Array antenna with shaped reflector(s), highly...

H - Electricity – 01 – Q

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Details

H01Q 19/17 (2006.01) H01Q 15/16 (2006.01) H01Q 21/06 (2006.01)

Patent

CA 2619403

The invention concerns a network antenna with reflector(s) (AR) comprising i) a network (RS) of at least two sources (S1-S5), one of which a central source (S1), arranged and positioned so as to transmit and/or receive beams (F1-F5) in selected directions; ii) beam-forming means for controlling the amplitude and the phase of each of the sources based on amplitude/phase laws applied upon their access and for providing an appropriate amplifying level, so that each source (S1-S5) should transmit a selected radiated pattern (forming a beam and including a main lobe) designed to cover a selected zone (Z1-Z5), and iii) at least one reflector (RC) provided with a surface (SU) capable of reflecting the beams delivered by the sources and/or addressed thereto and configured in three dimensions so as to reflect the beam delivered by each source (S1-S5) by spreading its energy so that it covers the selected associated zone, and that the main lobe of the radiated pattern associated with the central source (S1) should define a primary coverage (CP) including integrally each active coverage zone (ZC1, ZC2) of the antenna, of selected shape and dimensions, and that the main lobe of the radiated pattern associated with each non-central source (S2-S5) should overlap at least partly the primary coverage (CP).

Une antenne réseau à réflecteur(s) (AR) comprend i) un réseau (RS) d'au moins deux sources (S1-S5), dont une source centrale (S1), agencées et positionnées de manière à émettre et/ou recevoir des faisceaux (F1-F5) dans des directions choisies, ii) des moyens de formation de faisceaux chargés de contrôler l'amplitude et la phase de chacune des sources au moyen de lois d'amplitude/phase appliquées sur leurs accès et d'assurer un niveau d'amplification approprié, afin que chaque source (S1-S5) émette un diagramme de rayonnement choisi (constituant un faisceau et comprenant un lobe principal) destiné à couvrir une zone choisie (Z1-Z5), et iii) au moins un réflecteur (RC) muni d'une surface (SU) propre à réfléchir les faisceaux délivrés par les sources et/ou destinés à celles-ci et conformée de façon tridimensionnelle de manière à réfléchir le faisceau délivré par chaque source (S1-S5) en étalant son énergie de sorte qu'il couvre la zone associée choisie, que le lobe principal du diagramme de rayonnement associé à la source centrale (S1) définisse une couverture primaire (CP) englobant intégralement chaque zone de couverture active (ZC1, ZC2) de l'antenne (AR), de forme et dimensions choisies, et que le lobe principal du diagramme de rayonnement associé à chaque source non centrale (S2-S5) recouvre au moins partiellement la couverture primaire (CP).

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