Patent ID: 8643549

Claim:
A multi-resonant antenna comprising: a substrate having a substantially rectangular area; a feeding portion formed on said substrate; a first electrode including an open end and a length corresponding to a first operating frequency band, said first electrode extending from the feeding portion in a first direction along a periphery of the substantially rectangular area; a second electrode including an open end and a length corresponding to a second operating frequency band, the second frequency band being higher than the first frequency band, and the second electrode extending from the feeding portion in a second direction opposite to the first direction along the periphery of the substantially rectangular area; and a third electrode including an open end and a length corresponding to a third operating frequency band, the third frequency band being intermediate between the first and second frequency bands, and the third electrode extending from one of a predetermined point of the first electrode, a predetermined point of the second electrode, and the feeding portion, along the first electrode inside the substantially rectangular area surrounded by the first and second electrodes, the open end of the third electrode being closer to the open end of the first electrode than to the open end of the second electrode.