| 摘要 |
The present invention relates to an antenna element comprising a substantially planar conductive disc having at least four slots arranged symmetrically in relation to a central rotational axis perpendicular to the disc, wherein each slot extends from a circumference of said disc radially inwardly toward the central axis and has an associated feed point located at its associated slot, and radially opposite feed points are arranged to be fed with common radio frequency signals which are substantially in phase and with equal amplitude such that the radiation from each slot is in phase and of equal amplitude so that the antenna element radiates along the central axis. Furthermore, the invention also relates to a multiband antenna unit, an antenna array, and a broadband antenna system. |
