| 摘要 |
An antenna device includes a dielectric substrate placed upright on a ground conductor, a first radiating conductor and a second radiating conductor that are meandering and are symmetrically disposed on a surface of the dielectric substrate, lower ends of the first radiating conductor and the second radiating conductor being connected at a junction. <??>The antenna device further includes a third radiating conductor that is disposed between the first radiating conductor and the second radiating conductor and extends in a straight line along the symmetry axis of both the radiating conductors. A capacitive conductor is disposed on the dielectric substrate and is substantially parallel to the ground conductor. The upper ends of the first radiating conductor, the second radiating conductor, and the third radiating conductor are connected to the capacitive conductor. <??>The first radiating conductor and the second radiating conductor resonate when a high-frequency power with a first frequency is supplied to the junction. The third radiating conductor resonates when a high-frequency power with a second frequency that is higher than the first frequency is supplied to the junction. <IMAGE> |
