| 摘要 |
A compound radio antenna comprising a plurality of directional antenna elements and provided with control circuitry adapted selectively to enable one or more of the elements in direct response to detected characteristics of received radio signals. The antenna is able to make use of angular and/or polarisation diversity, and is able intelligently to steer from a substantially omni-directional mode of operation to a highly directional mode in response to the received radio signals, thereby helping to improve sensitivity and gain while reducing interference.
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