发明授权
- 专利标题: Method and apparatus for frequency selective beam forming
- 专利标题(中): 频率选择波束成形的方法和装置
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申请号: US09879807申请日: 2001-06-12
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公开(公告)号: US06448938B1公开(公告)日: 2002-09-10
- 发明人: Bing Chiang , Kenneth M. Gainey , James A. Proctor, Jr.
- 申请人: Bing Chiang , Kenneth M. Gainey , James A. Proctor, Jr.
- 主分类号: H01Q2160
- IPC分类号: H01Q2160
摘要:
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 are coupled to respective antenna elements. At least two weighting structures are coupled to the frequency selective components to produce independently steerable beams having spectrally separated signals. The weighting structures 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, 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.
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