| 摘要 |
<p>Inverted-F antennas having elongated, conductive elements for use within communications devices, such as radiotelephones, are provided. An elongated, meandering conductive element (42) having a plurality of spaced-apart U-shaped undulations (50) is maintained in adjacent, spaced-apart relationship with a first ground plane (44). One or more of the U-shaped undulations capacitively couple to the ground plane and allow the antenna to resonate at lower frequencies and with a greater bandwidth. A second ground plane may be oriented in a direction transverse to the first ground plane so as to be positioned in adjacent, spaced-apart relationship with one or more of the U-shaped undulations. One or more of the U-shaped undulations can capacitively couple to the second ground plane, as well as to the first ground plane. In addition, one or more inductive elements may be electrically connected to an elongated conductive element.</p> |
