| 摘要 |
<p>An antenna for a wireless communications system with an essentially plane antenna element of electrically conductive material, located a distance above and in parallel with a ground plane of electrically conductive material, were the antenna element has a centred hole. The hole in the antenna element is spanned by four corners that forms a substantially rectangular shape, but were one or more of the edges of the hole is curved and by that have an extended contour length, said hole having a smaller area but a longer contour than corresponding hole with straight lines between the four corners. The radio signal is via an electrical conductor coupled to the antenna element, and ground of the signal is via an electrical conductor coupled to the ground plane.</p> |
