| 摘要 |
The present invention provides an antenna for a radio device that has sufficient mounting strength with little deterioration in antenna property. A first antenna 1a and a second antenna 1b are provided substantially parallel to each other at both ends of a circuit board 3. Feeding points 2a, 2b are provided at one end of first antenna 1a and second antenna 1b, and are fed in equiphase. As radio-frequency currents 100a, 100b are in equiphase, vertically polarization are radiated, but horizontal radio-frequency currents 101a, 101b are in antiphase, so horizontally polarization are not radiated. Furthermore, antennas 1a, 1b may be formed by the mounting portions of the circuit board on the housing.
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