| 摘要 |
<p>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.</p> |
