| 摘要 |
An antenna device is for a mobile unit to transmit/receive signals, and the mobile unit comprises a printed circuit board which is mounted with a signal processing circuit for processing the signals, the antenna device comprises an antenna body, a metal feeding line, and a ground metal layer. The antenna body is mounted on one side of the mobile unit for transmitting/receiving signals. The metal feeding line made on the upper surface of the printed circuit board, one end of the metal feeding line is connected to the antenna body and the other end of the metal feeding line is in connection with the signal processing circuit from the center part of an edge of the printed circuit board. The ground metal layer is formed on the lower surface of the printed circuit board. When the mobile unit is in transmission, as a result of the metal feeding line is fed from the center part of the edge of the printed circuit board to the signal processing circuit that the well-spread currents are generated upon the surface of the ground metal layer and the antenna device has omnidirectional antenna radiation pattern.
|
