Method and apparatus for frequency selective beam forming

Details Method and apparatus for frequency selective beam forming Method and apparatus for frequency selective beam forming

H - Electricity

01

Q

H01Q 21/12 (2006.01) H01Q 1/24 (2006.01) H01Q 3/26 (2006.01) H01Q 5/00 (2006.01) H01Q 9/16 (2006.01) H01Q 9/28 (2006.01) H01Q 21/00 (2006.01) H01Q 21/06 (2006.01) H01Q 25/00 (2006.01) H04B 7/06 (2006.01) H04B 7/08 (2006.01)

Patent

CA 2450454

A phased array antenna provides a subscriber unit with an ability to transmit and receive signals in different directions to allow for optimum gain in both directions, simultaneously. In this way, refraction and multipath effects resulting from communication signals operating at different frequencies can be compensated for to improve gain in both the forward and reverse links. Frequency selective components (410) are coupled to respective antenna elements (210). At least two weighting structures (415 and 420) are coupled to the frequency selective components (410) to produce independently steerable beams having spectrally separated signals. The weighting structures (415 and 420) may include phase shifting elements to steer the beams independently and include at least one variable gain amplifying component to independently amplify the signals received by or transmitted by the respective antenna (210), thereby optimizing the respective shapes of the beams. By having independently steerable and shapable beams, the directive antenna is attractive for use in a multi-band and/or multipath environment, same frequency or spread spectrum network.

L'invention porte sur une antenne à balayage électronique donnant à l'appareil d'un utilisateur la possibilité d'émettre et recevoir des signaux dans différentes direction de manière à obtenir simultanément le gain optimal dans les deux sens. Ainsi, les réfractions et les effets multivoies provenant de signaux de communication de fréquences différentes peuvent être compensés pour améliorer le gain dans les deux sens. Les éléments de sélection de fréquence (410) sont couplés aux éléments correspondants de l'antenne (210). Deux structures de pondération (415 and 420) au moins sont couplées aux composants (410) de sélection de fréquence de manière à produire des faisceaux séparément orientables de signaux séparés spectralement. Les structures de pondération (415 and 420) peuvent comprendre des éléments déphaseurs orientant les faisceaux indépendamment ainsi qu'au moins un composant amplificateur de gain amplifiant indépendamment les signaux reçus ou émis par leur antenne respective (210) afin d'optimiser les formes respectives des faisceaux. Du fait de ses faisceaux orientables et malléables, l'antenne directive présente un intérêt dans les environnements multi-bandes ou multi-voies à fréquence identique ou étalée.

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