| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-performance antenna device which can improve mountability by miniaturization without increasing the number of antenna elements while it can receive a plurality of broadcast waves having different bands, and can improve a degree of freedom in layout. SOLUTION: The antenna device 1 includes: antenna elements 2 having a pair of conductors d1, d2 linearly disposed oppositely to each other; a capacitor C for connecting the pair of conductors d1, d2; a switching circuit 3 for connecting ends of a plurality of the antenna elements 2; a pair of coils L1, L2 connected to the pair of conductors d1, d2 of the antenna element 2 at the base end side, respectively; and a switching control section 4 for controlling the switching circuit 3 by DC voltages applied to the pair of conductors d1, d2 via the coils L1, L2, and switching a state between the conductors d1 and d2 of the antenna element 2 into either a conduction state for conducting a high frequency or an interruption state for interrupting the high frequency. COPYRIGHT: (C)2011,JPO&INPIT
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