| 摘要 |
A purpose of the present invention is to provide a portable wireless unit capable of suppressing a deterioration of antenna performance, which is caused by electromagnetic mutual effects occurred between two antenna elements, and capable of achieving an improving effect of a high diversity gain, and also capable of realizing a designing characteristic and an operative characteristic in a compatible manner. While an upper case (1) and a lower case (2) are coupled to each other by a hinge portion (3), a circuit board (8) is arranged on the lower case (2), and also, a power feeding element (7) and another power feeding element (20) are arranged in such a separation manner that an interval between these power feeding terminals (7) and (20) is longer than, or equal to “λ/20” on the circuit board (8). Also, while a whip antenna (9) is provided on the lower case (2), this whip antenna (9) is connected via the power feeding terminal (7) to the circuit board (8). Also, while a metal frame (13) is provided on the upper case (1), this metal frame (13) is connected via the hinge portion (3) and the power supply terminal (20) to the circuit board (8). Then, a dipole antenna is constituted by the metal frame (12) and a ground pattern of the circuit board (8) in combination with the hinge portion (3). A diversity receiving operation is carried out based upon antenna outputs of this dipole antenna and the whip antenna (9).
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