Radio antenna system

H - Electricity – 01 – Q

Patent

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Details

H01Q 3/40 (2006.01) H01Q 1/24 (2006.01) H01Q 25/00 (2006.01) H01Q 25/04 (2006.01)

Patent

CA 2288635

The invention relates to an apparatus and a method for simultaneously generating, with the same radio antenna apparatus (10), a number of narrow beams and a wide beam, covering substantially the same area covered by the individual pointed beams together. The radio antenna apparatus (10) comprises an antenna array (3), a Butler matrix (2) connected to the antenna array and a set of amplifying modules (1a,...,1h). The activation of each of the inputs (L1,...,L8) of the radio antenna apparatus corresponds to a radiation pattern characterized by a narrow beam with a high antenna gain from the antenna array (3). By simultaneously activating the beam ports with the same signal with suitable phase relationships a superimposition of the radiation patterns to which the activated beam port corresponds is achieved in such a way that a wide beam is generated. Since all amplifying modules (1a,...,1h) are used simultaneously, the lower antenna gain of the wide beam will be compensated by a corresponding higher amplification. The wide beam will therefore have substantially the same range as the narrow beams.

L'invention concerne un appareil et un procédé permettant de générer simultanément, avec le même ensemble antenne radio (10), un certain nombre de faisceaux étroits et un faisceau large, couvrant sensiblement la même zone couverte par l'ensemble des faisceaux pointés individuellement. L'ensemble antenne radio (10) comprend un réseau d'antennes (3), une matrice de Butler (2) raccordée au réseau d'antennes et un ensemble de modules d'amplification (1a,...1h). L'activation de chacune des entrées (L1,..., L8) de l'ensemble antenne radio correspond à un diagramme de rayonnement caractérisé par un faisceau étroit avec un gain d'antenne élevé du réseau d'antennes (3). Par activation simultanée des accès de faisceaux à l'aide du même signal avec des relations de phase adéquates, une superposition des diagrammes de rayonnement, auxquels l'accès de faisceau activé correspond, est réalisée de telle manière qu'un faisceau large soit généré. Puisque tous les modules amplificateurs (1a,..., 1h) sont utilisés simultanément, le plus faible gain d'antenne du large faisceau sera compensé par une plus grande amplification correspondante. Le large faisceau aura ainsi sensiblement la même étendue que le faisceau étroit.

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