| 摘要 |
<p>A patch antenna 10 comprises a patch radiator 12 with a central region surrounded by edge regions where at least a feed structure 14 is arranged to connect a signal feed port 2a to at least first and second feed points 4a-d which are located at a respective edge regions 8a, 8b of the patch 12, at opposite sides of the said central region. The feed structure 14 may comprise at least a transmission line portion arranged parallel to the patch radiator 12 which is connected to the first and second feed points 4a-d. The transmission line portion may be disposed between the patch radiator 12 and a ground plane. The feed port 2a may be located closer to the first feed point 4a than the second feed point 4b and may comprise a Y-shaped transmission portion connecting to first and second transmission line portions which connect to feed points 4a, 4b and 4c, 4d, respectively. The patch radiator 12 may include a centrally located ground plane connection pillar 18 which extends between the transmission line portions. A further feed structure 16, with a feed port 2b, may be arranged perpendicular to feed structure 14 and further away from the patch radiator 12, to allow antenna operation under different signal polarisation conditions.</p> |
