| 摘要 |
<p>A power supply point (27) is marked off at a prescribed position on a conductive bottom board (26). An antenna element (24) is electrically connected to the power supply point (27). A conductor element (28) is electrically connected to the bottom board (26) at a position at a prescribed distance (L) from the power supply point (27). In an antenna device (23), when a current is supplied to the antenna element (24) from the power supply point (27), the current flows into the bottom board (26) from the power supply point (27). As a result, the bottom board (26) functions as antenna element. At this time, the current flowing into the bottom board (26) concentrates at a conductor element (28). A current quantity reduces on the bottom board (26). As a result, influences of human body such as hands and head part to the antenna device (23) are eliminated as much as possible. Deterioration of antenna characteristics is prevented. Further, since only electrical connection of the conductor element (28) to the bottom board (26) is required, manufacturing cost increase can be prevented.</p> |
