| 摘要 |
A directional antenna 1 comprises a first plurality of antenna elements 2 11 forming an antenna array and a second plurality of RF receiver units 13 19 which are fewer in number than that of the first plurality. Each receiver unit 13 19 is arranged to receive RF signals from one or more of the antenna elements 2 - 11 and for outputting a receiver signal accordingly. A signal processor 20 processes the receiver signals 34 according to a directional antenna beam pattern. At least two non-neighbouring antenna elements 2, 5 provide output signals which are coupled to a common RF receiver unit 13 to provide a combined RF signal. The antenna elements 2 11 may each be a sub-array of antenna elements. Also disclosed is a directional antenna comprising a plurality of antenna elements each providing output signals to a respective RF receiver unit where neighbouring RF receiver units are connected to non-neighbouring antenna elements. The output signals from the RF receiver units are provided to a directional beam pattern signal processor. |
