| 摘要 |
<p>Provided is an antenna apparatus (1) that supplies a power feeding signal to an antenna element (10) via a matching circuit (11). The matching circuit (11) includes a parallel circuit (12) having variable capacitance elements (13, 14), a first inductance element (16) connected in parallel to the variable capacitance elements (13, 14), and a second inductance element (17) connected in series to the variable capacitance elements (13, 14) and connected in parallel to the first inductance element (16). A resonance point of the parallel circuit (12) is set smaller than a tuning frequency (T) of the antenna element (10). The tuning frequency (T) of the antenna element (10) is varied with variation of capacitance of the variable capacitance elements (13, 14).</p> |
