| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compact antenna circuit securing a wide band. SOLUTION: The antenna circuit has inductance elements L1, L2 as radiation elements that are magnetically connected to each other. The antenna circuit includes: an LC serial resonance circuit composed of the inductance element L1 and capacitance elements C1a, C1b, and an LC serial resonance circuit composed of the inductance element L2 and capacitance elements C2a, C2b. A plurality of LC serial resonance circuits are used for radiation of an electric wave, and also used as an inductance of a matching circuit for matching the impedance (50Ω) obtained by viewing a power-supply side from power-supply terminals 5, 6 with a radiation impedance (377Ω) in a free space. COPYRIGHT: (C)2010,JPO&INPIT |
