Patent ID: 8743014

Claim:
An antenna device comprising: a first antenna element; a second antenna element; a power supply section configured to supply a high-frequency current to the second antenna element; a switching element configured to electrically connect and disconnect the first antenna element and the power supply section with/from each other; a first power supply path through which the first antenna element and the power supply section are electrically connected; and a second power supply path through which the second antenna element and the power supply section are electrically connected, wherein the switching element being provided in the first power supply path, the high-frequency current is supplied to the first antenna element via the switching element during the electrical connection between the first antenna element and the power supply section which electrical connection is made by the switching element, and the first antenna element and the second antenna element being provided so as to be capacitively coupled to each other during the electrical disconnection between the first antenna element and the power supply section which electrical disconnection is made by the switching element.