| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized antenna capable of obtaining high gain. SOLUTION: Resonances E1, E2 in which inductances, E11, E21 and capacitances E12, E22 are electrically connected in parallel are electrically connected in series, and an antenna main body B is formed therefrom. A frequency adjusting capacitor 5 is electrically connected between a ground and one end P3 of the antenna main body B. In this case, the resonances E1, E2 are so constituted that at least parts of frequency characteristic curves of the resonances E1, E2 are overlapped at parts of widths of resonance, and the resonances E1, E2 are made to resonate at almost the same reference resonance frequency. The whole of the antenna main body B is constituted to have a resonance frequency higher than the reference resonance frequency. |
