| 摘要 |
<p>An antenna device for a radio communications apparatus operates in at least two frequency bands. The antenna device has a helical antenna element (11) for the one frequency band and a rod-shaped antenna element (12) for the other frequency band. The helical antenna element (11) is galvanically connected to the circuits in the radio communications apparatus. The rod-shaped antenna element (12) is located outside the helical antenna element (11) and is provided with a supply portion (19) which wholly or partly surrounds the helical element (11) or its extension. A further rod-shaped antenna element is galvanically connected to the supply portion. The two rod-shaped antenna are located on opposite sides of the helical antenna element (11).</p> |
