| 摘要 |
<p>A cradle (10) can be mounted in a vehicle, or other suitable location, for supporting a wireless dual-frequency telephone (12) that includes an antenna (14). The cradle includes a plastic housing (16) and a ground plane (18a, 18b) disposed in the housing. A through-shaped feed coupler element (26) is electrically connected to matching circuits (36) and an input/output connector (38). A first parasitic coupler element is aligned with the feed coupler element (32), and connected to the ground plane, and electromagnetically couples signals having a first frequency to and from the antenna. Together, the elements hold the antenna of the telephone. Also, a second parasitic element (52) is disposed adjacent the feed coupler element for electromagnetically coupling signals to and from the antenna, that have a second frequency. If desired, the ground plane is established by a first conductive board (18a) and a second conductive board (18b) elevated above the first board.</p> |
