| 摘要 |
PROBLEM TO BE SOLVED: To achieve a function for sharing three frequencies and a function for sharing a vertically polarized wave and horizontally polarized wave with a compact configuration. SOLUTION: An antenna device includes a pair of first dipole elements 10 for horizontally polarized wave which resonate a frequency f1, a pair of first dipole elements 20 for vertically polarized wave, a pair of second dipole elements 40 for horizontally polarized wave which resonate a frequency f2(>f1) and f3(>f2), and three or more second dipole elements 51 to 54 for vertically polarized wave which are arranged vertically and with a prescribed interval horizontally, wherein at least one dipole element has length that resonates one of the frequencies f2 and f3, and the others have length that resonates the other of the frequencies f2 and f3. In the pair of first dipole elements 10 for horizontally polarized wave, an outer element conductor is set to be longer than an inner element conductor, and the pair of second dipole elements 40 for horizontally polarized wave and the second dipole elements 51 to 54 for vertically polarized wave are arranged between the pair of first dipole elements 20 for vertically polarized wave. COPYRIGHT: (C)2008,JPO&INPIT
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