| 摘要 |
<p>An antenna device (106) has an antenna element (11) and an impedance converting circuit (25) connected to the antenna element (11). The impedance converting circuit (25) is connected to a power-supply end of the antenna element (11). The impedance converting circuit (25) is interposed between the antenna element (11) and a power-supply circuit (30). The impedance converting circuit (25) has a first inductance element (L1) connected to the power-supply circuit (30) and a second inductance element (L2) coupled to the first inductance element (L1). A first end and a second end of the first inductance element (L1) are connected to the power-supply circuit (30) and the antenna, respectively. A first end and a second end of the second inductance element (L2) are connected to the antenna element (11) and ground, respectively.</p> |
