| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately secure satisfactory speech communication quality regardless of the displacement of an antenna element. SOLUTION: A desired antenna characteristics can be obtained while the impedance of an antenna is made almost constant regardless of displacement of an antenna element electrically connected to a first feeder terminal when a displacing means displaces the antenna element up to a prescribed position in one direction of making the antenna element close to the ground board, electrically connecting to a second feeder terminal when the displacing means displaces the antenna element up to a prescribed position in the other direction of separating the antenna element from the ground board, connecting electrically to an element to match the impedance of an antenna consisting of the antenna element and the ground board when the antenna element is electrically connected to at least one between the first and second feeder terminals. Thus, it is possible to accurately secure satisfactory speech communication quality regardless of the displacement of the antenna element.</p> |
