| 摘要 |
<p>An antenna system comprises an electrically conductive antenna element 3 and at least first and second lines for connecting the antenna element 3 to ground 1. The first and second lines are connected to the antenna element 3 at different positions. A third line 10 is provided for connecting the antenna element to a radio apparatus. The first and second lines are respectively provided with first 13 and second 14 circuit components each having an adjustable capacitive and/or inductive reactance (e.g. MEMs, capacitors, inductors or combinations thereof) thereby allowing the antenna system to be tuned. Also disclosed are details for a circuit board comprising the antenna system as defined, a dielectric substrate with a ground plane printed thereon where there is a predetermined area where the ground plane is not printed. A radio communication device comprising the disclosed antenna system and/or the disclosed circuit board could also be produced.</p> |
