| 摘要 |
High antenna gain can be obtained without utilizing a frame ground of a portable device as a ground necessary for an antenna. In a multiband antenna 30D, a ground element 52D with sides having a plurality of lengths is arranged at an antenna element portion 51 which is a multiband inverted F antenna downsized with the dielectric portion 40. Therefore, with the multiband antenna 30D, antenna gain is increased by making the ground element 52D resonate at resonance frequencies corresponding to the resonance frequencies of the antenna element portion 51. |
