| 摘要 |
An antenna is structured in a manner that a rectangular radiation electrode, a ground electrode opposed in parallel to a long side and a short side adjacent to each other of the radiation electrode, respectively, and a feeder electrode connected to the long side of the radiation electrode are formed on a substrate. A portion opposed to the long side of the ground electrode has a length not more than the long side and a width equal to or less than a length of the short side, and a portion opposed to the short side of the ground electrode has a length more than the short side and a width equal to or more than a length of the long side.
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