feeds.
Analyse
Les surfaces dichroïques (fss), utilisées comme diplexeurs quasi optiques dans des antennes pour satellites de télécommunication permettent actuellement l’éclairement du réflecteur principal avec plusieurs fréquences et, par conséquent, la réduction du poids de l’antenne. Dans cet article, les auteurs discutent de la caractérisation spectrale de ces surfaces et donnent la résolution du problème de diffraction par la méthode des moments. Les caractéristiques globales de la réponse en fréquence des surfaces dichroïques sont présentées dans le cas où le champ incident est représenté par une onde plane. Ensuite, on indique une méthode d’analyse du comportement d’une surface dichroïque dans des conditions de fonctionnement et on considère aussi le cas où celle-ci est placée dans la région de champ proche des sources primaires.
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This work has been partially supported bymatra in the framework of theesa contract n∘ 5279/82/f/rd (sc).
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Orta, R., Tascone, R. & Zich, R. Frequency selective surfaces: spectral characterization and application to multifrequency antenna systems. Ann. Télécommun. 40, 378–386 (1985). https://doi.org/10.1007/BF03003645
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DOI: https://doi.org/10.1007/BF03003645
Key words
- Dichroism
- Reflector antenna
- Offset feed antenna
- Space antenna
- Multifrequency antenna
- Multiplexer
- Diplexer
- Periodic structure
- Transmission mode
- Reflection mode
- Spectral data
- Microwave antenna