| 摘要 |
A dual polarization patch antenna comprising: a patch; a first and second pair of orthogonally disposed probes feeding said patch; and a first feed network for feeding said first pair of probes from a first feed point. The first feed network comprises: vii) a first feed path from said first feed point to a first probe; viii) a second feed path from said first feed point to a second probe; said second feed path being of a different electrical length to said first feed path such as to cause cancellation of signals from said first and second probes at said second pair of probes; and ix) a first frequency dependent element provided in said first feed path for maintaining the desired cancellation over a desired frequency range. A second feed network for feeding said second pair of probes from a second feed point comprises: vii) a third feed path from said second feed point to a third probe; viii) a fourth feed path from said second feed point to a fourth probe, said fourth path being of a different electrical length to the third feed path such as to cause cancellation of signals from the third and fourth probes at said first pair of probes; and a second frequency dependent element provided in said third feed path for maintaining the desired cancellation over a desired frequency range.
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