| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized antenna apparatus having a wide specific bandwidth. SOLUTION: This apparatus is so constituted that a concave 2a is formed on a dielectric substrate 2, and that a short-circuit electrode 5, which connects a radiation electrode 3 to each of ground electrodes 6 and 7, is formed on the front side 2d of the dielectric substrate 2.
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